I have an MBNA card with a zero balance and I've formed the habit of using it to buy petrol, then paying it off when the statement is created.
Just to keep the card ticking over.
So, by paying it off in full every month I'd expect to accrue no interest, however I regularly get charged about 65p interest each month.
I only need to buy a tank of fuel once per month and it's about £65, so it looks like I'm being charged 1% interest for some reason.
Any ideas why I'm being charged this?
I couldn't find the answer on the app, and after a long hold time in the phone to them waiting to get through I gave up.