diff --git a/packages/ra-core/src/form/FormDataConsumer.spec.tsx b/packages/ra-core/src/form/FormDataConsumer.spec.tsx
index 6498b370990..a45fc7acc88 100644
--- a/packages/ra-core/src/form/FormDataConsumer.spec.tsx
+++ b/packages/ra-core/src/form/FormDataConsumer.spec.tsx
@@ -140,4 +140,78 @@ describe('FormDataConsumerView', () => {
             });
         });
     });
+
+    it('calls its children with the index when inside an ArrayInput', async () => {
+        let globalIndex;
+
+        render(
+            <AdminContext dataProvider={testDataProvider()}>
+                <ResourceContextProvider value="posts">
+                    <SimpleForm>
+                        <ArrayInput source="authors">
+                            <SimpleFormIterator>
+                                <FormDataConsumer>
+                                    {({ index }) => {
+                                        globalIndex = index;
+                                        return null;
+                                    }}
+                                </FormDataConsumer>
+                            </SimpleFormIterator>
+                        </ArrayInput>
+                    </SimpleForm>
+                </ResourceContextProvider>
+            </AdminContext>
+        );
+
+        expect(globalIndex).toEqual(undefined);
+
+        fireEvent.click(screen.getByLabelText('ra.action.add'));
+
+        expect(globalIndex).toEqual(0);
+
+        fireEvent.click(screen.getByLabelText('ra.action.add'));
+
+        expect(globalIndex).toEqual(1);
+    });
+
+    it('calls its children with the correct index when inside nested ArrayInputs', async () => {
+        let innerIndex: number | undefined;
+
+        render(
+            <AdminContext dataProvider={testDataProvider()}>
+                <ResourceContextProvider value="posts">
+                    <SimpleForm
+                        defaultValues={{
+                            authors: [
+                                {
+                                    books: [{ title: 'Book 1' }],
+                                },
+                            ],
+                        }}
+                    >
+                        <ArrayInput source="authors">
+                            <SimpleFormIterator>
+                                <ArrayInput source="books">
+                                    <SimpleFormIterator>
+                                        <FormDataConsumer>
+                                            {({ index }) => {
+                                                innerIndex = index;
+                                                return null;
+                                            }}
+                                        </FormDataConsumer>
+                                    </SimpleFormIterator>
+                                </ArrayInput>
+                            </SimpleFormIterator>
+                        </ArrayInput>
+                    </SimpleForm>
+                </ResourceContextProvider>
+            </AdminContext>
+        );
+
+        await waitFor(() => {
+            // The inner array's first item should have index 0,
+            // not the outer array's index (also 0 in this case)
+            expect(innerIndex).toEqual(0);
+        });
+    });
 });
diff --git a/packages/ra-core/src/form/FormDataConsumer.tsx b/packages/ra-core/src/form/FormDataConsumer.tsx
index f0f4176ec1e..215d0da6616 100644
--- a/packages/ra-core/src/form/FormDataConsumer.tsx
+++ b/packages/ra-core/src/form/FormDataConsumer.tsx
@@ -77,7 +77,9 @@ export const FormDataConsumerView = <
     // If we have an index, we are in an iterator like component (such as the SimpleFormIterator)
     if (arraySource) {
         const scopedFormData = get(formData, arraySource);
-        result = children({ formData, scopedFormData });
+        const matches = [...arraySource.matchAll(/\d+/g)];
+        const index = Number(matches[matches.length - 1]?.[0]);
+        result = children({ formData, scopedFormData, index });
     } else {
         result = children({ formData });
     }
@@ -98,6 +100,7 @@ export interface FormDataConsumerRenderParams<
 > {
     formData: TFieldValues;
     scopedFormData?: TScopedFieldValues;
+    index?: number;
 }
 
 export type FormDataConsumerRender<