Credit Card Payoff Calculator
A credit card minimum payment is designed to keep an account current, not to clear it. On a typical balance it recovers a small percentage plus that month's interest, which produces a repayment period measured in years and an interest total that frequently approaches the original balance.
The calculator below shows both paths at once: what a fixed payment you choose actually achieves, and what the minimum-only alternative costs in time and interest. The gap between them is usually the most persuasive number on the page.
Compare a fixed payment against the minimum
Your APR is on the statement. Use the purchase APR unless the balance is a cash advance or a promotional transfer, which carry their own rates.
Why the minimum takes so long
A minimum payment is typically a small percentage of the balance plus accrued interest, floored at a fixed dollar amount. Because the percentage applies to a shrinking balance, the payment shrinks too, and each month removes a little less principal than the last.
The result is a curve that flattens badly. Early payments make visible progress; later ones barely move the balance, which is why people paying minimums often report feeling the debt is not going down at all. It is going down, extremely slowly, and the interest is compounding against what remains.
A fixed payment breaks the pattern entirely. Holding the amount constant as the balance falls means an increasing share goes to principal every month, and the payoff accelerates rather than stalling.
Card interest is charged daily
Card issuers convert the APR into a daily periodic rate and apply it to the balance each day, then bill the accumulated interest monthly. Compounding daily rather than monthly makes the effective cost slightly higher than the stated APR suggests.
It also means the date you pay matters. A payment made mid-cycle reduces the balance that interest is calculated against for the remaining days, so paying earlier costs less than paying the same amount on the due date.
The grace period is the exception worth protecting: pay the statement balance in full each month and no interest is charged on purchases at all. Carry any balance and the grace period typically lapses, so new purchases start accruing immediately — which is why a card carrying a balance should not also be the card you spend on.
Cash advances usually carry a higher rate with no grace period at all, so interest starts the day the money is taken.
How payments are allocated across rates
A card frequently carries several balances at different rates — purchases, a balance transfer at a promotional rate, and cash advances at the highest. Federal rules require that any amount paid above the minimum be applied to the highest-rate balance first.
The corollary is that the minimum itself can be applied to the lowest, which is how a promotional transfer can sit untouched while an expensive purchase balance grows. Paying only the minimum on a card with mixed balances is therefore worse than the headline APR implies.
When a promotional period ends, the remaining transferred balance reverts to the standard rate. Diary that date when you make the transfer, because it is the point at which a good decision becomes an expensive one.
Balance transfers, and when they help
- They work when the transfer fee is smaller than the interest avoided, and when you can clear the balance within the promotional window.
- They fail when the fee is paid, the window lapses and the balance is still there at the standard rate.
- Transferring does not reduce the debt. It moves it, and the freed limit on the old card is where people quietly rebuild it.
- A new card also means a new application, a hard credit inquiry and a lower average account age.
- Run the numbers before applying: fee, promotional length, and the fixed monthly payment that clears the balance inside the window.
Order of attack across several cards
With more than one card the arithmetic favours highest rate first — the avalanche — because interest is the thing being minimised and the highest rate generates the most of it.
The alternative, smallest balance first, closes accounts sooner and produces visible progress earlier. It costs more in total and finishes more repayment plans, which is not a trivial advantage for anyone who has abandoned this before.
Either way, the mechanism is the same: minimums on everything, every spare dollar onto one target, and the freed payment rolled onto the next when a card clears. The dedicated debt payoff calculator runs both orders side by side.
What to do about the rate itself
Card APRs are negotiable more often than people expect. An account in good standing with a solid payment history is worth keeping, and issuers have retention teams with authority to reduce a rate — the request costs one phone call and a refusal changes nothing.
Where the debt is genuinely unmanageable, a nonprofit credit counselling agency can arrange a debt management plan with reduced rates negotiated across creditors. That is a different thing from a for-profit debt settlement company, which typically instructs you to stop paying, damages credit severely and charges a substantial fee for the result.
Whatever the route, stop adding to the balance first. No payoff plan survives continued spending on the account it is trying to clear.
Frequently asked questions
It depends almost entirely on whether the payment is fixed or a minimum. A fixed payment accelerates as the balance falls; a percentage-based minimum shrinks with the balance, which is why it can take years and cost close to the original amount in interest.
Because a minimum payment covers that month's interest plus a small slice of principal, and the slice shrinks as the balance does. Switching to a fixed amount — the same figure every month — changes the shape of the payoff immediately.
Typically yes. The APR is converted to a daily periodic rate applied to the balance each day, then billed monthly. That is also why paying mid-cycle costs slightly less than paying the same amount on the due date.
Only when the transfer fee is less than the interest avoided and you clear the balance before the promotional rate ends. If the window lapses with a balance remaining, you have paid a fee for nothing.