The AIB person is mistaken or misunderstood you.Rang AIB and they said if I transfer additional money to mortgage account online I would lose my rate and have to re-fix at the new current Green Mortgage rate of 3.1% so looks like I can't overpay in any way without giving up my rate
As the others here have said:
- Ask them what the Early Repayment Charge (ERC) would be if you made an overpayment by €X
- It will almost certainly be zero in your case
- Once you get that quote for the ERC, you just need to transfer the overpayment amount (€X) from your current account to your mortgage account. You can do it via online banking.