Rate Change Calculator

You can use this calculator to get an idea of how an interest rate change could affect your monthly mortgage payments.

Simply fill in your mortgage details below and select ‘calculate’ to reveal the interest rate slider. You can then adjust this to see how an increase or decrease would change your monthly payments. You can find information about your mortgage in your Annual Mortgage Statement, or by logging into your Internet Banking account if you have one.

See how a rate change could affect your mortgage

Your outstanding mortgage balance


Your repayment type

Your remaining term

Your current mortgage interest rate


Your monthly repayments could be more

Your monthly repayments could be less


Change of 0%

Change of 5%

Move the slider to see how base rate changes could affect your monthly mortgage payments.

This calculator provides an indication of the possible change in your monthly mortgage payments in the event of an interest rate change. All figures are indicative and for illustrative purposes only.

There is a limit to how low your interest rate can be if you're on a Nationwide tracker mortgage. Find out more about tracker floor.

Interest only mortgages

If you repay all or part of your mortgage on an interest only basis, your monthly payments only pay the interest due and don’t go towards reducing the amount you borrowed. So it’s important you have plans in place and regularly check they’re on track to repay the full amount by the end date of the mortgage.

Mortgages are secured on your home. You could lose your home if you do not keep up payments on your mortgage.

Mortgages are subject to underwriting and criteria. Minimum age 18, UK residents only.