diff --git a/readthedocs/audit/tasks.py b/readthedocs/audit/tasks.py
new file mode 100644
index 00000000000..9ca65d07c76
--- /dev/null
+++ b/readthedocs/audit/tasks.py
@@ -0,0 +1,30 @@
+"""Celery tasks related to audit logs."""
+
+import structlog
+from django.conf import settings
+from django.utils import timezone
+
+from readthedocs.audit.models import AuditLog
+from readthedocs.worker import app
+
+log = structlog.get_logger(__name__)
+
+
+@app.task(queue="web")
+def delete_old_personal_audit_logs(days=None):
+    """
+    Delete personal security logs older than `days`.
+
+    If `days` isn't given, default to ``RTD_AUDITLOGS_DEFAULT_RETENTION_DAYS``.
+
+    We delete logs that aren't related to an organization,
+    there are tasks in .com to delete those according to their plan.
+    """
+    days = days or settings.RTD_AUDITLOGS_DEFAULT_RETENTION_DAYS
+    days_ago = timezone.now() - timezone.timedelta(days=days)
+    audit_logs = AuditLog.objects.filter(
+        log_organization_id__isnull=True,
+        created__lt=days_ago,
+    )
+    log.info("Deleting old audit logs.", days=days, count=audit_logs.count())
+    audit_logs.delete()
diff --git a/readthedocs/audit/tests/test_tasks.py b/readthedocs/audit/tests/test_tasks.py
new file mode 100644
index 00000000000..7b3efbc4974
--- /dev/null
+++ b/readthedocs/audit/tests/test_tasks.py
@@ -0,0 +1,115 @@
+from unittest import mock
+
+from django.contrib.auth.models import User
+from django.test import TestCase
+from django.utils import timezone
+from django_dynamic_fixture import get
+
+from readthedocs.audit.models import AuditLog
+from readthedocs.audit.tasks import delete_old_personal_audit_logs
+from readthedocs.organizations.models import Organization
+from readthedocs.projects.models import Project
+
+
+class AuditTasksTest(TestCase):
+    def setUp(self):
+        self.user = get(User)
+        self.project = get(
+            Project,
+            slug="project",
+        )
+        self.organization = get(
+            Organization,
+            owners=[self.user],
+            name="testorg",
+        )
+        self.organization.projects.add(self.project)
+
+        self.another_user = get(User)
+        self.another_project = get(
+            Project,
+            slug="another-project",
+            users=[self.user],
+        )
+
+    @mock.patch("django.utils.timezone.now")
+    def test_delete_old_personal_audit_logs(self, now_mock):
+        now_mock.return_value = timezone.datetime(
+            year=2021,
+            month=5,
+            day=5,
+        )
+        newer_date = timezone.datetime(
+            year=2021,
+            month=4,
+            day=30,
+        )
+        middle_date = timezone.datetime(
+            year=2021,
+            month=4,
+            day=5,
+        )
+        old_date = timezone.datetime(
+            year=2021,
+            month=3,
+            day=20,
+        )
+        for date in [newer_date, middle_date, old_date]:
+            for user in [self.user, self.another_user]:
+                # Log attached to a project and organization.
+                get(
+                    AuditLog,
+                    user=user,
+                    project=self.project,
+                    created=date,
+                    action=AuditLog.PAGEVIEW,
+                )
+                # Log attached to a project only.
+                get(
+                    AuditLog,
+                    user=user,
+                    project=self.another_project,
+                    created=date,
+                    action=AuditLog.PAGEVIEW,
+                )
+
+                # Log attached to the user only.
+                get(
+                    AuditLog,
+                    user=user,
+                    created=date,
+                    action=AuditLog.AUTHN,
+                )
+
+            # Log without a user.
+            get(
+                AuditLog,
+                created=date,
+                action=AuditLog.AUTHN_FAILURE,
+            )
+
+            # Log with a organization, and without a user.
+            get(
+                AuditLog,
+                project=self.project,
+                created=date,
+                action=AuditLog.AUTHN_FAILURE,
+            )
+
+        self.assertEqual(AuditLog.objects.all().count(), 24)
+
+        # We don't have logs older than 90 days.
+        delete_old_personal_audit_logs(days=90)
+        self.assertEqual(AuditLog.objects.all().count(), 24)
+
+        # Only 5 logs can be deteled.
+        delete_old_personal_audit_logs(days=30)
+        self.assertEqual(AuditLog.objects.all().count(), 19)
+
+        # Only 5 logs can be deteled.
+        delete_old_personal_audit_logs(days=10)
+        self.assertEqual(AuditLog.objects.all().count(), 14)
+
+        # Only 5 logs can be deteled.
+        delete_old_personal_audit_logs(days=1)
+        self.assertEqual(AuditLog.objects.all().count(), 9)
diff --git a/readthedocs/settings/base.py b/readthedocs/settings/base.py
index aea644da688..c1af4307f6a 100644
--- a/readthedocs/settings/base.py
+++ b/readthedocs/settings/base.py
@@ -435,6 +435,11 @@ def TEMPLATES(self):
             'schedule': crontab(minute=0, hour=2),
             'options': {'queue': 'web'},
         },
+        'weekly-delete-old-personal-audit-logs': {
+            'task': 'readthedocs.audit.tasks.delete_old_personal_audit_logs',
+            'schedule': crontab(day_of_week='wednesday', minute=0, hour=7),
+            'options': {'queue': 'web'},
+        },
         'every-day-resync-sso-organization-users': {
             'task': 'readthedocs.oauth.tasks.sync_remote_repositories_organizations',
             'schedule': crontab(minute=0, hour=4),