See how much you could save

Mortgage overpayment calculator

What are your options?

How much can I overpay on my mortgage?

  • If you’re on a fixed or tracker rate product, you can pay up to 20% of your outstanding balance for each of your sub-accounts before an Early Repayment Charge (ERC) will apply. If you exceed your allowance, you’ll have to pay an ERC on the amount over 20%. To find out what this means for you, log in to Manage your Mortgage and select “Make an Overpayment”.
  • If you’re on our Standard Variable Rate (SVR), there’s no limit to how much you can overpay, and there’s no ERC.

Regular overpayment           

  • This is a regular payment you make every month on top of your monthly direct debit.
  • You must continue to make your normal mortgage payment in full each calendar month.
  • If you pay more than 20% of your outstanding balance, we’ll cancel your regular overpayment so that you don’t pay an ERC.
  • Monthly overpayments will reduce your mortgage balance and could help save you interest.
  • You can set-up, amend, or cancel your regular overpayment by logging in to Manage your Mortgage.

Lump-sum overpayment           

  • This is an additional payment that you can make at any time.
  • You can make lump sum payments as often as you like, but if you exceed your overpayment allowance, you’ll have to pay an ERC on the amount over 20%.   
  • If you pay £1,000 or more, your monthly payment will be recalculated.
  • If you want to pay off your mortgage or you have less than £500 remaining, you’ll need to request a redemption statement by logging in to Manage your Mortgage and selecting the Redemption menu.

Mortgage overpayment calculator

Want to make an overpayment and understand how this could impact your mortgage payments and interest? Pop your details into our simple overpayment calculator and we’ll show you just that. Here are your overpayment options:

Select an option to see how you could save:

A lump sum overpayment can lower your monthly repayments.
Paying a lump sum is a way to lower your monthly payments.
Please enter your mortgage balance

Time Remaining (Years, Months)*

Please enter current interest rate on your mortgage
Please enter extra monthly payments


Please enter lump sum payment
*This information is required.
Your current monthly repayment is

Amount saved each month
Your current monthly repayment is


Important things to remember

If you are not on our Standard Variable Rate (which has no restrictions on the amount you can overpay), there may be a maximum amount you can overpay each year without incurring an Early Repayment Charge. If you need more information on these terms please have a look at your recent mortgage offer, or give us a call on the number below.

To explain how we’ve worked out your potential savings, we’ve made the following assumptions:

  • How much you pay is based on what you’ve told us or your previous monthly payment.
  • You’ll make the same monthly overpayments over the duration of your mortgage term.
  • Your interest rate will not change over your mortgage term.
  • Months are 12 equal lengths so the monthly interest will not change.
  • For display purposes, we’ve rounded up your repayment amount to the nearest £1.
  • The possible reduction in time to repay your mortgage is shown in years and months – this is rounded up or down.
  • If you choose not to log in then your results will be based on the information you’ve given us.
  • Please note if you would like to change the term of your mortgage, a term amendment application form must be completed and an admin fee of £35 must be paid.

Please note this calculator should be used as a guide only. It won’t give you a definite figure of how much interest or time you could save paying back your mortgage. It also doesn’t take into account any charges for early repayments and is based on a capital repayment mortgage only. It doesn’t include all the information you need to compare mortgages, so please ask for a mortgage illustration before choosing a mortgage.

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

Frequently asked questions