Please note your home may be repossessed if you do not keep up repayments on your mortgage.

Mortgage overpayment calculator

The purpose of this calculator is to give you an idea what difference increasing your monthly payment can make to your mortgage term and the interest you’ll pay.

This calculator is not intended to promote any of the Society’s products.


hint: whole numbers & no commas


hint: 5.5 or 6 without %

Please check for errors
Payments and Interest Saved for a Repayment Mortgage:
Yrs Months

This may change if the interest rate payable on your mortgage changes in the future.