diff --git a/litellm/proxy/config_resolvers/__init__.py b/litellm/proxy/config_resolvers/__init__.py
index eee760df458..f031a8d74b9 100644
--- a/litellm/proxy/config_resolvers/__init__.py
+++ b/litellm/proxy/config_resolvers/__init__.py
@@ -5,6 +5,17 @@ from litellm.proxy.config_resolvers._descriptors import (
     FieldSource,
     resolve_fields,
 )
-from litellm.proxy.config_resolvers.settings_store import SettingsStore, config_ownership_message
+from litellm.proxy.config_resolvers.settings_store import (
+    SettingsStore,
+    config_ownership_message,
+    source_for,
+)
 
-__all__ = ("FieldDescriptor", "FieldSource", "SettingsStore", "config_ownership_message", "resolve_fields")
+__all__ = (
+    "FieldDescriptor",
+    "FieldSource",
+    "SettingsStore",
+    "config_ownership_message",
+    "resolve_fields",
+    "source_for",
+)
diff --git a/litellm/proxy/config_resolvers/settings_store.py b/litellm/proxy/config_resolvers/settings_store.py
index 291000b3b6a..f05af3de03a 100644
--- a/litellm/proxy/config_resolvers/settings_store.py
+++ b/litellm/proxy/config_resolvers/settings_store.py
@@ -176,3 +176,10 @@ class SettingsStore(MutableMapping[str, JsonValue]):
     def _resolution_for(self, key: str) -> Resolved:
         yaml_value: Final[SettingValue] = self._yaml_values.get(key, ABSENT)
         return resolve(yaml_value, self._db_value(key))
+
+
+def source_for(settings: SettingsStore, key: str, default: object = None) -> FieldSource:
+    source: Final = settings.source(key)
+    if source == "unset":
+        return "default" if default is not None else "unset"
+    return source
diff --git a/litellm/proxy/management_endpoints/router_settings_endpoints.py b/litellm/proxy/management_endpoints/router_settings_endpoints.py
index fc000b1638b..d6d74ada35a 100644
--- a/litellm/proxy/management_endpoints/router_settings_endpoints.py
+++ b/litellm/proxy/management_endpoints/router_settings_endpoints.py
@@ -8,6 +8,8 @@ GET /router/fields - Get router settings field definitions without values (for U
 """
 
 import inspect
+from collections.abc import Mapping
+from types import MappingProxyType
 from typing import Any, Final, get_args
 
 from fastapi import APIRouter, Depends
@@ -16,6 +18,7 @@ from pydantic import BaseModel, Field
 from litellm._logging import verbose_proxy_logger
 from litellm.proxy._types import UserAPIKeyAuth
 from litellm.proxy.auth.user_api_key_auth import user_api_key_auth
+from litellm.proxy.config_resolvers import FieldSource, SettingsStore, source_for
 from litellm.router import Router
 from litellm.types.management_endpoints import (
     ROUTER_SETTINGS_FIELDS,
@@ -30,6 +33,7 @@ class RouterSettingsResponse(BaseModel):
     fields: list[RouterSettingsField] = Field(description="List of all configurable router settings with metadata")
     current_values: dict[str, Any] = Field(description="Current values of router settings")
     routing_strategy_descriptions: dict[str, str] = Field(description="Descriptions for each routing strategy option")
+    source: dict[str, FieldSource] = Field(description="Source of each current router setting")
 
 
 class RouterFieldsResponse(BaseModel):
@@ -39,6 +43,18 @@ class RouterFieldsResponse(BaseModel):
     routing_strategy_descriptions: dict[str, str] = Field(description="Descriptions for each routing strategy option")
 
 
+def _router_setting_source(
+    settings: SettingsStore,
+    key: str,
+    current_value: object,
+    field_default: object,
+) -> FieldSource:
+    source: Final = source_for(settings, key, field_default)
+    if source != "unset":
+        return source
+    return "default" if current_value is not None else "unset"
+
+
 def _get_routing_strategies_from_router_class() -> list[str]:
     """
     Dynamically extract routing strategies from the Router class __init__ method.
@@ -109,15 +125,29 @@ async def get_router_settings(
         # Merge with config values (config takes precedence)
         current_values.update(router_settings_from_config)
 
-        # Update field values with current values
         for field in router_fields:
             if field.field_name in current_values:
                 field.field_value = current_values[field.field_name]
 
