I have a balance of €160 on my aib credit card and today I have been charged a purchase finance charge of €7.44. I phoned AIB and they told me it was charged because I hadn't paid off the bill in total. I thought you were only charged if you didnt pay the minimum they request on your bank statement?? I had more on the card but have been paying €100 off each week?? Does anybody know if this is correct?