Why a single-card payoff view still matters
Many households juggle several cards, but the question people type into search is often about one balance: “If I pay $400 a month on this 22% card, when am I done?” This calculator answers that with monthly compounding, and the inverse question: “What payment clears this balance in N months?”
Credit-card interest is usually calculated from your issuer’s daily or monthly periodic rate. Our model uses APR ÷ 12 applied to the remaining balance each month after interest accrues and before your payment — a transparent amortisation sketch that matches how most consumer payoff estimators behave. Issuer statements can differ by a few dollars because of daily balances, grace periods on new purchases and fee timing.
Mode one: fixed payment
Enter balance, APR and the payment you can sustain. The tool returns months to zero, total interest and total cash out the door. If your payment is at or below the first month’s interest, payoff is impossible — the balance grows. That is the mathematical core of the minimum-payment trap.
Mode two: target date
Pick a month count (for example 12 or 24). The tool solves the standard loan payment formula for the required monthly amount, then verifies with the same month-by-month engine. Use this when you want the card gone before a wedding, move or rate-promo expiry.
Grace periods and new purchases
If you carry a balance, new purchases often begin accruing interest immediately — you may lose the grace period. The cleanest payoff path is usually: stop new charges on that card, pay more than interest + principal stretch, and keep autopay at least at the minimum so you never miss a due date while you accelerate.
Pair this page with the minimum-payment cost calculator to see how expensive “easy” minimums become, and with the snowball / avalanche planner when several cards compete for the same extra dollars.
APR types to watch
Purchase APR, balance-transfer APR, cash-advance APR and penalty APR can all differ. Cash advances usually have no grace period and higher APRs. Deferred-interest promotions can charge a backlog of interest if any balance remains when the promo ends. Enter the APR that actually applies to the balance you are modelling.
For regulatory background on how card pricing is disclosed, see the CFPB’s credit-card resources linked in Sources. This page is general arithmetic, not an offer to lend or alter your account terms.
Privacy and honesty
Calculations run locally in your browser on DebtClear. We do not need an account and we do not receive the numbers you type. Advertisers help keep the tools free; ads are labelled. Affiliate links, when present, use rel="sponsored" and are described in the affiliate disclosure.
This site is not a lender, debt settler or credit counselor. Results are estimates. Confirm APRs, fees and payoff quotes with your issuer. For complaints or collection rights, start with consumerfinance.gov and ftc.gov.