If you don’t pay off your monthly credit card statement in full you will have to pay 25% interest until its paid off, not fun. So instead as a fail safe, I created 2 cashapp accounts, 1 attacked to my checking account for my bank, and 1 attached to my credit card.
Instant withdraws typically begin incurring interest immediately, not at the end of the payment period. Otherwise anyone could do this (with or without venmo/cashapp) and never pay interest on their credit card debt.
Better idea: set up a separate account and save enough to cover your credit limit. Then save it for when something comes up and you can’t pay your bill.