American banks collected $15 billion in fees last year that most customers didn't realize they were paying. Here are the sneakiest charges and how to dodge them.

1. Paper Statement Fee ($2-$5/month)

Switch to electronic statements. It takes 30 seconds and saves $24-$60/year.

2. Inactivity Fee ($5-$25/month)

Some banks charge if you don't use your account for 6-12 months. Set up a small recurring transfer to keep it active.

3. Foreign Transaction Fee (1-3%)

Charged on every purchase abroad or from foreign merchants online. Solution: Use a card with no foreign transaction fees (most travel cards).

4. Excessive Withdrawal Fee

More than 6 withdrawals from savings per month triggers a fee. Use checking for regular transactions.

5. Wire Transfer Fee ($15-$50)

Use Zelle (free, instant) or ACH transfers (free, 1-3 days) instead.