i was just on to ulster bank, they allow you to pay down a further extra 10% of the remaining loan value each year without incurring a fee. So if have 250,000 outstanding on my mortgage i can pay down a further 25k in that year without incurring a fee.
Get that in writing from them, including a worked example of it. The normal 10% rule is 10% of the monthly repayment amount. You don't want to be subject to a misunderstanding in the future.
So give them the example of
Year 1 250,000 outstanding - customer pays off 10k normally as capital reduction and an extra 25k
Year 2 215,000 outstanding - customer pays off 10k normally as capital reduction and an extra 21.5k
Year 3 183,500 outstanding - customer pays off 10k normally as capital reduction and an extra 18.35k
Year 4 155,150 outstanding - customer pays off 10k normally as capital reduction and an extra 15.5k
Year 5 129,650 outstanding
So at the end of a 4 year fixed term, the balance of the mortgage is now 129,650 with no associated penalties
This sounds very unusual to me ...