<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:bf20a9bf-e9fe-46d7-9b63-576c8c9b55ba,g:8bcd9cdf-3f10-410e-9fbf-c08bb10d6f88-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <link:roleRef roleURI="http://www.paylocity.com/role/UnauditedConsolidatedStatementofChangesinStockholdersEquity" xlink:type="simple" xlink:href="pcty-20251231.xsd#UnauditedConsolidatedStatementofChangesinStockholdersEquity"/>
  <link:definitionLink xlink:role="http://www.paylocity.com/role/UnauditedConsolidatedStatementofChangesinStockholdersEquity" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_a1c296d8-3f39-4804-8098-858ae30c43ec" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_deb04994-8ece-48c1-b763-40887238f031" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_a1c296d8-3f39-4804-8098-858ae30c43ec" xlink:to="loc_us-gaap_StatementTable_deb04994-8ece-48c1-b763-40887238f031" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_bd2d5360-498a-4f27-afcc-df77344c7835" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_deb04994-8ece-48c1-b763-40887238f031" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_bd2d5360-498a-4f27-afcc-df77344c7835" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_bd2d5360-498a-4f27-afcc-df77344c7835_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_bd2d5360-498a-4f27-afcc-df77344c7835" xlink:to="loc_us-gaap_EquityComponentDomain_bd2d5360-498a-4f27-afcc-df77344c7835_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_492a25d5-c42a-4543-a259-a852005a4bde" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_bd2d5360-498a-4f27-afcc-df77344c7835" xlink:to="loc_us-gaap_EquityComponentDomain_492a25d5-c42a-4543-a259-a852005a4bde" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_48cae523-4837-4dc2-be3f-abbb28721382" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_492a25d5-c42a-4543-a259-a852005a4bde" xlink:to="loc_us-gaap_CommonStockMember_48cae523-4837-4dc2-be3f-abbb28721382" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_771c7016-7893-4b50-8bc7-13160be2161c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_492a25d5-c42a-4543-a259-a852005a4bde" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_771c7016-7893-4b50-8bc7-13160be2161c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_007cbd46-c0df-4585-aa87-32a9b7c760d8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_492a25d5-c42a-4543-a259-a852005a4bde" xlink:to="loc_us-gaap_RetainedEarningsMember_007cbd46-c0df-4585-aa87-32a9b7c760d8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_4be8476b-5fb6-4c83-9e40-e9462b77cac7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_492a25d5-c42a-4543-a259-a852005a4bde" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_4be8476b-5fb6-4c83-9e40-e9462b77cac7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_5484f35d-b612-4333-ad75-cd88227d1839" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_a1c296d8-3f39-4804-8098-858ae30c43ec" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_5484f35d-b612-4333-ad75-cd88227d1839" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_26dfe84b-2f46-418d-953a-0b68866057c8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_5484f35d-b612-4333-ad75-cd88227d1839" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_26dfe84b-2f46-418d-953a-0b68866057c8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_23a70df7-1799-4e3d-90d8-ba558d64ab90" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_5484f35d-b612-4333-ad75-cd88227d1839" xlink:to="loc_us-gaap_StockholdersEquity_23a70df7-1799-4e3d-90d8-ba558d64ab90" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_f44feb95-50c5-47c5-bc7c-66bc3c0bb912" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_5484f35d-b612-4333-ad75-cd88227d1839" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_f44feb95-50c5-47c5-bc7c-66bc3c0bb912" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_09d93580-f64e-4675-a6f4-80964bb36790" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_5484f35d-b612-4333-ad75-cd88227d1839" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_09d93580-f64e-4675-a6f4-80964bb36790" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_739ed0f2-f354-47b6-8a7a-4726680f891d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_5484f35d-b612-4333-ad75-cd88227d1839" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_739ed0f2-f354-47b6-8a7a-4726680f891d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_StockIssuedDuringPeriodSharesEquityAwardVesting_f7b11f8a-22b3-4b20-99b6-c69019720216" xlink:href="pcty-20251231.xsd#pcty_StockIssuedDuringPeriodSharesEquityAwardVesting"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_5484f35d-b612-4333-ad75-cd88227d1839" xlink:to="loc_pcty_StockIssuedDuringPeriodSharesEquityAwardVesting_f7b11f8a-22b3-4b20-99b6-c69019720216" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_c8d34672-a7d3-461e-a82b-eb4a75b47b58" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_5484f35d-b612-4333-ad75-cd88227d1839" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_c8d34672-a7d3-461e-a82b-eb4a75b47b58" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_9badecd0-71e0-4778-87d2-0f7775727f89" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_5484f35d-b612-4333-ad75-cd88227d1839" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_9badecd0-71e0-4778-87d2-0f7775727f89" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_NetSettlementForTaxesAndorExercisePriceRelatedToEquityAwardsInShares_61cb5779-2be0-4299-bed8-3c1bb4c48db2" xlink:href="pcty-20251231.xsd#pcty_NetSettlementForTaxesAndorExercisePriceRelatedToEquityAwardsInShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_5484f35d-b612-4333-ad75-cd88227d1839" xlink:to="loc_pcty_NetSettlementForTaxesAndorExercisePriceRelatedToEquityAwardsInShares_61cb5779-2be0-4299-bed8-3c1bb4c48db2" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_NetSettlementForTaxesAndorExercisePriceRelatedToEquityAwards_53ebfff5-5b2a-43cc-bec7-10ea9d239abd" xlink:href="pcty-20251231.xsd#pcty_NetSettlementForTaxesAndorExercisePriceRelatedToEquityAwards"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_5484f35d-b612-4333-ad75-cd88227d1839" xlink:to="loc_pcty_NetSettlementForTaxesAndorExercisePriceRelatedToEquityAwards_53ebfff5-5b2a-43cc-bec7-10ea9d239abd" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_e6306849-c3b0-4185-afc8-1e64c125104f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockRepurchasedAndRetiredDuringPeriodShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_5484f35d-b612-4333-ad75-cd88227d1839" xlink:to="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_e6306849-c3b0-4185-afc8-1e64c125104f" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_47a76ded-7b42-412f-97d9-b2147cea9477" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockRepurchasedAndRetiredDuringPeriodValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_5484f35d-b612-4333-ad75-cd88227d1839" xlink:to="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_47a76ded-7b42-412f-97d9-b2147cea9477" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_a568a4a2-838c-4d0c-bd54-7a1d6d26d12b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_5484f35d-b612-4333-ad75-cd88227d1839" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_a568a4a2-838c-4d0c-bd54-7a1d6d26d12b" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_dd8053f6-07f5-4baa-a308-51744dd849f1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_5484f35d-b612-4333-ad75-cd88227d1839" xlink:to="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_dd8053f6-07f5-4baa-a308-51744dd849f1" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeOtherNetOfTax_cb21646d-2406-41cf-b903-c4c959539ffe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeOtherNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_5484f35d-b612-4333-ad75-cd88227d1839" xlink:to="loc_us-gaap_OtherComprehensiveIncomeOtherNetOfTax_cb21646d-2406-41cf-b903-c4c959539ffe" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_d27d417c-606b-41b6-9483-ba6f5af29650" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_5484f35d-b612-4333-ad75-cd88227d1839" xlink:to="loc_us-gaap_NetIncomeLoss_d27d417c-606b-41b6-9483-ba6f5af29650" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_0985a32a-9876-4ba8-9cd7-927c763e6de5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_de1e755c-a8a7-4a29-a937-5f244dfb41bd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.paylocity.com/role/RevenueDisaggregationDetails" xlink:type="simple" xlink:href="pcty-20251231.xsd#RevenueDisaggregationDetails"/>
  <link:definitionLink xlink:role="http://www.paylocity.com/role/RevenueDisaggregationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_d1aadfce-6cd0-49b2-8658-19ec77c06c0f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_146b8e7d-c47a-4059-8879-56156409519a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_d1aadfce-6cd0-49b2-8658-19ec77c06c0f" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_146b8e7d-c47a-4059-8879-56156409519a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_ad8d126c-cdba-48da-997d-9ad85e1135f2" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_146b8e7d-c47a-4059-8879-56156409519a" xlink:to="loc_srt_ProductOrServiceAxis_ad8d126c-cdba-48da-997d-9ad85e1135f2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_ad8d126c-cdba-48da-997d-9ad85e1135f2_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_ad8d126c-cdba-48da-997d-9ad85e1135f2" xlink:to="loc_srt_ProductsAndServicesDomain_ad8d126c-cdba-48da-997d-9ad85e1135f2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_3ed99e76-0e4e-4075-a770-570c378ee917" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_ad8d126c-cdba-48da-997d-9ad85e1135f2" xlink:to="loc_srt_ProductsAndServicesDomain_3ed99e76-0e4e-4075-a770-570c378ee917" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_RecurringFeesMember_3a0d5623-8bcd-4058-9a46-77753bf8355f" xlink:href="pcty-20251231.xsd#pcty_RecurringFeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_3ed99e76-0e4e-4075-a770-570c378ee917" xlink:to="loc_pcty_RecurringFeesMember_3a0d5623-8bcd-4058-9a46-77753bf8355f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_ImplementationServicesAndOtherMember_b3fcb07b-04f1-45d5-98fa-c3a529e46463" xlink:href="pcty-20251231.xsd#pcty_ImplementationServicesAndOtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_3ed99e76-0e4e-4075-a770-570c378ee917" xlink:to="loc_pcty_ImplementationServicesAndOtherMember_b3fcb07b-04f1-45d5-98fa-c3a529e46463" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_d346aa83-0900-43d5-9643-37c19a904d3c" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_146b8e7d-c47a-4059-8879-56156409519a" xlink:to="loc_srt_RangeAxis_d346aa83-0900-43d5-9643-37c19a904d3c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_d346aa83-0900-43d5-9643-37c19a904d3c_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_d346aa83-0900-43d5-9643-37c19a904d3c" xlink:to="loc_srt_RangeMember_d346aa83-0900-43d5-9643-37c19a904d3c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_0b691eb5-6530-4183-a38a-640b1fca856e" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_d346aa83-0900-43d5-9643-37c19a904d3c" xlink:to="loc_srt_RangeMember_0b691eb5-6530-4183-a38a-640b1fca856e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_6638436c-c3b6-40f7-9bee-38bfacbcb1b5" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_0b691eb5-6530-4183-a38a-640b1fca856e" xlink:to="loc_srt_MaximumMember_6638436c-c3b6-40f7-9bee-38bfacbcb1b5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_CancellationNoticePeriod_517e6dc4-dba5-4d84-bbcb-f9cbe8cc7130" xlink:href="pcty-20251231.xsd#pcty_CancellationNoticePeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_d1aadfce-6cd0-49b2-8658-19ec77c06c0f" xlink:to="loc_pcty_CancellationNoticePeriod_517e6dc4-dba5-4d84-bbcb-f9cbe8cc7130" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_PeriodOfTermArrangement_8c073041-5263-4a0a-a00b-5649734acd2d" xlink:href="pcty-20251231.xsd#pcty_PeriodOfTermArrangement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_d1aadfce-6cd0-49b2-8658-19ec77c06c0f" xlink:to="loc_pcty_PeriodOfTermArrangement_8c073041-5263-4a0a-a00b-5649734acd2d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_ContractsWithCustomersAbstract_20a641e5-f8d9-46fd-8714-736f4c1d61ad" xlink:href="pcty-20251231.xsd#pcty_ContractsWithCustomersAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_d1aadfce-6cd0-49b2-8658-19ec77c06c0f" xlink:to="loc_pcty_ContractsWithCustomersAbstract_20a641e5-f8d9-46fd-8714-736f4c1d61ad" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_c0ba4d30-ffc1-417a-83a8-490286d52438" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_pcty_ContractsWithCustomersAbstract_20a641e5-f8d9-46fd-8714-736f4c1d61ad" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_c0ba4d30-ffc1-417a-83a8-490286d52438" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.paylocity.com/role/RevenueDeferredRevenueDetails" xlink:type="simple" xlink:href="pcty-20251231.xsd#RevenueDeferredRevenueDetails"/>
  <link:definitionLink xlink:role="http://www.paylocity.com/role/RevenueDeferredRevenueDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_472ac631-55b6-4999-b2eb-da30c67b57d5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_1cd6f1b5-3ab8-41e7-8aa8-ec4fb544a6ed" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_472ac631-55b6-4999-b2eb-da30c67b57d5" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_1cd6f1b5-3ab8-41e7-8aa8-ec4fb544a6ed" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_5cdd7bf7-3ece-49bf-a91b-88905ff73c99" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_1cd6f1b5-3ab8-41e7-8aa8-ec4fb544a6ed" xlink:to="loc_srt_RangeAxis_5cdd7bf7-3ece-49bf-a91b-88905ff73c99" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_5cdd7bf7-3ece-49bf-a91b-88905ff73c99_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_5cdd7bf7-3ece-49bf-a91b-88905ff73c99" xlink:to="loc_srt_RangeMember_5cdd7bf7-3ece-49bf-a91b-88905ff73c99_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_3f2e78a0-27ff-4aee-9fae-40a03c8df8cc" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_5cdd7bf7-3ece-49bf-a91b-88905ff73c99" xlink:to="loc_srt_RangeMember_3f2e78a0-27ff-4aee-9fae-40a03c8df8cc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_e0c1b028-4fba-47e7-9d97-32b6ae8a5a34" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_3f2e78a0-27ff-4aee-9fae-40a03c8df8cc" xlink:to="loc_srt_MaximumMember_e0c1b028-4fba-47e7-9d97-32b6ae8a5a34" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_a8fa1f4e-de2c-4429-927a-55878b7b1ac1" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_1cd6f1b5-3ab8-41e7-8aa8-ec4fb544a6ed" xlink:to="loc_srt_ProductOrServiceAxis_a8fa1f4e-de2c-4429-927a-55878b7b1ac1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_a8fa1f4e-de2c-4429-927a-55878b7b1ac1_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_a8fa1f4e-de2c-4429-927a-55878b7b1ac1" xlink:to="loc_srt_ProductsAndServicesDomain_a8fa1f4e-de2c-4429-927a-55878b7b1ac1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_7c3feaa1-29f7-47b8-9d62-bc445d25896d" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_a8fa1f4e-de2c-4429-927a-55878b7b1ac1" xlink:to="loc_srt_ProductsAndServicesDomain_7c3feaa1-29f7-47b8-9d62-bc445d25896d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_ImplementationServicesAndOtherMember_5a5995b7-fa79-4976-a702-ce387e068333" xlink:href="pcty-20251231.xsd#pcty_ImplementationServicesAndOtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_7c3feaa1-29f7-47b8-9d62-bc445d25896d" xlink:to="loc_pcty_ImplementationServicesAndOtherMember_5a5995b7-fa79-4976-a702-ce387e068333" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_AmortizationPeriodForNonRefundableImplementationFees_bc82494b-443b-4c4d-8f26-f607c8214e05" xlink:href="pcty-20251231.xsd#pcty_AmortizationPeriodForNonRefundableImplementationFees"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_472ac631-55b6-4999-b2eb-da30c67b57d5" xlink:to="loc_pcty_AmortizationPeriodForNonRefundableImplementationFees_bc82494b-443b-4c4d-8f26-f607c8214e05" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ChangeInContractWithCustomerLiabilityAbstract_72265105-2a6a-4624-91db-cf22e3225f99" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ChangeInContractWithCustomerLiabilityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_472ac631-55b6-4999-b2eb-da30c67b57d5" xlink:to="loc_us-gaap_ChangeInContractWithCustomerLiabilityAbstract_72265105-2a6a-4624-91db-cf22e3225f99" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiability_e497ab83-1c59-40b5-a991-1c987276c8a7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractWithCustomerLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ChangeInContractWithCustomerLiabilityAbstract_72265105-2a6a-4624-91db-cf22e3225f99" xlink:to="loc_us-gaap_ContractWithCustomerLiability_e497ab83-1c59-40b5-a991-1c987276c8a7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_cc8d56b1-b205-49ab-8e11-6f39