Credit Age: Why Your Oldest Account Matters
Length of credit history is 15% of your FICO score. It rewards you simply for having old accounts — and punishes you for closing them. Here's the full picture.
What FICO actually measures
The "length of credit history" factor combines three separate signals:
- 1.Age of your oldest account — the longer, the better.
- 2.Average age of all accounts — opening new accounts lowers this.
- 3.Age of your newest account — recent openings signal potential risk.
The closed account myth
Many people believe that closing a credit card removes the negative history and "cleans up" their report. This is backwards.
Closed accounts with positive history stay on your report for 10 years. They continue to count toward your average age. What you lose when you close an account is the future — the account stops aging and eventually falls off entirely.
Closing your oldest account doesn't hurt you the day you close it. It hurts you 7–10 years later when that history disappears and your oldest account suddenly becomes much younger.
What happens when you open a new account
Every new account drags down your average account age immediately. If you have three accounts averaging 4 years old and open a new one, your average drops to 3 years.
This is why opening multiple cards in the same year can suppress your score for 12–24 months, even if everything else is perfect. The accounts need time to "season."
How to protect your credit age
- ✓Never close your oldest account, especially if it has no annual fee. The cost of keeping it is zero.
- ✓Keep old cards active with a small recurring charge (a $5 subscription works) on autopay. Issuers can close inactive accounts after 12–24 months.
- ✓Downgrade, don't close annual fee cards you no longer want. Call the issuer and ask for a no-fee product change — the account number stays the same.
- ✓Space out new applications by at least 6 months when possible, to minimize average age dilution.
The patient investor analogy
Credit age rewards the same quality as compound interest: time in the market beats timing the market. You don't need to do anything clever. You just need to not undo the work time is doing for you.
A 25-year-old who opened their first card at 18 and never closed it has 7 years of aging — a genuine asset that cannot be fast-tracked.