Q: I own more than one credit cards and found difficulty when managing them all, especially remember their due date, should I close one with balance is zero?
A: No, you should NOT close any credit card even the balance is 0. 30% of your credit score (FICO or TransUnion score) is calculated base on the ratio between balance and credit limit. Maintaining a low balance while having a high credit limit (sum up from all of your individual credit card/line limit) give you a better FICO (i.e. at good level of > 700). Once you closing your credit card, you subtract its limit out of your total credit limits in bureau’s report and hurt your score seriously. I’ve learnt this the hard way.