Mortgage Repayment Calculator
Estimate your monthly mortgage payment, the total you'll repay over the term and how much of that is interest. Enter your loan amount, interest rate and term in years.
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Assumes a fixed annual interest rate compounded monthly. Real mortgages may include fees, variable rates and overpayments that change the outcome.
Frequently asked questions
Is this for repayment or interest-only mortgages?
This calculator assumes a standard repayment mortgage where each monthly payment covers both interest and capital. Interest-only mortgages have a different structure where you only pay interest each month and repay the principal at the end.
How does the interest rate affect the total cost?
Even a small change in rate makes a big difference over 25 years. For example on a £250,000 loan, going from 4.5% to 5% adds roughly £75 to the monthly payment and about £22,000 to total interest.
Should I take a longer term to lower monthly payments?
Longer terms reduce the monthly payment but increase total interest paid. A 30-year term instead of 25 typically costs tens of thousands more over the full life of the loan.