Never close an account because you dont use it. That will hurt you in 2 ways. The ratio of your total balances to your total credit limit makes up 30% of your score. For example if you have 2 credit cards with $5000 limits and you have a $2500 balance on each and also have two unused accounts with $5000 limits then you are using $5000 of your $20000 or more importantly 25% of your total available credit. Now if you close the two unused accounts then you only have $10000 of available credit and still have a total balance of $5000 so you are now using 50% of your total credit limit instead of 25%. This will drastacally hurt your score. Even if you have low balances closing accounts will still hurt your ratio. The other way it can hurt your score is if you close your oldest account. Ill explain how and why in the last paragraph.