Calculator
Credit card interest cost calculator
Enter a balance and APR to see roughly what carrying it costs each month and each year. This is simple annualized interest — a clear illustration, not your exact statement.
Runs entirely in your browser — nothing you type is stored or sent anywhere. Illustrative math only, not a quote, guarantee, or advice.
What this assumes
- Simple annualized interest: the APR percentage of a balance held unchanged for a year.
- Real interest usually compounds daily and changes as your balance changes.
- Paying the statement balance in full each month avoids purchase interest entirely.
Educational information — not advice
This page provides general educational information about credit, debt, and consumer protections. It is not legal advice, financial advice, or credit repair services, and reading it does not create any professional relationship. Laws, procedures, deadlines, and dollar amounts vary by state and change over time.
For advice about your specific situation, consult a licensed attorney or qualified financial professional. See our full disclaimer.