+        field_defaults: Final[Mapping[str, object]] = MappingProxyType(
+            {field.field_name: field.field_default for field in router_fields}
+        )
+        source: Final[Mapping[str, FieldSource]] = MappingProxyType(
+            {
+                key: _router_setting_source(
+                    proxy_config.router_settings,
+                    key,
+                    current_values[key],
+                    field_defaults.get(key),
+                )
+                for key in current_values
+            }
+        )
         return RouterSettingsResponse(
             fields=router_fields,
             current_values=current_values,
             routing_strategy_descriptions=ROUTING_STRATEGY_DESCRIPTIONS,
+            source=source,
         )
     except Exception as e:
         verbose_proxy_logger.error("Error fetching router settings: %s", e)
diff --git a/litellm/proxy/proxy_server.py b/litellm/proxy/proxy_server.py
index 8111e21e114..e22da5b190a 100644
--- a/litellm/proxy/proxy_server.py
+++ b/litellm/proxy/proxy_server.py
@@ -50,6 +50,7 @@ import anyio
 import websockets
 import websockets.exceptions
 from pydantic import BaseModel, Json, JsonValue, TypeAdapter, ValidationError
+from pydantic.fields import FieldInfo, PydanticUndefined
 from typing_extensions import NotRequired, ReadOnly, assert_never
 
 from litellm._uuid import uuid
@@ -456,7 +457,13 @@ from litellm.proxy.common_utils.user_api_key_cache import (
     project_spend_counter_key,
     tag_cache_key,
 )
-from litellm.proxy.config_resolvers import SettingsStore, config_ownership_message, resolve_fields
+from litellm.proxy.config_resolvers import (
+    FieldSource,
+    SettingsStore,
+    config_ownership_message,
+    resolve_fields,
+    source_for,
+)
 from litellm.proxy.config_resolvers.alerting import (
     EMAIL_DESCRIPTORS,
     MS_TEAMS_DESCRIPTORS,
@@ -4951,6 +4958,12 @@ def _as_settings_mapping(value: object) -> Mapping[str, SettingsJsonValue]:
     return _SETTINGS_MAPPING.validate_python(value)
 
 
+def _get_field_default(field_info: FieldInfo) -> JsonValue:
+    if field_info.default is PydanticUndefined:
+        return None
+    return cast(JsonValue, field_info.default)  # cast-ok: Pydantic field defaults are JSON values at runtime
+
+
 def _bind_general_settings_store(settings: SettingsStore) -> None:
     global general_settings
     general_settings = settings  # pyright: ignore[reportAssignmentType]  # legacy global accepts mappings
@@ -16006,6 +16019,22 @@ async def model_settings():
 #### ALERTING MANAGEMENT ENDPOINTS ####
 
 
+def _nested_setting_source(
+    settings: SettingsStore,
+    db_values: Mapping[str, JsonValue],
+    parent_key: str,
+    field_name: str,
+    field_default: JsonValue,
+) -> FieldSource:
+    unset_source: Final[FieldSource] = "default" if field_default is not None else "unset"
+    parent_value: Final = settings.config_value(parent_key)
+    if isinstance(parent_value, Mapping) and field_name in parent_value:
+        return "config"
+    if settings.owned_by_config(parent_key):
+        return unset_source
+    return "db" if field_name in db_values else unset_source
+
+
 @router.get(
     "/alerting/settings",
     description="Return the configurable alerting param, description, and current value",
@@ -16043,17 +16072,20 @@ async def alerting_settings(
         where={"param_name": "general_settings"}
     )
 
-    if db_general_settings is not None and db_general_settings.param_value is not None:
-        db_general_settings_dict: Final = dict(db_general_settings.param_value)
-        alerting_args_dict: dict = cast(  # cast-ok: ConfigGeneralSettings validates alerting_args as a dict on write
-            dict[str, JsonValue], db_general_settings_dict.get("alerting_args", {})
-        )
-        alerting_values: list | None = cast(  # cast-ok: ConfigGeneralSettings validates alerting as a list on write
-            list[JsonValue] | None, db_general_settings_dict.get("alerting")
-        )
-    else:
-        alerting_args_dict = {}
-        alerting_values = None
+    db_general_settings_dict: Final[Mapping[str, JsonValue]] = MappingProxyType(
+        dict(db_general_settings.param_value)  # mutable-ok: Prisma returns the JSON column as a plain dict
+        if db_general_settings is not None and db_general_settings.param_value is not None
+        else {}
+    )
+    alerting_args_value: Final = db_general_settings_dict.get("alerting_args")
+    alerting_args_dict: Final[Mapping[str, JsonValue]] = MappingProxyType(
+        alerting_args_value if isinstance(alerting_args_value, dict) else {}
+    )
+    alerting_values: Final = cast(  # cast-ok: alerting is stored as a JSON list when present
+        list[JsonValue] | None, db_general_settings_dict.get("alerting")
+    )
+
+    settings: Final = proxy_config.settings
 
     allowed_args: Final = MappingProxyType(
         {
@@ -16082,9 +16114,9 @@ async def alerting_settings(
 
     is_slack_enabled = False
 
-    if general_settings.get("alerting") and isinstance(general_settings["alerting"], list):
-        if "slack" in general_settings["alerting"]:
-            is_slack_enabled = True
+    alerting: Final = settings.get("alerting")
+    if isinstance(alerting, list) and "slack" in alerting:
+        is_slack_enabled = True
 
