Mortgage calculator
Estimate UK repayment mortgage costs from the amount borrowed, interest rate and term. See the monthly payment, total interest, payoff time and how overpayments can change the balance.
Inputs
Tip: adjust rate/term to see how interest changes.
How to use this mortgage calculator
Enter the loan amount, not the full property price. Then add the interest rate and term in years. If you plan to overpay, add a monthly overpayment to see an estimated payoff time and total interest impact.
This is useful for rough planning before speaking to a broker or lender.
FAQ
Is this mortgage calculator a lender quote?
No. It is a simple repayment mortgage estimate. Real mortgage offers can include fees, product changes, compounding details and lender-specific rules.
What does overpayment mean?
An overpayment is an extra amount paid each month on top of the normal mortgage payment. In this calculator it reduces the balance immediately, which can shorten the payoff time and reduce interest.
How is the monthly payment calculated?
The calculator uses a standard repayment mortgage amortisation formula with the APR treated as a nominal monthly rate.