diff --git a/src/utils/helpers.py b/src/utils/helpers.py
index 1111aaa..2222bbb 100644
--- a/src/utils/helpers.py
+++ b/src/utils/helpers.py
@@ -5,6 +5,12 @@ import re
 def sanitize_input(text):
     """Remove potentially dangerous characters."""
     return re.sub(r'[<>&"\']', '', text)
+
+
+def format_currency(amount, currency="USD"):
+    """Format a number as currency string."""
+    symbols = {"USD": "$", "EUR": "€", "GBP": "£"}
+    return f"{symbols.get(currency, '$')}{amount:,.2f}"
