Credit cards are convenient, but carrying a balance can be one of the most expensive ways to borrow. Here’s how the interest and minimum payments really work.
How credit card interest works
Your card’s APR (annual percentage rate) is the yearly cost of borrowing. Most cards divide the APR by 365 to get a daily rate, then charge it on your average daily balance. Interest is added to your balance each month, so next month you pay interest on last month’s interest too. That’s compound interest working against you.
Rates are high. The Federal Reserve reports that the average APR on credit card accounts that are charged interest is around 21% to 22%. The average credit card balance is $6,659, according to Experian (March 2026).
The grace period: how to pay zero interest
Most cards give you a grace period: if you pay your full statement balance by the due date every month, you generally pay no interest on new purchases. Carry even part of a balance, and you can lose the grace period until you pay in full again.
How minimum payments work
Your minimum payment is usually a small percentage of your balance (often around 1% to 3%) plus that month’s interest and fees, or a small flat amount, whichever is higher. It’s designed to be affordable, which is exactly why paying only the minimum keeps you in debt for so long.
Hypothetical example: a $5,000 balance at 22% APR, with a minimum payment of 1% of the balance plus interest (at least $35):
| Minimum payments only | Fixed $200 a month | |
|---|---|---|
| First payment | About $142 | $200 |
| Time to pay off | About 16½ years | Under 3 years |
| Total interest | About $7,670 | About $1,750 |
Paying about $58 more each month at the start saves roughly $5,900 and more than 13 years.
Your statement shows the real cost
Under the federal Credit CARD Act, your monthly statement must include a minimum payment warning showing how long payoff would take with minimum payments only, and how much you’d pay in total. It’s worth a look.
How to take control
- Pay the full statement balance each month if you can.
- If you carry balances, pay a fixed amount well above the minimum, and use the avalanche or snowball method to focus extra payments.
- Ask your card issuer for a lower rate. It costs nothing to ask.
- Build an emergency fund so surprises don’t land on the card.
Who should read this
Anyone who carries a credit card balance from month to month, or who is thinking about it.
See how your credit card debt compares with the national average. Get your Wealth Report Card.
Sources: Federal Reserve G.19 Consumer Credit release; Experian (March 2026); Credit CARD Act of 2009. Example is hypothetical, calculated by Workable Financial Solutions for illustration only; actual terms vary by card issuer. We are not a debt settlement or credit counseling company.