d5393b7e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInContractWithCustomerLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ChangeInContractWithCustomerLiabilityAbstract_72265105-2a6a-4624-91db-cf22e3225f99" xlink:to="loc_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_cc8d56b1-b205-49ab-8e11-6f39d5393b7e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_a37e82b5-19e1-4169-be38-ae77a8407d51" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractWithCustomerLiabilityRevenueRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ChangeInContractWithCustomerLiabilityAbstract_72265105-2a6a-4624-91db-cf22e3225f99" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_a37e82b5-19e1-4169-be38-ae77a8407d51" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiability_d888a051-e4f3-4067-8e37-0428c61118ff" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractWithCustomerLiability"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_ContractWithCustomerRevenueDeferredToBeRecognizedRemainderOfFiscalYear_6a4724c0-6426-4fb5-b4a7-4b07219d7a33" xlink:href="pcty-20251231.xsd#pcty_ContractWithCustomerRevenueDeferredToBeRecognizedRemainderOfFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_472ac631-55b6-4999-b2eb-da30c67b57d5" xlink:to="loc_pcty_ContractWithCustomerRevenueDeferredToBeRecognizedRemainderOfFiscalYear_6a4724c0-6426-4fb5-b4a7-4b07219d7a33" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_ContractWithCustomerRevenueDeferredToBeRecognizedInNextTwelveMonths_b926415a-4413-4083-a59d-f5815e17a6e1" xlink:href="pcty-20251231.xsd#pcty_ContractWithCustomerRevenueDeferredToBeRecognizedInNextTwelveMonths"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_472ac631-55b6-4999-b2eb-da30c67b57d5" xlink:to="loc_pcty_ContractWithCustomerRevenueDeferredToBeRecognizedInNextTwelveMonths_b926415a-4413-4083-a59d-f5815e17a6e1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_ContractWithCustomerRevenueDeferredToBeRecognizedInYearTwoAndThereafter_f23bc020-ea97-4970-9f68-176f838ad222" xlink:href="pcty-20251231.xsd#pcty_ContractWithCustomerRevenueDeferredToBeRecognizedInYearTwoAndThereafter"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_472ac631-55b6-4999-b2eb-da30c67b57d5" xlink:to="loc_pcty_ContractWithCustomerRevenueDeferredToBeRecognizedInYearTwoAndThereafter_f23bc020-ea97-4970-9f68-176f838ad222" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.paylocity.com/role/RevenueDeferredContractCostsDetails" xlink:type="simple" xlink:href="pcty-20251231.xsd#RevenueDeferredContractCostsDetails"/>
  <link:definitionLink xlink:role="http://www.paylocity.com/role/RevenueDeferredContractCostsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_db243776-a038-4153-b928-4be45f4b04c0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_494a7d5a-c4e5-4eb9-bfac-0957cfd470d7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_db243776-a038-4153-b928-4be45f4b04c0" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_494a7d5a-c4e5-4eb9-bfac-0957cfd470d7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedContractCostAxis_500665b1-e529-40ce-9983-8e67ff578a64" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CapitalizedContractCostAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_494a7d5a-c4e5-4eb9-bfac-0957cfd470d7" xlink:to="loc_us-gaap_CapitalizedContractCostAxis_500665b1-e529-40ce-9983-8e67ff578a64" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedContractCostDomain_500665b1-e529-40ce-9983-8e67ff578a64_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CapitalizedContractCostDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CapitalizedContractCostAxis_500665b1-e529-40ce-9983-8e67ff578a64" xlink:to="loc_us-gaap_CapitalizedContractCostDomain_500665b1-e529-40ce-9983-8e67ff578a64_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedContractCostDomain_69654f72-a02a-4695-b051-3c91eff754f3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CapitalizedContractCostDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CapitalizedContractCostAxis_500665b1-e529-40ce-9983-8e67ff578a64" xlink:to="loc_us-gaap_CapitalizedContractCostDomain_69654f72-a02a-4695-b051-3c91eff754f3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_CostsToObtainANewContractMember_929ae050-a8e2-484e-9742-e8d37843574f" xlink:href="pcty-20251231.xsd#pcty_CostsToObtainANewContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalizedContractCostDomain_69654f72-a02a-4695-b051-3c91eff754f3" xlink:to="loc_pcty_CostsToObtainANewContractMember_929ae050-a8e2-484e-9742-e8d37843574f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_CostsToFulfillAContractMember_757a73ce-0470-4bc8-addc-1861bad61eac" xlink:href="pcty-20251231.xsd#pcty_CostsToFulfillAContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalizedContractCostDomain_69654f72-a02a-4695-b051-3c91eff754f3" xlink:to="loc_pcty_CostsToFulfillAContractMember_757a73ce-0470-4bc8-addc-1861bad61eac" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedContractCostNetAbstract_ee3e8702-06cf-422c-a52a-66b4843d5d9f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CapitalizedContractCostNetAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_db243776-a038-4153-b928-4be45f4b04c0" xlink:to="loc_us-gaap_CapitalizedContractCostNetAbstract_ee3e8702-06cf-422c-a52a-66b4843d5d9f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedContractCostAmortizationPeriod_56c948f6-10dd-4b40-aadd-8d115bca002e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CapitalizedContractCostAmortizationPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalizedContractCostNetAbstract_ee3e8702-06cf-422c-a52a-66b4843d5d9f" xlink:to="loc_us-gaap_CapitalizedContractCostAmortizationPeriod_56c948f6-10dd-4b40-aadd-8d115bca002e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedContractCostNet_438d4e29-f36a-4106-bb8a-1e3da1f12464" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CapitalizedContractCostNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalizedContractCostNetAbstract_ee3e8702-06cf-422c-a52a-66b4843d5d9f" xlink:to="loc_us-gaap_CapitalizedContractCostNet_438d4e29-f36a-4106-bb8a-1e3da1f12464" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_CapitalizedContractCostAdditions_54d5af73-018a-4663-97e3-f09bf8a4c571" xlink:href="pcty-20251231.xsd#pcty_CapitalizedContractCostAdditions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalizedContractCostNetAbstract_ee3e8702-06cf-422c-a52a-66b4843d5d9f" xlink:to="loc_pcty_CapitalizedContractCostAdditions_54d5af73-018a-4663-97e3-f09bf8a4c571" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedContractCostAmortization_a2495c5b-6c82-4db8-b76d-b93df20fbecd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CapitalizedContractCostAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalizedContractCostNetAbstract_ee3e8702-06cf-422c-a52a-66b4843d5d9f" xlink:to="loc_us-gaap_CapitalizedContractCostAmortization_a2495c5b-6c82-4db8-b76d-b93df20fbecd" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedContractCostNet_92be2578-e575-45e6-86cb-ba42a22798ec" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CapitalizedContractCostNet"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.paylocity.com/role/RevenueRemainingPerformanceObligationsDetails" xlink:type="simple" xlink:href="pcty-20251231.xsd#RevenueRemainingPerformanceObligationsDetails"/>
  <link:definitionLink xlink:role="http://www.paylocity.com/role/RevenueRemainingPerformanceObligationsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_78c9d17a-e285-4966-8a52-89ec470dcb48" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_3b86f71d-7193-4abf-ba29-09e1fd6e7161" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_78c9d17a-e285-4966-8a52-89ec470dcb48" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_3b86f71d-7193-4abf-ba29-09e1fd6e7161" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_9e242bbb-67b6-474d-8b70-a4d53c964382" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_3b86f71d-7193-4abf-ba29-09e1fd6e7161" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_9e242bbb-67b6-474d-8b70-a4d53c964382" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuePracticalExpedientAbstract_5897ad8b-4011-4826-ba4f-aa1c66930724" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenuePracticalExpedientAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_78c9d17a-e285-4966-8a52-89ec470dcb48" xlink:to="loc_us-gaap_RevenuePracticalExpedientAbstract_5897ad8b-4011-4826-ba4f-aa1c66930724" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligation_30c542ac-ffa0-400c-8275-f56af4986be3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueRemainingPerformanceObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuePracticalExpedientAbstract_5897ad8b-4011-4826-ba4f-aa1c66930724" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligation_30c542ac-ffa0-400c-8275-f56af4986be3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_2dcf59e1-c4cb-4216-a77a-cf6cdde7f5a7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuePracticalExpedientAbstract_5897ad8b-4011-4826-ba4f-aa1c66930724" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_2dcf59e1-c4cb-4216-a77a-cf6cdde7f5a7" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.paylocity.com/role/RevenueRemainingPerformanceObligationsDetails_1" xlink:type="simple" xlink:href="pcty-20251231.xsd#RevenueRemainingPerformanceObligationsDetails_1"/>
  <link:definitionLink xlink:role="http://www.paylocity.com/role/RevenueRemainingPerformanceObligationsDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_78c9d17a-e285-4966-8a52-89ec470dcb48" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_3b86f71d-7193-4abf-ba29-09e1fd6e7161" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_78c9d17a-e285-4966-8a52-89ec470dcb48" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_3b86f71d-7193-4abf-ba29-09e1fd6e7161" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuePracticalExpedientAbstract_5897ad8b-4011-4826-ba4f-aa1c66930724" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenuePracticalExpedientAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_78c9d17a-e285-4966-8a52-89ec470dcb48" xlink:to="loc_us-gaap_RevenuePracticalExpedientAbstract_5897ad8b-4011-4826-ba4f-aa1c66930724" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligation_30c542ac-ffa0-400c-8275-f56af4986be3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueRemainingPerformanceObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuePracticalExpedientAbstract_5897ad8b-4011-4826-ba4f-aa1c66930724" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligation_30c542ac-ffa0-400c-8275-f56af4986be3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_2dcf59e1-c4cb-4216-a77a-cf6cdde7f5a7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuePracticalExpedientAbstract_5897ad8b-4011-4826-ba4f-aa1c66930724" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_2dcf59e1-c4cb-4216-a77a-cf6cdde7f5a7" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.paylocity.com/role/BusinessCombinationsDetails" xlink:type="simple" xlink:href="pcty-20251231.xsd#BusinessCombinationsDetails"/>
  <link:definitionLink xlink:role="http://www.paylocity.com/role/BusinessCombinationsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_89c20810-ab6c-42c4-a11e-545e6c5d25ab" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_462b7876-d5d9-49f3-87f1-a479e10e4625" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_89c20810-ab6c-42c4-a11e-545e6c5d25ab" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_462b7876-d5d9-49f3-87f1-a479e10e4625" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_7a396c78-4336-4093-bdf6-7dbebd9e0600" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_462b7876-d5d9-49f3-87f1-a479e10e4625" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_7a396c78-4336-4093-bdf6-7dbebd9e0600" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_7a396c78-4336-4093-bdf6-7dbebd9e0600_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_7a396c78-4336-4093-bdf6-7dbebd9e0600" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_7a396c78-4336-4093-bdf6-7dbebd9e0600_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_f6677216-8146-4afe-9863-863d8d5bee12" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_7a396c78-4336-4093-bdf6-7dbebd9e0600" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_f6677216-8146-4afe-9863-863d8d5bee12" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_AirbaseInc.Member_2f92234b-2c7d-40ef-b358-17780e480a49" xlink:href="pcty-20251231.xsd#pcty_AirbaseInc.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_f6677216-8146-4afe-9863-863d8d5bee12" xlink:to="loc_pcty_AirbaseInc.Member_2f92234b-2c7d-40ef-b358-17780e480a49" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_0f99d8e8-8f2a-4c70-996b-79bd0e70106d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_462b7876-d5d9-49f3-87f1-a479e10e4625" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_0f99d8e8-8f2a-4c70-996b-79bd0e70106d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_0f99d8e8-8f2a-4c70-996b-79bd0e70106d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_0f99d8e8-8f2a-4c70-996b-79bd0e70106d" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_0f99d8e8-8f2a-4c70-996b-79bd0e70106d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_66990af5-c8ed-4f8d-9241-63191257fb2b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_0f99d8e8-8f2a-4c70-996b-79bd0e70106d" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_66990af5-c8ed-4f8d-9241-63191257fb2b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_ProprietaryTechnologyMember_18b84dc4-c895-4426-91fb-eb4333a90dcc" xlink:href="pcty-20251231.xsd#pcty_ProprietaryTechnologyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_66990af5-c8ed-4f8d-9241-63191257fb2b" xlink:to="loc_pcty_ProprietaryTechnologyMember_18b84dc4-c895-4426-91fb-eb4333a90dcc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember_0ba1288a-8f62-4a00-906d-2c6b2023cdb1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CustomerRelationshipsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_66990af5-c8ed-4f8d-9241-63191257fb2b" xlink:to="loc_us-gaap_CustomerRelationshipsMember_0ba1288a-8f62-4a00-906d-2c6b2023cdb1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncompeteAgreementsMember_eb0945c8-7ece-4f2c-93d0-82a887a1cae5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NoncompeteAgreementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_66990af5-c8ed-4f8d-9241-63191257fb2b" xlink:to="loc_us-gaap_NoncompeteAgreementsMember_eb0945c8-7ece-4f2c-93d0-82a887a1cae5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeNamesMember_dec8b063-001c-4d8e-9266-81f223f6ddfa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TradeNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_66990af5-c8ed-4f8d-9241-63191257fb2b" xlink:to="loc_us-gaap_TradeNamesMember_dec8b063-001c-4d8e-9266-81f223f6ddfa" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_b6c9d277-ef6e-4ecf-9dc4-c1ed22252b39" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_89c20810-ab6c-42c4-a11e-545e6c5d25ab" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_b6c9d277-ef6e-4ecf-9dc4-c1ed22252b39" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_b045f295-1ab3-4482-94a7-c14a01e4b5da" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_89c20810-ab6c-42c4-a11e-545e6c5d25ab" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_b045f295-1ab3-4482-94a7-c14a01e4b5da" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFundsHeldForClients_08d2ef6d-ab6d-4cc5-9702-a587b28300bd" xlink:href="pcty-20251231.xsd#pcty_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFundsHeldForClients"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_89c20810-ab6c-42c4-a11e-545e6c5d25ab" xlink:to="loc_pcty_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFundsHeldForClients_08d2ef6d-ab6d-4cc5-9702-a587b28300bd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_8ed1005e-6043-4729-8e8f-f26c70f43ee6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_89c20810-ab6c-42c4-a11e-545e6c5d25ab" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_8ed1005e-6043-4729-8e8f-f26c70f43ee6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_59a311f9-4576-4ab3-b4e9-0fae69dabc2f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_89c20810-ab6c-42c4-a11e-545e6c5d25ab" xlink:to="loc_us-gaap_Goodwill_59a311f9-4576-4ab3-b4e9-0fae69dabc2f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther_9748954a-f841-49eb-9be5-29eb2b0f4b3f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_89c20810-ab6c-42c4-a11e-545e6c5d25ab" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther_9748954a-f841-49eb-9be5-29eb2b0f4b3f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedClientFundObligations_620d44f9-483a-4d35-8e48-93c624c306de" xlink:href="pcty-20251231.xsd#pcty_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedClientFundObligations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_89c20810-ab6c-42c4-a11e-545e6c5d25ab" xlink:to="loc_pcty_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedClientFundObligations_620d44f9-483a-4d35-8e48-93c624c306de" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities_3ed3d7f3-d67e-4754-889d-ec0a1641b859" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_89c20810-ab6c-42c4-a11e-545e6c5d25ab" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities_3ed3d7f3-d67e-4754-889d-ec0a1641b859" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_437eec28-1075-4629-b39a-a147c3bee1eb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_89c20810-ab6c-42c4-a11e-545e6c5d25ab" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_437eec28-1075-4629-b39a-a147c3bee1eb" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.paylocity.com/role/BusinessCombinationsUnauditedProFormaFinancialInformationAirbaseDetails" xlink:type="simple" xlink:href="pcty-20251231.xsd#BusinessCombinationsUnauditedProFormaFinancialInformationAirbaseDetails"/>
