Ah, that makes sense, but in practice how do platforms make this clear? Or how do you tell a platform “don’t put this amount into the ISA wrapper, use it for fees”?
I’d prefer the clarity of a separate account, or perhaps better yet, your fees are simply charged separately with an invoice (pay with your credit card) or direct debit (from your bank account).
I can only imagine, based on the screenshots, that for Freetrade we will pay the fees upfront with a card or DD before even getting access to the ISA account, and then the only money you transfer to that account is for investment purposes.