The length of your credit history accounts for 15 percent of your FICO score. The longer the history, the better for your score.
**What to Do**
Keep your oldest credit card accounts open! Keep your accounts open and active to show you have been a reliable account holder for a long time. You can get a complete overview of your opened accounts by requesting free credit reports from the three main consumer credit reporting agencies (CRAs), which are Equifax, Experian and TransUnion. Remember the CRAs are competitors, and may collect and report different information about you.