     _response_obj = ConfigList(
         field_name="slack_alerting",
@@ -16092,6 +16124,7 @@ async def alerting_settings(
         field_description="Enable slack alerting for monitoring proxy in production: llm outages, budgets, spend tracking failures.",
         field_value=is_slack_enabled,
         stored_in_db=True if alerting_values is not None else False,
+        source=source_for(settings, "alerting"),
         field_default_value=None,
         premium_field=False,
     )
@@ -16099,6 +16132,7 @@ async def alerting_settings(
 
     for field_name, field_info in SlackAlertingArgs.model_fields.items():
         if field_name in allowed_args:
+            field_default: JsonValue = _get_field_default(field_info)
             _stored_in_db: bool | None = None
             if field_name in alerting_args_dict:
                 _stored_in_db = True
@@ -16109,9 +16143,16 @@ async def alerting_settings(
                 field_name=field_name,
                 field_type=allowed_args[field_name],
                 field_description=field_info.description or "",
-                field_value=_slack_alerting_args_dict.get(field_name, None),
+                field_value=_slack_alerting_args_dict.get(field_name, field_default),
                 stored_in_db=_stored_in_db,
-                field_default_value=field_info.default,
+                source=_nested_setting_source(
+                    settings,
+                    alerting_args_dict,
+                    "alerting_args",
+                    field_name,
+                    field_default,
+                ),
+                field_default_value=field_default,
                 premium_field=(True if field_name == "region_outage_alert_ttl" else False),
             )
             return_val.append(_response_obj)
diff --git a/litellm/proxy/ui_crud_endpoints/proxy_setting_endpoints.py b/litellm/proxy/ui_crud_endpoints/proxy_setting_endpoints.py
index 7bdadeadf86..f4d4ccf5851 100644
--- a/litellm/proxy/ui_crud_endpoints/proxy_setting_endpoints.py
+++ b/litellm/proxy/ui_crud_endpoints/proxy_setting_endpoints.py
@@ -15,8 +15,8 @@ from typing import (
 from urllib.parse import urlparse
 
 from fastapi import APIRouter, Body, Depends, File, HTTPException, UploadFile
-from pydantic import ConfigDict, JsonValue, TypeAdapter, ValidationError, create_model
-from pydantic.fields import FieldInfo
+from pydantic import BaseModel, ConfigDict, JsonValue, TypeAdapter, ValidationError, create_model
+from pydantic.fields import FieldInfo, PydanticUndefined
 from typing_extensions import NotRequired, ReadOnly, TypedDict
 
 import litellm
@@ -25,6 +25,7 @@ from litellm.litellm_core_utils.sensitive_data_masker import mask_sensitive_keys
 from litellm.proxy._experimental.mcp_server.tool_search import MCP_TOOL_SEARCH_SETTINGS_KEY
 from litellm.proxy._types import *
 from litellm.proxy.auth.user_api_key_auth import user_api_key_auth
+from litellm.proxy.config_resolvers import FieldSource, SettingsStore, source_for
 from litellm.proxy.config_resolvers.settings_store import ConfigOwnedKeyError
 from litellm.proxy.config_resolvers.sso import (
     SSO_FIELD_ENV_VARS,
@@ -35,7 +36,10 @@ from litellm.proxy.management_endpoints.team_admin_field_permissions import (
     SUPPORTED_TEAM_ADMIN_PERMISSIONS,
     TEAM_ADMIN_EDITABLE_TEAM_FIELDS_SETTING,
 )
-from litellm.proxy.spend_tracking.ptu_feature_flag import is_ptu_cost_attribution_enabled
+from litellm.proxy.spend_tracking.ptu_feature_flag import (
+    PTU_COST_ATTRIBUTION_ENV_VAR,
+    is_ptu_cost_attribution_enabled,
+)
 from litellm.proxy.utils import invalidate_config_param
 from litellm.repositories.config_repository import ConfigRepository
 from litellm.repositories.organization_repository import OrganizationRepository
@@ -45,6 +49,7 @@ from litellm.repositories.table_repositories import (
     UISettingsRepository,
 )
 from litellm.repositories.team_repository import TeamRepository
+from litellm.secret_managers.main import get_secret
 from litellm.types.mcp import MCPToolSearchSettings
 from litellm.types.proxy.management_endpoints.ui_sso import (
     DefaultTeamSSOParams,
@@ -199,6 +204,11 @@ class SettingsResponse(BaseModel):
     """Schema information including descriptions and property types for UI display"""
 
