What’s the difference between an overdraft and a credit card?
An overdraft is more of a backup facility that kicks in when you’ve exhausted all of your own funds in the account. The interest on an overdraft starts being calculated the day any transactions are made taking you into overdraft. As soon as your account balance is back in credit, interest stops being charged.
With a credit card, you can spend up to your credit limit and have up to 55 days interest free to pay off your credit card. Interest will start to be charged at the end of the 55 days interest free period.