diff --git a/executorlib/cache/backend.py b/executorlib/cache/backend.py
index fb78fae7..0e0bf779 100644
--- a/executorlib/cache/backend.py
+++ b/executorlib/cache/backend.py
@@ -46,7 +46,7 @@ def backend_write_file(file_name: str, output: Any, runtime: float) -> None:
     os.rename(file_name, file_name_out + ".h5ready")
     dump(
         file_name=file_name_out + ".h5ready",
-        data_dict={"output": output, "time": runtime},
+        data_dict={"output": output, "runtime": runtime},
     )
     os.rename(file_name_out + ".h5ready", file_name_out + ".h5out")
 
diff --git a/executorlib/standalone/hdf.py b/executorlib/standalone/hdf.py
index 06048f6b..c0dd0609 100644
--- a/executorlib/standalone/hdf.py
+++ b/executorlib/standalone/hdf.py
@@ -18,6 +18,7 @@ def dump(file_name: str, data_dict: dict) -> None:
         "args": "input_args",
         "kwargs": "input_kwargs",
         "output": "output",
+        "runtime": "runtime",
         "queue_id": "queue_id",
     }
     with h5py.File(file_name, "a") as fname:
@@ -73,6 +74,23 @@ def get_output(file_name: str) -> Tuple[bool, object]:
             return False, None
 
 
+def get_runtime(file_name: str) -> float:
+    """
+    Get run time from HDF5 file
+
+    Args:
+        file_name (str): file name of the HDF5 file as absolute path
+
+    Returns:
+        float: run time from the execution of the python function
+    """
+    with h5py.File(file_name, "r") as hdf:
+        if "runtime" in hdf:
+            return cloudpickle.loads(np.void(hdf["/runtime"]))
+        else:
+            return 0.0
+
+
 def get_queue_id(file_name: str) -> Optional[int]:
     with h5py.File(file_name, "r") as hdf:
         if "queue_id" in hdf:
diff --git a/tests/test_cache_shared.py b/tests/test_cache_shared.py
index 544eb73f..5fef76af 100644
--- a/tests/test_cache_shared.py
+++ b/tests/test_cache_shared.py
@@ -7,7 +7,7 @@
 try:
     from executorlib.cache.backend import backend_execute_task_in_file
     from executorlib.cache.shared import _check_task_output, FutureItem
-    from executorlib.standalone.hdf import dump
+    from executorlib.standalone.hdf import dump, get_runtime
     from executorlib.standalone.serialize import serialize_funct_h5
 
     skip_h5io_test = False
@@ -40,6 +40,7 @@ def test_execute_function_mixed(self):
         )
         self.assertTrue(future_obj.done())
         self.assertEqual(future_obj.result(), 3)
+        self.assertTrue(get_runtime(file_name=os.path.join(cache_directory, task_key + ".h5out")) > 0.0)
         future_file_obj = FutureItem(
             file_name=os.path.join(cache_directory, task_key + ".h5out")
         )
@@ -63,6 +64,7 @@ def test_execute_function_args(self):
         )
         self.assertTrue(future_obj.done())
         self.assertEqual(future_obj.result(), 3)
+        self.assertTrue(get_runtime(file_name=os.path.join(cache_directory, task_key + ".h5out")) > 0.0)
         future_file_obj = FutureItem(
             file_name=os.path.join(cache_directory, task_key + ".h5out")
         )
@@ -86,6 +88,7 @@ def test_execute_function_kwargs(self):
         )
         self.assertTrue(future_obj.done())
         self.assertEqual(future_obj.result(), 3)
+        self.assertTrue(get_runtime(file_name=os.path.join(cache_directory, task_key + ".h5out")) > 0.0)
         future_file_obj = FutureItem(
             file_name=os.path.join(cache_directory, task_key + ".h5out")
         )