Household
Mortgage repayment calculator
Estimate a UK mortgage payment on a repayment or interest-only basis, including a monthly overpayment, a lump sum, the interest saved, and an early-repayment allowance.
Rates last checked on 9 November 2026.
Leave at 0 if you are not overpaying.
Month 1 is the first payment.
Optional. For example 10 for 10% of the amount borrowed each year.
Year by year
| Period | Paid | Interest | Capital | Balance |
|---|---|---|---|---|
| Year 1 | £13,339.92 | £8,909.37 | £4,430.55 | £195,569.45 |
| Year 2 | £13,339.92 | £8,705.83 | £4,634.09 | £190,935.36 |
| Year 3 | £13,339.92 | £8,492.92 | £4,847.00 | £186,088.36 |
| Year 4 | £13,339.92 | £8,270.26 | £5,069.66 | £181,018.70 |
| Year 5 | £13,339.92 | £8,037.36 | £5,302.56 | £175,716.14 |
| Year 6 | £13,339.92 | £7,793.76 | £5,546.16 | £170,169.98 |
| Year 7 | £13,339.92 | £7,538.96 | £5,800.96 | £164,369.02 |
| Year 8 | £13,339.92 | £7,272.49 | £6,067.43 | £158,301.59 |
| Year 9 | £13,339.92 | £6,993.74 | £6,346.18 | £151,955.41 |
| Year 10 | £13,339.92 | £6,702.20 | £6,637.72 | £145,317.69 |
| Year 11 | £13,339.92 | £6,397.27 | £6,942.65 | £138,375.04 |
| Year 12 | £13,339.92 | £6,078.31 | £7,261.61 | £131,113.43 |
| Year 13 | £13,339.92 | £5,744.72 | £7,595.20 | £123,518.23 |
| Year 14 | £13,339.92 | £5,395.80 | £7,944.12 | £115,574.11 |
| Year 15 | £13,339.92 | £5,030.85 | £8,309.07 | £107,265.04 |
| Year 16 | £13,339.92 | £4,649.12 | £8,690.80 | £98,574.24 |
| Year 17 | £13,339.92 | £4,249.88 | £9,090.04 | £89,484.20 |
| Year 18 | £13,339.92 | £3,832.29 | £9,507.63 | £79,976.57 |
| Year 19 | £13,339.92 | £3,395.51 | £9,944.41 | £70,032.16 |
| Year 20 | £13,339.92 | £2,938.65 | £10,401.27 | £59,630.89 |
| Year 21 | £13,339.92 | £2,460.84 | £10,879.08 | £48,751.81 |
| Year 22 | £13,339.92 | £1,961.05 | £11,378.87 | £37,372.94 |
| Year 23 | £13,339.92 | £1,438.31 | £11,901.61 | £25,471.33 |
| Year 24 | £13,339.92 | £891.54 | £12,448.38 | £13,022.95 |
| Year 25 | £13,342.61 | £319.66 | £13,022.95 | £0.00 |
Each month
£1,111.66
- Interest over the term
- £133,500.69
- Paid in total
- £333,500.69
- Balance at the end
- £0.00
The annual rate is divided by 12. Fees are not included.
How this is worked out
A repayment mortgage pays interest and capital each month. Early payments are mostly interest. An interest-only mortgage pays the interest and leaves the capital to be repaid at the end, from savings or another plan.
The monthly repayment here uses the standard formula. The annual rate you enter is divided by 12. Each month's interest is rounded to the nearest penny, and the last payment clears any odd pence. Fees, the annual percentage rate of charge, and a lender's daily-interest convention are not included, so a formal illustration can differ.
A monthly overpayment, and a one-off lump sum, are added on top of the contractual payment and the term gets shorter. The page shows the payoff date, the interest saved, and the total you pay with and without the extras. You can enter an early-repayment allowance, such as 10% of the amount borrowed each year. If the extras go over it, the page warns you. Some lenders reduce the monthly payment instead and keep the term, or count the allowance on an anniversary balance. Check your offer before you rely on the saving.
Questions
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For guidance only. This is not financial advice, legal advice, or a mortgage offer. Check the original invoice, contract, or lender illustration before you rely on a figure.
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