Of the options offered, that does seem like the best offer there. However, read your contract and check what is there. Does it specify a tracker rate that you would go onto after the fixed period is up or does it leave the tracker rate offered at PTSBs discretion? As for negotiating a lower rate - certainly it is always worth trying to get the best rate. The question is what negotiating point can you offer, is there a better rate that you can avail of than the one they are offering?