How this works. This calculator is for illustration only and is not a personal recommendation. It assumes your interest rate stays the same for the rest of the term, that interest is charged monthly at one twelfth of the annual rate, that any lump sum is paid now, and that you keep making your current monthly payment plus any regular overpayment. For interest-only mortgages, it assumes you pay the interest due each month plus your overpayment, which reduces the amount you owe at the end of the term. Results are rounded and your lender's figures may differ.

Before you overpay. Many lenders let you overpay up to 10% of your balance each year without a charge, but limits and Early Repayment Charges vary by lender and product, and this calculator does not include them. Check your mortgage offer or speak to your lender first. Overpaying is not right for everyone: it can make sense to keep an emergency fund in place and clear more expensive borrowing first, and money paid into your mortgage may not be easy to get back.

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