Fixed Rate Cash Isa 2025. These accounts are usually opened with a lump sum, and allow no further deposits. Similarly, a loss of interest penalty may be imposed for transferring out a fixed rate isa, as this could be seen as accessing your cash before the term ends.

How much money can i put in a 1. Because you’re saving in cash and getting a guaranteed rate of interest, you can’t lose any money on a fixed rate isa, provided you have less than the fscs limit held with the provider.