Interest a borrower pays to the lender for the duration of the loan.
The add-on interest will be dependent on the nterest rate that you qualify for in the remortgage or mortgage.
Examples of add on interest on a loan of £100,000 for 25 years-
4%- £58351.05
4.5%- £66749.74
5%- £75377.01
5.5- £84226.25
6%- £93290.42
6.5%- £102562.15
7%- £112033.76