Updated for 2026/27
Monthly payment on a £300,000 mortgage
Quick answer
A £300,000 repayment mortgage over 25 years at 5% costs about £1,754 a month. Over the full term you'd repay £526,131 in total, including £226,131 of interest.
Reviewed by TaxFly Editorial Team
How we calculate
- Mortgage amount
- £300,000
- Interest rate
- 5%
- Term
- 25 years
- Total interest
- £226,131
- Monthly payment
- £1,754
What are the monthly repayments on a £300,000 mortgage?
A £300,000 repayment mortgage at 5% over 25 years works out to roughly £1,754 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% | £1,584 | £1,432 |
| 4.5% | £1,667 | £1,520 |
| 5.0% | £1,754 | £1,610 |
| 5.5% | £1,842 | £1,703 |
| 6.0% | £1,933 | £1,799 |
How much interest will you pay?
Over the 25-year term you'd pay about £226,131 in interest on top of the £300,000 borrowed — a total of £526,131. 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 £1,754 a month on a 25-year repayment mortgage at 5%. A different rate or term changes this — see the table above.
Around £226,131 over 25 years at 5%, making £526,131 repaid in total.
Lenders typically cap borrowing at about 4.5× income, so roughly £66,667 household income — though this varies. Check affordability on our mortgage tools.
