Our mortgage deal (currently 1.54%) ends next year. From what I can see, at that point if we negotiated a new deal, the interest rate would be about 4.3%. The balance will be £22k, which I will have sitting in an ISA, that pays around 4.1%
Part of me thinks it would be best to just repay the mortgage in full when the 1.54% rate ends, since the ISA interest rate is lower than the new mortgage rate, but are there are disadvantages to waving goodbye to that cash, as once it's gone to the mortgage, I can't get it back?