diff --git a/src/components/Form.js b/src/components/Form.js
index d43c0056d..0fbf47d97 100644
--- a/src/components/Form.js
+++ b/src/components/Form.js
@@ -350,6 +350,8 @@ const Form = () => {
     ) : null;
 
   if (state.startingError) throw state.startingError;
+  const extraStartUrlParams = {};
+  if (initialDataReference) extraStartUrlParams.initial_data_reference = initialDataReference;
 
   // Route the correct page based on URL
   const router = (
@@ -359,7 +361,11 @@ const Form = () => {
         element={<Navigate replace to={introductionPageContent ? 'introductie' : 'startpagina'} />}
       />
 
-      <Route path="introductie" element={<IntroductionPage />} />
+      <Route
+        path="introductie"
+        // Ensure the initialDataReference is preserved when continuing to the Form start
+        element={<IntroductionPage extraParams={extraStartUrlParams} />}
+      />
 
       <Route
         path="startpagina"
@@ -370,6 +376,7 @@ const Form = () => {
               submission={state.submission}
               onFormStart={onFormStart}
               onDestroySession={onDestroySession}
+              initialDataReference={initialDataReference}
             />
           </ErrorBoundary>
         }
diff --git a/src/components/FormStart/index.js b/src/components/FormStart/index.js
index ae0fc9679..70acd9940 100644
--- a/src/components/FormStart/index.js
+++ b/src/components/FormStart/index.js
@@ -41,7 +41,7 @@ const FormStartMessage = ({form}) => {
  * This is shown when the form is initially loaded and provides the explicit user
  * action to start the form, or present the login button (DigiD, eHerkenning...)
  */
-const FormStart = ({form, submission, onFormStart, onDestroySession}) => {
+const FormStart = ({form, submission, onFormStart, onDestroySession, initialDataReference}) => {
   const hasActiveSubmission = !!submission;
   const isAuthenticated = hasActiveSubmission && submission.isAuthenticated;
   const doStart = useStartSubmission();
@@ -121,7 +121,11 @@ const FormStart = ({form, submission, onFormStart, onDestroySession}) => {
             isAuthenticated={isAuthenticated}
           />
         ) : (
-          <LoginOptions form={form} onFormStart={onFormStart} />
+          <LoginOptions
+            form={form}
+            onFormStart={onFormStart}
+            extraParams={{initial_data_reference: initialDataReference}}
+          />
         )}
       </Card>
     </LiteralsProvider>
diff --git a/src/components/FormStart/tests.spec.js b/src/components/FormStart/tests.spec.js
index b648ecbba..f837d88e3 100644
--- a/src/components/FormStart/tests.spec.js
+++ b/src/components/FormStart/tests.spec.js
@@ -10,7 +10,7 @@ import {buildSubmission} from 'api-mocks';
 import useQuery from 'hooks/useQuery';
 
 import FormStart from '.';
-import {testForm} from './fixtures';
+import {testForm, testLoginForm} from './fixtures';
 
 jest.mock('hooks/useQuery');
 let scrollIntoViewMock = jest.fn();
@@ -116,3 +116,26 @@ it('Form start page does not show login buttons if an active submission is prese
   expect(screen.queryByRole('button', {name: 'Continue existing submission'})).toBeInTheDocument();
   expect(screen.queryByRole('button', {name: 'Abort submission'})).toBeInTheDocument();
 });
+
+it('Form start page with initial_data_reference', () => {
+  useQuery.mockReturnValue(new URLSearchParams());
+  const onFormStart = jest.fn();
+  const onDestroySession = jest.fn();
+
+  renderTest(
+    <Wrap>
+      <FormStart
+        form={testLoginForm}
+        onFormStart={onFormStart}
+        onDestroySession={onDestroySession}
+        initialDataReference="1234"
+      />
+    </Wrap>,
+    container
+  );
+  const loginLink = screen.getByRole('link', {name: 'Login with DigiD'});
+  expect(loginLink).toHaveAttribute(
+    'href',
+    'https://openforms.nl/auth/form-name/digid/start?initial_data_reference=1234&next=http%3A%2F%2Flocalhost%2F%3F_start%3D1'
+  );
+});
diff --git a/src/components/IntroductionPage/IntroductionPage.stories.js b/src/components/IntroductionPage/IntroductionPage.stories.js
index 75426d914..1df91fcc2 100644
--- a/src/components/IntroductionPage/IntroductionPage.stories.js
+++ b/src/components/IntroductionPage/IntroductionPage.stories.js
@@ -1,3 +1,4 @@
+import {expect, userEvent, within} from '@storybook/test';
 import {withRouter} from 'storybook-addon-remix-react-router';
 
 import {buildForm} from 'api-mocks';
@@ -48,3 +49,15 @@ export default {
 export const Default = {
   name: 'IntroductionPage',
 };
+
+export const IntroductionPageWithInitialDataReference = {
+  name: 'IntroductionPage with initial data reference',
+  args: {
+    extraParams: {initial_data_reference: '1234'},
+  },
+  play: async ({canvasElement}) => {
+    const canvas = within(canvasElement);
+    const continueLink = canvas.getByRole('link', {name: 'Continue'});
+    await expect(continueLink).toHaveAttribute('href', '/startpagina?initial_data_reference=1234');
+  },
+};
diff --git a/src/components/IntroductionPage/index.js b/src/components/IntroductionPage/index.js
index af64e0694..0b6cb6ee0 100644
--- a/src/components/IntroductionPage/index.js
+++ b/src/components/IntroductionPage/index.js
@@ -9,11 +9,13 @@ import Card from 'components/Card';
 import FAIcon from 'components/FAIcon';
 import Link from 'components/Link';
 
-const IntroductionPage = () => {
+const IntroductionPage = ({extraParams = {}}) => {
   const {name, introductionPageContent = ''} = useContext(FormContext);
   if (!introductionPageContent) {
     return <Navigate replace to="startpagina" />;
   }
+  let startUrl = '/startpagina';
+  if (extraParams) startUrl = `${startUrl}?${new URLSearchParams(extraParams).toString()}`;
   return (
     <Card title={name}>
       <Body
@@ -23,7 +25,7 @@ const IntroductionPage = () => {
       />
 
       <Link
-        to="/startpagina"
+        to={startUrl}
         component={ButtonLink}
         appearance="primary-action-button"
         className="openforms-start-link"
diff --git a/src/components/LoginOptions/index.js b/src/components/LoginOptions/index.js
index f6e173d07..187bd6f11 100644
--- a/src/components/LoginOptions/index.js
+++ b/src/components/LoginOptions/index.js
@@ -9,7 +9,7 @@ import Types from 'types';
 
 import LoginOptionsDisplay from './LoginOptionsDisplay';
 
-const LoginOptions = ({form, onFormStart}) => {
+const LoginOptions = ({form, onFormStart, extraParams = {}}) => {
   const config = useContext(ConfigContext);
 
   const loginAsYourselfOptions = [];
@@ -18,7 +18,7 @@ const LoginOptions = ({form, onFormStart}) => {
 
   form.loginOptions.forEach(option => {
     let readyOption = {...option};
-    readyOption.url = getLoginUrl(option);
+    readyOption.url = getLoginUrl(option, extraParams);
     readyOption.label = (
       <FormattedMessage
         description="Login button label"
@@ -81,6 +81,7 @@ const LoginOptions = ({form, onFormStart}) => {
 LoginOptions.propTypes = {
   form: Types.Form.isRequired,
   onFormStart: PropTypes.func.isRequired,
+  extraParams: PropTypes.object,
 };
 
 export default LoginOptions;