Even in 40% bracket it needs to be declared as income and could see you lose your personal allowance. It's a grey area I'm chancing by not declaring interest but reckon they'll give me a call soon enough.
Just read up on it. So you pay the same rate on your savings interest as your bracket.
Tax on savings interest
You do not pay tax on your savings interest if you're on a low income.
www.gov.uk
Knew this was too good to be true. 4% rates pretty much cut down to 2.4%… had been expecting it to be the same 20% as investments.
It also says there that you don’t have to do self assessment unless it’s over 10k. No idea how you declare otherwise. Guess I’ll let the bank sort it out