£450,000 Mortgage Repayments (2026)
A £450,000 repayment mortgage at 5% over 25 years costs £2,631 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% | £3,217 | £2,610 | £2,253 | £2,021 | £1,860 |
| 4% | £3,329 | £2,727 | £2,375 | £2,148 | £1,992 |
| 4.5% | £3,442 | £2,847 | £2,501 | £2,280 | £2,130 |
| 5% | £3,559 | £2,970 | £2,631 | £2,416 | £2,271 |
| 5.5% | £3,677 | £3,095 | £2,763 | £2,555 | £2,417 |
| 6% | £3,797 | £3,224 | £2,899 | £2,698 | £2,566 |
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 £450,000 mortgage?
At a 5% interest rate over 25 years, a £450,000 repayment mortgage costs £2,631 a month — £789,197 repaid in total over the term. At 4% the same mortgage is £2,375 a month, and stretching to 30 years at 5% lowers the payment to £2,416.
How does the term length change the cost?
Longer terms cut the monthly payment but increase the total interest dramatically. On £450,000 at 5%, a 15-year term costs £3,559 a month (£640,543 total), while a 35-year term costs £2,271 a month but £953,860 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.