Interest and balance calculator
Compounding is what makes a credit-card balance grow when you carry it from month to month. Plug in a balance, a regular monthly amount, an interest rate or APR, and a time horizon to see how a balance builds - and why paying it down faster costs you far less.
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Results appear after clicking Calculate
Adjust your numbers and click Calculate to see results
Balance after
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Total paid in
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Interest
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How the balance compounds over time
Balance
Amount paid in
Educational estimate of how interest compounds, not financial advice. The same compounding shown here is what makes a carried credit-card balance grow when interest is charged - confirm any rate or APR with the issuer.