1. How you pay your bills (35 percent of the score)
The most important factor is how you've paid your bills in the past, placing the most emphasis on recent activity. Paying all your bills on time is good. Paying them late on a consistent basis is bad. Having accounts that were sent to collections is worse. Declaring bankruptcy is worst.
2. Amount of money you owe and the amount of available credit (30 percent)
The second most important area is your outstanding debt -- how much money you owe on credit cards, car loans, mortgages, home equity lines, etc. Also considered is the total amount of credit you have available. If you have 10 credit cards that each have $10,000 credit limits, that's $100,000 of available credit. Statistically, people who have a lot of credit available tend to use it, which makes them a less attractive credit risk.
3. Length of credit history (15 percent)
The third factor is the length of your credit history. The longer you've had credit -- particularly if it's with the same credit issuers -- the more points you get.
4. Mix of credit (10 percent)
The best scores will have a mix of both revolving credit, such as credit cards, and installment credit, such as mortgages and car loans.
5. New credit applications (10 percent)
The final category is your interest in new credit -- how many credit applications you're filling out. The model compensates for people who are rate shopping for the best mortgage or car loan rates.