How to Calculate Your Credit Card Minimum Payment
Your statement lists a minimum payment due, but issuers rarely explain how they got that number. It's not arbitrary - it comes from a formula written into your cardholder agreement, and understanding it explains why minimum-only payments can take decades to clear a balance.
The formula
Most US issuers calculate your minimum as whichever is larger: a flat dollar floor, or a percentage of your statement balance plus that month's accrued interest and any fees.
Worked example: a $4,000 balance at 24% APR, with a 3% minimum and a $25 floor. Interest for the month is $4,000 × (24% ÷ 12) = $80. The percentage-based minimum is $4,000 × 3% = $120, plus that $80 of interest already folded in by most issuers' actual formulas - in practice you'll see roughly $120 on the statement, comfortably above the $25 floor. As the balance falls to $3,000, the same math produces a minimum around $90 - smaller, even though the debt isn't close to gone.
Why the shrinking minimum is the trap
Because the percentage resets against a lower balance every month, the minimum payment decays right alongside your debt. Early on, almost the entire minimum is interest - very little touches principal - so the balance falls at a crawl. On a typical $5,000 balance at 20% APR, paying only the minimum can take over 20 years and cost more in interest than the original balance itself.
The fix: pay a fixed amount, not a shrinking percentage
The single most effective change is simple: pick a fixed dollar amount above the minimum and automate it, rather than letting the payment shrink with the balance. Because the payment no longer shrinks, an increasing share of it attacks principal every month - which is what actually compresses the payoff timeline. Our Credit Card Payoff Calculator shows exactly how much time and interest a fixed extra payment saves versus the minimum.
Frequently asked questions
What percentage is a typical credit card minimum payment?
Most US issuers use 1-3% of the statement balance, commonly landing around 2-3%, with a dollar floor - often $25-$35 - that applies to small balances. Your card's terms and conditions state the exact figures; they can differ by issuer and even by card product.
Why does the minimum payment keep shrinking?
Because it's calculated as a percentage of your current balance. Pay it down and the balance drops, so next month's percentage-based minimum drops with it. That shrinking payment is precisely why minimum-only payoffs stretch on for 20-30+ years on a typical card balance.
Does paying only the minimum hurt my credit score?
Making the minimum on time doesn't directly hurt your score - payment history only cares whether you paid, not how much. But carrying a high balance while paying only the minimum keeps your utilization elevated for years, and utilization is roughly 30% of a FICO score.
What happens if I pay less than the minimum?
You'll typically be reported late, hit with a late fee, and risk a penalty APR - often 29%+ - on top of losing any promotional rate. A missed minimum is one of the most damaging events for a credit score, so if you truly can't cover it, call your issuer before the due date rather than after.