We have about 6 years left on a fixed term with KBC. At our current rate of overpayment we'll have overpaid by the maximum permitted by KBC towards the middle of next year.
Assuming that the mortgage has been transferred to BOI by that point, is it safe to assume that, even if BOI won't let us overpay beyond KBC's limit, they must permit us to break any portion of the mortgage we want (paying a break fee if applicable) to overpay that portion?
They can't insist that we either break the entire mortgage or none of it, can they?
Then, is it safe to assume that BOI will / must use the same cost of funds to calculate the break fee that KBC use? i.e. KBC's cost of funds at the time that we fixed? KBC won't tell us what this cost was, so there's not a lot of transparency in this area.