 
+class _SettingsWithSchema(BaseModel):
+    values: dict[str, object]
+    field_schema: dict[str, object]
+
+
 class SSOSettingsResponse(SettingsResponse):
     """Response model for SSO settings"""
 
@@ -330,6 +340,8 @@ class UISettings(BaseModel):
 class UISettingsResponse(SettingsResponse):
     """Response model for UI settings"""
 
+    source: dict[str, FieldSource]
+
 
 # Allowlist of UI settings that can be stored
 ALLOWED_UI_SETTINGS_FIELDS: Final = {
@@ -748,6 +760,25 @@ def _root_schema(settings_class: type[BaseModel]) -> _RootSchema:
     )
 
 
+def _model_field_default(settings_class: type[BaseModel], field_name: str) -> object:
+    field_info: Final = settings_class.model_fields.get(field_name)
+    if field_info is None or field_info.default is PydanticUndefined:
+        return None
+    return cast(object, field_info.default)  # cast-ok: Pydantic field defaults are untyped
+
+
+def _ui_setting_source(
+    key: str,
+    value: object,
+    settings: SettingsStore,
+    settings_class: type[BaseModel],
+) -> FieldSource:
+    if key == ENABLE_PTU_COST_ATTRIBUTION_UI_SETTING:
+        configured_value: Final = get_secret(PTU_COST_ATTRIBUTION_ENV_VAR, None)
+        return "config" if configured_value is not None or value is True else "default"
+    return source_for(settings, key, _model_field_default(settings_class, key))
+
+
 async def _get_settings_with_schema(
     settings_key: str,
     settings_class: type[BaseModel],
@@ -1705,7 +1736,7 @@ async def get_ui_settings():
     Get UI-specific configuration flags.
     All authenticated users can fetch these settings for client-side behavior.
     """
-    from litellm.proxy.proxy_server import prisma_client
+    from litellm.proxy.proxy_server import prisma_client, proxy_config
 
     if prisma_client is None:
         raise HTTPException(
@@ -1730,20 +1761,43 @@ async def get_ui_settings():
 
     await user_api_key_cache.async_set_cache(key=UI_SETTINGS_CACHE_KEY, value=ui_settings, ttl=UI_SETTINGS_CACHE_TTL)
 
-    # Build config-like object for schema helper
-    config: Final[dict[str, object]] = {"litellm_settings": {"ui_settings": ui_settings}}
-
-    settings: Final = await _get_settings_with_schema(
-        settings_key="ui_settings",
-        settings_class=_get_effective_ui_settings_class(),
-        config=config,
+    effective_ui_settings: Final[Mapping[str, object]] = MappingProxyType(
+        {
+            **ui_settings,
+            **{key: proxy_config.settings[key] for key in ALLOWED_UI_SETTINGS_FIELDS if key in proxy_config.settings},
+        }
+    )
+    config: Final[Mapping[str, object]] = MappingProxyType(
+        {"litellm_settings": MappingProxyType({"ui_settings": effective_ui_settings})}
+    )
+    settings_class: Final = _get_effective_ui_settings_class()
+    resolved_settings: Final = _SettingsWithSchema.model_validate(
+        await _get_settings_with_schema(
+            settings_key="ui_settings",
+            settings_class=settings_class,
+            config=config,
+        )
+    )
+    values: Final[Mapping[str, object]] = MappingProxyType(
+        {
+            **resolved_settings.values,
+            ENABLE_PTU_COST_ATTRIBUTION_UI_SETTING: is_ptu_cost_attribution_enabled(),
+        }
+    )
+    source: Final[Mapping[str, FieldSource]] = MappingProxyType(
+        {
+            key: (
+                _ui_setting_source(key, values[key], proxy_config.settings, settings_class)
+                if key in proxy_config.settings or key not in ui_settings
+                else "db"
+            )
+            for key in values
+        }
     )
     return UISettingsResponse(
-        values={
-            **settings["values"],
-            ENABLE_PTU_COST_ATTRIBUTION_UI_SETTING: is_ptu_cost_attribution_enabled(),
-        },
-        field_schema=settings["field_schema"],
+        values=values,
+        field_schema=resolved_settings.field_schema,
+        source=source,
     )
 
 
diff --git a/tests/test_litellm/proxy/management_endpoints/test_router_settings_endpoints.py b/tests/test_litellm/proxy/management_endpoints/test_router_settings_endpoints.py
index 308f4d88f02..3fcda310435 100644
--- a/tests/test_litellm/proxy/management_endpoints/test_router_settings_endpoints.py
+++ b/tests/test_litellm/proxy/management_endpoints/test_router_settings_endpoints.py
@@ -4,6 +4,8 @@ Tests for router settings management endpoints.
 Tests the GET endpoints for router settings and router fields.
 """
 
