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Mortgage Charter support calculator

Our Mortgage Charter calculator gives you an idea of what your monthly mortgage payments might look like if you were to apply to extend your mortgage term or switch to interest only payments for six months.

You can find the information you need to complete the calculator by logging into the Mortgage Portal  open_in_new. You can also find this information on your most recent mortgage statement.

Before making any changes

It's important you read through all the information about the support available under the Mortgage Charter and take the time you need to think about what feels right for you. Extending your mortgage term or temporarily changing to interest only payments, increases the amount of interest you pay over the term of your mortgage. You should continue to pay your current monthly mortgage payments if you can afford to.

Please note that this calculator is for guidance only. All figures provided are approximate.

The Mortgage Charter gives the option of either extending your mortgage term or temporarily switching to interest only payments for six months. You'll need to complete all fields in the calculator to enable you to compare the monthly mortgage payments for both of these options.

This is the amount of time left on your mortgage overall, not the length left on your current product.

Your mortgage term cannot go beyond your retirement age or take you past 75, whichever comes earliest.

  • Current payments
  • Monthly payments
  • Monthly payments after 6 months n/a
  • Total cost over term
  • Term Years, Months
  • If you extend your mortgage term
  • Monthly payments
  • Monthly payments after 6 months n/a
  • Total cost over term
  • Term Years, Months

    • By extending your mortgage term, you'll lower your monthly payment as you’ll be paying your mortgage balance over a longer period. Doing this means your mortgage will cost more over the full term, because you’ll be paying interest for longer.

    In the first six months, you can move back to your original mortgage term without any affordability checks. If you decide to do it after the six months, the change will be subject to affordability checks. By changing back to your original mortgage term your monthly payments will be higher than they were before you extended the term.

  • If you change to interest only for six months
  • Monthly payments
  • Monthly payments after 6 months
  • Total cost over term
  • Term Years, Months

    • By changing to interest only payments, you'll lower your monthly payment for six months. During this time, your overall balance won’t reduce and you’ll therefore pay more interest over the remaining term of the mortgage.

    After the six months, your payments will go back up to make sure your mortgage balance is repaid in full at the end of your mortgage term. Your monthly payments will be higher than before you switched. This is because you’ll be paying back the same balance over a shorter period.

Apply for Mortgage Charter support

You can complete our online form to apply for a term extension or to change your payments to interest only for six months.

Please note, under the Mortgage Charter, you can only select one of these options. You must also be up to date with your current mortgage payments.

If you've already missed a mortgage payment, the mortgage charter won't be suitable for you, but there are other ways we can help. You can read more about the support we provide on our payment difficulties page. Or if you're ready to chat, give us a call on 0800 083 8031. We're available 8:30am to 5:00pm Monday to Friday.


Apply online

This calculator provides an estimate only and does not take into consideration any overpayment restrictions or Early Repayment Charges. It also assumes that there are no other changes during the duration of the mortgage term stated i.e. changes to interest rates or your product.

Please contact us to discuss your requirements in more detail.