diff --git a/src/climatebenchpress/compressor/scripts/compute_metrics.py b/src/climatebenchpress/compressor/scripts/compute_metrics.py
index 208255c..771b158 100644
--- a/src/climatebenchpress/compressor/scripts/compute_metrics.py
+++ b/src/climatebenchpress/compressor/scripts/compute_metrics.py
@@ -33,6 +33,7 @@ def compute_metrics(
     include_dataset: None | Iterable[str] = None,
     exclude_compressor: Iterable[str] = tuple(),
     include_compressor: None | Iterable[str] = None,
+    overwrite: bool = False,
 ):
     """Compute evaluation metrics for compressors.
 
@@ -54,6 +55,9 @@ def compute_metrics(
     include_compressor : None | Iterable[str]
         Compressors to include in evaluation. If `None`, all compressors are included.
         If specified, only compressors in `include_compressor` will be evaluated.
+    overwrite : bool
+        If `True`, overwrite existing `metrics.csv` and `tests.csv` files. Otherwise,
+        existing files are read and returned without recomputation.
     """
     exclude_compressor = add_compressor_suffixes(exclude_compressor)
     include_compressor = add_compressor_suffixes(include_compressor)
@@ -106,8 +110,16 @@ def compute_metrics(
                 )
                 compressor_metrics.mkdir(parents=True, exist_ok=True)
 
-                compute_compressor_metrics(compressor_metrics, ds, ds_new)
-                compute_tests(compressor_metrics, variable2error_bound, ds, ds_new)
+                compute_compressor_metrics(
+                    compressor_metrics, ds, ds_new, overwrite=overwrite
+                )
+                compute_tests(
+                    compressor_metrics,
+                    variable2error_bound,
+                    ds,
+                    ds_new,
+                    overwrite=overwrite,
+                )
 
 
 def add_compressor_suffixes(compressors: None | Iterable[str]) -> list[str]:
@@ -171,10 +183,13 @@ def parse_error_bounds(error_bound_str: str) -> dict[str, tuple[str, float]]:
 
 
 def compute_compressor_metrics(
-    compressor_metrics: Path, ds: xr.Dataset, ds_new: xr.Dataset
+    compressor_metrics: Path,
+    ds: xr.Dataset,
+    ds_new: xr.Dataset,
+    overwrite: bool = False,
 ) -> pd.DataFrame:
     metrics_path = compressor_metrics / "metrics.csv"
-    if metrics_path.exists():
+    if metrics_path.exists() and not overwrite:
         return pd.read_csv(metrics_path)
 
     metric_list = []
@@ -206,9 +221,10 @@ def compute_tests(
     variable2bound: dict[str, tuple[str, float]],
     ds: xr.Dataset,
     ds_new: xr.Dataset,
+    overwrite: bool = False,
 ) -> pd.DataFrame:
     tests_path = compressor_metrics / "tests.csv"
-    if tests_path.exists():
+    if tests_path.exists() and not overwrite:
         return pd.read_csv(tests_path)
 
     test_list = []
@@ -336,6 +352,7 @@ def merge_metrics(
     parser.add_argument("--include-dataset", type=str, nargs="+", default=None)
     parser.add_argument("--exclude-compressor", type=str, nargs="+", default=[])
     parser.add_argument("--include-compressor", type=str, nargs="+", default=None)
+    parser.add_argument("--overwrite", action="store_true")
     args = parser.parse_args()
     compute_metrics(
         basepath=args.basepath,
@@ -344,4 +361,5 @@ def merge_metrics(
         include_dataset=args.include_dataset,
         exclude_compressor=args.exclude_compressor,
         include_compressor=args.include_compressor,
+        overwrite=args.overwrite,
     )