+from collections.abc import Mapping
+from typing import Any, Final
 from unittest.mock import AsyncMock, MagicMock, patch
 
 import pytest
@@ -15,12 +17,23 @@ from litellm.proxy._types import LitellmUserRoles, UserAPIKeyAuth
 from litellm.proxy.management_endpoints.router_settings_endpoints import (
     get_router_settings,
 )
+from litellm.proxy.config_resolvers import SettingsStore
 from litellm.proxy.proxy_server import app
 from litellm.router import Router
 
 client = TestClient(app)
 
 
+class _StubProxyConfig:
+    def __init__(self, router_settings: SettingsStore, config_router_settings: Mapping[str, Any]) -> None:
+        self.router_settings: Final = router_settings
+        self._config_router_settings: Final = dict(config_router_settings)
+
+    async def get_config(self, config_file_path: str | None = None) -> dict[str, Any]:
+        del config_file_path
+        return {"router_settings": dict(self._config_router_settings)}
+
+
 class TestRouterSettingsEndpoints:
     """Test suite for router settings endpoints"""
 
@@ -75,6 +88,31 @@ class TestRouterSettingsEndpoints:
         assert isinstance(routing_strategy_field["options"], list)
         assert len(routing_strategy_field["options"]) > 0
 
+    @pytest.mark.asyncio
+    async def test_get_router_settings_reports_sources(
+        self, monkeypatch: pytest.MonkeyPatch
+    ) -> None:
+        store = SettingsStore("router_settings")
+        store.load_yaml({"routing_strategy": "simple-shuffle"})
+        store.apply_db_row("router_settings", {"num_retries": 3})
+        monkeypatch.setattr(
+            proxy_server,
+            "proxy_config",
+            _StubProxyConfig(
+                store,
+                {"routing_strategy": "simple-shuffle", "num_retries": 3},
+            ),
+        )
+        monkeypatch.setattr(proxy_server, "llm_router", None)
+
+        admin_user = UserAPIKeyAuth(
+            user_role=LitellmUserRoles.PROXY_ADMIN, api_key="sk-x"
+        )
+        response = await get_router_settings(user_api_key_dict=admin_user)
+
+        assert response.source["routing_strategy"] == "config"
+        assert response.source["num_retries"] == "db"
+
     @pytest.mark.asyncio
     async def test_get_router_settings_includes_routing_groups_from_live_router(
         self, monkeypatch
@@ -102,12 +140,10 @@ class TestRouterSettingsEndpoints:
         )
 
         monkeypatch.setattr(proxy_server, "llm_router", llm_router)
-
-        async def fake_get_config(self, config_file_path=None):
-            return {}
-
         monkeypatch.setattr(
-            proxy_server.ProxyConfig, "get_config", fake_get_config, raising=True
+            proxy_server,
+            "proxy_config",
+            _StubProxyConfig(SettingsStore("router_settings"), {}),
         )
 
         admin_user = UserAPIKeyAuth(
@@ -116,6 +152,8 @@ class TestRouterSettingsEndpoints:
         response = await get_router_settings(user_api_key_dict=admin_user)
 
         assert response.current_values.get("routing_groups") == groups
+        assert response.current_values["timeout"] is not None
+        assert response.source["timeout"] == "default"
 
         rg_field = next(f for f in response.fields if f.field_name == "routing_groups")
         assert rg_field.field_value == groups
diff --git a/tests/test_litellm/proxy/proxy_server/test_routes_model_metrics.py b/tests/test_litellm/proxy/proxy_server/test_routes_model_metrics.py
index 246e2cbba54..b5536b7618c 100644
--- a/tests/test_litellm/proxy/proxy_server/test_routes_model_metrics.py
+++ b/tests/test_litellm/proxy/proxy_server/test_routes_model_metrics.py
@@ -11,13 +11,18 @@ Pins (PR2):
 
 from __future__ import annotations
 
+from collections.abc import Callable, Mapping
+from contextlib import AbstractContextManager
 from unittest.mock import AsyncMock, MagicMock
 
 import pytest
+from fastapi.testclient import TestClient
 
 import litellm
 from litellm.proxy import proxy_server
 from litellm.proxy._types import LitellmUserRoles
+from litellm.proxy.config_resolvers.settings_rules import JsonValue
+from litellm.proxy.config_resolvers.settings_store import SettingsStore
 
 from .conftest import normalize  # type: ignore[import-not-found]
 
