diff --git a/src/components/Contacts/ContactDetails/ContactDonationsTab/PartnershipInfo/EditPartnershipInfoModal/EditPartnershipInfoModal.test.tsx b/src/components/Contacts/ContactDetails/ContactDonationsTab/PartnershipInfo/EditPartnershipInfoModal/EditPartnershipInfoModal.test.tsx
index d2b0aa5c0..409ff4e26 100644
--- a/src/components/Contacts/ContactDetails/ContactDonationsTab/PartnershipInfo/EditPartnershipInfoModal/EditPartnershipInfoModal.test.tsx
+++ b/src/components/Contacts/ContactDetails/ContactDonationsTab/PartnershipInfo/EditPartnershipInfoModal/EditPartnershipInfoModal.test.tsx
@@ -434,6 +434,22 @@ describe('EditPartnershipInfoModal', () => {
     expect(handleClose).toHaveBeenCalled();
   });
 
+  it('should allow for user to remove the start date', async () => {
+    const { getByLabelText, getByText, findByText } = render(<Components />);
+    const datePickerButton = getByLabelText('Start Date');
+    userEvent.click(datePickerButton);
+    userEvent.click(await findByText('Clear'));
+    userEvent.click(getByText('Save'));
+
+    await waitFor(() =>
+      expect(mutationSpy).toHaveGraphqlOperation('UpdateContactPartnership', {
+        attributes: {
+          pledgeStartDate: null,
+        },
+      }),
+    );
+  });
+
   it('should handle editing newsletter', async () => {
     const { getByRole } = render(<Components />);
 
diff --git a/src/components/Contacts/ContactDetails/ContactDonationsTab/PartnershipInfo/EditPartnershipInfoModal/EditPartnershipInfoModal.tsx b/src/components/Contacts/ContactDetails/ContactDonationsTab/PartnershipInfo/EditPartnershipInfoModal/EditPartnershipInfoModal.tsx
index 6efe37fe0..7b40dc5ab 100644
--- a/src/components/Contacts/ContactDetails/ContactDonationsTab/PartnershipInfo/EditPartnershipInfoModal/EditPartnershipInfoModal.tsx
+++ b/src/components/Contacts/ContactDetails/ContactDonationsTab/PartnershipInfo/EditPartnershipInfoModal/EditPartnershipInfoModal.tsx
@@ -137,7 +137,7 @@ export const EditPartnershipInfoModal: React.FC<
         accountListId: accountListId ?? '',
         attributes: {
           ...attributes,
-          pledgeStartDate: attributes.pledgeStartDate?.toISODate(),
+          pledgeStartDate: attributes.pledgeStartDate?.toISODate() ?? null,
           nextAsk: attributes.nextAsk?.toISODate() ?? null,
           primaryPersonId: attributes.primaryPersonId,
         },