For the most part, having a high available credit limit compared to a low balance is much better (Raises your score). There is a lot that goes into a credit score but the main part of it is the ratio of available credit that you have compared to the balance that you have in conjunction to the length of your credit history. For example, you have 5 cards, all totalling....50,000 in credit. Your balance on them is $5,000 so your credit/balance ratio is 10% which means you'll have a pretty good credit score but again, history also goes into it. As far as who a lender will credit to, if someone walked up to me and had a ton of available credit but hardly any balance, I'd first ask him what he needs this for and chances are he's managed his finances very well and is simply looking for a loan that has a lower interest rate than his credit cards are....so he'd be the one I'd most likely give the loan to.