Length of credit history makes up 15% of your FICO score, which sounds modest until you realize how much it weights your overall credit profile. Two consumers with identical recent payment behavior but very different credit ages can score 50 to 100 points apart. Understanding exactly how length-of-history works (and which actions extend or shorten it) is one of the most powerful score-protection skills.
What "Length" Actually Measures
Length of credit history isn't a single metric. FICO and VantageScore each look at three components: the age of your oldest account, the age of your newest account, and the average age of all accounts on your report. The most weight typically falls on the oldest-account age and the average-age-of-accounts figure.
Closing your oldest credit card, even one with a $0 balance and no annual fee, can knock 30 to 80 points off your score over the next 1 to 10 years as the closed account ages off your report (closed accounts in good standing can stay on your report for up to 10 years; after that, they drop off and your length metric resets to whatever's left).
How to Build Length Faster
Once you've got your first tradeline reporting, the only way to "build" length is to wait. There's no shortcut to age. But there are two ways to start the clock earlier than it might otherwise: become an authorized user on a parent's, partner's, or friend's old account that reports authorized users (the entire tradeline history can port over to your file), or open an installment account like a credit-builder loan from Self.Inc: Credit Builder Account (open a Self Credit Builder Account) so you've got both revolving and installment history aging in parallel.
The earlier in life you do this, the more compound benefit you get. Someone who starts at 18 with a single tradeline has a 12-year history at age 30. Someone who starts at 25 has only 5 years.
What Hurts Length the Most
Three actions hurt length disproportionately. First, closing the oldest account. Second, opening many new accounts in a short period — which drags down the average-age-of-accounts metric even when you don't close anything. Third, settling old debts in a way that triggers the lender to "re-age" the account (this is rare but happens with certain charge-off settlements).
A subtler trap: if your oldest account is a store card you barely use, the issuer may close it for inactivity. Set a small recurring autopay on that card (a $9 streaming subscription, for example) to keep it active.
Length vs. Other Score Factors
Length matters, but it's not the most powerful lever. Payment history (35%) and utilization (30%) outrank it. If you're choosing between protecting an old card you don't really use and reducing utilization on the cards you do use, the math favors utilization. The best move is usually to keep the old card open with a small recurring charge — protecting both length and utilization at once.
Key Takeaways
- Length of credit history is 15% of your FICO score.
- Closing your oldest credit card can knock 30 to 80 points off your score over time.
- Authorized-user status on an old, clean account is the only way to inherit length quickly.
- Keep old cards open with a small recurring autopay charge to preserve both length and utilization.
A Note on Reopened Accounts
If you closed an old credit card and now regret it, some issuers will reopen the account if you call within a few months and ask. The original open date often comes back with the account, preserving length-of-history. This isn't guaranteed and varies by issuer — but it's worth a phone call before you accept the score impact of a recent closure.
Related Reading
- Best Credit Cards for Limited Credit History
- Building Credit History as a Green Card Holder
- Credit Score Impact of Closing Accounts: A Clear Guide
- Does Your Credit History from India Transfer to the US?
- First Time Credit Card With No Credit History: Best Options 2026
Frequently Asked Questions
How much does length of credit history affect my score?
Length of credit history is 15% of your FICO score. A 15-year average account age can mean 30 to 80 points more than a 2-year average, all else equal.
Does closing a credit card hurt my credit history length?
Closed accounts in good standing remain on your report for up to 10 years. After they age off, your length-of-history metric can drop sharply. Keeping old cards open is usually the safer move.
How can I extend my credit history quickly?
Becoming an authorized user on a long-running account can transfer that account's age to your file. Otherwise, length of history can only build with time.
Does paying off a loan hurt my credit history?
Briefly. Closing an installment loan can shorten your average account age, but the on-time payment history remains positive on your report. The score impact is usually small and temporary.
