Reduce the balance faster
Extra payments reduce the amount on which future interest is charged.
MORTGAGES & MONEY
Mortgage Overpayment Calculator
See how a regular monthly overpayment could reduce mortgage interest and shorten the term.
Estimated time saved—
Enter your details to calculate.
How overpayments can help
Shorten the term
Keeping the normal payment plus an overpayment can repay the mortgage earlier.
Check lender rules
Some mortgages limit penalty-free overpayments or charge early repayment fees.
Frequently asked questions
Does this assume the rate stays fixed?
Yes. The estimate assumes the entered interest rate remains unchanged.
Are overpayments always penalty-free?
No. Check your mortgage terms for allowances and early repayment charges.
Does this change my required monthly payment?
The model keeps the scheduled payment and adds the chosen overpayment.