£400,000 Mortgage Repayments (2026)
A £400,000 repayment mortgage at 5% over 25 years costs £2,338 a month. The table below covers rates from 3.5% to 6% and terms from 15 to 35 years.
| Rate | 15 yrs | 20 yrs | 25 yrs | 30 yrs | 35 yrs |
|---|---|---|---|---|---|
| 3.5% | £2,860 | £2,320 | £2,002 | £1,796 | £1,653 |
| 4% | £2,959 | £2,424 | £2,111 | £1,910 | £1,771 |
| 4.5% | £3,060 | £2,531 | £2,223 | £2,027 | £1,893 |
| 5% | £3,163 | £2,640 | £2,338 | £2,147 | £2,019 |
| 5.5% | £3,268 | £2,752 | £2,456 | £2,271 | £2,148 |
| 6% | £3,375 | £2,866 | £2,577 | £2,398 | £2,281 |
Different amount or rate? Use the mortgage repayment calculator.
How it's worked out
Figures use the standard repayment-mortgage formula (capital and interest, equal monthly payments): payment = loan × monthly rate ÷ (1 − (1 + monthly rate)−months). They assume the rate stays the same for the whole term — in practice you'll re-fix every few years. Product fees, valuation fees and overpayments are not included.
FAQ
What are the monthly repayments on a £400,000 mortgage?
At a 5% interest rate over 25 years, a £400,000 repayment mortgage costs £2,338 a month — £701,508 repaid in total over the term. At 4% the same mortgage is £2,111 a month, and stretching to 30 years at 5% lowers the payment to £2,147.
How does the term length change the cost?
Longer terms cut the monthly payment but increase the total interest dramatically. On £400,000 at 5%, a 15-year term costs £3,163 a month (£569,371 total), while a 35-year term costs £2,019 a month but £847,875 in total — the longer term repays far more interest for the same loan.
Are these figures exact quotes?
No — they are standard repayment-mortgage arithmetic (capital and interest, fixed rate for the whole term) to help you budget. A real offer depends on your deal period, fees, loan-to-value and credit profile, and rates change when a fixed deal ends. Interest-only mortgages cost less per month but repay none of the capital.