Updated for 2026/27
Monthly payment on a £400,000 mortgage
Quick answer
A £400,000 repayment mortgage over 25 years at 5% costs about £2,338 a month. Over the full term you'd repay £701,508 in total, including £301,508 of interest.
Reviewed by TaxFly Editorial Team
How we calculate
- Mortgage amount
- £400,000
- Interest rate
- 5%
- Term
- 25 years
- Total interest
- £301,508
- Monthly payment
- £2,338
What are the monthly repayments on a £400,000 mortgage?
A £400,000 repayment mortgage at 5% over 25 years works out to roughly £2,338 a month. The rate you're offered makes a big difference, so here's how the monthly payment changes:
| Rate | 25-yr monthly | 30-yr monthly |
|---|---|---|
| 4.0% | £2,111 | £1,910 |
| 4.5% | £2,223 | £2,027 |
| 5.0% | £2,338 | £2,147 |
| 5.5% | £2,456 | £2,271 |
| 6.0% | £2,577 | £2,398 |
How much interest will you pay?
Over the 25-year term you'd pay about £301,508 in interest on top of the £400,000 borrowed — a total of £701,508. Overpaying even a small amount each month can cut years off the term and save thousands. Model overpayments and compare deals on the mortgage calculator.
Other mortgage amounts
Frequently asked questions
About £2,338 a month on a 25-year repayment mortgage at 5%. A different rate or term changes this — see the table above.
Around £301,508 over 25 years at 5%, making £701,508 repaid in total.
Lenders typically cap borrowing at about 4.5× income, so roughly £88,889 household income — though this varies. Check affordability on our mortgage tools.
