Mortgage repayment calculator

How much could overpaying save you?

Enter your mortgage details to see your monthly payment and the total interest you'll pay. Then add a lump sum or a regular top-up and watch your mortgage-free date move.

Your mortgage

Already paying one? Enter today's balance, this month as the start date and the time you have left.

£
%
Start date
When the mortgage began. Your first payment is the month after.
Mortgage term
years
months
Regular overpayment
£
From
Until
Work out the amount for me Pick a balance to reach and a date, and we'll tell you how much to overpay. Leave the balance at £0 to be mortgage-free by then.
£
By
One-off overpayments

A bonus, an inheritance, savings from a matured fixed-rate account. Add as many as you like.

When you overpay

Monthly payment £0
Total interest £0
Interest saved £0
Mortgage-free  

Balance left to pay

How your balance falls over the term

  • With overpayments
  • Without overpayments

Year by year

Totals for each calendar year, with your overpayments included. Select a year to see its months.

Year Payments Overpayments Interest Capital End balance

These figures are an illustration, not financial advice or a quote. We assume a repayment (capital and interest) mortgage at a fixed rate for the whole term, with interest worked out monthly. Most UK lenders calculate interest daily and your rate will likely change when a fixed or tracker deal ends, so your actual payments will differ. Check your mortgage terms for early repayment charges before you overpay.