Adjustable-rate mortgages are quite different from fixed ones. If we make a buy to let mortgage comparison of this kind, we'll come to the conclusion that fixed mortgages are the best type. Adjustable buy to let mortgages are not such a good deal due to the fact that rates can increase each year. Therefore, your monthly payments will increase accordingly. In this buy to let mortgage comparison, we have to bear in mind that fixed mortgages do not care about increasing interest rates.
In the buy to let mortgage comparison, it is worth highlighting that fixed ones also have a disadvantage. This drawback within this buy to let mortgage comparison is that, should rates decrease, you'll still be locked to your original one.