Credit Card Repayment Calculator
Paying only the minimum on a credit card feels manageable month to month, but the true cost of doing so for years, rather than just occasionally, is easy to underestimate — a balance that could be cleared in a couple of years with a realistic fixed payment can instead take decades at the minimum, and cost several times the original amount in interest along the way. This calculator shows exactly how long your specific balance would take to clear, and what increasing your payment would actually save.
Credit Card Minimum Repayment Calculator
See how long it takes to clear your credit card balance making only minimum payments.
The Minimum Payment That Never Actually Pays Anything Off
There is a genuine trap worth understanding clearly: if your minimum payment is lower than the interest being charged that month, the balance does not shrink at all — it grows, even while payments are being made faithfully every month. This calculator checks for exactly this scenario and flags it directly, since it is one of the more serious situations a cardholder can be in without necessarily realising it, particularly on a card with a high APR and a minimum payment set as a small percentage of the balance.
This can happen quietly on a card with a very low minimum payment percentage combined with a high APR, and the monthly statement can look entirely normal — a payment made, a balance shown — without it being obvious that the balance shown is actually higher than the month before, unless the two figures are specifically compared.
Why Minimum Payments Aren’t Calculated the Same Way Everywhere
Different cards define “minimum payment” differently, and the difference genuinely matters. Some set it as a fixed percentage of the outstanding balance, which shrinks in pound terms as the balance falls, meaning the payment itself gets smaller over time even as the payoff drags on. Others set it as interest plus a small fixed percentage, which behaves somewhat similarly. A small number of cards set a genuinely fixed minimum amount, which does not reduce as the balance falls, actually accelerating payoff compared with a percentage-based minimum on an identical balance and rate. Entering the correct type for your specific card matters considerably for getting an accurate result here.
Your card provider’s terms and conditions, or the small print on a statement, will state which method applies — worth checking directly rather than assuming, since the difference between a percentage-based and fixed minimum can noticeably change how long minimum-only repayment actually takes on the same starting balance.
The Real Cost of “Just Paying the Minimum”
On a meaningful balance at a typical credit card APR, minimum-only repayment routinely takes well over a decade, sometimes multiple decades, and the total interest paid over that period can comfortably exceed the original balance itself — in effect, paying for the same purchase more than twice over. This is not a worst-case scenario; it is the mathematically expected outcome of a percentage-based minimum payment structure on a balance that is not otherwise being paid down faster. If a 0% balance transfer might be a better route than continuing to pay down the current card, our Balance Transfer Calculator compares that option directly.
What a Small Payment Increase Actually Buys You
Because of how compounding interest works in reverse on debt, a relatively modest increase above the minimum payment often cuts the payoff time far more than the percentage increase in payment might suggest — doubling a low minimum payment can sometimes cut years, not just months, off the total time to clear the balance, since a larger share of every payment goes toward the principal rather than simply covering that month’s interest. This calculator lets you compare the minimum payment scenario directly against a fixed payment of your choosing, so the size of that difference is visible in your own numbers rather than as a general statement. If you are managing more than one debt at once, our Debt Consolidation Calculator looks at whether combining them into a single loan would work out cheaper overall.
Two Payment Plans, One Balance
A £3,000 balance at 22.9% APR with a minimum payment of 2.5% of the balance takes well over 20 years to clear at minimum-only repayment, with total interest paid comfortably exceeding the original £3,000 balance. The same £3,000 balance repaid with a fixed £150 monthly payment instead clears in roughly two years, with total interest a small fraction of what the minimum-only path would have cost — the same debt, the same rate, an entirely different outcome purely as a result of the payment amount chosen.
Frequently Asked Questions
What should I do if my minimum payment does not cover the interest?
Increasing your payment to at least cover the monthly interest charge is essential, since otherwise the balance will continue growing indefinitely regardless of how consistently you pay. This calculator shows the minimum amount needed to at least stop the balance increasing.
Does paying more than the minimum affect my credit score?
Paying more than the minimum, and reducing your balance faster, generally helps your credit score over time by lowering your credit utilisation ratio, which is a meaningful factor most lenders consider.
Is it better to overpay one card or spread payments across several?
Focusing extra payments on the highest-APR card first, while maintaining minimums on the rest, generally minimises total interest paid across multiple cards, though some people prefer clearing the smallest balance first for the psychological momentum of an early win.
Can my APR change while I am repaying?
Yes — many credit cards have a variable APR that can change, and any introductory rate will typically end after a set period, reverting to a higher standard rate. This calculator assumes a constant rate for the full repayment period.
Should I stop using the card while paying it off?
Continuing to spend on a card you are actively trying to pay down generally works against the repayment plan, since new spending adds back to the balance being paid off, extending the timeline shown here.
Where can I get free help if my debt feels unmanageable?
Free, independent debt advice is available from organisations such as MoneyHelper, StepChange and National Debtline, all of which offer confidential support without charging for it.
Important Information
This calculator provides an estimate for general information purposes only and does not constitute financial advice. It assumes a constant APR and no additional spending on the card throughout the repayment period, which may not reflect your actual card terms. For advice specific to your circumstances, consult a qualified financial adviser or a free debt advice service such as MoneyHelper. See our Disclaimer for further information.