What Determines Your Credit Score?

The New York Times had a recent article about credit scoring. Your credit score is a score that is determined by a company called Fair Issacs. The exact algorithm is a closely guarded secret but its a good indicator of your credit worthiness.

¶ 35 percent is determined by your payment history. Do you regularly pay your bills or fines on time to any creditor that submits your information to the credit bureau? Even unpaid library fines, medical bills or parking tickets may appear here.

¶ 30 percent is based on the amounts you owe each of your creditors, and how that compares with the total credit available to you or the total loan amount you took out. If you’re maxing out your credit cards, your score may suffer.

¶ 15 percent is based on the length of your credit history, both how long you’ve had each account and how long it’s been since you had any activity on those accounts. The fewer and older the accounts, the better (assuming you’ve made timely payments).

¶ 10 percent is based on how many accounts you’ve recently opened compared with the total number of your accounts, as well as the number of recent inquiries on your report made by lenders to whom you’ve applied for credit. Your score can drop if it looks as if you’re seeking several new sources of credit — a sign that you may be in financial trouble. (If a lender initiates an inquiry about your credit report without your knowledge, though, it should not affect your score.) Shopping around for an auto loan or mortgage shouldn’t hurt, if you keep your search to six weeks or less. But every inquiry you trigger when you apply for a credit card can affect your score, says Craig Watts, a spokesman for Fair Isaac. So be selective.

¶ The final 10 percent is determined by the types of credit used. Having installment debt — like a mortgage, in which you pay a fixed amount each month — demonstrates that you can manage a large loan. But how you handle revolving debt, like credit cards, tends to carry more weight since it’s seen as more predictive of future behavior. (You can pay off the balance each month or just the minimum, for example, charge to the limit of your cards or rarely use them.)

For the best rates on a loan or credit card, you want a score that’s above 700, at least. To achieve that, make sure to pay all your bills on time. It’s also a good idea to have at least one credit card you plan to use for a long time, but not too many. Keep a low balance — generally less than one-third of your total credit limit. Of course, it’s best to pay off your balance entirely each month. And stay on top of the information in your reports.

From what I've heard over the years, you should ideally have 4 lines of credit (credit cards, store cards or other loans) with less than 50% utilization for a better score. Also if you've had a credit card for years that you don't use and doesn't have a balance on it, don't close it. It just might lower your score. (Of course if you signed up for a gazillion cards in college and can't keep track of them, by all means close a few).