UK Mortgage Calculator
Calculate your UK mortgage repayment, total interest and full cost using standard UK repayment terms, in pounds.
Monthly repayment
£1,583.51
Total repayment
£475,053
Total interest
£175,053
Interest share
37%
UK mortgages usually charge interest monthly on the outstanding balance. Your actual rate depends on the fixed-rate deal and lender.
How it works
Repayment: M = P × r(1+r)ⁿ ÷ ((1+r)ⁿ − 1), r = rate ÷ 12. Income multiple: loan ≈ 4.5 × gross income.
Example: £250,000 at 4.5% over 25 years → £1,389/month repayment.
UK Mortgage Calculator on True Calculator gives you an instant, accurate answer with no sign-up and no app install. Calculate your UK mortgage repayment, total interest and full cost using standard UK repayment terms, in pounds. Every result shows the formula and a worked example so you can verify the calculation yourself, and all values are computed in your own browser — your numbers never leave your device.
Popular uses: uk mortgage calculator · mortgage calculator uk · uk mortgage repayment calculator
Last updated: August 2026
How We Calculate
This calculator uses standard mathematical formulas verified by our team. All calculations are performed instantly in your browser using JavaScript — no data is sent to any server. The formulas used are industry-standard and match those used by banks, financial institutions and health organizations.
For financial calculators, we use RBI-approved formulas and regularly updated bank rates. For health calculators, we use WHO-recommended formulas and medical standards. All rates and standards are sourced from official government and regulatory websites.
Frequently Asked Questions
How is a UK mortgage payment calculated?
The UK calculator uses the same amortising formula with a monthly rate of (annual rate ÷ 12). Your payment is the fixed amount needed to clear principal and interest over the chosen term.
Should I use repayment or interest-only in the UK?
Repayment clears the full balance by the end of the term, so you own the home outright. Interest-only has lower monthly payments but the full loan amount is still due at the end, which suits specific plans.
What does the UK affordability check involve?
Lenders typically cap borrowing at about 4–4.5 times your gross annual income and stress-test payments against a higher rate. Use this calculator to estimate a realistic mortgage based on your income.
Is this UK mortgage calculator free to use?
Yes, True Calculator's UK mortgage calculator is completely free with no sign-up, no app install and no usage limits.
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