diff --git a/src/libs/CardUtils.ts b/src/libs/CardUtils.ts
index 0c2d5ff3921ec..f1e97dc1fe2b8 100644
--- a/src/libs/CardUtils.ts
+++ b/src/libs/CardUtils.ts
@@ -1,5 +1,5 @@
 import type {FeedKeysWithAssignedCards} from '@selectors/Card';
-import {fromUnixTime, isBefore} from 'date-fns';
+import {format, fromUnixTime, isBefore} from 'date-fns';
 import groupBy from 'lodash/groupBy';
 import type {OnyxCollection, OnyxEntry} from 'react-native-onyx';
 import type {TupleToUnion, ValueOf} from 'type-fest';
@@ -840,6 +840,19 @@ function getDefaultCardName(cardholder?: string) {
     return `${cardholder}'s card`;
 }
 
+/**
+ * Gets the start date for a card assignment.
+ * When not editing, always returns the current date.
+ * When editing, returns the existing start date or current date as fallback.
+ *
+ * @param isEditing - Whether the card assignment is being edited
+ * @param existingStartDate - The existing start date from previous assignment
+ * @returns Formatted start date string in yyyy-MM-dd format
+ */
+function getCardAssignmentStartDate(isEditing: boolean | undefined, existingStartDate?: string): string {
+    return isEditing ? (existingStartDate ?? format(new Date(), CONST.DATE.FNS_FORMAT_STRING)) : format(new Date(), CONST.DATE.FNS_FORMAT_STRING);
+}
+
 function checkIfNewFeedConnected(prevFeedsData: CompanyFeeds, currentFeedsData: CompanyFeeds, plaidBank?: string) {
     const prevFeeds = Object.keys(prevFeedsData);
     const currentFeeds = Object.keys(currentFeedsData);
@@ -1196,6 +1209,7 @@ export {
     hasOnlyOneCardToAssign,
     checkIfNewFeedConnected,
     getDefaultCardName,
+    getCardAssignmentStartDate,
     getDomainOrWorkspaceAccountID,
     mergeCardListWithWorkspaceFeeds,
     isCard,
diff --git a/src/pages/workspace/companyCards/assignCard/AssigneeStep.tsx b/src/pages/workspace/companyCards/assignCard/AssigneeStep.tsx
index 646c17b2a04b5..a55201316e514 100644
--- a/src/pages/workspace/companyCards/assignCard/AssigneeStep.tsx
+++ b/src/pages/workspace/companyCards/assignCard/AssigneeStep.tsx
@@ -1,4 +1,3 @@
-import {format} from 'date-fns';
 import {Str} from 'expensify-common';
 import React, {useEffect, useMemo, useState} from 'react';
 import {Keyboard} from 'react-native';
@@ -16,7 +15,7 @@ import useSearchSelector from '@hooks/useSearchSelector';
 import useThemeStyles from '@hooks/useThemeStyles';
 import {setDraftInviteAccountID} from '@libs/actions/Card';
 import {searchInServer} from '@libs/actions/Report';
-import {getDefaultCardName} from '@libs/CardUtils';
+import {getCardAssignmentStartDate, getDefaultCardName} from '@libs/CardUtils';
 import type {PlatformStackScreenProps} from '@libs/Navigation/PlatformStackNavigation/types';
 import type {SettingsNavigatorParamList} from '@libs/Navigation/types';
 import {getHeaderMessage, getSearchValueForPhoneOrEmail, sortAlphabetically} from '@libs/OptionsListUtils';
@@ -92,9 +91,7 @@ function AssigneeStep({route}: AssigneeStepProps) {
                 cardToAssign.encryptedCardNumber = assignCard.cardToAssign.encryptedCardNumber;
                 cardToAssign.cardName = assignCard.cardToAssign.cardName;
                 cardToAssign.customCardName = assignCard.cardToAssign.customCardName ?? defaultCardName;
-                cardToAssign.startDate = !isEditing
-                    ? format(new Date(), CONST.DATE.FNS_FORMAT_STRING)
-                    : (assignCard?.cardToAssign?.startDate ?? format(new Date(), CONST.DATE.FNS_FORMAT_STRING));
+                cardToAssign.startDate = getCardAssignmentStartDate(isEditing, assignCard?.cardToAssign?.startDate);
                 cardToAssign.dateOption = !isEditing
