Mortgage Repayment Calculator UK
Work out an estimated monthly mortgage payment based on the property price, deposit, interest rate, and term.
Mortgage Repayment Calculator
Estimate your monthly mortgage repayment.
Monthly payment
£—
Total interest
£—
Loan-to-value
—%
Estimate only. Excludes lender fees, broker fees, valuation, insurance, and rate changes.
Request a Broker CallbackHow to use this calculator
- Property price — the agreed price or your budget if you’re still searching.
- Deposit — your contribution. The remainder becomes the mortgage.
- Interest rate — the rate quoted on the mortgage product.
- Term — how many years you’ll spread the loan over. Common UK terms are 25–35 years.
- Repayment type — most residential mortgages are capital + interest. Interest-only is mainly used for buy-to-let.
What the result means
The “monthly payment” is the amount you’d pay each month on a level repayment basis. “Total interest” is the cumulative interest across the full term — useful for comparing 25-year vs 30-year terms. “Loan-to-value” is the mortgage as a percentage of the property price; lower LTV usually unlocks better rates.
Things this calculator does not include
- Lender product fees and broker fees.
- Valuation, conveyancing and stamp duty.
- Buildings insurance.
- Future rate changes when your fixed deal ends.
- Your personal affordability assessment.
Want help comparing options?
If you’d like an authorised mortgage adviser or broker partner to look at the actual products you could apply for, request a callback. There’s no obligation.
Frequently asked questions
Is this a real UK mortgage repayment calculator? +
Yes. It uses the standard amortisation formula UK lenders use to calculate monthly repayments for capital + interest mortgages, and a simple interest-only calculation if you choose that option.
Does the calculator include fees? +
No. The headline figure is principal + interest only. Lender arrangement fees, valuation fees, broker fees, ERCs and insurance are not included.
Why is my actual payment different? +
Lenders calculate to the penny, factor in payment dates, and may apply early-month or end-month interest accrual differently. Your offer is the source of truth.
Should I use a 25 or 30 year term? +
Longer terms lower the monthly payment but raise total interest. Many UK mortgages run 25–35 years. Use the calculator to compare both.
How does interest-only work? +
Interest-only payments cover only the interest each month. The loan balance does not reduce — you need a separate repayment plan agreed with the lender.