Credit card payoff calculator

Each month the tool applies interest to the remaining balance and then subtracts the payment you entered. The process repeats until the balance reaches zero or the payment is too low to reduce the debt meaningfully.

That means the result is driven by three things: balance size, APR and how much you pay each month. Raising the payment usually brings the payoff date forward and cuts interest cost.

Scenario: a borrower has a £4,000 credit card balance at 22.9% APR and can afford £150 per month. The calculator estimates the payoff timeline and the total interest likely to be paid if that payment stays consistent.

If the same borrower increases the payment even modestly, the payoff date usually moves forward noticeably because more of each payment goes toward principal.

The estimate does not try to replicate every provider rule. Some cards have different rates for purchases, cash and transfers, and many providers calculate interest daily rather than with a simple monthly approximation.

It also assumes you stop adding new spending to the balance. If you keep using the card while repaying, the real payoff date can move much further out.

Read How to Pay Off Credit Card Debt in the UK, then compare alternatives with the Balance Transfer Savings Calculator and the Debt Consolidation Savings Calculator.

If APR is the main problem, also review Credit Card APR and Interest Explained and Credit Card Minimum Payments in the UK.

This calculator is most useful for someone repaying a single card balance at a steady APR with a fixed monthly payment in mind. It works well if you are deciding whether your current payment is enough, whether an extra £25 to £100 a month makes a worthwhile difference, or whether the debt is expensive enough to justify switching strategy.

It is less reliable if you are still spending on the card, have several balance types on one account, or expect the rate to change soon. In those cases, the result is still a useful direction check, but it should not be treated as a payment plan you can rely on statement by statement.

A common mistake is entering the minimum payment from one statement and assuming it stays flat. Many card minimums fall as the balance falls, which can slow repayment more than expected if you do not set your own fixed amount. Another is using the representative APR from a comparison page rather than the actual APR shown on your statement.

Cash withdrawals, promotional transfer balances, fees and returned interest-free offers can also distort the result. If part of the balance is on 0% and part is on a purchase APR, the real cost can look very different from a single-rate estimate.

If the balance clears in a timeframe you are comfortable with and the interest cost looks manageable, the next step is usually to lock in that payment and stop using the card for new spending. If the payoff date runs for years or the interest total feels high relative to the balance, test a higher payment first and see whether the reduction is meaningful enough to keep the plan simple.

If a modest payment increase barely changes the outcome, compare alternatives. A 0% balance transfer may be cheaper if you can clear the balance during the promotional period and the fee is reasonable. Debt consolidation can make sense when several debts are scattered across cards and loans, but only if the total cost and repayment discipline are better than staying where you are.