£510,000 Mortgage Repayments (2026)
A £510,000 repayment mortgage at 5% over 25 years costs £2,981 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% | £3,646 | £2,958 | £2,553 | £2,290 | £2,108 |
| 4% | £3,772 | £3,090 | £2,692 | £2,435 | £2,258 |
| 4.5% | £3,901 | £3,227 | £2,835 | £2,584 | £2,414 |
| 5% | £4,033 | £3,366 | £2,981 | £2,738 | £2,574 |
| 5.5% | £4,167 | £3,508 | £3,132 | £2,896 | £2,739 |
| 6% | £4,304 | £3,654 | £3,286 | £3,058 | £2,908 |
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 £510,000 mortgage?
At a 5% interest rate over 25 years, a £510,000 repayment mortgage costs £2,981 a month — £894,423 repaid in total over the term. At 4% the same mortgage is £2,692 a month, and stretching to 30 years at 5% lowers the payment to £2,738.
How does the term length change the cost?
Longer terms cut the monthly payment but increase the total interest dramatically. On £510,000 at 5%, a 15-year term costs £4,033 a month (£725,949 total), while a 35-year term costs £2,574 a month but £1,081,041 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.