diff --git a/litellm/litellm_core_utils/litellm_logging.py b/litellm/litellm_core_utils/litellm_logging.py
index 99a1ba60f25..f90515ac81f 100644
--- a/litellm/litellm_core_utils/litellm_logging.py
+++ b/litellm/litellm_core_utils/litellm_logging.py
@@ -2749,9 +2749,10 @@ class Logging(LiteLLMLoggingBaseClass):
         litellm_params: Final[object] = self.model_call_details.get("litellm_params")
         if entry is None or not is_str_keyed_dict(litellm_params):
             return
-        metadata: Final[object] = litellm_params.setdefault("metadata", {})
-        if is_str_keyed_dict(metadata):
-            with_guardrail_entry(metadata, entry)
+        metadata: Final[object] = litellm_params.get("metadata")
+        bucket: Final = metadata if is_str_keyed_dict(metadata) else {}
+        litellm_params["metadata"] = bucket
+        with_guardrail_entry(bucket, entry)
 
     def _merge_hidden_params_from_response_into_metadata(self, logging_result: object) -> None:
         """
diff --git a/tests/unit/litellm_core_utils/test_litellm_logging.py b/tests/unit/litellm_core_utils/test_litellm_logging.py
index 561ac9b2b33..f44bb1a9050 100644
--- a/tests/unit/litellm_core_utils/test_litellm_logging.py
+++ b/tests/unit/litellm_core_utils/test_litellm_logging.py
@@ -13642,3 +13642,27 @@ def test_native_messages_body_carries_the_reported_list_cost_into_the_priced_res
     assert isinstance(priced, ModelResponse)
     headers = priced._hidden_params.get("additional_headers") or {}
     assert headers.get("llm_provider-x-litellm-response-cost") == expected_header
+
+
+def test_record_native_bedrock_guardrail_bills_when_the_metadata_is_none() -> None:
+    import datetime
+
+    from litellm.litellm_core_utils.litellm_logging import Logging
+
+    logging_obj = Logging(
+        model="bedrock/anthropic.claude-sonnet-4-5-20250929-v1:0",
+        messages=[{"role": "user", "content": "hello"}],
+        stream=False,
+        call_type="completion",
+        start_time=datetime.datetime.now(),
+        litellm_call_id="call-none-metadata",
+        function_id="fn",
+    )
+    logging_obj.model_call_details["litellm_params"] = {"metadata": None}
+    trace = {"guardrail": {"inputAssessment": {"gid": {"invocationMetrics": {"usage": {"contentPolicyUnits": 2}}}}}}
+
+    logging_obj.record_native_bedrock_guardrail({"trace": trace})
+
+    (entry,) = logging_obj.model_call_details["litellm_params"]["metadata"]["standard_logging_guardrail_information"]
+    assert entry["guardrail_usage"] == {"contentPolicyUnits": 2}
+    assert entry["guardrail_cost"] > 0