Gail Cunningham of the National Foundation for Credit Counseling provides the following information on FICO scores.

  1. Paying your bills on time — 35 percent of your FICO score.
  2. Ratio of credit available to credit used (using under 30% is good) — 30 percent.
  3. Longevity of credit accounts (longer is good) — 15 percent.
  4. Applications for new credit (fewer is good) — 10 percent.
  5. Using a range of credit, from fixed payments like a house note to open-ended payments like credit cards — 10 percent.