diff --git a/litellm/proxy/litellm_pre_call_utils.py b/litellm/proxy/litellm_pre_call_utils.py
index 15d1876e5a2..3bd92d21766 100644
--- a/litellm/proxy/litellm_pre_call_utils.py
+++ b/litellm/proxy/litellm_pre_call_utils.py
@@ -1048,16 +1048,10 @@ class LiteLLMProxyRequestSetup:
         if "disable_global_guardrails" in key_metadata and isinstance(key_metadata["disable_global_guardrails"], bool):
             data[_metadata_variable_name]["disable_global_guardrails"] = key_metadata["disable_global_guardrails"]
         if "spend_logs_metadata" in key_metadata and isinstance(key_metadata["spend_logs_metadata"], dict):
-            if "spend_logs_metadata" in data[_metadata_variable_name] and isinstance(
-                data[_metadata_variable_name]["spend_logs_metadata"], dict
-            ):
-                for key, value in key_metadata["spend_logs_metadata"].items():
-                    if (
-                        key not in data[_metadata_variable_name]["spend_logs_metadata"]
-                    ):  # don't override k-v pair sent by request (user request)
-                        data[_metadata_variable_name]["spend_logs_metadata"][key] = value
-            else:
-                data[_metadata_variable_name]["spend_logs_metadata"] = key_metadata["spend_logs_metadata"]
+            data[_metadata_variable_name]["spend_logs_metadata"] = LiteLLMProxyRequestSetup._merge_spend_logs_metadata(
+                existing=data[_metadata_variable_name].get("spend_logs_metadata"),
+                to_add=key_metadata["spend_logs_metadata"],
+            )
 
         ## KEY-LEVEL DISABLE FALLBACKS
         if "disable_fallbacks" in key_metadata and isinstance(key_metadata["disable_fallbacks"], bool):
@@ -1095,6 +1089,14 @@ class LiteLLMProxyRequestSetup:
 
         return final_tags
 
+    @staticmethod
+    def _merge_spend_logs_metadata(existing: dict | None, to_add: dict | None) -> dict | None:
+        if not isinstance(to_add, dict):
+            return existing
+        if not isinstance(existing, dict):
+            return dict(to_add)
+        return {**to_add, **existing}
+
     @staticmethod
     def add_team_based_callbacks_from_config(
         team_id: str,
@@ -1555,16 +1557,19 @@ async def add_litellm_data_to_request(
     ):
         data[_metadata_variable_name]["opted_out_global_guardrails"] = team_metadata["opted_out_global_guardrails"]
     if "spend_logs_metadata" in team_metadata and isinstance(team_metadata["spend_logs_metadata"], dict):
-        if "spend_logs_metadata" in data[_metadata_variable_name] and isinstance(
-            data[_metadata_variable_name]["spend_logs_metadata"], dict
-        ):
-            for key, value in team_metadata["spend_logs_metadata"].items():
-                if (
-                    key not in data[_metadata_variable_name]["spend_logs_metadata"]
-                ):  # don't override k-v pair sent by request (user request)
-                    data[_metadata_variable_name]["spend_logs_metadata"][key] = value
-        else:
-            data[_metadata_variable_name]["spend_logs_metadata"] = team_metadata["spend_logs_metadata"]
+        data[_metadata_variable_name]["spend_logs_metadata"] = LiteLLMProxyRequestSetup._merge_spend_logs_metadata(
+            existing=data[_metadata_variable_name].get("spend_logs_metadata"),
+            to_add=team_metadata["spend_logs_metadata"],
+        )
+
+    organization_metadata = user_api_key_dict.organization_metadata or {}
+    if "spend_logs_metadata" in organization_metadata and isinstance(
+        organization_metadata["spend_logs_metadata"], dict
+    ):
+        data[_metadata_variable_name]["spend_logs_metadata"] = LiteLLMProxyRequestSetup._merge_spend_logs_metadata(
+            existing=data[_metadata_variable_name].get("spend_logs_metadata"),
+            to_add=organization_metadata["spend_logs_metadata"],
+        )
 
