Debt guides
Use this credit card payoff calculator to see exactly when your balance clears, what the debt costs in interest, and how changes to your monthly payment alter the result. If it feels like your balance barely moves, this page shows whether the problem is the payment, the rate, or both.
Decision one
The answer comes down to how much of your payment actually reduces the balance after interest is charged. If that reduction is thin each month, the debt lasts far longer than most people expect, even when the account itself looks under control.
Decision two
That is the figure people often overlook. A plan can look manageable until the total interest sits beside it in black and white. On a typical UK purchase APR in the high teens or twenties, carrying debt for years becomes expensive quickly.
Decision three
In many cases, yes. A relatively small fixed increase often saves months or years. The point of the comparison is to show whether your next best move is simply paying more, or whether a lower-rate option does more for you.
Before you calculate
This calculator is most useful when you treat it as a decision page, not just a quick curiosity. Use the balance you are actually carrying, the APR that really applies, and the monthly payment you could keep up with in an ordinary month rather than on your best month.
You will then see three things straight away: how long it takes to clear the debt, how much interest is charged before you are done, and whether a slightly stronger payment changes the result enough to justify the extra cash. That makes it much easier to decide whether your current plan is sound or needs changing now.
Run one version that reflects what you are paying now, one that adds a realistic overpayment, and one that reflects an alternative such as a 0% balance transfer period. Interpret the result carefully: the maths is clear, but real-world outcomes still depend on whether you stop spending on the card and keep the payments consistent.
Calculator
Use figures you could keep up with in an ordinary month. The aim is not to predict your statement to the penny. It is to show whether your current payment clears the balance properly, what the interest costs, and whether paying more or reducing the rate is the stronger move.
Enter your details and select Calculate to estimate how long repayment takes, how much interest is charged, and how much faster the balance clears if you pay more.
Your estimated payoff time, total interest and repayment summary will appear here after calculation.
At this pace, the balance could clear by —.
With a monthly payment of — and an extra payment of —, the balance would clear in —. Read that alongside the interest figure, not on its own. If repayment runs beyond roughly four to five years, the debt is usually inefficiently structured. If a modest payment increase removes a large chunk of time, you have a clear leverage opportunity. This estimate assumes a fixed APR, no additional spending and steady monthly payments. If your card uses daily interest, changing minimums or multiple rate buckets, your real statement timeline can differ.
Interpret the result
The payoff date matters, but the more useful question is whether the debt is being cleared efficiently. Look at the timeline, the interest total and the effect of a higher payment together. That combination tells you whether your current plan is sound, too slow, or plainly too expensive.
If repayment runs beyond roughly four to five years, the balance is usually being cleared too slowly. At that point the debt costs more than it should, and there is more time for extra spending, rate changes or budget pressure to undo progress.
If the total interest is a large share of the balance, you are dealing with high-cost debt. In practical terms, if a £3,500 balance is set to generate many hundreds of pounds in interest, the rate is no longer a minor detail. It is driving the result.
Three signs stand out. First, the balance takes much longer to clear than expected. Second, the interest total looks uncomfortably large relative to the debt itself. Third, a relatively small payment increase removes years rather than months. That usually means the current payment is too weak for the APR you are carrying.
Take a £3,500 balance at 24.9% APR. Scenario A uses a £150 monthly payment. Scenario B uses a £200 monthly payment. The balance and rate stay the same; only the payment changes.
At £150 a month, the balance clears in about 2 years and 9 months and costs about £1,335 in interest. At £200 a month, it clears in about 1 year and 10 months and costs about £894 in interest. That saves roughly 11 months and about £441 in interest.
If you only pay the minimum, repayment often becomes painfully slow because a large share of each payment goes on interest first. On many UK cards, especially where the APR is in the high teens or twenties, minimum-only repayment can keep the balance alive for years. It is the classic situation where people feel they are paying every month but not really getting anywhere.
That is why the minimum should be treated as a safety net, not a repayment strategy. Put your minimum payment into the calculator, then compare it with a slightly higher fixed amount. The gap in time and interest is often much bigger than expected.
If you are only managing minimum payments, using credit for food, bills or other essentials, carrying several balances at once, or seeing little progress after months of paying, it is worth stepping back and reviewing the wider picture. In that situation, compare lower-interest options, look for ways to simplify repayment, and consider getting further guidance before the debt becomes harder to control.
Use the result as a planning tool, not a guarantee. Credit card debt can look tidy on paper right up until extra spending, fees or a rate change push it back the other way.
Compare next
The right answer is not always to pay more at the current rate. Sometimes the stronger move is to lower the rate first or simplify the wider debt picture. Use these comparisons to judge which option gives the clearest improvement.
Best when: You can afford a fixed overpayment every month without straining the rest of your budget.
Best when: You qualify for a lower or 0% deal and can clear a meaningful part of the balance before the offer ends.
Best when: You have several debts, want one fixed monthly payment and can secure a lower overall rate.
Use the result as a solid estimate, not a promise. It assumes you do not add further spending to the card, the interest rate stays fixed, and your payments remain steady. It also excludes late fees, transfer fees, changing promotional offers and cards that split the balance across different rates. If you are comparing a 0% offer, run the figures for the promotional period and then test the follow-on APR as well.
Run three versions: what you are paying now, what you could pay without strain, and the alternative route you are considering. That might be a larger monthly payment, a transfer to a cheaper rate, or a broader debt plan. When one option clearly cuts both time and interest without making your budget fragile, you usually have the answer you need.
FAQ
Many UK credit cards calculate interest daily rather than in tidy monthly blocks, so real statements rarely line up exactly with a simplified calculator. Fees, promotional rates ending, changing minimum payment rules and any new spending can all shift the real payoff date. The calculator is still useful, but it should be treated as a planning estimate rather than a copy of your next statement.
Minimum payments usually keep the account in order, but they often do a poor job of clearing the debt quickly. When the APR is high, a large part of the payment goes on interest first, which is why the balance can seem to barely move. If you want a realistic sense of the impact, put your usual minimum into the calculator and compare it with a slightly higher fixed payment.
Use the APR that actually applies to the part of the balance you are trying to clear. That could be the purchase rate, a cash rate or a balance transfer rate. If different parts of the debt are charged at different rates, the result becomes more approximate, but it still helps you judge whether the overall repayment plan is sensible.
Almost always, yes. An extra payment reduces the balance sooner, which means less is left for interest to be charged next month. The key is consistency. A fixed overpayment you can keep up with is usually more useful than ambitious one-off payments that never quite happen.
Yes. Enter 0% APR to estimate what progress you could make during the promotional period, then run the calculation again using the follow-on APR. That second step matters because many 0% balance transfer offers solve the interest problem only temporarily unless you have a proper plan for what happens when the deal ends.
That depends on the rate you are paying now, whether you can qualify for a better deal and how disciplined you would be with the cheaper rate. Overpaying is simple and reliable. A balance transfer is stronger when the fee is sensible and you can make real progress before the promotional period ends. If not, the switch can turn into a delay rather than a solution.
This tool works in monthly steps rather than matching the exact timing of your statement cycle. So if you pay mid-month, early, or in several chunks, the overall payoff month is still useful for planning, but the exact interest on your real statement may differ slightly. That is normal with this sort of estimate.
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