Answers · UK 2025/26
How much are mortgage repayments on a £400,000 mortgage in the UK?
A £400,000 repayment mortgage at 4.5% over 25 years costs approximately £2,223/month (£666,999 total). At 5%, monthly payments rise to about £2,338 (£701,508 total). Interest-only at 4.5% costs £1,500/month, but the £400,000 capital is still owed at the end.
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For a £400,000 capital-and-interest repayment mortgage in the UK, monthly payments depend on rate and term. 25-year term: 4.0% £2,111/month (£633,404 total); 4.5% £2,223/month (£666,999); 5.0% £2,338/month (£701,508); 5.5% £2,456/month (£736,905); 6.0% £2,577/month (£773,162). 30-year term: 4.0% £1,910/month (£687,478); 4.5% £2,027/month (£729,627); 5.0% £2,147/month (£773,023); 6.0% £2,398/month (£863,353). Interest-only at 4.5%: £1,500/month, with the £400,000 capital still owed at the end of the term. This level of borrowing typically requires gross household income of roughly £89,000 to £100,000 under standard 4-4.5x affordability multiples, though many lenders also apply a stress-tested rate several points above the actual product rate. A 10% deposit on a £445,000 property (90% LTV) reaches most mainstream lenders, while a larger deposit unlocks better rates. Use the mortgage calculator to model your exact figures.
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This answer is informational only and does not constitute financial, tax or legal advice. Figures are for the 2025/26 UK tax year. See our methodology and sources.