In all the Best Buy Key Posts about mortgage fixed rates, the "after fixed term"/"default"/roll-off rate is often called out quite prominently. Ulster Bank's rates in particular stand-out because their fixed-term rate is the cheapest, while their roll-off rate is nearly the highest. I feel the main reasons we don't see many switchers here are having to involve a solicitor again and lack of understanding around the offers. On the latter it's stuff like how much do I save by switching when taking into account the break-fee, how much will a solicitor charge, what are the pre-requisites (valuation required), when can I break, cut-off days in the month for taking fixed terms, how to value up-front savings (cashback) vs. future savings (lower interest rate) etc. The roll-off rates also have my spider senses tingling that I'm missing something with the likes of the Ulster Bank low fixed rate but high roll-off rate. So my question is what are the implications of the roll-off rates? Is it simply that if you get to the end of the fixed-term and forget to fix/switch again that you'll be paying a high rate? Or is there a risk that you end up locked into that lending institute somehow, perhaps a property crash brings your LTV over 100% and nobody else will take you and you're existing provider will not give you another fixed term. Cheers!