UK Mortgage Calculator
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Estimate your monthly mortgage payment, total interest, and payoff date with a clear breakdown. Add overpayments to see how much time and interest you could save.
Enter your mortgage details and click Calculate to see results
Monthly repayment examples over 25 years
The table below shows estimated monthly repayments for common mortgage amounts at 4%, 4.5%, and 5% interest rates over a 25-year term. Use it to quickly benchmark a mortgage before entering your own figures above. The UK government also offers guidance on how much you can borrow — typically 4–4.5x your annual gross salary.
| Mortgage amount | 4% / 25yr | 4.5% / 25yr | 5% / 25yr |
|---|---|---|---|
| £150,000 | £792/mo | £834/mo | £877/mo |
| £200,000 | £1,056/mo | £1,112/mo | £1,169/mo |
| £250,000 | £1,320/mo | £1,390/mo | £1,461/mo |
| £300,000 | £1,584/mo | £1,668/mo | £1,754/mo |
| £350,000 | £1,847/mo | £1,945/mo | £2,046/mo |
| £400,000 | £2,111/mo | £2,223/mo | £2,338/mo |
Repayment mortgage, fixed rate, 25-year term. Excludes fees, insurance, and stamp duty.
How much mortgage can I get on my salary?
UK lenders typically offer 4 to 4.5 times your annual gross salary. Some lenders go up to 5x for strong applications. The table below shows typical borrowing ranges for common salary levels.
| Annual salary | At 4x | At 4.5x | At 5x |
|---|---|---|---|
| £25,000 | £100,000 | £112,500 | £125,000 |
| £30,000 | £120,000 | £135,000 | £150,000 |
| £35,000 | £140,000 | £157,500 | £175,000 |
| £40,000 | £160,000 | £180,000 | £200,000 |
| £50,000 | £200,000 | £225,000 | £250,000 |
| £60,000 | £240,000 | £270,000 | £300,000 |
| £75,000 | £300,000 | £337,500 | £375,000 |
Indicative only. Actual limits depend on credit score, existing debts, deposit size, and lender criteria.
How this mortgage calculator works
Enter the property price, deposit, interest rate, and loan term. The calculator subtracts your deposit from the property price to find your loan amount. It then applies the standard mortgage amortisation formula to calculate a fixed monthly payment that repays both interest and principal over the chosen term.
The results show your estimated monthly payment, total interest, total repayment, and an estimated payoff date. If you add an optional monthly overpayment, the calculator estimates how many years you could save and how much interest you could avoid by paying extra each month.
What's included in the calculation
The calculation includes the loan amount, interest rate, loan term, and any monthly overpayment. It uses a standard repayment mortgage formula with monthly compounding to estimate the payment schedule and total interest paid over the full term.
It does not include mortgage fees, stamp duty, valuation costs, insurance, or council tax. It also does not model variable-rate changes or introductory fixed-rate periods. For those, run multiple scenarios with different rates or terms.
Assumptions and rounding rules
Results assume a fixed interest rate for the full term and payments made monthly. Overpayments are treated as a steady monthly amount added to the standard payment. Totals are rounded to the nearest penny and shown as rounded currency values for readability.
If your rate changes, you take a payment holiday, or you make irregular overpayments, your actual payoff date and total interest will differ. Use this calculator as a planning tool rather than an exact forecast.
Worked examples
Example 1: A £300,000 property with a £30,000 deposit, 4.5% rate, and 25-year term produces a loan of £270,000 and a monthly payment of about £1,500.75. Total interest is roughly £180,224 with a payoff around February 2051.
Example 2: A £450,000 property with a £90,000 deposit, 5.0% rate, and 30-year term produces a payment of about £1,932.56. Adding a £200 monthly overpayment shortens the term to about 24.33 years and saves roughly £72,417 in interest, with payoff around June 2050.
Example 3: A £200,000 property with a £40,000 deposit, 3.75% rate, and 20-year term gives a payment near £948.62 and total interest around £67,669, with payoff around February 2046.
Frequently Asked Questions
Related calculators and guides
Explore related tools to understand affordability and compare different financial scenarios.
- Take-Home Pay Calculator to estimate your net income for affordability checks.
- Net to Gross Calculator to work out the salary needed to hit a target budget.
- Debt Repayment Calculator to see how other debt affects monthly cash flow.
- Salary Comparison Calculator to evaluate pay offers after deductions.
- Mortgage Interest Guide for a deeper explanation of how interest is calculated.
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