Comment by toss1

Can confirm, having started multiple LLCs and S-Corps.

You get the corporate entity first, and this is required to get the bank account.

So, if the bank account was required to get the corporate entity formed, none would ever be formed, as the bank acct and the corporate authorization would forever be waiting for the other prerequisite to be complete.

And no, AFAICT, there is no hard requirement for a bank account to maintain a corporation, although in practice it would make doing almost everything quite inconvenient.