     ## PROJECT-LEVEL TAGS
     project_metadata = user_api_key_dict.project_metadata or {}
diff --git a/tests/test_litellm/proxy/test_litellm_pre_call_utils.py b/tests/test_litellm/proxy/test_litellm_pre_call_utils.py
index d2b8b7ec23d..27bfb620dec 100644
--- a/tests/test_litellm/proxy/test_litellm_pre_call_utils.py
+++ b/tests/test_litellm/proxy/test_litellm_pre_call_utils.py
@@ -5118,3 +5118,98 @@ async def test_add_litellm_data_to_request_unions_metadata_tags_with_header_tags
     tags = updated["litellm_metadata"]["tags"]
     assert "header-tag" in tags
     assert "body-tag" in tags
+
+
+def _spend_logs_request_mock():
+    request_mock = MagicMock(spec=Request)
+    request_mock.url = MagicMock()
+    request_mock.url.path = "/v1/chat/completions"
+    request_mock.url.__str__.return_value = "http://localhost/v1/chat/completions"
+    request_mock.method = "POST"
+    request_mock.query_params = {}
+    request_mock.headers = {"Content-Type": "application/json"}
+    request_mock.client = MagicMock()
+    request_mock.client.host = "127.0.0.1"
+    return request_mock
+
+
+@pytest.mark.asyncio
+async def test_organization_spend_logs_metadata_is_merged():
+    user_api_key_dict = UserAPIKeyAuth(
+        api_key="hashed-key",
+        metadata={},
+        team_metadata={},
+        organization_metadata={"spend_logs_metadata": {"cost_center": "org-123"}},
+    )
+
+    updated = await add_litellm_data_to_request(
+        data={"model": "gpt-3.5-turbo"},
+        request=_spend_logs_request_mock(),
+        user_api_key_dict=user_api_key_dict,
+        proxy_config=MagicMock(),
+        general_settings={},
+        version="test-version",
+    )
+
+    assert updated["metadata"]["spend_logs_metadata"] == {"cost_center": "org-123"}
+
+
+@pytest.mark.asyncio
+async def test_spend_logs_metadata_precedence_request_key_team_org():
+    user_api_key_dict = UserAPIKeyAuth(
+        api_key="hashed-key",
+        metadata={"spend_logs_metadata": {"level": "key", "from_key": "k"}},
+        team_metadata={"spend_logs_metadata": {"level": "team", "from_team": "t"}},
+        organization_metadata={"spend_logs_metadata": {"level": "org", "from_org": "o"}},
+    )
+
+    updated = await add_litellm_data_to_request(
+        data={
+            "model": "gpt-3.5-turbo",
+            "metadata": {"spend_logs_metadata": {"level": "request", "from_request": "r"}},
+        },
+        request=_spend_logs_request_mock(),
+        user_api_key_dict=user_api_key_dict,
+        proxy_config=MagicMock(),
+        general_settings={},
+        version="test-version",
+    )
+
+    merged = updated["metadata"]["spend_logs_metadata"]
+    assert merged["level"] == "request"
+    assert merged["from_request"] == "r"
+    assert merged["from_key"] == "k"
+    assert merged["from_team"] == "t"
+    assert merged["from_org"] == "o"
+
+
+@pytest.mark.asyncio
+async def test_key_spend_logs_metadata_not_mutated_by_team_and_org():
+    key_metadata = {"spend_logs_metadata": {"from_key": "k"}}
+    team_metadata = {"spend_logs_metadata": {"from_team": "t"}}
+    organization_metadata = {"spend_logs_metadata": {"from_org": "o"}}
+
+    user_api_key_dict = UserAPIKeyAuth(
+        api_key="hashed-key",
+        metadata=key_metadata,
+        team_metadata=team_metadata,
+        organization_metadata=organization_metadata,
+    )
+
+    updated = await add_litellm_data_to_request(
+        data={"model": "gpt-3.5-turbo"},
+        request=_spend_logs_request_mock(),
+        user_api_key_dict=user_api_key_dict,
+        proxy_config=MagicMock(),
+        general_settings={},
+        version="test-version",
+    )
+
+    assert updated["metadata"]["spend_logs_metadata"] == {
+        "from_key": "k",
+        "from_team": "t",
+        "from_org": "o",
+    }
+    assert key_metadata["spend_logs_metadata"] == {"from_key": "k"}
+    assert team_metadata["spend_logs_metadata"] == {"from_team": "t"}
+    assert organization_metadata["spend_logs_metadata"] == {"from_org": "o"}