Credit Card Repayment Calculator
See how long it takes to clear a card balance and what it costs.
Time to clear
2 yr 1 mo
- Total interest
- £678.37
- Total repaid
- £3,678.37
v1.0 · Reviewed September 2026
How this is worked out
The APR is converted to a monthly rate as (1 + APR)^(1/12) − 1, then interest is added and your payment deducted each month until the balance clears.
Worked example
- Balance £3,000
- APR 21.9%
- £150 a month
2 yr 1 mo to clear, costing £678.37 in interest
Assumptions and limits
- Assumes a fixed payment every month and no new spending on the card. Paying only the minimum, which falls as the balance drops, takes far longer.
- If the payment is less than the monthly interest the balance never clears, and the calculator says so instead of showing a number.
- Promotional 0% periods, fees and default charges are not modelled.