  <link:definitionLink xlink:role="http://www.paylocity.com/role/BusinessCombinationsUnauditedProFormaFinancialInformationAirbaseDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_02ddf20d-1b45-4544-a2ae-5f95f636d319" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionProFormaInformationNonrecurringAdjustmentsTable_1c60d61b-fb0a-4a28-a6fc-884d5796d22b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionProFormaInformationNonrecurringAdjustmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_02ddf20d-1b45-4544-a2ae-5f95f636d319" xlink:to="loc_us-gaap_BusinessAcquisitionProFormaInformationNonrecurringAdjustmentsTable_1c60d61b-fb0a-4a28-a6fc-884d5796d22b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_256a5429-bf59-4f39-85c8-a23277b6240f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_BusinessAcquisitionProFormaInformationNonrecurringAdjustmentsTable_1c60d61b-fb0a-4a28-a6fc-884d5796d22b" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_256a5429-bf59-4f39-85c8-a23277b6240f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_256a5429-bf59-4f39-85c8-a23277b6240f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_256a5429-bf59-4f39-85c8-a23277b6240f" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_256a5429-bf59-4f39-85c8-a23277b6240f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_b8db7102-10bf-4ecd-8da7-869c48493f1f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_256a5429-bf59-4f39-85c8-a23277b6240f" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_b8db7102-10bf-4ecd-8da7-869c48493f1f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_AirbaseInc.Member_c066f25b-b6e9-4065-b06d-4f5ad992cf76" xlink:href="pcty-20251231.xsd#pcty_AirbaseInc.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_b8db7102-10bf-4ecd-8da7-869c48493f1f" xlink:to="loc_pcty_AirbaseInc.Member_c066f25b-b6e9-4065-b06d-4f5ad992cf76" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.paylocity.com/role/BalanceSheetInformationAllowanceforCreditLossesRelatedtoAccountsReceivableCapitalizedInternalUseSoftwareandPropertyPlantandEquipmentDetails" xlink:type="simple" xlink:href="pcty-20251231.xsd#BalanceSheetInformationAllowanceforCreditLossesRelatedtoAccountsReceivableCapitalizedInternalUseSoftwareandPropertyPlantandEquipmentDetails"/>
  <link:definitionLink xlink:role="http://www.paylocity.com/role/BalanceSheetInformationAllowanceforCreditLossesRelatedtoAccountsReceivableCapitalizedInternalUseSoftwareandPropertyPlantandEquipmentDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_aa15e7c4-aae9-4f64-a2ef-a6e6e61f9ade" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_fde4c939-e14c-4b98-9a62-05a57f1e1efd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_aa15e7c4-aae9-4f64-a2ef-a6e6e61f9ade" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_fde4c939-e14c-4b98-9a62-05a57f1e1efd" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_5beda739-c6f7-42f7-baed-b4e5d90f379d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_fde4c939-e14c-4b98-9a62-05a57f1e1efd" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_5beda739-c6f7-42f7-baed-b4e5d90f379d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_5beda739-c6f7-42f7-baed-b4e5d90f379d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_5beda739-c6f7-42f7-baed-b4e5d90f379d" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_5beda739-c6f7-42f7-baed-b4e5d90f379d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_a734175b-3e30-4103-851e-901b16112e85" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_5beda739-c6f7-42f7-baed-b4e5d90f379d" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_a734175b-3e30-4103-851e-901b16112e85" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OfficeEquipmentMember_a8c55121-c6fa-4cd0-8316-dd043ac4225b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OfficeEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_a734175b-3e30-4103-851e-901b16112e85" xlink:to="loc_us-gaap_OfficeEquipmentMember_a8c55121-c6fa-4cd0-8316-dd043ac4225b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComputerEquipmentMember_47944ba0-22a9-4813-a517-cfa101575748" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ComputerEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_a734175b-3e30-4103-851e-901b16112e85" xlink:to="loc_us-gaap_ComputerEquipmentMember_47944ba0-22a9-4813-a517-cfa101575748" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FurnitureAndFixturesMember_7c2287d9-a9c1-44ec-b375-9af0c1bee624" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FurnitureAndFixturesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_a734175b-3e30-4103-851e-901b16112e85" xlink:to="loc_us-gaap_FurnitureAndFixturesMember_7c2287d9-a9c1-44ec-b375-9af0c1bee624" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SoftwareAndSoftwareDevelopmentCostsMember_adc3e518-01a7-4935-8821-97d67fac70f0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SoftwareAndSoftwareDevelopmentCostsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_a734175b-3e30-4103-851e-901b16112e85" xlink:to="loc_us-gaap_SoftwareAndSoftwareDevelopmentCostsMember_adc3e518-01a7-4935-8821-97d67fac70f0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseholdImprovementsMember_18272b8a-9d62-4898-a034-7084f1b6e5e9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LeaseholdImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_a734175b-3e30-4103-851e-901b16112e85" xlink:to="loc_us-gaap_LeaseholdImprovementsMember_18272b8a-9d62-4898-a034-7084f1b6e5e9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_TimeClocksRentedByClientsMember_083147ce-ef4c-491d-b3cb-6d0dba0e2e68" xlink:href="pcty-20251231.xsd#pcty_TimeClocksRentedByClientsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_a734175b-3e30-4103-851e-901b16112e85" xlink:to="loc_pcty_TimeClocksRentedByClientsMember_083147ce-ef4c-491d-b3cb-6d0dba0e2e68" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_a2387122-cdf8-4186-aca3-ca3356f47d72" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_fde4c939-e14c-4b98-9a62-05a57f1e1efd" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_a2387122-cdf8-4186-aca3-ca3356f47d72" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_a2387122-cdf8-4186-aca3-ca3356f47d72_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_a2387122-cdf8-4186-aca3-ca3356f47d72" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_a2387122-cdf8-4186-aca3-ca3356f47d72_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_7f9abc20-99b3-4b77-8aef-cc7dcc81e2fc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_a2387122-cdf8-4186-aca3-ca3356f47d72" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_7f9abc20-99b3-4b77-8aef-cc7dcc81e2fc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfSalesMember_3b00cac3-e81d-4cae-acbb-1e77875150d5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostOfSalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_7f9abc20-99b3-4b77-8aef-cc7dcc81e2fc" xlink:to="loc_us-gaap_CostOfSalesMember_3b00cac3-e81d-4cae-acbb-1e77875150d5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward_0420f61a-78ce-4edb-b0b2-aec3ee932742" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_aa15e7c4-aae9-4f64-a2ef-a6e6e61f9ade" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward_0420f61a-78ce-4edb-b0b2-aec3ee932742" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivable_fc91e39e-90ee-475f-87f2-d59c1cde3bf2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward_0420f61a-78ce-4edb-b0b2-aec3ee932742" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivable_fc91e39e-90ee-475f-87f2-d59c1cde3bf2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProvisionForDoubtfulAccounts_e303baa5-e10f-4063-8424-f58712125e6e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProvisionForDoubtfulAccounts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward_0420f61a-78ce-4edb-b0b2-aec3ee932742" xlink:to="loc_us-gaap_ProvisionForDoubtfulAccounts_e303baa5-e10f-4063-8424-f58712125e6e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs_bac661fa-9c37-4c2c-bde2-b82afa60f499" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward_0420f61a-78ce-4edb-b0b2-aec3ee932742" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs_bac661fa-9c37-4c2c-bde2-b82afa60f499" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivable_d10ceb51-98e6-43f2-b453-d1c6367fcd24" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivable"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedComputerSoftwareNetAbstract_b8de275a-f3b9-4d8f-b761-5c0a172e2129" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CapitalizedComputerSoftwareNetAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_aa15e7c4-aae9-4f64-a2ef-a6e6e61f9ade" xlink:to="loc_us-gaap_CapitalizedComputerSoftwareNetAbstract_b8de275a-f3b9-4d8f-b761-5c0a172e2129" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedComputerSoftwareGross_9ca3ed16-08fa-44aa-adfb-a550aff1c808" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CapitalizedComputerSoftwareGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalizedComputerSoftwareNetAbstract_b8de275a-f3b9-4d8f-b761-5c0a172e2129" xlink:to="loc_us-gaap_CapitalizedComputerSoftwareGross_9ca3ed16-08fa-44aa-adfb-a550aff1c808" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedComputerSoftwareAccumulatedAmortization_ed9e58a4-8627-47ff-84f2-7a9ed4a60ac0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CapitalizedComputerSoftwareAccumulatedAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalizedComputerSoftwareNetAbstract_b8de275a-f3b9-4d8f-b761-5c0a172e2129" xlink:to="loc_us-gaap_CapitalizedComputerSoftwareAccumulatedAmortization_ed9e58a4-8627-47ff-84f2-7a9ed4a60ac0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedComputerSoftwareNet_83c87716-b029-4e81-92fe-90928a2015b2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CapitalizedComputerSoftwareNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalizedComputerSoftwareNetAbstract_b8de275a-f3b9-4d8f-b761-5c0a172e2129" xlink:to="loc_us-gaap_CapitalizedComputerSoftwareNet_83c87716-b029-4e81-92fe-90928a2015b2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedComputerSoftwareAmortization1_c835df3f-27fb-4635-9519-d01dbc9bdf99" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CapitalizedComputerSoftwareAmortization1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalizedComputerSoftwareNetAbstract_b8de275a-f3b9-4d8f-b761-5c0a172e2129" xlink:to="loc_us-gaap_CapitalizedComputerSoftwareAmortization1_c835df3f-27fb-4635-9519-d01dbc9bdf99" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNetByTypeAbstract_4801414c-21de-4ef3-9dc9-7eb92c961f29" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentNetByTypeAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_aa15e7c4-aae9-4f64-a2ef-a6e6e61f9ade" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNetByTypeAbstract_4801414c-21de-4ef3-9dc9-7eb92c961f29" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_f05130e3-3985-4492-98a5-db2c14c8e25b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNetByTypeAbstract_4801414c-21de-4ef3-9dc9-7eb92c961f29" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_f05130e3-3985-4492-98a5-db2c14c8e25b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_98a51921-130b-4c9e-a1c1-07988398069f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNetByTypeAbstract_4801414c-21de-4ef3-9dc9-7eb92c961f29" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_98a51921-130b-4c9e-a1c1-07988398069f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_572dfcec-00ef-4ec9-962d-d58e7c81ab07" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNetByTypeAbstract_4801414c-21de-4ef3-9dc9-7eb92c961f29" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_572dfcec-00ef-4ec9-962d-d58e7c81ab07" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Depreciation_a927840c-b144-4ec6-a4f9-b8018bf64d32" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Depreciation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_aa15e7c4-aae9-4f64-a2ef-a6e6e61f9ade" xlink:to="loc_us-gaap_Depreciation_a927840c-b144-4ec6-a4f9-b8018bf64d32" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.paylocity.com/role/BalanceSheetInformationGoodwillIntangibleAssetsandAccruedExpensesDetails" xlink:type="simple" xlink:href="pcty-20251231.xsd#BalanceSheetInformationGoodwillIntangibleAssetsandAccruedExpensesDetails"/>
  <link:definitionLink xlink:role="http://www.paylocity.com/role/BalanceSheetInformationGoodwillIntangibleAssetsandAccruedExpensesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_594f6647-69a8-4103-89f3-169729bdab88" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAcquiredFiniteLivedIntangibleAssetByMajorClassTable_9d63ce93-4d7b-43f2-a803-81d8a74299f3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfAcquiredFiniteLivedIntangibleAssetByMajorClassTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_594f6647-69a8-4103-89f3-169729bdab88" xlink:to="loc_us-gaap_ScheduleOfAcquiredFiniteLivedIntangibleAssetByMajorClassTable_9d63ce93-4d7b-43f2-a803-81d8a74299f3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_1c4674b5-a8e2-49c7-b626-46a5e9526676" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAcquiredFiniteLivedIntangibleAssetByMajorClassTable_9d63ce93-4d7b-43f2-a803-81d8a74299f3" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_1c4674b5-a8e2-49c7-b626-46a5e9526676" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_1c4674b5-a8e2-49c7-b626-46a5e9526676_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_1c4674b5-a8e2-49c7-b626-46a5e9526676" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_1c4674b5-a8e2-49c7-b626-46a5e9526676_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_cf28ed82-18ef-4fa7-aa04-517eedef2bf3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_1c4674b5-a8e2-49c7-b626-46a5e9526676" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_cf28ed82-18ef-4fa7-aa04-517eedef2bf3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_ProprietaryTechnologyMember_e904a280-63de-48e7-bc8e-4c4b156a9157" xlink:href="pcty-20251231.xsd#pcty_ProprietaryTechnologyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_cf28ed82-18ef-4fa7-aa04-517eedef2bf3" xlink:to="loc_pcty_ProprietaryTechnologyMember_e904a280-63de-48e7-bc8e-4c4b156a9157" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember_e85edba1-287f-4cbd-9ad6-3c31b50bb039" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CustomerRelationshipsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_cf28ed82-18ef-4fa7-aa04-517eedef2bf3" xlink:to="loc_us-gaap_CustomerRelationshipsMember_e85edba1-287f-4cbd-9ad6-3c31b50bb039" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncompeteAgreementsMember_24004e6e-3b04-45e7-885f-1468151db7d0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NoncompeteAgreementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_cf28ed82-18ef-4fa7-aa04-517eedef2bf3" xlink:to="loc_us-gaap_NoncompeteAgreementsMember_24004e6e-3b04-45e7-885f-1468151db7d0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeNamesMember_1c81b441-f938-4dcc-aa8f-d52a0dbabd11" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TradeNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_cf28ed82-18ef-4fa7-aa04-517eedef2bf3" xlink:to="loc_us-gaap_TradeNamesMember_1c81b441-f938-4dcc-aa8f-d52a0dbabd11" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillRollForward_5341ba7c-be78-4c79-bdf4-8f9206458c53" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GoodwillRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_594f6647-69a8-4103-89f3-169729bdab88" xlink:to="loc_us-gaap_GoodwillRollForward_5341ba7c-be78-4c79-bdf4-8f9206458c53" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_420912dc-8923-4b09-9b73-12522a6adaf2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_5341ba7c-be78-4c79-bdf4-8f9206458c53" xlink:to="loc_us-gaap_Goodwill_420912dc-8923-4b09-9b73-12522a6adaf2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillPurchaseAccountingAdjustments_89355e84-7913-4cdc-bccd-0d01