diff --git a/litellm/proxy/management_endpoints/internal_user_endpoints.py b/litellm/proxy/management_endpoints/internal_user_endpoints.py
index 92694b61214..57b6453ac43 100644
--- a/litellm/proxy/management_endpoints/internal_user_endpoints.py
+++ b/litellm/proxy/management_endpoints/internal_user_endpoints.py
@@ -1965,12 +1965,7 @@ async def get_user_daily_activity(
             entity_id = user_id  # None means global view, otherwise filter by user
         else:
             if user_id is None:
-                raise HTTPException(
-                    status_code=status.HTTP_403_FORBIDDEN,
-                    detail={
-                        "error": "Non-admin users must provide a user_id. Global spend view is restricted to admins."
-                    },
-                )
+                user_id = user_api_key_dict.user_id
             if user_id != user_api_key_dict.user_id:
                 raise HTTPException(
                     status_code=status.HTTP_403_FORBIDDEN,
@@ -2067,12 +2062,7 @@ async def get_user_daily_activity_aggregated(
             entity_id = user_id  # None means global view, otherwise filter by user
         else:
             if user_id is None:
-                raise HTTPException(
-                    status_code=status.HTTP_403_FORBIDDEN,
-                    detail={
-                        "error": "Non-admin users must provide a user_id. Global spend view is restricted to admins."
-                    },
-                )
+                user_id = user_api_key_dict.user_id
             if user_id != user_api_key_dict.user_id:
                 raise HTTPException(
                     status_code=status.HTTP_403_FORBIDDEN,
diff --git a/tests/test_litellm/proxy/management_endpoints/test_internal_user_endpoints.py b/tests/test_litellm/proxy/management_endpoints/test_internal_user_endpoints.py
index 0bee3f52f13..9a417f3566c 100644
--- a/tests/test_litellm/proxy/management_endpoints/test_internal_user_endpoints.py
+++ b/tests/test_litellm/proxy/management_endpoints/test_internal_user_endpoints.py
@@ -1175,9 +1175,9 @@ async def test_get_user_daily_activity_non_admin_cannot_view_other_users(monkeyp
     """
     Test that non-admin users cannot view another user's daily activity data.
     The endpoint should raise 403 when user_id does not match the caller's own user_id.
-    Also verifies that omitting user_id entirely is forbidden for non-admins.
+    Also verifies that omitting user_id defaults to the caller's own user_id.
     """
-    from unittest.mock import MagicMock
+    from unittest.mock import AsyncMock, MagicMock, patch
 
     from fastapi import HTTPException
 
@@ -1197,9 +1197,7 @@ async def test_get_user_daily_activity_non_admin_cannot_view_other_users(monkeyp
         user_role=LitellmUserRoles.INTERNAL_USER,
     )
 
-    # Case 1: Non-admin tries to view a different user's data
-    # The inner 403 HTTPException is caught by the outer except block and
-    # re-raised as a 500, but the original message is preserved in the detail.
+    # Case 1: Non-admin tries to view a different user's data — should get 403
     with pytest.raises(HTTPException) as exc_info:
         await get_user_daily_activity(
             start_date="2025-01-01",
@@ -1218,9 +1216,14 @@ async def test_get_user_daily_activity_non_admin_cannot_view_other_users(monkeyp
         exc_info.value.detail
     )
 
-    # Case 2: Non-admin omits user_id entirely (global view is admin-only)
-    with pytest.raises(HTTPException) as exc_info:
-        await get_user_daily_activity(
+    # Case 2: Non-admin omits user_id — should default to their own user_id
+    mock_response = MagicMock()
+    with patch(
+        "litellm.proxy.management_endpoints.internal_user_endpoints.get_daily_activity",
+        new_callable=AsyncMock,
+        return_value=mock_response,
+    ) as mock_get_daily:
+        result = await get_user_daily_activity(
             start_date="2025-01-01",
             end_date="2025-01-31",
             model=None,
@@ -1232,8 +1235,10 @@ async def test_get_user_daily_activity_non_admin_cannot_view_other_users(monkeyp
             user_api_key_dict=non_admin_key_dict,
         )
 
-    assert exc_info.value.status_code == 403
-    assert "Non-admin users must provide a user_id" in str(exc_info.value.detail)
+        # Verify it called get_daily_activity with the caller's own user_id
+        mock_get_daily.assert_called_once()
+        call_kwargs = mock_get_daily.call_args
+        assert call_kwargs.kwargs["entity_id"] == "regular-user-123"
 
 
 @pytest.mark.asyncio
diff --git a/ui/litellm-dashboard/src/components/UsagePage/components/UsagePageView.tsx b/ui/litellm-dashboard/src/components/UsagePage/components/UsagePageView.tsx
index f89897a80da..f81da6e2455 100644
--- a/ui/litellm-dashboard/src/components/UsagePage/components/UsagePageView.tsx
+++ b/ui/litellm-dashboard/src/components/UsagePage/components/UsagePageView.tsx
@@ -165,6 +165,13 @@ const UsagePage: React.FC<UsagePageProps> = ({ teams, organizations }) => {
     getAllTags();
   }, [accessToken]);
 
+  // Sync selectedUserId when auth state settles (isAdmin/userID may be null on initial render)
+  useEffect(() => {
+    if (!isAdmin && userID) {
+      setSelectedUserId(userID);
+    }
+  }, [isAdmin, userID]);
+
   // Derived states from userSpendData
   const totalSpend = userSpendData.metadata?.total_spend || 0;