If you prefer to make safer decisions about your investments, you may be better off choosing a fixed rate ISA. When you have a fixed rate your interest isn’t based on the current market. It’s simply set at a certain rate and will remain there until your ISA matures. But, once the account has matured your rates will become much lower.

If you don’t follow the state of the economy, a variable rate can prove to be some what of a gamble. A variable rate ISA may start out with a good rate, but it can drop every time the economy weakens. You interest rate could literally change from good to bad overnight.

The big advantage of a variable rate ISA is that not only can your interest rate drop, it can also raise. So, while there’s a chance that you might get a bad rate, there’s also the chance that you can get the best ISA rates on your savings. The best choice for you really depends on whether you want to earn a steady rate or you’d prefer to earn a higher rate.