diff --git a/app/v2/notifications/post_notifications.py b/app/v2/notifications/post_notifications.py
index b40e4e4b6..511155a7e 100644
--- a/app/v2/notifications/post_notifications.py
+++ b/app/v2/notifications/post_notifications.py
@@ -94,7 +94,8 @@ def post_precompiled_letter_notification():
 
     resp = {
         'id': notification.id,
-        'reference': notification.client_reference
+        'reference': notification.client_reference,
+        'postage': notification.postage
     }
 
     return jsonify(resp), 201
diff --git a/tests/app/v2/notifications/test_post_letter_notifications.py b/tests/app/v2/notifications/test_post_letter_notifications.py
index db6cd4159..22232aa73 100644
--- a/tests/app/v2/notifications/test_post_letter_notifications.py
+++ b/tests/app/v2/notifications/test_post_letter_notifications.py
@@ -510,7 +510,7 @@ def test_post_precompiled_letter_notification_returns_201(
     assert notification_history.postage == expected_postage
 
     resp_json = json.loads(response.get_data(as_text=True))
-    assert resp_json == {'id': str(notification.id), 'reference': 'letter-reference'}
+    assert resp_json == {'id': str(notification.id), 'reference': 'letter-reference', 'postage': expected_postage}
 
 
 def test_post_letter_notification_throws_error_for_invalid_postage(client, notify_user, mocker):