This mortgage calculator uses the standard repayment (capital and interest) formula to show your monthly payment, the total you will repay over the full term, and how much of that is interest. It is a guide only — your lender will confirm exact figures, and rates on fixed deals change when the deal ends.
Buying a home
Get mortgage-ready.
Mortgage advice book
Understand the process.
First-time buyer guide
Buy with confidence.
Affiliate links — as an Amazon Associate ABOS Digital earns from qualifying purchases.
Frequently asked questions
Is this a repayment or interest-only mortgage?
This assumes a capital-and-interest repayment mortgage, where each payment clears both interest and part of the loan so the balance reaches zero at the end of the term.
Why does a small rate change matter so much?
On a large balance over 25+ years, even a 1% rate rise adds a significant amount to both the monthly payment and the total interest.