Overpayment calculator

Work out how making a one off (lump sum) payment or regular payments would affect your monthly payment or mortgage term. You’ll find all the details you need in your hub or on your mortgage statement.

What happens when I make an overpayment?
We'll automatically reduce your monthly payment if:

  • You make a lump sum payment of £500 or more
  • The balance of your regular overpayments reach £500.

Can I reduce my mortgage term instead?
Yes, but you have to apply to reduce your term. Just follow the link in ‘Next steps’ below.


This calculator is just a guide to give you an idea of what your mortgage payment would be. We’ve made the following assumptions about your mortgage:

  • Calculations are based on a repayment (capital and interest) mortgage
  • Any regular overpayments remain the same for the term of the mortgage
  • Interest is calculated daily and added monthly
  • There is no change in interest rate that would recalculate your monthly payments
  • There are no other changes to your mortgage which may impact your monthly payment such as changes to your fixed rate period, mortgage type, overpayments made during your mortgage term
  • If you have different accounts that make up your mortgage, they must be calculated individually