If you check your statement when it arrives, it should advise you clearly of your payment date, and I believe most adhere to the policy of showing you different 'last day' for payments for your chosen method - cash / post / cheque / bank deposit etc. Stick to the date, and you won't get stung. remember though, pay the lot off, if you pay �199 one month, you'll still acrue interest on the �200 you owe - that's how they make their money. When (and it's not if, it's when!) they offer to quadruple your limit, say no!