@@ -179,6 +184,177 @@ def test_model_settings_method_not_allowed(client, auth_as):
 # ---------------------------------------------------------------------------
 
 
+def _alerting_client(
+    monkeypatch: pytest.MonkeyPatch,
+    *,
+    yaml_values: Mapping[str, JsonValue],
+    db_row: Mapping[str, JsonValue],
+    live_args: Mapping[str, JsonValue],
+) -> "SettingsStore":
+    pc = MagicMock()
+    row = MagicMock()
+    row.param_value = db_row
+    pc.db.litellm_config.find_first = AsyncMock(return_value=row)
+    monkeypatch.setattr(proxy_server, "prisma_client", pc)
+
+    logging_obj = MagicMock()
+    args_model = MagicMock()
+    args_model.model_dump = MagicMock(return_value=live_args)
+    logging_obj.slack_alerting_instance.alerting_args = args_model
+    monkeypatch.setattr(proxy_server, "proxy_logging_obj", logging_obj)
+
+    store = SettingsStore("general_settings")
+    store.load_yaml(yaml_values)
+    store.apply_db_row("general_settings", db_row)
+    monkeypatch.setattr(proxy_server.proxy_config, "settings", store)
+    monkeypatch.setattr(proxy_server, "general_settings", store)
+    return store
+
+
+def test_alerting_settings_reports_sources(
+    client: TestClient,
+    auth_as: Callable[..., AbstractContextManager[None]],
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    _alerting_client(
+        monkeypatch,
+        yaml_values={
+            "alerting": ["slack"],
+            "alerting_args": {"daily_report_frequency": 3, "report_check_interval": 300},
+        },
+        db_row={"alerting_args": {"daily_report_frequency": 7, "outage_alert_ttl": 4242}},
+        live_args={"daily_report_frequency": 3},
+    )
+
+    with auth_as(LitellmUserRoles.PROXY_ADMIN):
+        response = client.get("/alerting/settings")
+
+    assert response.status_code == 200
+    by_name = {entry["field_name"]: entry for entry in response.json()}
+
+    assert by_name["slack_alerting"]["source"] == "config"
+    assert by_name["daily_report_frequency"]["source"] == "config"
+    assert by_name["report_check_interval"]["source"] == "config"
+    assert by_name["outage_alert_ttl"]["source"] == "default"
+    assert by_name["budget_alert_ttl"]["source"] == "default"
+
+
+def test_alerting_settings_reports_db_source_when_the_file_omits_alerting_args(
+    client: TestClient,
+    auth_as: Callable[..., AbstractContextManager[None]],
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    store = _alerting_client(
+        monkeypatch,
+        yaml_values={"alerting": ["slack"]},
+        db_row={
+            "alerting_args": {
+                "outage_alert_ttl": 4242,
+                "region_outage_alert_ttl": [],
+                "report_check_interval": None,
+            }
+        },
+        live_args={"outage_alert_ttl": 4242},
+    )
+
+    with auth_as(LitellmUserRoles.PROXY_ADMIN):
+        response = client.get("/alerting/settings")
+
+    assert response.status_code == 200
+    by_name = {entry["field_name"]: entry for entry in response.json()}
+
+    assert store.source("alerting_args") == "db"
+    assert by_name["outage_alert_ttl"]["source"] == "db"
+    assert by_name["region_outage_alert_ttl"]["source"] == "db"
+    assert by_name["report_check_interval"]["source"] == "db"
+    assert by_name["budget_alert_ttl"]["source"] == "default"
+
+
+def test_alerting_settings_reports_config_source_when_db_disagrees(
+    client: TestClient,
+    auth_as: Callable[..., AbstractContextManager[None]],
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    from litellm.proxy.config_resolvers import SettingsStore
+
+    db_alerting_args = {"daily_report_frequency": 7}
+
+    pc = MagicMock()
+    row = MagicMock()
+    row.param_value = {"alerting_args": db_alerting_args}
+    pc.db.litellm_config.find_first = AsyncMock(return_value=row)
+    monkeypatch.setattr(proxy_server, "prisma_client", pc)
+
+    logging_obj = MagicMock()
+    args_model = MagicMock()
+    args_model.model_dump = MagicMock(return_value={"daily_report_frequency": 3})
+    logging_obj.slack_alerting_instance.alerting_args = args_model
+    monkeypatch.setattr(proxy_server, "proxy_logging_obj", logging_obj)
+
+    store = SettingsStore("general_settings")
+    store.load_yaml({"alerting_args": {"daily_report_frequency": 3}})
+    store.apply_db_row("general_settings", {"alerting_args": db_alerting_args})
+    monkeypatch.setattr(proxy_server.proxy_config, "settings", store)
+    monkeypatch.setattr(proxy_server, "general_settings", store)
+
+    with auth_as(LitellmUserRoles.PROXY_ADMIN):
+        response = client.get("/alerting/settings")
+
+    assert response.status_code == 200
+    by_name = {entry["field_name"]: entry for entry in response.json()}
+    assert store.source("alerting_args") == "config"
+    assert by_name["daily_report_frequency"]["field_value"] == 3
+    assert by_name["daily_report_frequency"]["source"] == "config"
+
+
+@pytest.mark.parametrize("db_alerting_args", [None, []])
+def test_alerting_settings_handles_empty_db_args(
+    client: TestClient,
+    auth_as: Callable[..., AbstractContextManager[None]],
+    monkeypatch: pytest.MonkeyPatch,
+    db_alerting_args: JsonValue,
+) -> None:
+    from litellm.proxy.config_resolvers import SettingsStore
+
+    pc = MagicMock()
+    row = MagicMock()
+    row.param_value = {"alerting_args": db_alerting_args}
+    pc.db.litellm_config.find_first = AsyncMock(return_value=row)
+    monkeypatch.setattr(proxy_server, "prisma_client", pc)
+
+    logging_obj = MagicMock()
+    args_model = MagicMock()
+    args_model.model_dump = MagicMock(return_value={})
+    logging_obj.slack_alerting_instance.alerting_args = args_model
+    monkeypatch.setattr(proxy_server, "proxy_logging_obj", logging_obj)
+
+    store = SettingsStore("general_settings")
+    store.load_yaml({"alerting_args": {"report_check_interval": 300}})
+    monkeypatch.setattr(proxy_server.proxy_config, "settings", store)
+    monkeypatch.setattr(proxy_server, "general_settings", store)
+
+    with auth_as(LitellmUserRoles.PROXY_ADMIN):
+        response = client.get("/alerting/settings")
+
+    assert response.status_code == 200
+    by_name = {entry["field_name"]: entry for entry in response.json()}
+    assert by_name["report_check_interval"]["source"] == "config"
+    assert by_name["budget_alert_ttl"]["source"] == "default"
+
+
+@pytest.mark.parametrize(
+    ("field_default", "expected"),
+    [(43200, "default"), (None, "unset")],
+)
+def test_nested_setting_source_without_a_config_or_db_value(field_default: JsonValue, expected: str) -> None:
+    store = SettingsStore("general_settings")
+    store.load_yaml({})
+
+    assert (
+        proxy_server._nested_setting_source(store, {}, "alerting_args", "budget_alert_ttl", field_default) == expected
+    )
+
+
 def test_alerting_settings_no_db_error(client, auth_as, no_prisma):
     """Pins ``GET /alerting/settings`` (error: db not connected)."""
     with auth_as(LitellmUserRoles.PROXY_ADMIN):
diff --git a/tests/test_litellm/proxy/ui_crud_endpoints/test_proxy_setting_endpoints.py b/tests/test_litellm/proxy/ui_crud_endpoints/test_proxy_setting_endpoints.py
index 0f57af7f82c..eecee2fd0f1 100644
--- a/tests/test_litellm/proxy/ui_crud_endpoints/test_proxy_setting_endpoints.py
+++ b/tests/test_litellm/proxy/ui_crud_endpoints/test_proxy_setting_endpoints.py
@@ -1342,6 +1342,48 @@ class TestProxySettingEndpoints:
             where={"id": "ui_settings"}
         )
 
