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| <link:roleRef roleURI="http://usio.com/20231231/role/statement-note-2-property-and-equipment-summary-of-property-and-equipment-details" xlink:href="usio-20231231.xsd#statement-note-2-property-and-equipment-summary-of-property-and-equipment-details" xlink:type="simple"/> |
| <link:calculationLink xlink:role="http://usio.com/20231231/role/statement-note-2-property-and-equipment-summary-of-property-and-equipment-details" xlink:type="extended"> |
| | <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:type="locator"/> |
| | <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentGross" xlink:label="us-gaap_PropertyPlantAndEquipmentGross" xlink:type="locator"/> |
| | <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="us-gaap_PropertyPlantAndEquipmentNet" xlink:type="locator"/> |
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| <link:calculationLink xlink:role="http://usio.com/20231231/role/statement-consolidated-balance-sheets" xlink:type="extended"> |
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| | <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="us-gaap_AccountsReceivableNetCurrent" xlink:type="locator"/> |
| | <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:label="us-gaap_AccruedLiabilitiesCurrent" xlink:type="locator"/> |
| | <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AdditionalPaidInCapital" xlink:label="us-gaap_AdditionalPaidInCapital" xlink:type="locator"/> |
| | <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Assets" xlink:label="us-gaap_Assets" xlink:type="locator"/> |
| | <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AssetsCurrent" xlink:label="us-gaap_AssetsCurrent" xlink:type="locator"/> |
| | <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:type="locator"/> |
| | <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommonStockValue" xlink:label="us-gaap_CommonStockValue" xlink:type="locator"/> |
| | <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredCompensationEquity" xlink:label="us-gaap_DeferredCompensationEquity" xlink:type="locator"/> |
| | <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredIncomeTaxAssetsNet" xlink:label="us-gaap_DeferredIncomeTaxAssetsNet" xlink:type="locator"/> |
| | <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="us-gaap_FiniteLivedIntangibleAssetsNet" xlink:type="locator"/> |
| | <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InventoryNet" xlink:label="us-gaap_InventoryNet" xlink:type="locator"/> |
| | <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Liabilities" xlink:label="us-gaap_Liabilities" xlink:type="locator"/> |
| | <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity" xlink:type="locator"/> |
| | <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilitiesCurrent" xlink:label="us-gaap_LiabilitiesCurrent" xlink:type="locator"/> |
| | <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebtCurrent" xlink:label="us-gaap_LongTermDebtCurrent" xlink:type="locator"/> |
| | <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebtNoncurrent" xlink:label="us-gaap_LongTermDebtNoncurrent" xlink:type="locator"/> |
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| | <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent" xlink:label="us-gaap_OperatingLeaseLiabilityNoncurrent" xlink:type="locator"/> |
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| | <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PreferredStockValue" xlink:label="us-gaap_PreferredStockValue" xlink:type="locator"/> |
| | <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:label="us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:type="locator"/> |
| | <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="us-gaap_PropertyPlantAndEquipmentNet" xlink:type="locator"/> |
| | <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit" xlink:type="locator"/> |
| | <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockholdersEquity" xlink:label="us-gaap_StockholdersEquity" xlink:type="locator"/> |
| | <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TreasuryStockCommonValue" xlink:label="us-gaap_TreasuryStockCommonValue" xlink:type="locator"/> |
| | <link:loc xlink:href="usio-20231231.xsd#usio_AssetsCurrentExcludingMerchantReserves" xlink:label="usio_AssetsCurrentExcludingMerchantReserves" xlink:type="locator"/> |
| | <link:loc xlink:href="usio-20231231.xsd#usio_AssetsNoncurrentExcludingPropertyPlantAndEquipmentNet" xlink:label="usio_AssetsNoncurrentExcludingPropertyPlantAndEquipmentNet" xlink:type="locator"/> |
| | <link:loc xlink:href="usio-20231231.xsd#usio_CustomerDepositsAssetCurrent" xlink:label="usio_CustomerDepositsAssetCurrent" xlink:type="locator"/> |
| | <link:loc xlink:href="usio-20231231.xsd#usio_CustomerDepositsLiabilityCurrent" xlink:label="usio_CustomerDepositsLiabilityCurrent" xlink:type="locator"/> |
| | <link:loc xlink:href="usio-20231231.xsd#usio_LiabilitiesCurrentExcludingRestrictedCash" xlink:label="usio_LiabilitiesCurrentExcludingRestrictedCash" xlink:type="locator"/> |
| | <link:loc xlink:href="usio-20231231.xsd#usio_MerchantReservesCurrent" xlink:label="usio_MerchantReservesCurrent" xlink:type="locator"/> |
| | <link:loc xlink:href="usio-20231231.xsd#usio_PrepaidCardLoadAssetsCurrent" xlink:label="usio_PrepaidCardLoadAssetsCurrent" xlink:type="locator"/> |
| | <link:loc xlink:href="usio-20231231.xsd#usio_PrepaidCardLoadLiabilitiesCurrent" xlink:label="usio_PrepaidCardLoadLiabilitiesCurrent" xlink:type="locator"/> |
| | <link:loc xlink:href="usio-20231231.xsd#usio_RestrictedCashLiabilityCurrent" xlink:label="usio_RestrictedCashLiabilityCurrent" xlink:type="locator"/> |
| | <link:loc xlink:href="usio-20231231.xsd#usio_SettlementProcessingAssets" xlink:label="usio_SettlementProcessingAssets" xlink:type="locator"/> |
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