c346b681" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GoodwillPurchaseAccountingAdjustments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_5341ba7c-be78-4c79-bdf4-8f9206458c53" xlink:to="loc_us-gaap_GoodwillPurchaseAccountingAdjustments_89355e84-7913-4cdc-bccd-0d01c346b681" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_2e83ca63-d35c-4407-bd03-68794db612c2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Goodwill"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_895a4683-a89f-4af7-aa43-3c18489d40be" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsNetAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_594f6647-69a8-4103-89f3-169729bdab88" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_895a4683-a89f-4af7-aa43-3c18489d40be" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_b0eadef9-b95f-4f8e-8af7-11b933f916b6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_895a4683-a89f-4af7-aa43-3c18489d40be" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_b0eadef9-b95f-4f8e-8af7-11b933f916b6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_a26e0cca-d6b5-493a-98c4-c0dc0bea6817" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_895a4683-a89f-4af7-aa43-3c18489d40be" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_a26e0cca-d6b5-493a-98c4-c0dc0bea6817" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_896fecbe-aac1-43a9-82a5-2a04582b63f9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_895a4683-a89f-4af7-aa43-3c18489d40be" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_896fecbe-aac1-43a9-82a5-2a04582b63f9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_82262f5d-0965-464f-a1f6-2d78d7996f2f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_895a4683-a89f-4af7-aa43-3c18489d40be" xlink:to="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_82262f5d-0965-464f-a1f6-2d78d7996f2f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_badf8db8-7a85-4666-bcbe-90f64f9d19d4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AmortizationOfIntangibleAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_895a4683-a89f-4af7-aa43-3c18489d40be" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_badf8db8-7a85-4666-bcbe-90f64f9d19d4" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_863ef1c1-7a28-4856-be91-5497a56ddfb9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_594f6647-69a8-4103-89f3-169729bdab88" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_863ef1c1-7a28-4856-be91-5497a56ddfb9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_14dc02c9-d0ad-4b25-8905-5665bc2f722f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_863ef1c1-7a28-4856-be91-5497a56ddfb9" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_14dc02c9-d0ad-4b25-8905-5665bc2f722f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_124a96f3-1ada-48ff-8293-ebaece864bcc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_863ef1c1-7a28-4856-be91-5497a56ddfb9" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_124a96f3-1ada-48ff-8293-ebaece864bcc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_7469df54-5626-4acc-92c4-fe280da0f0bb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_863ef1c1-7a28-4856-be91-5497a56ddfb9" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_7469df54-5626-4acc-92c4-fe280da0f0bb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_c98ab666-4073-4b2d-997d-6bb5f584ff70" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_863ef1c1-7a28-4856-be91-5497a56ddfb9" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_c98ab666-4073-4b2d-997d-6bb5f584ff70" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_ed5870be-8ad4-4870-8279-4a117307603a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_863ef1c1-7a28-4856-be91-5497a56ddfb9" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_ed5870be-8ad4-4870-8279-4a117307603a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour_a8e0cca7-425f-4f15-8529-aafd4ee4ee6e" xlink:href="pcty-20251231.xsd#pcty_FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_863ef1c1-7a28-4856-be91-5497a56ddfb9" xlink:to="loc_pcty_FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour_a8e0cca7-425f-4f15-8529-aafd4ee4ee6e" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_bf68865f-65f5-46f4-9db1-e3a45ed01aaf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrentAbstract_99c1f94f-86e5-4971-a4a6-a4c56941ae1e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccruedLiabilitiesCurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_594f6647-69a8-4103-89f3-169729bdab88" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrentAbstract_99c1f94f-86e5-4971-a4a6-a4c56941ae1e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_9bab227b-d0db-4b75-adbf-1a5d345b0c0d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrentAbstract_99c1f94f-86e5-4971-a4a6-a4c56941ae1e" xlink:to="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_9bab227b-d0db-4b75-adbf-1a5d345b0c0d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_1c2cf39b-a639-4d3e-8bc6-6e6138b9ba2f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrentAbstract_99c1f94f-86e5-4971-a4a6-a4c56941ae1e" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_1c2cf39b-a639-4d3e-8bc6-6e6138b9ba2f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCurrent_800bc5bc-77a9-4232-8848-6a7a52ad8688" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractWithCustomerLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrentAbstract_99c1f94f-86e5-4971-a4a6-a4c56941ae1e" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityCurrent_800bc5bc-77a9-4232-8848-6a7a52ad8688" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAccruedLiabilitiesCurrent_be5ce34f-ba15-4d02-b131-b2298fbbaf67" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAccruedLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrentAbstract_99c1f94f-86e5-4971-a4a6-a4c56941ae1e" xlink:to="loc_us-gaap_OtherAccruedLiabilitiesCurrent_be5ce34f-ba15-4d02-b131-b2298fbbaf67" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_3e9ab76f-b9d5-4f5b-bcb6-7df4da53b029" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccruedLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrentAbstract_99c1f94f-86e5-4971-a4a6-a4c56941ae1e" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent_3e9ab76f-b9d5-4f5b-bcb6-7df4da53b029" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.paylocity.com/role/CashandCashEquivalentsandFundsHeldForClientsReconciliationDetails" xlink:type="simple" xlink:href="pcty-20251231.xsd#CashandCashEquivalentsandFundsHeldForClientsReconciliationDetails"/>
  <link:definitionLink xlink:role="http://www.paylocity.com/role/CashandCashEquivalentsandFundsHeldForClientsReconciliationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_pcty_FundsHeldForClientsAndCorporateInvestmentsLineItems_84011144-33a1-4522-b3e8-e86b49daadc1" xlink:href="pcty-20251231.xsd#pcty_FundsHeldForClientsAndCorporateInvestmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_ScheduleOfFundsHeldForClientsAndCorporateInvestmentsTable_7b0735d2-3a15-4bae-b2e5-1668caf434ac" xlink:href="pcty-20251231.xsd#pcty_ScheduleOfFundsHeldForClientsAndCorporateInvestmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_pcty_FundsHeldForClientsAndCorporateInvestmentsLineItems_84011144-33a1-4522-b3e8-e86b49daadc1" xlink:to="loc_pcty_ScheduleOfFundsHeldForClientsAndCorporateInvestmentsTable_7b0735d2-3a15-4bae-b2e5-1668caf434ac" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_348f0a2e-e6e7-4f26-aaae-d10a01c49c3b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_pcty_ScheduleOfFundsHeldForClientsAndCorporateInvestmentsTable_7b0735d2-3a15-4bae-b2e5-1668caf434ac" xlink:to="loc_us-gaap_FinancialInstrumentAxis_348f0a2e-e6e7-4f26-aaae-d10a01c49c3b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_348f0a2e-e6e7-4f26-aaae-d10a01c49c3b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_348f0a2e-e6e7-4f26-aaae-d10a01c49c3b" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_348f0a2e-e6e7-4f26-aaae-d10a01c49c3b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_033a92f0-0b90-4367-afce-7fbf0bfdbda2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_348f0a2e-e6e7-4f26-aaae-d10a01c49c3b" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_033a92f0-0b90-4367-afce-7fbf0bfdbda2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_8aceb0f3-e824-434a-b7dd-3edd486807c6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_033a92f0-0b90-4367-afce-7fbf0bfdbda2" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_8aceb0f3-e824-434a-b7dd-3edd486807c6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetBackedSecuritiesMember_17819dbb-e57e-4987-bc82-2d59d92d1b6f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_033a92f0-0b90-4367-afce-7fbf0bfdbda2" xlink:to="loc_us-gaap_AssetBackedSecuritiesMember_17819dbb-e57e-4987-bc82-2d59d92d1b6f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CertificatesOfDepositMember_1d6f819d-ac80-4afa-a2e0-c0f8c0d4cf2a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CertificatesOfDepositMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_033a92f0-0b90-4367-afce-7fbf0bfdbda2" xlink:to="loc_us-gaap_CertificatesOfDepositMember_1d6f819d-ac80-4afa-a2e0-c0f8c0d4cf2a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USTreasurySecuritiesMember_adda32b1-6857-4e4f-ba29-e390f3145549" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_USTreasurySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_033a92f0-0b90-4367-afce-7fbf0bfdbda2" xlink:to="loc_us-gaap_USTreasurySecuritiesMember_adda32b1-6857-4e4f-ba29-e390f3145549" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaperNotIncludedWithCashAndCashEquivalentsMember_a1edeb54-38dd-4dca-9f13-a269ff1e65f7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialPaperNotIncludedWithCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_033a92f0-0b90-4367-afce-7fbf0bfdbda2" xlink:to="loc_us-gaap_CommercialPaperNotIncludedWithCashAndCashEquivalentsMember_a1edeb54-38dd-4dca-9f13-a269ff1e65f7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherDebtSecuritiesMember_8a0610a3-7c96-415e-86db-11f8a9138768" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_033a92f0-0b90-4367-afce-7fbf0bfdbda2" xlink:to="loc_us-gaap_OtherDebtSecuritiesMember_8a0610a3-7c96-415e-86db-11f8a9138768" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_CashAndCashEquivalentsAmortizedCost_91774696-9e27-4598-abbe-c332a204bb8d" xlink:href="pcty-20251231.xsd#pcty_CashAndCashEquivalentsAmortizedCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_pcty_FundsHeldForClientsAndCorporateInvestmentsLineItems_84011144-33a1-4522-b3e8-e86b49daadc1" xlink:to="loc_pcty_CashAndCashEquivalentsAmortizedCost_91774696-9e27-4598-abbe-c332a204bb8d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_CashAndCashEquivalentsAccumulatedGrossUnrealizedGainBeforeTax_5cab565b-dd5f-473e-ac72-5e457d2c15fd" xlink:href="pcty-20251231.xsd#pcty_CashAndCashEquivalentsAccumulatedGrossUnrealizedGainBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_pcty_FundsHeldForClientsAndCorporateInvestmentsLineItems_84011144-33a1-4522-b3e8-e86b49daadc1" xlink:to="loc_pcty_CashAndCashEquivalentsAccumulatedGrossUnrealizedGainBeforeTax_5cab565b-dd5f-473e-ac72-5e457d2c15fd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_CashAndCashEquivalentsAccumulatedGrossUnrealizedLossBeforeTax_93281fe8-cf34-4340-9f71-f2cac7d29f8b" xlink:href="pcty-20251231.xsd#pcty_CashAndCashEquivalentsAccumulatedGrossUnrealizedLossBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_pcty_FundsHeldForClientsAndCorporateInvestmentsLineItems_84011144-33a1-4522-b3e8-e86b49daadc1" xlink:to="loc_pcty_CashAndCashEquivalentsAccumulatedGrossUnrealizedLossBeforeTax_93281fe8-cf34-4340-9f71-f2cac7d29f8b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_6150f401-932a-4473-bc0e-d614cb43f575" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_pcty_FundsHeldForClientsAndCorporateInvestmentsLineItems_84011144-33a1-4522-b3e8-e86b49daadc1" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_6150f401-932a-4473-bc0e-d614cb43f575" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_FundsHeldForClientsCashAndCashEquivalentsAmortizedCost_cb69a5d6-16bc-49e7-867e-692679991ac2" xlink:href="pcty-20251231.xsd#pcty_FundsHeldForClientsCashAndCashEquivalentsAmortizedCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_pcty_FundsHeldForClientsAndCorporateInvestmentsLineItems_84011144-33a1-4522-b3e8-e86b49daadc1" xlink:to="loc_pcty_FundsHeldForClientsCashAndCashEquivalentsAmortizedCost_cb69a5d6-16bc-49e7-867e-692679991ac2" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_FundsHeldForClientsCashAndCashEquivalentsAccumulatedGrossUnrealizedGainBeforeTax_694170a4-7a16-4562-a450-156a065dd43a" xlink:href="pcty-20251231.xsd#pcty_FundsHeldForClientsCashAndCashEquivalentsAccumulatedGrossUnrealizedGainBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_pcty_FundsHeldForClientsAndCorporateInvestmentsLineItems_84011144-33a1-4522-b3e8-e86b49daadc1" xlink:to="loc_pcty_FundsHeldForClientsCashAndCashEquivalentsAccumulatedGrossUnrealizedGainBeforeTax_694170a4-7a16-4562-a450-156a065dd43a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_FundsHeldForClientsCashAndCashEquivalentsAccumulatedGrossUnrealizedLossBeforeTax_5ba5c9c0-4610-4240-b7fd-d9e0845b4e3c" xlink:href="pcty-20251231.xsd#pcty_FundsHeldForClientsCashAndCashEquivalentsAccumulatedGrossUnrealizedLossBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_pcty_FundsHeldForClientsAndCorporateInvestmentsLineItems_84011144-33a1-4522-b3e8-e86b49daadc1" xlink:to="loc_pcty_FundsHeldForClientsCashAndCashEquivalentsAccumulatedGrossUnrealizedLossBeforeTax_5ba5c9c0-4610-4240-b7fd-d9e0845b4e3c" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_FundsHeldForClientsCashAndCashEquivalentsAtCarryingValue_4e42cf83-fbd8-45a3-b7c4-a9f8440dc43a" xlink:href="pcty-20251231.xsd#pcty_FundsHeldForClientsCashAndCashEquivalentsAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_pcty_FundsHeldForClientsAndCorporateInvestmentsLineItems_84011144-33a1-4522-b3e8-e86b49daadc1" xlink:to="loc_pcty_FundsHeldForClientsCashAndCashEquivalentsAtCarryingValue_4e42cf83-fbd8-45a3-b7c4-a9f8440dc43a" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesFairValueToAmortizedCostBasisAbstract_cfafa725-edd3-4d03-a388-d7b933ef8bc7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleSecuritiesFairValueToAmortizedCostBasisAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_pcty_FundsHeldForClientsAndCorporateInvestmentsLineItems_84011144-33a1-4522-b3e8-e86b49daadc1" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesFairValueToAmortizedCostBasisAbstract_cfafa725-edd3-4d03-a388-d7b933ef8bc7" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_122cf685-e594-43a7-bfc7-b7389c9f24e7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesFairValueToAmortizedCostBasisAbstract_cfafa725-edd3-4d03-a388-d7b933ef8bc7" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_122cf685-e594-43a7-bfc7-b7389c9f24e7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_e9982861-903e-4fdb-8549-6b27a53b8fb6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesFairValueToAmortizedCostBasisAbstract_cfafa725-edd3-4d03-a388-d7b933ef8bc7" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_e9982861-903e-4fdb-8549-6b27a53b8fb6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_b2e4525a-447a-4b54-b51c-f96a5f770b35" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesFairValueToAmortizedCostBasisAbstract_cfafa725-edd3-4d03-a388-d7b933ef8bc7" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_b2e4525a-447a-4b54-b51c-f96a5f770b35" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_1e497977-1d29-46ca-96a8-95dd2f7dd704" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesFairValueToAmortizedCostBasisAbstract_cfafa725-edd3-4d03-a388-d7b933ef8bc7" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_1e497977-1d29-46ca-96a8-95dd2f7dd704" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_InvestmentsAmortizedCost_5a5aa60f-4239-4ff3-8f73-979b95ecb500" xlink:href="pcty-20251231.xsd#pcty_InvestmentsAmortizedCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesFairValueToAmortizedCostBasisAbstract_cfafa725-edd3-4d03-a388-d7b933ef8bc7" xlink:to="loc_pcty_InvestmentsAmortizedCost_5a5aa60f-4239-4ff3-8f73-979b95ecb500" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_InvestmentsAccumulatedGrossUnrealizedGainBeforeTax_f6b19376-0afb-40bd-8c57-c371c8dd7d15" xlink:href="pcty-20251231.xsd#pcty_InvestmentsAccumulatedGrossUnrealizedGainBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesFairValueToAmortizedCostBasisAbstract_cfafa725-edd3-4d03-a388-d7b933ef8bc7" xlink:to="loc_pcty_InvestmentsAccumulatedGrossUnrealizedGainBeforeTax_f6b19376-0afb-40bd-8c57-c371c8dd7d15" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_InvestmentsAccumulatedGrossUnrealizedLossBeforeTax_39ee0c16-dd95-45cb-8d76-c2b3c29c2b44" xlink:href="pcty-20251231.xsd#pcty_InvestmentsAccumulatedGrossUnrealizedLossBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesFairValueToAmortizedCostBasisAbstract_cfafa725-edd3-4d03-a388-d7b933ef8bc7" xlink:to="loc_pcty_InvestmentsAccumulatedGrossUnrealizedLossBeforeTax_39ee0c16-dd95-45cb-8d76-c2b3c29c2b44" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Investments_1df24eb3-fdff-4fd4-918b-a08b88bc387f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Investments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesFairValueToAmortizedCostBasisAbstract_cfafa725-edd3-4d03-a388-d7b933ef8bc7" xlink:to="loc_us-gaap_Investments_1df24eb3-fdff-4fd4-918b-a08b88bc387f" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.paylocity.com/role/CashandCashEquivalentsandFundsHeldForClientsClassificationDetails" xlink:type="simple" xlink:href="pcty-20251231.xsd#CashandCashEquivalentsandFundsHeldForClientsClassificationDetails"/>