+    def test_get_ui_settings_reports_sources(self, monkeypatch: pytest.MonkeyPatch) -> None:
+        from unittest.mock import AsyncMock, MagicMock
+
+        from litellm.proxy import proxy_server
+        from litellm.proxy.config_resolvers import SettingsStore
+
+        mock_prisma = MagicMock()
+        mock_db_record = MagicMock()
+        mock_db_record.ui_settings = {
+            "disable_model_add_for_internal_users": True,
+            "require_auth_for_public_ai_hub": True,
+        }
+        mock_prisma.db.litellm_uisettings.find_unique = AsyncMock(
+            return_value=mock_db_record
+        )
+        monkeypatch.setattr(proxy_server, "prisma_client", mock_prisma)
+
+        store = SettingsStore("general_settings")
+        store.load_yaml(
+            {
+                "disable_model_add_for_internal_users": False,
+                "forward_client_headers_to_llm_api": True,
+            }
+        )
+        store.apply_db_row(
+            "ui_settings",
+            {"disable_model_add_for_internal_users": True},
+        )
+        monkeypatch.setattr(proxy_server.proxy_config, "settings", store)
+        monkeypatch.setattr(proxy_server, "general_settings", store)
+
+        response = client.get("/get/ui_settings")
+
+        assert response.status_code == 200
+        data = response.json()
+        assert data["values"]["disable_model_add_for_internal_users"] is False
+        assert data["values"]["forward_client_headers_to_llm_api"] is True
+        assert data["values"]["require_auth_for_public_ai_hub"] is True
+        assert data["source"]["disable_model_add_for_internal_users"] == "config"
+        assert data["source"]["forward_client_headers_to_llm_api"] == "config"
+        assert data["source"]["require_auth_for_public_ai_hub"] == "db"
+
     def test_get_ui_settings_schema_description_preserved_with_extensions(
         self, mock_auth, monkeypatch
     ):
@@ -3477,6 +3519,7 @@ class TestPtuCostAttributionUISetting:
 
