diff --git a/events/migrations/0026_event_events_even_project_625413_idx.py b/events/migrations/0026_event_events_even_project_625413_idx.py
new file mode 100644
index 0000000..21321de
--- /dev/null
+++ b/events/migrations/0026_event_events_even_project_625413_idx.py
@@ -0,0 +1,19 @@
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("events", "0025_fix_never_evict"),
+        ("issues", "0025_alter_grouping_project_alter_issue_project"),
+        ("projects", "0016_reset_quota_exceeded_until"),
+    ]
+
+    operations = [
+        migrations.AddIndex(
+            model_name="event",
+            index=models.Index(
+                fields=["project", "digested_at"], name="events_even_project_625413_idx"
+            ),
+        ),
+    ]
diff --git a/events/models.py b/events/models.py
index 02364fd..2427b19 100644
--- a/events/models.py
+++ b/events/models.py
@@ -162,6 +162,7 @@ class Event(models.Model):
         indexes = [
             models.Index(fields=["project", "never_evict", "digested_at", "irrelevance_for_retention"]),
             models.Index(fields=["issue", "digested_at"]),
+            models.Index(fields=["project", "digested_at"]),  # project-wide quota check
         ]
 
     def get_raw_data(self):