Free calculator

Overpayment Calculator

See how much interest you could save, and how much sooner you could be mortgage free.

Overpayment Calculator

See how much interest you could save, and how much sooner you could be mortgage free.

Your mortgage

Mortgage balance (£)

What you still owe today, not what you first borrowed.

Interest rate (%)

Time left (years)

Time left (months)

Your overpayment

Extra each month (£)

One off lump sum today (£)

A bonus, inheritance or savings. Leave blank if you're not paying one.

Your savings

Interest saved

£0

Fill in your mortgage details above to see your savings.

Mortgage free sooner

–

New end date

–

How your balance fallsExample

With overpayingWithout

Example only. Add your balance, rate and time left above to see your own figures.

What you pay back in totalExample

Without overpaying£0

With overpaying£0

The maths

Figures are estimates for guidance only and do not constitute financial advice. They assume your rate stays the same for the rest of the term and that you keep paying your normal monthly amount after any lump sum, so the mortgage finishes sooner. Many lenders let you overpay up to 10% of your balance each year without an early repayment charge, but this varies, so check your lender's terms first. Speak to an mbnm adviser for an accurate picture.

How to use it

1
Add your balance, interest rate and time left on your mortgage
2
Pick an extra monthly amount, add a one off lump sum, or both
3
See the interest you save and your new mortgage free date

Check your lender's overpayment allowance first. Many let you overpay up to 10% of your balance a year without an early repayment charge.

Want the real numbers?

A calculator gives you a guide. A free chat with an adviser tells you what lenders will actually offer.

Book a free appointment

Overpayment Calculator