Can I simply withdraw from my Cash ISA and deposit the money into my Stocks & Shares ISA?

RG2015

JadeHighland said:

I have a Trading 212 cash ISA with £18,000. I also have a Vanguard stocks and shares ISA with £2,000. Both in the current tax year. 

They both style themselves as flexible ISAs. If I withdraw from one, the ISA allowances increases accordingly. 

I think I have too much in cash, as I don't need it for anything urgent. Any issue with me just withdrawing £10,000 from Trading 212 and depositing it into my Vanguard account? 

If you have subscribed £18,000 to Trading 212 and £2,000 to Vanguard this tax year, then that is your full annual subscription used up.

If you withdraw £10,000 from Trading 212, you cannot deposit it to Vanguard even if Vanguard says you still have £18,000 left from your annual allowance.

As others have said, once you have used up your annual allowance any withdrawals can only be returned to the account from which they were withdrawn.