  <link:definitionLink xlink:role="http://www.paylocity.com/role/CashandCashEquivalentsandFundsHeldForClientsClassificationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_pcty_FundsHeldForClientsAndCorporateInvestmentsLineItems_b4d7cfc7-ae7b-4dd0-9069-ca4a388aa9ee" xlink:href="pcty-20251231.xsd#pcty_FundsHeldForClientsAndCorporateInvestmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_ScheduleOfFundsHeldForClientsAndCorporateInvestmentsTable_2c92f8fa-3f6b-41cb-83d4-38f760b0d793" xlink:href="pcty-20251231.xsd#pcty_ScheduleOfFundsHeldForClientsAndCorporateInvestmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_pcty_FundsHeldForClientsAndCorporateInvestmentsLineItems_b4d7cfc7-ae7b-4dd0-9069-ca4a388aa9ee" xlink:to="loc_pcty_ScheduleOfFundsHeldForClientsAndCorporateInvestmentsTable_2c92f8fa-3f6b-41cb-83d4-38f760b0d793" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_e002b4cd-f918-43b6-bd3c-87d7c6122b41" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_pcty_ScheduleOfFundsHeldForClientsAndCorporateInvestmentsTable_2c92f8fa-3f6b-41cb-83d4-38f760b0d793" xlink:to="loc_us-gaap_FinancialInstrumentAxis_e002b4cd-f918-43b6-bd3c-87d7c6122b41" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_e002b4cd-f918-43b6-bd3c-87d7c6122b41_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_e002b4cd-f918-43b6-bd3c-87d7c6122b41" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_e002b4cd-f918-43b6-bd3c-87d7c6122b41_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_23785e3f-22d2-4c74-8b21-85a211ecf19c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_e002b4cd-f918-43b6-bd3c-87d7c6122b41" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_23785e3f-22d2-4c74-8b21-85a211ecf19c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_ec576eb1-5411-487f-84a6-ba2517d1dafe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_23785e3f-22d2-4c74-8b21-85a211ecf19c" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_ec576eb1-5411-487f-84a6-ba2517d1dafe" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetBackedSecuritiesMember_fff567f0-b32f-40f8-b387-f0c6ea81e0cf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_23785e3f-22d2-4c74-8b21-85a211ecf19c" xlink:to="loc_us-gaap_AssetBackedSecuritiesMember_fff567f0-b32f-40f8-b387-f0c6ea81e0cf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CertificatesOfDepositMember_b71cba7b-eb8e-4e34-a93e-46bc3fecfc89" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CertificatesOfDepositMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_23785e3f-22d2-4c74-8b21-85a211ecf19c" xlink:to="loc_us-gaap_CertificatesOfDepositMember_b71cba7b-eb8e-4e34-a93e-46bc3fecfc89" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USTreasurySecuritiesMember_0ecfd0d3-9654-4d66-b568-617ad97e2708" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_USTreasurySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_23785e3f-22d2-4c74-8b21-85a211ecf19c" xlink:to="loc_us-gaap_USTreasurySecuritiesMember_0ecfd0d3-9654-4d66-b568-617ad97e2708" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaperNotIncludedWithCashAndCashEquivalentsMember_f37c733b-7c43-494d-ae69-813e53bd587a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialPaperNotIncludedWithCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_23785e3f-22d2-4c74-8b21-85a211ecf19c" xlink:to="loc_us-gaap_CommercialPaperNotIncludedWithCashAndCashEquivalentsMember_f37c733b-7c43-494d-ae69-813e53bd587a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherDebtSecuritiesMember_b3b2c1bd-2fc9-44b7-b2bc-1552a197bf83" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_23785e3f-22d2-4c74-8b21-85a211ecf19c" xlink:to="loc_us-gaap_OtherDebtSecuritiesMember_b3b2c1bd-2fc9-44b7-b2bc-1552a197bf83" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_5996566e-60d4-46f9-9d36-e2afb93bdb49" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_pcty_FundsHeldForClientsAndCorporateInvestmentsLineItems_b4d7cfc7-ae7b-4dd0-9069-ca4a388aa9ee" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_5996566e-60d4-46f9-9d36-e2afb93bdb49" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FundsHeldForClients_779f4f2d-48f1-4170-a7c5-ca6a25e3ee89" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FundsHeldForClients"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_pcty_FundsHeldForClientsAndCorporateInvestmentsLineItems_b4d7cfc7-ae7b-4dd0-9069-ca4a388aa9ee" xlink:to="loc_us-gaap_FundsHeldForClients_779f4f2d-48f1-4170-a7c5-ca6a25e3ee89" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Investments_f0bd45c7-9e41-44ac-a48c-0b5971200c56" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Investments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_pcty_FundsHeldForClientsAndCorporateInvestmentsLineItems_b4d7cfc7-ae7b-4dd0-9069-ca4a388aa9ee" xlink:to="loc_us-gaap_Investments_f0bd45c7-9e41-44ac-a48c-0b5971200c56" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_688d55f1-ecc4-49ae-ba34-648a82fcc410" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_pcty_FundsHeldForClientsAndCorporateInvestmentsLineItems_b4d7cfc7-ae7b-4dd0-9069-ca4a388aa9ee" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_688d55f1-ecc4-49ae-ba34-648a82fcc410" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months_4c64849b-47a4-4369-b229-fa61ab12ba2d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_pcty_FundsHeldForClientsAndCorporateInvestmentsLineItems_b4d7cfc7-ae7b-4dd0-9069-ca4a388aa9ee" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months_4c64849b-47a4-4369-b229-fa61ab12ba2d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_12f698cb-b41a-400d-b461-90023dc5d56d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_pcty_FundsHeldForClientsAndCorporateInvestmentsLineItems_b4d7cfc7-ae7b-4dd0-9069-ca4a388aa9ee" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_12f698cb-b41a-400d-b461-90023dc5d56d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger_d30d5c19-7936-4f1f-9caa-1260277173ee" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_pcty_FundsHeldForClientsAndCorporateInvestmentsLineItems_b4d7cfc7-ae7b-4dd0-9069-ca4a388aa9ee" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger_d30d5c19-7936-4f1f-9caa-1260277173ee" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_28839e93-c229-4d0c-bf3b-9fb38fbd3bf0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_pcty_FundsHeldForClientsAndCorporateInvestmentsLineItems_b4d7cfc7-ae7b-4dd0-9069-ca4a388aa9ee" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_28839e93-c229-4d0c-bf3b-9fb38fbd3bf0" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_55ffc398-5aa2-4539-a98b-1f007401f597" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_pcty_FundsHeldForClientsAndCorporateInvestmentsLineItems_b4d7cfc7-ae7b-4dd0-9069-ca4a388aa9ee" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_55ffc398-5aa2-4539-a98b-1f007401f597" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_CreditImpairmentLoss_4bfa30d5-52bd-4ba7-a7c0-4a5df733b063" xlink:href="pcty-20251231.xsd#pcty_CreditImpairmentLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_pcty_FundsHeldForClientsAndCorporateInvestmentsLineItems_b4d7cfc7-ae7b-4dd0-9069-ca4a388aa9ee" xlink:to="loc_pcty_CreditImpairmentLoss_4bfa30d5-52bd-4ba7-a7c0-4a5df733b063" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleRealizedGainLoss_1f4a5ff7-dea8-41fc-b18e-be20d9859d82" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleRealizedGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_pcty_FundsHeldForClientsAndCorporateInvestmentsLineItems_b4d7cfc7-ae7b-4dd0-9069-ca4a388aa9ee" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleRealizedGainLoss_1f4a5ff7-dea8-41fc-b18e-be20d9859d82" xlink:type="arc" order="10"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.paylocity.com/role/FairValueMeasurementDetails" xlink:type="simple" xlink:href="pcty-20251231.xsd#FairValueMeasurementDetails"/>
  <link:definitionLink xlink:role="http://www.paylocity.com/role/FairValueMeasurementDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_e97b18c9-e390-4a39-bb75-cce474126161" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_c35996d1-5ba8-401c-a9a1-56667c3aa507" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_e97b18c9-e390-4a39-bb75-cce474126161" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_c35996d1-5ba8-401c-a9a1-56667c3aa507" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_980b951f-0a51-4f30-b542-b054adc405c2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_c35996d1-5ba8-401c-a9a1-56667c3aa507" xlink:to="loc_us-gaap_FinancialInstrumentAxis_980b951f-0a51-4f30-b542-b054adc405c2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_980b951f-0a51-4f30-b542-b054adc405c2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_980b951f-0a51-4f30-b542-b054adc405c2" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_980b951f-0a51-4f30-b542-b054adc405c2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_70039de2-8476-44cf-8a0d-bdedf254aa3d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_980b951f-0a51-4f30-b542-b054adc405c2" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_70039de2-8476-44cf-8a0d-bdedf254aa3d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_49715249-302e-4503-bf09-9e01fa4c5c05" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_70039de2-8476-44cf-8a0d-bdedf254aa3d" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_49715249-302e-4503-bf09-9e01fa4c5c05" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetBackedSecuritiesMember_de7e06c7-83df-4dc4-ad17-d3bf7a1e9c25" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_70039de2-8476-44cf-8a0d-bdedf254aa3d" xlink:to="loc_us-gaap_AssetBackedSecuritiesMember_de7e06c7-83df-4dc4-ad17-d3bf7a1e9c25" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CertificatesOfDepositMember_7b5cccbc-8d14-4a05-97e5-235181b00fd0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CertificatesOfDepositMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_70039de2-8476-44cf-8a0d-bdedf254aa3d" xlink:to="loc_us-gaap_CertificatesOfDepositMember_7b5cccbc-8d14-4a05-97e5-235181b00fd0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USTreasurySecuritiesMember_bc5ec8a3-ded0-4451-b3c0-97b612d225c2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_USTreasurySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_70039de2-8476-44cf-8a0d-bdedf254aa3d" xlink:to="loc_us-gaap_USTreasurySecuritiesMember_bc5ec8a3-ded0-4451-b3c0-97b612d225c2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaperNotIncludedWithCashAndCashEquivalentsMember_25723ad2-c898-4c75-8745-9c9f0ef403df" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialPaperNotIncludedWithCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_70039de2-8476-44cf-8a0d-bdedf254aa3d" xlink:to="loc_us-gaap_CommercialPaperNotIncludedWithCashAndCashEquivalentsMember_25723ad2-c898-4c75-8745-9c9f0ef403df" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherDebtSecuritiesMember_5fdb0582-e112-43f6-a026-f585c6fa45b4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_70039de2-8476-44cf-8a0d-bdedf254aa3d" xlink:to="loc_us-gaap_OtherDebtSecuritiesMember_5fdb0582-e112-43f6-a026-f585c6fa45b4" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_eef2d278-b547-464a-9f16-67c58b5673d1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_c35996d1-5ba8-401c-a9a1-56667c3aa507" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_eef2d278-b547-464a-9f16-67c58b5673d1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_eef2d278-b547-464a-9f16-67c58b5673d1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_eef2d278-b547-464a-9f16-67c58b5673d1" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_eef2d278-b547-464a-9f16-67c58b5673d1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_a49d468c-a207-457a-8090-e0e3dbe515e9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_eef2d278-b547-464a-9f16-67c58b5673d1" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_a49d468c-a207-457a-8090-e0e3dbe515e9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_e7247f2f-cc65-48eb-9479-93526b07d9fa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_a49d468c-a207-457a-8090-e0e3dbe515e9" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_e7247f2f-cc65-48eb-9479-93526b07d9fa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_d677c9a3-c015-497c-b189-3c9f77e074c1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_a49d468c-a207-457a-8090-e0e3dbe515e9" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_d677c9a3-c015-497c-b189-3c9f77e074c1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_e31762eb-6fe1-426d-ad01-80d7ebfee85e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_a49d468c-a207-457a-8090-e0e3dbe515e9" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_e31762eb-6fe1-426d-ad01-80d7ebfee85e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_2a65beaa-f75d-426f-923e-38c22d71ec89" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_e97b18c9-e390-4a39-bb75-cce474126161" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_2a65beaa-f75d-426f-923e-38c22d71ec89" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_FundsHeldForClientsCashAndCashEquivalentsAtCarryingValue_e7cbb358-49b6-4473-875d-b3cdd5422c95" xlink:href="pcty-20251231.xsd#pcty_FundsHeldForClientsCashAndCashEquivalentsAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_e97b18c9-e390-4a39-bb75-cce474126161" xlink:to="loc_pcty_FundsHeldForClientsCashAndCashEquivalentsAtCarryingValue_e7cbb358-49b6-4473-875d-b3cdd5422c95" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesAbstract_d096e679-9b14-40ee-9c79-544c9b72be70" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleSecuritiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_e97b18c9-e390-4a39-bb75-cce474126161" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesAbstract_d096e679-9b14-40ee-9c79-544c9b72be70" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_3d138eb0-3445-40eb-b58a-fede5363bed5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesAbstract_d096e679-9b14-40ee-9c79-544c9b72be70" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_3d138eb0-3445-40eb-b58a-fede5363bed5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Investments_f48d40ac-7cd3-4a03-adb5-ada3de26a435" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Investments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_e97b18c9-e390-4a39-bb75-cce474126161" xlink:to="loc_us-gaap_Investments_f48d40ac-7cd3-4a03-adb5-ada3de26a435" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.paylocity.com/role/DebtDetails" xlink:type="simple" xlink:href="pcty-20251231.xsd#DebtDetails"/>
