What if interest rates change?

Worried about an interest rate rise? Use our online 'What if interest rates change?' mortgage repayment calculator to work out the effect of an interest rate rise or interest rate fall and what your new monthly mortgage repayment might be. Use the 'What if interest rates change?' calculator and then our mortgage comparison tool to search for the right mortgage. Simply fill in the fields below, press calculate and let our interest rate calculator tell you what your repayments will be if interest rates go up or down.