diff --git a/pandas/io/excel/_base.py b/pandas/io/excel/_base.py
index 6362e892f0012..35de5fb075e11 100644
--- a/pandas/io/excel/_base.py
+++ b/pandas/io/excel/_base.py
@@ -2,6 +2,7 @@
 
 import abc
 import datetime
+from decimal import Decimal
 from functools import partial
 from io import BytesIO
 import os
@@ -48,6 +49,7 @@
 
 from pandas.core.dtypes.common import (
     is_bool,
+    is_decimal,
     is_float,
     is_integer,
     is_list_like,
@@ -1368,6 +1370,8 @@ def _value_with_fmt(self, val) -> tuple[object, str | None]:
             val = int(val)
         elif is_float(val):
             val = float(val)
+        elif is_decimal(val):
+            val = Decimal(val)
         elif is_bool(val):
             val = bool(val)
         elif isinstance(val, datetime.datetime):