  <link:definitionLink xlink:role="http://www.paylocity.com/role/DebtDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityLineItems_3fcb621e-4a95-4a22-addb-3e402c2fe030" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityTable_e898394e-b3db-4994-b2b6-fb18ababe451" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_3fcb621e-4a95-4a22-addb-3e402c2fe030" xlink:to="loc_us-gaap_LineOfCreditFacilityTable_e898394e-b3db-4994-b2b6-fb18ababe451" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_e730b481-9e3d-40a1-9b1c-bc59e98968eb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_e898394e-b3db-4994-b2b6-fb18ababe451" xlink:to="loc_us-gaap_CreditFacilityAxis_e730b481-9e3d-40a1-9b1c-bc59e98968eb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_e730b481-9e3d-40a1-9b1c-bc59e98968eb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_e730b481-9e3d-40a1-9b1c-bc59e98968eb" xlink:to="loc_us-gaap_CreditFacilityDomain_e730b481-9e3d-40a1-9b1c-bc59e98968eb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_3325b8fd-1508-41d2-a858-4066d4c4bc98" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_e730b481-9e3d-40a1-9b1c-bc59e98968eb" xlink:to="loc_us-gaap_CreditFacilityDomain_3325b8fd-1508-41d2-a858-4066d4c4bc98" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_b5fce82c-de7e-4bcb-aa98-147ce0350b35" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_3325b8fd-1508-41d2-a858-4066d4c4bc98" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_b5fce82c-de7e-4bcb-aa98-147ce0350b35" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_52b5a4b6-a74c-4da0-aa72-94744c0db5bd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_e898394e-b3db-4994-b2b6-fb18ababe451" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_52b5a4b6-a74c-4da0-aa72-94744c0db5bd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_52b5a4b6-a74c-4da0-aa72-94744c0db5bd_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_52b5a4b6-a74c-4da0-aa72-94744c0db5bd" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_52b5a4b6-a74c-4da0-aa72-94744c0db5bd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_a2098bbf-9884-4246-a456-9e202db03221" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_52b5a4b6-a74c-4da0-aa72-94744c0db5bd" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_a2098bbf-9884-4246-a456-9e202db03221" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebtMember_d6c8fac0-a805-42fd-aa6f-5ae5913eed1e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_a2098bbf-9884-4246-a456-9e202db03221" xlink:to="loc_us-gaap_SecuredDebtMember_d6c8fac0-a805-42fd-aa6f-5ae5913eed1e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateAxis_e6fe1d99-f6e2-46bd-a566-22dcbcb12207" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableRateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_e898394e-b3db-4994-b2b6-fb18ababe451" xlink:to="loc_us-gaap_VariableRateAxis_e6fe1d99-f6e2-46bd-a566-22dcbcb12207" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_e6fe1d99-f6e2-46bd-a566-22dcbcb12207_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_e6fe1d99-f6e2-46bd-a566-22dcbcb12207" xlink:to="loc_us-gaap_VariableRateDomain_e6fe1d99-f6e2-46bd-a566-22dcbcb12207_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_6b8b1c0d-c187-4e7e-b9e5-274a87fdd0d1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_e6fe1d99-f6e2-46bd-a566-22dcbcb12207" xlink:to="loc_us-gaap_VariableRateDomain_6b8b1c0d-c187-4e7e-b9e5-274a87fdd0d1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredOvernightFinancingRateSofrMember_2bbcae71-ec8b-4e37-a850-701df297ae99" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SecuredOvernightFinancingRateSofrMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_6b8b1c0d-c187-4e7e-b9e5-274a87fdd0d1" xlink:to="loc_us-gaap_SecuredOvernightFinancingRateSofrMember_2bbcae71-ec8b-4e37-a850-701df297ae99" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BaseRateMember_0ae4ef5e-9fdc-43db-af1f-5f78d2a92a60" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BaseRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_6b8b1c0d-c187-4e7e-b9e5-274a87fdd0d1" xlink:to="loc_us-gaap_BaseRateMember_0ae4ef5e-9fdc-43db-af1f-5f78d2a92a60" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_88f2205e-7ddf-4f1d-8491-9fe43d958e95" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_e898394e-b3db-4994-b2b6-fb18ababe451" xlink:to="loc_srt_RangeAxis_88f2205e-7ddf-4f1d-8491-9fe43d958e95" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_88f2205e-7ddf-4f1d-8491-9fe43d958e95_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_88f2205e-7ddf-4f1d-8491-9fe43d958e95" xlink:to="loc_srt_RangeMember_88f2205e-7ddf-4f1d-8491-9fe43d958e95_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_c12f741b-1d20-4aa8-8683-405a7974280e" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_88f2205e-7ddf-4f1d-8491-9fe43d958e95" xlink:to="loc_srt_RangeMember_c12f741b-1d20-4aa8-8683-405a7974280e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_7ba055ef-d16b-406a-8bac-84f7c872ea54" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_c12f741b-1d20-4aa8-8683-405a7974280e" xlink:to="loc_srt_MinimumMember_7ba055ef-d16b-406a-8bac-84f7c872ea54" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_e20081c7-7505-45e7-919b-fd538e257173" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_c12f741b-1d20-4aa8-8683-405a7974280e" xlink:to="loc_srt_MaximumMember_e20081c7-7505-45e7-919b-fd538e257173" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_9da99e36-b666-4944-ab9a-c9320dad6e0a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_3fcb621e-4a95-4a22-addb-3e402c2fe030" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_9da99e36-b666-4944-ab9a-c9320dad6e0a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_LineOfCreditFacilityContingentIncreaseAggregateMaximumBorrowingCapacity_0e594b77-e0ce-4e4c-b4cf-81317151dcbb" xlink:href="pcty-20251231.xsd#pcty_LineOfCreditFacilityContingentIncreaseAggregateMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_3fcb621e-4a95-4a22-addb-3e402c2fe030" xlink:to="loc_pcty_LineOfCreditFacilityContingentIncreaseAggregateMaximumBorrowingCapacity_0e594b77-e0ce-4e4c-b4cf-81317151dcbb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_513479e6-bddf-4db4-8c96-d0e437293a7d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_3fcb621e-4a95-4a22-addb-3e402c2fe030" xlink:to="loc_us-gaap_LongTermDebt_513479e6-bddf-4db4-8c96-d0e437293a7d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromLinesOfCredit_ef096f2d-254e-40e3-9f74-e12f476d9eb6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromLinesOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_3fcb621e-4a95-4a22-addb-3e402c2fe030" xlink:to="loc_us-gaap_ProceedsFromLinesOfCredit_ef096f2d-254e-40e3-9f74-e12f476d9eb6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfLinesOfCredit_68fe22e4-a219-4427-b238-3f054e404fc0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RepaymentsOfLinesOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_3fcb621e-4a95-4a22-addb-3e402c2fe030" xlink:to="loc_us-gaap_RepaymentsOfLinesOfCredit_68fe22e4-a219-4427-b238-3f054e404fc0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_c531a8e3-eece-499f-8872-dce11658278a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_3fcb621e-4a95-4a22-addb-3e402c2fe030" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_c531a8e3-eece-499f-8872-dce11658278a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_CreditFacilityCovenantConsolidatedLeverageRatio_faa05f5e-6c61-48a3-ac53-680a17917c95" xlink:href="pcty-20251231.xsd#pcty_CreditFacilityCovenantConsolidatedLeverageRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_3fcb621e-4a95-4a22-addb-3e402c2fe030" xlink:to="loc_pcty_CreditFacilityCovenantConsolidatedLeverageRatio_faa05f5e-6c61-48a3-ac53-680a17917c95" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_CreditFacilityCovenantSeniorSecuredLeverageRatio_b101f3a8-76ab-4a0a-9340-b1408da6e54a" xlink:href="pcty-20251231.xsd#pcty_CreditFacilityCovenantSeniorSecuredLeverageRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_3fcb621e-4a95-4a22-addb-3e402c2fe030" xlink:to="loc_pcty_CreditFacilityCovenantSeniorSecuredLeverageRatio_b101f3a8-76ab-4a0a-9340-b1408da6e54a" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_CreditFacilityCovenantConsolidatedInterestCoverageRatio_237e104c-aab1-46df-bf54-eda504a82ec9" xlink:href="pcty-20251231.xsd#pcty_CreditFacilityCovenantConsolidatedInterestCoverageRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_3fcb621e-4a95-4a22-addb-3e402c2fe030" xlink:to="loc_pcty_CreditFacilityCovenantConsolidatedInterestCoverageRatio_237e104c-aab1-46df-bf54-eda504a82ec9" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.paylocity.com/role/StockBasedCompensationGeneralInformationDetails" xlink:type="simple" xlink:href="pcty-20251231.xsd#StockBasedCompensationGeneralInformationDetails"/>
  <link:definitionLink xlink:role="http://www.paylocity.com/role/StockBasedCompensationGeneralInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_17e0b27a-522b-4f81-9515-cde2699c8957" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_572a5935-aed7-4194-af63-a03803aecba2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_17e0b27a-522b-4f81-9515-cde2699c8957" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_572a5935-aed7-4194-af63-a03803aecba2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_39215ee8-eea5-4432-8464-c5940f9d5497" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_572a5935-aed7-4194-af63-a03803aecba2" xlink:to="loc_us-gaap_PlanNameAxis_39215ee8-eea5-4432-8464-c5940f9d5497" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_39215ee8-eea5-4432-8464-c5940f9d5497_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_39215ee8-eea5-4432-8464-c5940f9d5497" xlink:to="loc_us-gaap_PlanNameDomain_39215ee8-eea5-4432-8464-c5940f9d5497_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_51ffa2ef-aedc-4440-8834-d91fc4320183" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_39215ee8-eea5-4432-8464-c5940f9d5497" xlink:to="loc_us-gaap_PlanNameDomain_51ffa2ef-aedc-4440-8834-d91fc4320183" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_EquityIncentivePlansMember_019be203-a590-7ec8-95b9-e6eb83ffdb97" xlink:href="pcty-20251231.xsd#pcty_EquityIncentivePlansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_51ffa2ef-aedc-4440-8834-d91fc4320183" xlink:to="loc_pcty_EquityIncentivePlansMember_019be203-a590-7ec8-95b9-e6eb83ffdb97" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized_019bdd91-1dc7-7964-b5bc-564b3ec783a6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_17e0b27a-522b-4f81-9515-cde2699c8957" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized_019bdd91-1dc7-7964-b5bc-564b3ec783a6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_edac0a37-8d28-4cb0-aa69-58843fc7c2d2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_17e0b27a-522b-4f81-9515-cde2699c8957" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_edac0a37-8d28-4cb0-aa69-58843fc7c2d2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfCapitalSharesReservedForIssuance_54f68db9-7d45-4ef7-b56d-82b2cd250f0a" xlink:href="pcty-20251231.xsd#pcty_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfCapitalSharesReservedForIssuance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_17e0b27a-522b-4f81-9515-cde2699c8957" xlink:to="loc_pcty_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfCapitalSharesReservedForIssuance_54f68db9-7d45-4ef7-b56d-82b2cd250f0a" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.paylocity.com/role/StockBasedCompensationCompensationExpenseDetails" xlink:type="simple" xlink:href="pcty-20251231.xsd#StockBasedCompensationCompensationExpenseDetails"/>
  <link:definitionLink xlink:role="http://www.paylocity.com/role/StockBasedCompensationCompensationExpenseDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_f41db7a3-00ae-4b6f-8b20-ec4b42d10418" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_e7b808b5-c1d0-4d9f-bcdf-79e02fd82394" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_f41db7a3-00ae-4b6f-8b20-ec4b42d10418" xlink:to="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_e7b808b5-c1d0-4d9f-bcdf-79e02fd82394" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_bf9705f0-a7e0-40fb-bd96-2fd756c36a6e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_e7b808b5-c1d0-4d9f-bcdf-79e02fd82394" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_bf9705f0-a7e0-40fb-bd96-2fd756c36a6e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_bf9705f0-a7e0-40fb-bd96-2fd756c36a6e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_bf9705f0-a7e0-40fb-bd96-2fd756c36a6e" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_bf9705f0-a7e0-40fb-bd96-2fd756c36a6e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_0ea333bd-9cc4-4e15-98a1-473cfa77642c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_bf9705f0-a7e0-40fb-bd96-2fd756c36a6e" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_0ea333bd-9cc4-4e15-98a1-473cfa77642c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfSalesMember_b3aa4000-3ec7-4a3d-be48-d09015b18c23" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostOfSalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_0ea333bd-9cc4-4e15-98a1-473cfa77642c" xlink:to="loc_us-gaap_CostOfSalesMember_b3aa4000-3ec7-4a3d-be48-d09015b18c23" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingAndMarketingExpenseMember_7e22fd6b-b096-4c94-9d07-c412c71459e2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SellingAndMarketingExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_0ea333bd-9cc4-4e15-98a1-473cfa77642c" xlink:to="loc_us-gaap_SellingAndMarketingExpenseMember_7e22fd6b-b096-4c94-9d07-c412c71459e2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpenseMember_5cf1b265-9521-4c6a-9782-419d9cdbb682" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ResearchAndDevelopmentExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_0ea333bd-9cc4-4e15-98a1-473cfa77642c" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpenseMember_5cf1b265-9521-4c6a-9782-419d9cdbb682" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpenseMember_78898e61-87fa-4fb2-aab8-c1f1bd09be98" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GeneralAndAdministrativeExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_0ea333bd-9cc4-4e15-98a1-473cfa77642c" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpenseMember_78898e61-87fa-4fb2-aab8-c1f1bd09be98" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_12561742-8622-4ae7-91c2-8e4d3bfec2f3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_f41db7a3-00ae-4b6f-8b20-ec4b42d10418" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_12561742-8622-4ae7-91c2-8e4d3bfec2f3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount_58c06314-2d7a-4ab6-b409-522fefb40d3d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_f41db7a3-00ae-4b6f-8b20-ec4b42d10418" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount_58c06314-2d7a-4ab6-b409-522fefb40d3d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedAbstract_99c9467d-3100-4f6d-8103-9760febf4d3f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_f41db7a3-00ae-4b6f-8b20-ec4b42d10418" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedAbstract_99c9467d-3100-4f6d-8103-9760febf4d3f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions_695f61da-34b2-4c68-95f5-8c2c15ddeaf7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedAbstract_99c9467d-3100-4f6d-8103-9760febf4d3f" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions_695f61da-34b2-4c68-95f5-8c2c15ddeaf7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_858aa8cc-a2aa-4842-9b30-49f8b3db4787" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedAbstract_99c9467d-3100-4f6d-8103-9760febf4d3f" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_858aa8cc-a2aa-4842-9b30-49f8b3db4787" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.paylocity.com/role/StockBasedCompensationRSUActivityDetails" xlink:type="simple" xlink:href="pcty-20251231.xsd#StockBasedCompensationRSUActivityDetails"/>
