If you can keep them open, but only use a small percentage of the limit available, it will help your credit score. Let’s say you have a credit limit of $10, 000, and never charge more than $500, your percentage of use is only 5% and will be considered a good ratio. Also, always pay your cards in full every month or don’t use them. Closing them will definitely lower your score, but if you know yourself and can’t resist getting back into debt, you are still better off closing them.