                     ? CONST.COMPANY_CARD.TRANSACTION_START_DATE_OPTIONS.CUSTOM
                     : (assignCard?.cardToAssign?.dateOption ?? CONST.COMPANY_CARD.TRANSACTION_START_DATE_OPTIONS.CUSTOM);
@@ -129,9 +126,7 @@ function AssigneeStep({route}: AssigneeStepProps) {
             cardToAssign.encryptedCardNumber = assignCard.cardToAssign.encryptedCardNumber;
             cardToAssign.cardName = assignCard.cardToAssign.cardName;
             cardToAssign.customCardName = assignCard.cardToAssign.customCardName ?? defaultCardName;
-            cardToAssign.startDate = !isEditing
-                ? format(new Date(), CONST.DATE.FNS_FORMAT_STRING)
-                : (assignCard?.cardToAssign?.startDate ?? format(new Date(), CONST.DATE.FNS_FORMAT_STRING));
+            cardToAssign.startDate = getCardAssignmentStartDate(isEditing, assignCard?.cardToAssign?.startDate);
             cardToAssign.dateOption = !isEditing
                 ? CONST.COMPANY_CARD.TRANSACTION_START_DATE_OPTIONS.CUSTOM
                 : (assignCard?.cardToAssign?.dateOption ?? CONST.COMPANY_CARD.TRANSACTION_START_DATE_OPTIONS.CUSTOM);
diff --git a/src/pages/workspace/companyCards/assignCard/InviteNewMemberStep.tsx b/src/pages/workspace/companyCards/assignCard/InviteNewMemberStep.tsx
index 6494fd2a0c5d2..4377fcd4b6631 100644
--- a/src/pages/workspace/companyCards/assignCard/InviteNewMemberStep.tsx
+++ b/src/pages/workspace/companyCards/assignCard/InviteNewMemberStep.tsx
@@ -7,7 +7,7 @@ import useCardsList from '@hooks/useCardsList';
 import useLocalize from '@hooks/useLocalize';
 import useOnyx from '@hooks/useOnyx';
 import {setDraftInviteAccountID} from '@libs/actions/Card';
-import {getDefaultCardName, getFilteredCardList, hasOnlyOneCardToAssign} from '@libs/CardUtils';
+import {getCardAssignmentStartDate, getDefaultCardName, getFilteredCardList, hasOnlyOneCardToAssign} from '@libs/CardUtils';
 import type {PlatformStackScreenProps} from '@libs/Navigation/PlatformStackNavigation/types';
 import type {SettingsNavigatorParamList} from '@libs/Navigation/types';
 import Navigation from '@navigation/Navigation';
@@ -63,7 +63,7 @@ function InviteNewMemberStep({route, currentUserPersonalDetails}: InviteeNewMemb
             cardToAssign.encryptedCardNumber = assignCard.cardToAssign.encryptedCardNumber;
             cardToAssign.cardName = assignCard.cardToAssign.cardName;
             cardToAssign.customCardName = assignCard.cardToAssign.customCardName ?? defaultCardName;
-            cardToAssign.startDate = assignCard?.cardToAssign?.startDate ?? new Date().toISOString().split('T').at(0);
+            cardToAssign.startDate = getCardAssignmentStartDate(true, assignCard?.cardToAssign?.startDate);
             cardToAssign.dateOption = assignCard?.cardToAssign?.dateOption ?? CONST.COMPANY_CARD.TRANSACTION_START_DATE_OPTIONS.CUSTOM;
             setAssignCardStepAndData({
                 currentStep: CONST.COMPANY_CARD.STEP.CONFIRMATION,
@@ -75,7 +75,7 @@ function InviteNewMemberStep({route, currentUserPersonalDetails}: InviteeNewMemb
             const onlyCard = filteredCardList.at(0);
             cardToAssign.cardName = onlyCard?.cardName;
             cardToAssign.encryptedCardNumber = onlyCard?.cardID;
-            cardToAssign.startDate = assignCard?.cardToAssign?.startDate ?? new Date().toISOString().split('T').at(0);
+            cardToAssign.startDate = getCardAssignmentStartDate(true, assignCard?.cardToAssign?.startDate);
             cardToAssign.dateOption = assignCard?.cardToAssign?.dateOption ?? CONST.COMPANY_CARD.TRANSACTION_START_DATE_OPTIONS.CUSTOM;
             setAssignCardStepAndData({
                 currentStep: CONST.COMPANY_CARD.STEP.CONFIRMATION,