  <link:definitionLink xlink:role="http://www.paylocity.com/role/StockBasedCompensationRSUActivityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_b0f2529b-72ac-4d0d-a3d0-e7a63ced093f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_01098730-cae7-4444-9d0f-083cac1e5232" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_b0f2529b-72ac-4d0d-a3d0-e7a63ced093f" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_01098730-cae7-4444-9d0f-083cac1e5232" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_6ffcbf23-a4bf-47ff-8c88-794e9e7f1b63" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_01098730-cae7-4444-9d0f-083cac1e5232" xlink:to="loc_us-gaap_AwardTypeAxis_6ffcbf23-a4bf-47ff-8c88-794e9e7f1b63" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_6ffcbf23-a4bf-47ff-8c88-794e9e7f1b63_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_6ffcbf23-a4bf-47ff-8c88-794e9e7f1b63" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_6ffcbf23-a4bf-47ff-8c88-794e9e7f1b63_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_f32653c4-a8a2-458c-9444-e25271cda93a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_6ffcbf23-a4bf-47ff-8c88-794e9e7f1b63" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_f32653c4-a8a2-458c-9444-e25271cda93a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_464ceac0-8975-40c5-9a89-98a200e63748" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_f32653c4-a8a2-458c-9444-e25271cda93a" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_464ceac0-8975-40c5-9a89-98a200e63748" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_3f1d61a4-e1e9-430d-a847-ae44510ac94e" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_01098730-cae7-4444-9d0f-083cac1e5232" xlink:to="loc_srt_RangeAxis_3f1d61a4-e1e9-430d-a847-ae44510ac94e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_3f1d61a4-e1e9-430d-a847-ae44510ac94e_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_3f1d61a4-e1e9-430d-a847-ae44510ac94e" xlink:to="loc_srt_RangeMember_3f1d61a4-e1e9-430d-a847-ae44510ac94e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_9f2e5dd8-49e8-49be-ab8c-58872b0143d9" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_3f1d61a4-e1e9-430d-a847-ae44510ac94e" xlink:to="loc_srt_RangeMember_9f2e5dd8-49e8-49be-ab8c-58872b0143d9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_27000b80-c348-4cff-a65d-115d020f1c69" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_9f2e5dd8-49e8-49be-ab8c-58872b0143d9" xlink:to="loc_srt_MinimumMember_27000b80-c348-4cff-a65d-115d020f1c69" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_49ac72fa-d3c0-4939-ab38-430d9748aac4" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_9f2e5dd8-49e8-49be-ab8c-58872b0143d9" xlink:to="loc_srt_MaximumMember_49ac72fa-d3c0-4939-ab38-430d9748aac4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_5d6eaafd-1fe9-495a-9ea8-8fe7d7e1aee0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_b0f2529b-72ac-4d0d-a3d0-e7a63ced093f" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_5d6eaafd-1fe9-495a-9ea8-8fe7d7e1aee0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_00b7cd89-e4e4-452a-a815-4687841a7ddd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_b0f2529b-72ac-4d0d-a3d0-e7a63ced093f" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_00b7cd89-e4e4-452a-a815-4687841a7ddd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_1f3894c2-16f8-45cf-a3a0-93b9a5fa3e01" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_00b7cd89-e4e4-452a-a815-4687841a7ddd" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_1f3894c2-16f8-45cf-a3a0-93b9a5fa3e01" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_0fcee656-68cf-4ac1-b711-06e14b98df93" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_00b7cd89-e4e4-452a-a815-4687841a7ddd" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_0fcee656-68cf-4ac1-b711-06e14b98df93" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_f53046f4-dc28-4d01-af47-26887b26622a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_00b7cd89-e4e4-452a-a815-4687841a7ddd" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_f53046f4-dc28-4d01-af47-26887b26622a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_19f4af9f-b02d-4d09-ae0f-f8d3ddeb38b7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_00b7cd89-e4e4-452a-a815-4687841a7ddd" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_19f4af9f-b02d-4d09-ae0f-f8d3ddeb38b7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_94fbbe4f-e4a9-4ce3-ba93-40bcb3be3054" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_28de790d-f77f-4939-9c0d-08f8a2ec142a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_b0f2529b-72ac-4d0d-a3d0-e7a63ced093f" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_28de790d-f77f-4939-9c0d-08f8a2ec142a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_b3882d7b-d889-4588-ba38-8dbf2e1e28e5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_28de790d-f77f-4939-9c0d-08f8a2ec142a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_b3882d7b-d889-4588-ba38-8dbf2e1e28e5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_7b19475f-58d1-4f5d-82b4-aca25c7a1b12" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_28de790d-f77f-4939-9c0d-08f8a2ec142a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_7b19475f-58d1-4f5d-82b4-aca25c7a1b12" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_0e4810fe-b62b-45bc-91bf-efa12ae280a3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_28de790d-f77f-4939-9c0d-08f8a2ec142a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_0e4810fe-b62b-45bc-91bf-efa12ae280a3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_95fa6cab-8608-419a-8881-cbf8bc082147" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_28de790d-f77f-4939-9c0d-08f8a2ec142a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_95fa6cab-8608-419a-8881-cbf8bc082147" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_daba2cef-a2cb-4a3a-8ea8-6f6c786c73bc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.paylocity.com/role/StockBasedCompensationPSUActivityDetails" xlink:type="simple" xlink:href="pcty-20251231.xsd#StockBasedCompensationPSUActivityDetails"/>
  <link:definitionLink xlink:role="http://www.paylocity.com/role/StockBasedCompensationPSUActivityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_2b7cec36-a960-4c92-b3c0-0989acebc0ce" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_434f6acd-cdaa-4e60-b077-371bb433730c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_2b7cec36-a960-4c92-b3c0-0989acebc0ce" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_434f6acd-cdaa-4e60-b077-371bb433730c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_72847b0d-c607-4975-8409-5b3645c66e74" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_434f6acd-cdaa-4e60-b077-371bb433730c" xlink:to="loc_us-gaap_AwardTypeAxis_72847b0d-c607-4975-8409-5b3645c66e74" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_72847b0d-c607-4975-8409-5b3645c66e74_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_72847b0d-c607-4975-8409-5b3645c66e74" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_72847b0d-c607-4975-8409-5b3645c66e74_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_c64ee81f-dabf-448f-ad48-e148d7c17f07" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_72847b0d-c607-4975-8409-5b3645c66e74" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_c64ee81f-dabf-448f-ad48-e148d7c17f07" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_1c6e2ae7-dbe2-4903-84d7-d77e2f8ac2ce" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_c64ee81f-dabf-448f-ad48-e148d7c17f07" xlink:to="loc_us-gaap_PerformanceSharesMember_1c6e2ae7-dbe2-4903-84d7-d77e2f8ac2ce" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_c181c9cc-2800-4f71-b2b1-be2374c99fca" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_434f6acd-cdaa-4e60-b077-371bb433730c" xlink:to="loc_srt_RangeAxis_c181c9cc-2800-4f71-b2b1-be2374c99fca" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_c181c9cc-2800-4f71-b2b1-be2374c99fca_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_c181c9cc-2800-4f71-b2b1-be2374c99fca" xlink:to="loc_srt_RangeMember_c181c9cc-2800-4f71-b2b1-be2374c99fca_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_1d7678b7-433c-4eb8-85a0-467c5f69db0e" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_c181c9cc-2800-4f71-b2b1-be2374c99fca" xlink:to="loc_srt_RangeMember_1d7678b7-433c-4eb8-85a0-467c5f69db0e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_d9c9d104-b97e-49f1-930a-4feb70fed30d" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_1d7678b7-433c-4eb8-85a0-467c5f69db0e" xlink:to="loc_srt_MaximumMember_d9c9d104-b97e-49f1-930a-4feb70fed30d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_PSUPerformanceMeasurementPeriod_cb0feab2-ff59-4f9c-bbb0-da066fea84e3" xlink:href="pcty-20251231.xsd#pcty_PSUPerformanceMeasurementPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_2b7cec36-a960-4c92-b3c0-0989acebc0ce" xlink:to="loc_pcty_PSUPerformanceMeasurementPeriod_cb0feab2-ff59-4f9c-bbb0-da066fea84e3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_0497306e-4464-41ac-9328-4466882383bd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_2b7cec36-a960-4c92-b3c0-0989acebc0ce" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_0497306e-4464-41ac-9328-4466882383bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_PercentageOfSharesTargetToEachPerformanceStockUnit_1e26beae-6da7-4479-abc6-793cc07b639a" xlink:href="pcty-20251231.xsd#pcty_PercentageOfSharesTargetToEachPerformanceStockUnit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_2b7cec36-a960-4c92-b3c0-0989acebc0ce" xlink:to="loc_pcty_PercentageOfSharesTargetToEachPerformanceStockUnit_1e26beae-6da7-4479-abc6-793cc07b639a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_544c19df-3a08-410c-b1d3-d300f558ad5f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_2b7cec36-a960-4c92-b3c0-0989acebc0ce" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_544c19df-3a08-410c-b1d3-d300f558ad5f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_82123d10-7c17-4f62-b648-d2165fd27b1b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_544c19df-3a08-410c-b1d3-d300f558ad5f" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_82123d10-7c17-4f62-b648-d2165fd27b1b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_0c5f9ccf-3825-4213-8bd9-9ad382162cb6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_544c19df-3a08-410c-b1d3-d300f558ad5f" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_0c5f9ccf-3825-4213-8bd9-9ad382162cb6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_268f9d6d-2e65-40a8-8b7d-4822e3439af0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_544c19df-3a08-410c-b1d3-d300f558ad5f" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_268f9d6d-2e65-40a8-8b7d-4822e3439af0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_1fc2c09f-5c25-47ce-8e86-d1905e01bc83" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_de761a3d-8e66-43b9-abbf-67cf68e516a1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_2b7cec36-a960-4c92-b3c0-0989acebc0ce" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_de761a3d-8e66-43b9-abbf-67cf68e516a1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_b1b8f745-3e38-4c85-b09d-a61cf872d643" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_de761a3d-8e66-43b9-abbf-67cf68e516a1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_b1b8f745-3e38-4c85-b09d-a61cf872d643" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_d73b4dd1-3cd7-4816-bb6e-89f39ba854e0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_de761a3d-8e66-43b9-abbf-67cf68e516a1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_d73b4dd1-3cd7-4816-bb6e-89f39ba854e0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_0759399e-c123-49a0-a964-6ce6ed8e45f2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_de761a3d-8e66-43b9-abbf-67cf68e516a1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_0759399e-c123-49a0-a964-6ce6ed8e45f2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_3c7f7256-12c7-403f-a0cd-3bc54bbc1fc8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.paylocity.com/role/StockBasedCompensationMSUActivityDetails" xlink:type="simple" xlink:href="pcty-20251231.xsd#StockBasedCompensationMSUActivityDetails"/>
  <link:definitionLink xlink:role="http://www.paylocity.com/role/StockBasedCompensationMSUActivityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_5af42c5a-9447-4aac-93c0-f5e4b0f31465" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_f2ad530b-94da-4131-a948-4cb88d3dc4a7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_5af42c5a-9447-4aac-93c0-f5e4b0f31465" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_f2ad530b-94da-4131-a948-4cb88d3dc4a7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_ee22453c-51cf-41f4-b5a1-aa3e29ed58da" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_f2ad530b-94da-4131-a948-4cb88d3dc4a7" xlink:to="loc_us-gaap_AwardTypeAxis_ee22453c-51cf-41f4-b5a1-aa3e29ed58da" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_ee22453c-51cf-41f4-b5a1-aa3e29ed58da_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_ee22453c-51cf-41f4-b5a1-aa3e29ed58da" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_ee22453c-51cf-41f4-b5a1-aa3e29ed58da_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_ac110b0a-f6e8-45a9-aafd-14f4ca1063c0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_ee22453c-51cf-41f4-b5a1-aa3e29ed58da" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_ac110b0a-f6e8-45a9-aafd-14f4ca1063c0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_MarketStockUnitsMember_ee9dd54d-ce73-456a-9239-3f1a45bf9a71" xlink:href="pcty-20251231.xsd#pcty_MarketStockUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_ac110b0a-f6e8-45a9-aafd-14f4ca1063c0" xlink:to="loc_pcty_MarketStockUnitsMember_ee9dd54d-ce73-456a-9239-3f1a45bf9a71" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_f39a14ff-12c7-4391-9098-033ea69ac154" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_f2ad530b-94da-4131-a948-4cb88d3dc4a7" xlink:to="loc_srt_RangeAxis_f39a14ff-12c7-4391-9098-033ea69ac154" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_f39a14ff-12c7-4391-9098-033ea69ac154_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_f39a14ff-12c7-4391-9098-033ea69ac154" xlink:to="loc_srt_RangeMember_f39a14ff-12c7-4391-9098-033ea69ac154_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_49522937-92c9-41bc-aa2e-9080622c0474" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_f39a14ff-12c7-4391-9098-033ea69ac154" xlink:to="loc_srt_RangeMember_49522937-92c9-41bc-aa2e-9080622c0474" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_cc624492-dbfc-4c4f-99a2-2f7020fc8bcf" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_49522937-92c9-41bc-aa2e-9080622c0474" xlink:to="loc_srt_MaximumMember_cc624492-dbfc-4c4f-99a2-2f7020fc8bcf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_b1cac5a8-70e5-407c-9eaa-e5661651ad7e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_5af42c5a-9447-4aac-93c0-f5e4b0f31465" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_b1cac5a8-70e5-407c-9eaa-e5661651ad7e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_PercentageOfSharesTargetToEachMarketShareUnit_c3536d11-88ef-4d77-9856-b539ed00ba31" xlink:href="pcty-20251231.xsd#pcty_PercentageOfSharesTargetToEachMarketShareUnit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_5af42c5a-9447-4aac-93c0-f5e4b0f31465" xlink:to="loc_pcty_PercentageOfSharesTargetToEachMarketShareUnit_c3536d11-88ef-4d77-9856-b539ed00ba31" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_55a5021d-8376-47bc-8d7b-bc89cfe0a22a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_5af42c5a-9447-4aac-93c0-f5e4b0f31465" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_55a5021d-8376-47bc-8d7b-bc89cfe0a22a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_18cf864b-6e2f-4ad5-aa16-55d1357ef7fb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_55a5021d-8376-47bc-8d7b-bc89cfe0a22a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_18cf864b-6e2f-4ad5-aa16-55d1357ef7fb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_459e9e08-8422-4507-8e4e-4cc93aea3a27" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_55a5021d-8376-47bc-8d7b-bc89cfe0a22a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_459e9e08-8422-4507-8e4e-4cc93aea3a27" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_d1567691-a018-4297-99e3-1c1f9a118fc9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_55a5021d-8376-47bc-8d7b-bc89cfe0a22a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_d1567691-a018-4297-99e3-1c1f9a118fc9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_b311c8f2-c637-41c8-8969-e3f1c552799f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_55a5021d-8376-47bc-8d7b-bc89cfe0a22a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_b311c8f2-c637-41c8-8969-e3f1c552799f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_006d2d12-a61c-4024-bcfb-c80887b1dd42" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_876453ad-5b95-41f5-b596-4e36cd3993eb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_5af42c5a-9447-4aac-93c0-f5e4b0f31465" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_876453ad-5b95-41f5-b596-4e36cd3993eb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_698b6df6-5d16-4c32-96a8-4cd9a4613b20" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_876453ad-5b95-41f5-b596-4e36cd3993eb" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_698b6df6-5d16-4c32-96a8-4cd9a4613b20" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_abceffe8-58bb-4ea2-ad0c-1b271101b676" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_876453ad-5b95-41f5-b596-4e36cd3993eb" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_abceffe8-58bb-4ea2-ad0c-1b271101b676" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_be365016-3d5d-4822-a169-673e9dd48293" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_876453ad-5b95-41f5-b596-4e36cd3993eb" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_be365016-3d5d-4822-a169-673e9dd48293" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_d0d25b3e-2ab2-47b5-944b-7b50b6bfd6a9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_876453ad-5b95-41f5-b596-4e36cd3993eb" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_d0d25b3e-2ab2-47b5-944b-7b50b6bfd6a9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_2fc0b325-ee07-492a-a82b-bde332d6b770" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.paylocity.com/role/StockBasedCompensationMSUInformationDetails" xlink:type="simple" xlink:href="pcty-20251231.xsd#StockBasedCompensationMSUInformationDetails"/>
