Interest only payment calculator

To find out how making interest only payments will impact your mortgage, please enter your details into our calculator.

How will this impact my mortgage payments?

You’ll be able to find the information we need in Internet Banking or our mobile app.

If you have multiple sub-accounts, you’ll need to enter their details individually and add the payment amounts together. What are sub-accounts?If you’ve made any changes to your mortgage, it could be a mix of different interest rates, terms, and balances. These are known as sub-accounts. Each sub-account has its own individual monthly payment, which we add together to make up your total monthly mortgage payment. You’ll be able to find out if you have sub-accounts in Internet Banking or our mobile app.

You must have at least 6 months left on your current mortgage to apply to switch to interest only payments.

If your interest rate is due to change next month, please use your new rate.

Your monthly payments:

Once your interest only payments have finished, the amount you pay each month will go up.

Your current monthly payment amount:


While making interest only payments, you’ll pay:


After six months of interest only payments, you’ll pay:


Remember to add the details of any sub-accounts individually and add them together to get your total monthly payment.

These figures are for illustrative purposes only.



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  • We use the following assumptions in the calculations:

    • Multiple sub-accounts must be calculated individually.
    • All years are of equal length.
    • Interest is calculated monthly.
    • Estimate of monthly payments are rounded to the nearest pound.
    • There will not be any other changes to your mortgage which would result in a recalculation of your monthly payment.
    • Your interest rate remains unchanged during the 6 months.

Other available support options

We’ve got other options available that could help you stay on top of your mortgage payments.

Other support options

Can’t make your mortgage payments?

We're here to help you figure this out. The sooner you get in touch to let us know, the more options you’ll have.

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You could lose your home if you don’t keep up your mortgage repayments