Mortgage Calculators

Free tools to help you understand your mortgage costs. Instant results — no sign-up required.

Mortgage Overpayment Calculator

See how much interest and time you can save by making overpayments on your mortgage.

Calculate how much Stamp Duty Land Tax you'll pay when buying a property in England or Northern Ireland.

Estimate how much you can borrow based on your income and outgoings.

Calculate your loan-to-value ratio to understand which mortgage deals you can access.

Compare interest-only and repayment mortgage monthly costs and total amounts paid.

Find out how much you could save by switching to a new mortgage deal.

Calculate the cost of leaving your mortgage deal early and whether switching still makes sense.

Work out your monthly costs for a shared ownership property, including mortgage and rent payments.