If i use my full allowance for an isa in financial year what happens in next financial year

Hi stbar3, and welcome to the forum.

You get a new annual ISA allowance each tax year.

Hi,

Just to add - your existing ISA continues with its tax free status and you can transfer the ISA to an alternative provider to get a better rate if one is offered.

The new allowance for the new tax year may be different to the allowance from the previous tax year, so it's best to check what the maximum contribution is for each new tax year.

Just remember you can only contribute money to 1 cash ISA and 1 investment ISA per tax year or else the second ISA will lose its tax privileged status.