How This Credit Card Payoff Calculator Works

Credit card debt is an amortizing loan with no fixed term: each month, interest is added to whatever balance is left, then your payment comes off. The calculator steps through that month by month — the same way your statement does — until the balance reaches zero. The final payment is smaller, so you never overpay past zero.

The one guardrail that matters: your payment must be larger than one month of interest (balance × APR ÷ 12). If it is not, the balance never shrinks and the card is never paid off. That is exactly what happens with many minimum payments — they are often set at about 1–3% of the balance plus that month's interest, so the required payment shrinks as the balance falls and payoff can stretch past a decade.

Worked example: a $5,000 balance at 20% APR with a fixed $200 monthly payment and no new charges. Month 1 interest is $5,000 × 20% ÷ 12 = $83.33, so $116.67 goes to principal and the balance falls to $4,883.33. Stepping through the same way, the card clears in 33 months with about $1,522 in total interest — $6,522 paid in total. Raising the payment to $300 a month cuts that to 20 months and about $907 in interest.

Practical tips

Fix the payment; do not ride the minimum down.

Keeping your payment fixed as the balance falls is the single biggest accelerator — the same dollars clear principal faster every month.

Small increases buy big time.

On a $5,000 balance at 20%, going from $200 to $300 a month saves roughly 13 months and about $615 in interest. The earlier the increase, the bigger the saving.

Stop new charges while you pay off.

Every new purchase re-opens the clock. A payoff plan only works if the balance is not growing behind it.

Your statement already shows a 36-month figure.

Card issuers must print the payment needed to clear the balance in 36 months. Compare it with your planned payment here.

Balance transfers are a tool, not a plan.

A 0% intro APR pauses interest — but only if you clear the balance before the promo ends. Run the transferred amount here at 0% APR first.