diff --git a/backend/api/serializers/project_serializer.py b/backend/api/serializers/project_serializer.py
index b4493229..caa2cec9 100644
--- a/backend/api/serializers/project_serializer.py
+++ b/backend/api/serializers/project_serializer.py
@@ -2,6 +2,7 @@
 from api.models.group import Group
 from api.models.project import Project
 from api.models.submission import Submission, ExtraCheckResult, StructureCheckResult, StateEnum
+from api.models.checks import ExtraCheck, StructureCheck
 from api.serializers.course_serializer import CourseSerializer
 from django.core.files.uploadedfile import InMemoryUploadedFile
 from django.utils import timezone
@@ -33,6 +34,22 @@ def to_representation(self, instance: Project):
         if (groups_submitted > non_empty_groups):
             non_empty_groups = groups_submitted
 
+        extra_checks_count = instance.extra_checks.count()
+
+        if extra_checks_count:
+            passed_extra_checks_submission_ids = ExtraCheckResult.objects.filter(
+                submission__group__project=instance,
+                submission__is_valid=True,
+                result=StateEnum.SUCCESS
+            ).values_list('submission__id', flat=True)
+
+            passed_extra_checks_group_ids = Submission.objects.filter(
+                id__in=passed_extra_checks_submission_ids
+            ).values_list('group_id', flat=True)
+
+            unique_groups = set(passed_extra_checks_group_ids)
+            extra_checks_passed = len(unique_groups)
+
         passed_structure_checks_submission_ids = StructureCheckResult.objects.filter(
             submission__group__project=instance,
             submission__is_valid=True,
@@ -46,18 +63,12 @@ def to_representation(self, instance: Project):
         unique_groups = set(passed_structure_checks_group_ids)
         structure_checks_passed = len(unique_groups)
 
-        passed_extra_checks_submission_ids = ExtraCheckResult.objects.filter(
-            submission__group__project=instance,
-            submission__is_valid=True,
-            result=StateEnum.SUCCESS
-        ).values_list('submission__id', flat=True)
-
-        passed_extra_checks_group_ids = Submission.objects.filter(
-            id__in=passed_extra_checks_submission_ids
-        ).values_list('group_id', flat=True)
+        # If there are no extra checks, we can set extra_checks_passed equal to structure_checks_passed
+        if not extra_checks_count:
+            extra_checks_passed = structure_checks_passed
 
-        unique_groups = set(passed_extra_checks_group_ids)
-        extra_checks_passed = len(unique_groups)
+        # If the extra checks succeed, the structure checks also succeed
+        structure_checks_passed -= extra_checks_passed
 
         # The total number of passed extra checks combined with the number of passed structure checks
         # can never exceed the total number of submissions (the seeder does not account for this restriction)