diff --git a/src/openforms/registrations/contrib/objects_api/submission_registration.py b/src/openforms/registrations/contrib/objects_api/submission_registration.py
index 5a1a91f0f7..9e86657c5f 100644
--- a/src/openforms/registrations/contrib/objects_api/submission_registration.py
+++ b/src/openforms/registrations/contrib/objects_api/submission_registration.py
@@ -165,7 +165,10 @@ def register_submission_attachment(
 
 
 @contextmanager
-def save_and_raise(registration_data: ObjectsAPIRegistrationData) -> Iterator[None]:
+def save_and_raise(
+    registration_data: ObjectsAPIRegistrationData,
+    submission_attachments: list[ObjectsAPISubmissionAttachment],
+) -> Iterator[None]:
     """Save the registration data before raising a :class:`~openforms.registrations.exceptions.RegistrationFailed` exception."""
 
     try:
@@ -174,6 +177,7 @@ def save_and_raise(registration_data: ObjectsAPIRegistrationData) -> Iterator[No
         raise RegistrationFailed() from e
     finally:
         registration_data.save()
+        ObjectsAPISubmissionAttachment.objects.bulk_create(submission_attachments)
 
 
 OptionsT = TypeVar(
@@ -210,10 +214,11 @@ def save_registration_data(
         registration_data, _ = ObjectsAPIRegistrationData.objects.get_or_create(
             submission=submission
         )
+        submission_attachments: list[ObjectsAPISubmissionAttachment] = []
 
         with (
             get_documents_client() as documents_client,
-            save_and_raise(registration_data),
+            save_and_raise(registration_data, submission_attachments),
         ):
             if not registration_data.pdf_url:
                 registration_data.pdf_url = register_submission_pdf(
@@ -233,11 +238,9 @@ def save_registration_data(
                     )
                 ]
 
-                objs: list[ObjectsAPISubmissionAttachment] = []
-
                 for attachment in submission.attachments:
                     if attachment not in existing:
-                        objs.append(
+                        submission_attachments.append(
                             ObjectsAPISubmissionAttachment(
                                 submission_file_attachment=attachment,
                                 document_url=register_submission_attachment(
@@ -246,8 +249,6 @@ def save_registration_data(
                             )
                         )
 
-                ObjectsAPISubmissionAttachment.objects.bulk_create(objs)
-
     @abstractmethod
     def get_object_data(
         self,
diff --git a/src/openforms/registrations/contrib/objects_api/tests/test_backend.py b/src/openforms/registrations/contrib/objects_api/tests/test_backend.py
index 13697f233a..48608741d0 100644
--- a/src/openforms/registrations/contrib/objects_api/tests/test_backend.py
+++ b/src/openforms/registrations/contrib/objects_api/tests/test_backend.py
@@ -9,9 +9,13 @@
 
 from openforms.registrations.contrib.objects_api.models import (
     ObjectsAPIRegistrationData,
+    ObjectsAPISubmissionAttachment,
 )
 from openforms.registrations.exceptions import RegistrationFailed
-from openforms.submissions.tests.factories import SubmissionFactory
+from openforms.submissions.tests.factories import (
+    SubmissionFactory,
+    SubmissionFileAttachmentFactory,
+)
 
 from ..models import ObjectsAPIConfig
 from ..plugin import PLUGIN_IDENTIFIER, ObjectsAPIRegistration
@@ -104,6 +108,77 @@ def test_csv_creation_fails_pdf_still_saved(self, m: requests_mock.Mocker):
         self.assertEqual(registration_data.pdf_url, pdf["url"])
         self.assertEqual(registration_data.csv_url, "")
 
+    def test_attachment_fails_other_attachments_still_saved(
+        self, m: requests_mock.Mocker
+    ):
+        """Test the behavior when one of the API calls to register an attachment fails.
+
+        The exception should be caught, the first attachment saved, and a
+        ``RegistrationFailed`` should be raised in the end.
+        """
+
+        submission = SubmissionFactory.from_components(
+            [
+                {
+                    "key": "file_1",
+                    "type": "file",
+                },
+                {
+                    "key": "file_2",
+                    "type": "file",
+                },
+            ],
+            completed=True,
+        )
+        submission_step = submission.steps[0]
+        attachment_1 = SubmissionFileAttachmentFactory.create(
+            submission_step=submission_step,
+            file_name="attachment1.jpg",
+            form_key="file_1",
+        )
+        SubmissionFileAttachmentFactory.create(
+            submission_step=submission_step,
+            file_name="attachment2.png",
+            form_key="file_2",
+        )
+
+        jpg_resp = generate_oas_component(
+            "documenten",
+            "schemas/EnkelvoudigInformatieObject",
+            url="https://documenten.nl/api/v1/enkelvoudiginformatieobjecten/1",
+        )
+
+        # OK on JPG attachment request
+        m.post(
+            "https://documenten.nl/api/v1/enkelvoudiginformatieobjecten",
+            status_code=201,
+            json=jpg_resp,
+            additional_matcher=lambda req: req.json()["bestandsnaam"].endswith(".jpg"),
+        )
+
+        # Failure on PNG attachment request (which is dispatched after the JPG one)
+        m.post(
+            "https://documenten.nl/api/v1/enkelvoudiginformatieobjecten",
+            status_code=500,
+            additional_matcher=lambda req: req.json()["bestandsnaam"].endswith(".png"),
+        )
+
+        plugin = ObjectsAPIRegistration(PLUGIN_IDENTIFIER)
+
+        with self.assertRaises(RegistrationFailed):
+            plugin.register_submission(
+                submission,
+                {
+                    "upload_submission_csv": False,
+                    "informatieobjecttype_attachment": "dummy",
+                },
+            )
+
+        attachment = ObjectsAPISubmissionAttachment.objects.filter(
+            submission_file_attachment=attachment_1
+        )
+        self.assertTrue(attachment.exists())
+
     def test_registration_works_after_failure(self, m: requests_mock.Mocker):
         """Test the registration behavior after a failure.