diff --git a/products/warehouse_sources/backend/temporal/data_imports/sources/google_analytics/source.py b/products/warehouse_sources/backend/temporal/data_imports/sources/google_analytics/source.py
index fbaa6a0dc479..b2064b90d8eb 100644
--- a/products/warehouse_sources/backend/temporal/data_imports/sources/google_analytics/source.py
+++ b/products/warehouse_sources/backend/temporal/data_imports/sources/google_analytics/source.py
@@ -65,6 +65,12 @@ def get_non_retryable_errors(self) -> dict[str, str | None]:
             "401 Client Error": "Your Google Analytics connection is invalid or expired. Please reconnect your account.",
             "403 Client Error": "PostHog is not authorized to read this Google Analytics property. Please make sure the connected Google account has access to the property.",
             "ACCESS_TOKEN_SCOPE_INSUFFICIENT": "Insufficient permissions. Please reconnect your Google Analytics account with the required scopes.",
+            # Raised as a bare `RefreshError` from `AuthorizedSession` when the stored refresh token
+            # has been revoked or expired. `validate_credentials` already maps this to a reconnect
+            # prompt, but only runs before a sync starts. Mid-sync it reaches `_run_report` via
+            # `session.post()` before any HTTP status is available to match on, so match Google's
+            # stable OAuth error code instead.
+            "invalid_grant": "Your Google Analytics connection has expired or been revoked. Please reconnect your account.",
         }
 
     def get_retryable_errors(self) -> set[str]:
diff --git a/products/warehouse_sources/backend/temporal/data_imports/sources/google_analytics/tests/test_google_analytics_source.py b/products/warehouse_sources/backend/temporal/data_imports/sources/google_analytics/tests/test_google_analytics_source.py
index 314c7ee1b479..3a3172f2688e 100644
--- a/products/warehouse_sources/backend/temporal/data_imports/sources/google_analytics/tests/test_google_analytics_source.py
+++ b/products/warehouse_sources/backend/temporal/data_imports/sources/google_analytics/tests/test_google_analytics_source.py
@@ -8,6 +8,7 @@
 
 from posthog.models.integration import Integration
 
+from products.warehouse_sources.backend.temporal.data_imports.sources.common.base import error_message_matches
 from products.warehouse_sources.backend.temporal.data_imports.sources.generated_configs.googleanalytics import (
     GoogleAnalyticsSourceConfig,
 )
@@ -262,6 +263,17 @@ def test_non_retryable_errors_cover_auth_failures():
     assert "401 Client Error" in errors
     assert "403 Client Error" in errors
     assert "ACCESS_TOKEN_SCOPE_INSUFFICIENT" in errors
+    assert "invalid_grant" in errors
+
+
+def test_non_retryable_errors_matches_revoked_refresh_token():
+    # `_run_report` refreshes credentials via `session.post()` before any HTTP status is
+    # available, so a revoked/expired refresh token surfaces as a bare `RefreshError` whose
+    # `str()` is the raw (message, response_dict) tuple repr, e.g.:
+    # ('invalid_grant: Bad Request', {'error': 'invalid_grant', 'error_description': 'Bad Request'})
+    observed_error = str(RefreshError("invalid_grant: Bad Request", {"error": "invalid_grant"}))
+    non_retryable_errors = GoogleAnalyticsSource().get_non_retryable_errors()
+    assert error_message_matches(observed_error, non_retryable_errors)
 
 
 def test_retryable_errors_cover_exhausted_quota_retries():