Hi Michelle
I am a bit confused here. Could you give us some numbers as it would make it much easier to understand.
Are you saying that you can sell your home for, say, €300k and buy a bigger one for less - say €250k?
How much is actually left on your mortgage? If the mortgage is €100,000; you are paying 2% less as it's a tracker. That is a saving of €2k a year. But this will reduce as you are repaying the capital. On the other hand, it might increase if AIB increases their SVR. If the mortgage is €300k, you would be paying an extra €6,000 a year.
My gut feeling is that you should stay in the house you like with a cheap tracker mortgage for as long as possible. When you have to move, in say 3 years, you will have even more equity as you will have paid off more capital (assuming prices don't fall by more than the capital you repay). As there will be only 11 years left on the tracker, you won't be giving up that much.
It is possible that AIB might do a deal on trackers at some stage. So by waiting, you are giving yourself a chance to gain from any such deal.
Brendan