  <link:definitionLink xlink:role="http://www.paylocity.com/role/StockBasedCompensationMSUInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_e421bb6f-27d6-4424-8143-38f13ffb75d9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_8e579d67-850c-4060-a5db-54a7e5647aed" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_e421bb6f-27d6-4424-8143-38f13ffb75d9" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_8e579d67-850c-4060-a5db-54a7e5647aed" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_d68e6c76-008d-45a1-b20b-8a4613b0683b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_8e579d67-850c-4060-a5db-54a7e5647aed" xlink:to="loc_us-gaap_AwardTypeAxis_d68e6c76-008d-45a1-b20b-8a4613b0683b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_d68e6c76-008d-45a1-b20b-8a4613b0683b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_d68e6c76-008d-45a1-b20b-8a4613b0683b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_d68e6c76-008d-45a1-b20b-8a4613b0683b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_a5628dcb-f346-4e72-b78c-0f5723163338" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_d68e6c76-008d-45a1-b20b-8a4613b0683b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_a5628dcb-f346-4e72-b78c-0f5723163338" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_MarketStockUnitsMember_49be6ff6-3254-4533-816a-5785a7820f43" xlink:href="pcty-20251231.xsd#pcty_MarketStockUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_a5628dcb-f346-4e72-b78c-0f5723163338" xlink:to="loc_pcty_MarketStockUnitsMember_49be6ff6-3254-4533-816a-5785a7820f43" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_ffe640e7-f688-428f-a29b-419da797d4d9" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_8e579d67-850c-4060-a5db-54a7e5647aed" xlink:to="loc_srt_RangeAxis_ffe640e7-f688-428f-a29b-419da797d4d9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_ffe640e7-f688-428f-a29b-419da797d4d9_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_ffe640e7-f688-428f-a29b-419da797d4d9" xlink:to="loc_srt_RangeMember_ffe640e7-f688-428f-a29b-419da797d4d9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_a4b0cc09-47d6-4688-ab8f-725d92a6382a" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_ffe640e7-f688-428f-a29b-419da797d4d9" xlink:to="loc_srt_RangeMember_a4b0cc09-47d6-4688-ab8f-725d92a6382a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_3c01d71c-7384-449a-a001-5bcf2a23e921" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_a4b0cc09-47d6-4688-ab8f-725d92a6382a" xlink:to="loc_srt_MinimumMember_3c01d71c-7384-449a-a001-5bcf2a23e921" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_28c1d6e4-e8b6-47b5-95fe-394dbbbbd6a1" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_a4b0cc09-47d6-4688-ab8f-725d92a6382a" xlink:to="loc_srt_MaximumMember_28c1d6e4-e8b6-47b5-95fe-394dbbbbd6a1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract_0e9dd1d4-49a0-471c-8839-9c461c70f9df" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_e421bb6f-27d6-4424-8143-38f13ffb75d9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract_0e9dd1d4-49a0-471c-8839-9c461c70f9df" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_3c53daf1-d3ec-4e3a-84a1-3690a7a34a68" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract_0e9dd1d4-49a0-471c-8839-9c461c70f9df" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_3c53daf1-d3ec-4e3a-84a1-3690a7a34a68" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_7ea53634-9aed-4739-aace-10bdd6282433" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract_0e9dd1d4-49a0-471c-8839-9c461c70f9df" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_7ea53634-9aed-4739-aace-10bdd6282433" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_0b73d3d5-8c48-44b2-bfaf-890d068a4d8a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract_0e9dd1d4-49a0-471c-8839-9c461c70f9df" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_0b73d3d5-8c48-44b2-bfaf-890d068a4d8a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_c1bb9b07-455e-4160-8be7-2545ed58e055" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract_0e9dd1d4-49a0-471c-8839-9c461c70f9df" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_c1bb9b07-455e-4160-8be7-2545ed58e055" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.paylocity.com/role/NetIncomePerShareDetails" xlink:type="simple" xlink:href="pcty-20251231.xsd#NetIncomePerShareDetails"/>
  <link:definitionLink xlink:role="http://www.paylocity.com/role/NetIncomePerShareDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_d4382086-261b-410e-9e0a-e90c6865dc24" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_ScheduleOfEarningsPerShareTable_aa5565ec-7e25-4c81-aa9c-c71d8cefcfc3" xlink:href="pcty-20251231.xsd#pcty_ScheduleOfEarningsPerShareTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_d4382086-261b-410e-9e0a-e90c6865dc24" xlink:to="loc_pcty_ScheduleOfEarningsPerShareTable_aa5565ec-7e25-4c81-aa9c-c71d8cefcfc3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_b7613de5-6f51-42d5-ba74-9a22889998cf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_pcty_ScheduleOfEarningsPerShareTable_aa5565ec-7e25-4c81-aa9c-c71d8cefcfc3" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_b7613de5-6f51-42d5-ba74-9a22889998cf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_b7613de5-6f51-42d5-ba74-9a22889998cf_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_b7613de5-6f51-42d5-ba74-9a22889998cf" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_b7613de5-6f51-42d5-ba74-9a22889998cf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_937f01ce-ba14-4a93-b469-d00cbf128033" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_b7613de5-6f51-42d5-ba74-9a22889998cf" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_937f01ce-ba14-4a93-b469-d00cbf128033" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_258dfa41-a27d-46b5-8227-aadce4ee3405" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_937f01ce-ba14-4a93-b469-d00cbf128033" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_258dfa41-a27d-46b5-8227-aadce4ee3405" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_c2d31143-f20b-4b26-a96d-8eddf7b23139" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_937f01ce-ba14-4a93-b469-d00cbf128033" xlink:to="loc_us-gaap_PerformanceSharesMember_c2d31143-f20b-4b26-a96d-8eddf7b23139" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_MarketStockUnitsMember_58af32c5-37b5-4106-a3ff-f3cdb5e4d363" xlink:href="pcty-20251231.xsd#pcty_MarketStockUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_937f01ce-ba14-4a93-b469-d00cbf128033" xlink:to="loc_pcty_MarketStockUnitsMember_58af32c5-37b5-4106-a3ff-f3cdb5e4d363" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareReconciliationAbstract_3210e076-224d-454a-aecd-305bb507315c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EarningsPerShareReconciliationAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_d4382086-261b-410e-9e0a-e90c6865dc24" xlink:to="loc_us-gaap_EarningsPerShareReconciliationAbstract_3210e076-224d-454a-aecd-305bb507315c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_NumeratorForCalculationOfBasicAndDilutedNetLossPerShareAbstract_176fb209-b4e9-4ef7-8cd9-dd42f610a572" xlink:href="pcty-20251231.xsd#pcty_NumeratorForCalculationOfBasicAndDilutedNetLossPerShareAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareReconciliationAbstract_3210e076-224d-454a-aecd-305bb507315c" xlink:to="loc_pcty_NumeratorForCalculationOfBasicAndDilutedNetLossPerShareAbstract_176fb209-b4e9-4ef7-8cd9-dd42f610a572" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_30d9b4ae-62e5-4e3c-b89a-77d2e206efca" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_pcty_NumeratorForCalculationOfBasicAndDilutedNetLossPerShareAbstract_176fb209-b4e9-4ef7-8cd9-dd42f610a572" xlink:to="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_30d9b4ae-62e5-4e3c-b89a-77d2e206efca" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_DenominatorForCalculationOfBasicAndDilutedNetLossPerShareAbstract_699c932a-2e00-4820-bb09-886408a4cda3" xlink:href="pcty-20251231.xsd#pcty_DenominatorForCalculationOfBasicAndDilutedNetLossPerShareAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareReconciliationAbstract_3210e076-224d-454a-aecd-305bb507315c" xlink:to="loc_pcty_DenominatorForCalculationOfBasicAndDilutedNetLossPerShareAbstract_699c932a-2e00-4820-bb09-886408a4cda3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasicAbstract_9c72852b-3040-45d3-a70e-2c104058c65c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasicAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_pcty_DenominatorForCalculationOfBasicAndDilutedNetLossPerShareAbstract_699c932a-2e00-4820-bb09-886408a4cda3" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasicAbstract_9c72852b-3040-45d3-a70e-2c104058c65c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_54dc669a-7f96-4fc9-84de-db7511047c47" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasicAbstract_9c72852b-3040-45d3-a70e-2c104058c65c" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_54dc669a-7f96-4fc9-84de-db7511047c47" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract_e665757d-1688-4f17-9f2a-720c8054d9de" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_pcty_DenominatorForCalculationOfBasicAndDilutedNetLossPerShareAbstract_699c932a-2e00-4820-bb09-886408a4cda3" xlink:to="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract_e665757d-1688-4f17-9f2a-720c8054d9de" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_f73a12a7-5224-4964-8b44-9fd1c6d74f75" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract_e665757d-1688-4f17-9f2a-720c8054d9de" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_f73a12a7-5224-4964-8b44-9fd1c6d74f75" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_864062f6-cdff-474e-8771-472b257e20d4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_pcty_DenominatorForCalculationOfBasicAndDilutedNetLossPerShareAbstract_699c932a-2e00-4820-bb09-886408a4cda3" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_864062f6-cdff-474e-8771-472b257e20d4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_NetIncomePerShareAbstract_a9d089ad-4196-4e15-ab13-76df04031731" xlink:href="pcty-20251231.xsd#pcty_NetIncomePerShareAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareReconciliationAbstract_3210e076-224d-454a-aecd-305bb507315c" xlink:to="loc_pcty_NetIncomePerShareAbstract_a9d089ad-4196-4e15-ab13-76df04031731" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic_81d6c616-f516-46aa-b1e3-0a384dbba325" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EarningsPerShareBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_pcty_NetIncomePerShareAbstract_a9d089ad-4196-4e15-ab13-76df04031731" xlink:to="loc_us-gaap_EarningsPerShareBasic_81d6c616-f516-46aa-b1e3-0a384dbba325" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDiluted_60258dce-777f-4485-bbd4-a05ad041b177" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EarningsPerShareDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_pcty_NetIncomePerShareAbstract_a9d089ad-4196-4e15-ab13-76df04031731" xlink:to="loc_us-gaap_EarningsPerShareDiluted_60258dce-777f-4485-bbd4-a05ad041b177" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_ddc7cb68-eb6f-4e2c-9c5a-17198481de8e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareReconciliationAbstract_3210e076-224d-454a-aecd-305bb507315c" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_ddc7cb68-eb6f-4e2c-9c5a-17198481de8e" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.paylocity.com/role/SegmentReportingDetails" xlink:type="simple" xlink:href="pcty-20251231.xsd#SegmentReportingDetails"/>
  <link:definitionLink xlink:role="http://www.paylocity.com/role/SegmentReportingDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_4a08e860-46b0-4f5f-8561-1e3429e33de2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_11434297-4aa6-4e0d-ad96-4171967640cb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_4a08e860-46b0-4f5f-8561-1e3429e33de2" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_11434297-4aa6-4e0d-ad96-4171967640cb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_738aa9ac-962a-4062-9fb4-798c996d101e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_11434297-4aa6-4e0d-ad96-4171967640cb" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_738aa9ac-962a-4062-9fb4-798c996d101e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_738aa9ac-962a-4062-9fb4-798c996d101e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_738aa9ac-962a-4062-9fb4-798c996d101e" xlink:to="loc_us-gaap_SegmentDomain_738aa9ac-962a-4062-9fb4-798c996d101e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_5b0ba18c-b302-41c8-abf2-01a722c61ca2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_738aa9ac-962a-4062-9fb4-798c996d101e" xlink:to="loc_us-gaap_SegmentDomain_5b0ba18c-b302-41c8-abf2-01a722c61ca2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_ReportableSegmentMember_b23c1bd6-5ae7-4b96-b364-630bd8a58d38" xlink:href="pcty-20251231.xsd#pcty_ReportableSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_5b0ba18c-b302-41c8-abf2-01a722c61ca2" xlink:to="loc_pcty_ReportableSegmentMember_b23c1bd6-5ae7-4b96-b364-630bd8a58d38" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfReportableSegments_8a3a3c87-d5e9-4367-8555-6f36d854f32d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NumberOfReportableSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_4a08e860-46b0-4f5f-8561-1e3429e33de2" xlink:to="loc_us-gaap_NumberOfReportableSegments_8a3a3c87-d5e9-4367-8555-6f36d854f32d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_bbd3f2b3-5b2e-4260-9ce0-dfbbb79dee4e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_4a08e860-46b0-4f5f-8561-1e3429e33de2" xlink:to="loc_us-gaap_Revenues_bbd3f2b3-5b2e-4260-9ce0-dfbbb79dee4e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_CostOfGoodsAndServicesSoldAdjusted_d4899e91-de03-4e94-a81c-f5b4f0b04c9d" xlink:href="pcty-20251231.xsd#pcty_CostOfGoodsAndServicesSoldAdjusted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_4a08e860-46b0-4f5f-8561-1e3429e33de2" xlink:to="loc_pcty_CostOfGoodsAndServicesSoldAdjusted_d4899e91-de03-4e94-a81c-f5b4f0b04c9d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_SellingAndMarketingExpenseAdjusted_6d64b03f-865b-4549-abc0-9350153495f8" xlink:href="pcty-20251231.xsd#pcty_SellingAndMarketingExpenseAdjusted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_4a08e860-46b0-4f5f-8561-1e3429e33de2" xlink:to="loc_pcty_SellingAndMarketingExpenseAdjusted_6d64b03f-865b-4549-abc0-9350153495f8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_ResearchAndDevelopmentExpenseAdjusted_e4cc3eba-0e77-4919-ad44-e66289a70042" xlink:href="pcty-20251231.xsd#pcty_ResearchAndDevelopmentExpenseAdjusted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_4a08e860-46b0-4f5f-8561-1e3429e33de2" xlink:to="loc_pcty_ResearchAndDevelopmentExpenseAdjusted_e4cc3eba-0e77-4919-ad44-e66289a70042" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_GeneralAndAdministrativeExpenseAdjusted_e93a5676-a37e-4de3-8717-8936fe8f559f" xlink:href="pcty-20251231.xsd#pcty_GeneralAndAdministrativeExpenseAdjusted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_4a08e860-46b0-4f5f-8561-1e3429e33de2" xlink:to="loc_pcty_GeneralAndAdministrativeExpenseAdjusted_e93a5676-a37e-4de3-8717-8936fe8f559f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_030afae8-7796-47c0-8c5f-dac1748e0292" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_4a08e860-46b0-4f5f-8561-1e3429e33de2" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_030afae8-7796-47c0-8c5f-dac1748e0292" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_4c887b69-b7fe-455b-a4af-791489252b4d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_4a08e860-46b0-4f5f-8561-1e3429e33de2" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_4c887b69-b7fe-455b-a4af-791489252b4d" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingOtherItemAmount_5466dbef-edaf-494f-9287-c16a9e46e365" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingOtherItemAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_4a08e860-46b0-4f5f-8561-1e3429e33de2" xlink:to="loc_us-gaap_SegmentReportingOtherItemAmount_5466dbef-edaf-494f-9287-c16a9e46e365" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_807af744-3ddd-4f8d-ad06-c537f4579b3d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_4a08e860-46b0-4f5f-8561-1e3429e33de2" xlink:to="loc_us-gaap_NetIncomeLoss_807af744-3ddd-4f8d-ad06-c537f4579b3d" xlink:type="arc" order="9"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://xbrl.sec.gov/ecd/role/IndividualsOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#IndividualsOnly"/>
  <link:definitionLink xlink:role="http://xbrl.sec.gov/ecd/role/IndividualsOnly" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AllIndividualsMember" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_AllIndividualsMember"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_NicholasRostMember_019b4704-1622-78c9-bc3b-cbfd0f343bd8" xlink:href="pcty-20251231.xsd#pcty_NicholasRostMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ecd_AllIndividualsMember" xlink:to="loc_pcty_NicholasRostMember_019b4704-1622-78c9-bc3b-cbfd0f343bd8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_pcty_StevenI.SarowitzMember_019b4704-ce0c-75d9-b944-afbac02a5688" xlink:href="pcty-20251231.xsd#pcty_StevenI.SarowitzMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ecd_AllIndividualsMember" xlink:to="loc_pcty_StevenI.SarowitzMember_019b4704-ce0c-75d9-b944-afbac02a5688" xlink:type="arc" order="3"/>
  </link:definitionLink>
</link:linkbase>