         assert response.status_code == 200
         assert response.json()["values"]["enable_ptu_cost_attribution"] is False
+        assert response.json()["source"]["enable_ptu_cost_attribution"] == "default"
 
     def test_reported_true_once_the_env_var_is_set(self, mock_auth, monkeypatch):
         from litellm.proxy.spend_tracking.ptu_feature_flag import PTU_COST_ATTRIBUTION_ENV_VAR
@@ -3488,6 +3531,47 @@ class TestPtuCostAttributionUISetting:
 
         assert response.status_code == 200
         assert response.json()["values"]["enable_ptu_cost_attribution"] is True
+        assert response.json()["source"]["enable_ptu_cost_attribution"] == "config"
+
+    def test_reported_config_when_secret_manager_enables_the_flag(
+        self, mock_auth: None, monkeypatch: pytest.MonkeyPatch
+    ) -> None:
+        from litellm.proxy.spend_tracking.ptu_feature_flag import PTU_COST_ATTRIBUTION_ENV_VAR
+
+        monkeypatch.delenv(PTU_COST_ATTRIBUTION_ENV_VAR, raising=False)
+        monkeypatch.setattr(
+            "litellm.proxy.ui_crud_endpoints.proxy_setting_endpoints.is_ptu_cost_attribution_enabled",
+            lambda: True,
+        )
+        self._mock_prisma(monkeypatch)
+
+        response = client.get("/get/ui_settings")
+
+        assert response.status_code == 200
+        assert response.json()["values"]["enable_ptu_cost_attribution"] is True
+        assert response.json()["source"]["enable_ptu_cost_attribution"] == "config"
+
+    def test_reported_config_when_secret_manager_disables_the_flag(
+        self, mock_auth: None, monkeypatch: pytest.MonkeyPatch
+    ) -> None:
+        from litellm.proxy.spend_tracking.ptu_feature_flag import PTU_COST_ATTRIBUTION_ENV_VAR
+
+        monkeypatch.delenv(PTU_COST_ATTRIBUTION_ENV_VAR, raising=False)
+        monkeypatch.setattr(
+            "litellm.proxy.ui_crud_endpoints.proxy_setting_endpoints.is_ptu_cost_attribution_enabled",
+            lambda: False,
+        )
+        monkeypatch.setattr(
+            "litellm.proxy.ui_crud_endpoints.proxy_setting_endpoints.get_secret",
+            lambda *_args: False,
+        )
+        self._mock_prisma(monkeypatch)
+
+        response = client.get("/get/ui_settings")
+
+        assert response.status_code == 200
+        assert response.json()["values"]["enable_ptu_cost_attribution"] is False
+        assert response.json()["source"]["enable_ptu_cost_attribution"] == "config"
 
     def test_a_persisted_true_cannot_forge_the_derived_value(self, mock_auth, monkeypatch):
         """A row written before the allowlist existed must not be able to turn the feature on."""
diff --git a/ui/litellm-dashboard/src/lib/http/schema.d.ts b/ui/litellm-dashboard/src/lib/http/schema.d.ts
index 38a85e31003..500cf35542e 100644
--- a/ui/litellm-dashboard/src/lib/http/schema.d.ts
+++ b/ui/litellm-dashboard/src/lib/http/schema.d.ts
@@ -37245,6 +37245,13 @@ export interface components {
             routing_strategy_descriptions: {
                 [key: string]: string;
             };
+            /**
+             * Source
+             * @description Source of each current router setting
+             */
+            source: {
+                [key: string]: "config" | "db" | "env" | "default" | "unset";
+            };
         };
         /**
          * RoutingGroup
@@ -39708,6 +39715,10 @@ export interface components {
             field_schema: {
                 [key: string]: unknown;
             };
+            /** Source */
+            source: {
+                [key: string]: "config" | "db" | "env" | "default" | "unset";
+            };
             /** Values */
             values: {
                 [key: string]: unknown;