Your credit score is a three digit number, but the age of your accounts is the story behind it. Length of credit history accounts for 15% of your FICO score and a similar chunk in VantageScore. It measures how long you have been using credit, and lenders use it to gauge your experience and stability. The longer your track record of on time payments, the more reliable you look. A short history makes you a question mark, even if your payment record is perfect.
What Goes Into the Length of Credit History Metric
Credit scoring models break this factor into three subcomponents. The age of your oldest account tells lenders when you first started borrowing. The average age of all your open and closed accounts creates a blended view of your tenure. And the age of your newest account signals how recently you took on fresh debt. FICO looks at all three, but it cares most about the average age and the oldest account. VantageScore places more weight on the average age of open accounts. In both cases, a difference of a few years can shift your score by 20 to 30 points depending on the rest of your profile.
Closed accounts do not disappear immediately. FICO continues to include them in your average age for up to 10 years after closure. That means closing an old card today will not wreck your score tomorrow, but it will slowly erode your average as the closed account ages out of the calculation. VantageScore takes a similar approach but may exclude closed accounts sooner. The key number to watch is the average age of your open accounts. That is the number lenders see when they pull your report.
Why Lenders Care About the Age of Your Credit
Lenders use the length of credit history as a proxy for experience. A person who has managed a credit card for 15 years has shown they can handle a revolving line through different economic cycles. A person with only two years of history has less data to judge. This is not about fairness. It is about statistical probability. Borrowers with longer histories default at lower rates, all else equal. That is why the scoring models reward time in the game.
The impact is most visible when you are young or new to credit. A thin file with a single account less than two years old caps your score around the mid 600s, even if you never miss a payment. The only fix is patience. You cannot accelerate time. But you can avoid actions that reset the clock, like closing your oldest card or opening several new accounts in a short window.
Strategies to Improve or Preserve Your Credit Length
Start by keeping your oldest revolving account open. That includes credit cards, charge cards, and lines of credit. Even if you have moved on to a better card with higher rewards, keep the old one open. Use it once every three to six months for a small purchase and pay it off immediately. That prevents the issuer from closing the account due to inactivity. The card may have a low limit or no perks, but its age is more valuable than any sign up bonus.
If you have a thin file, consider becoming an authorized user on a family member’s older card. The account history will appear on your credit report, boosting your average age immediately. This works best when the primary cardholder has flawless payment and low utilization. Not every issuer reports authorized users to the bureaus, so check first. And be aware that removing yourself later will erase that history from your score.
Another tactic is to keep your oldest installment loans, like a student loan or auto loan, on your report even after you pay them off. Closed installment accounts stay on your report for up to 10 years and continue to count in your average age. Do not rush to remove them. Let the history accumulate naturally.
Avoid opening too many new accounts at once. Each new account pulls down your average age. If you need to apply for multiple cards or loans, space them out by at least six months. Your score will take a temporary hit from the inquiries and the lower average age, but it will recover as the new accounts season.
Common Mistakes That Hurt Your Credit History Length
The biggest mistake is closing your oldest credit card because you think it simplifies your wallet or because you want to avoid an annual fee. If the card has an annual fee, call the issuer to ask for a product change to a no fee version. That keeps the account open and preserves its history. If they refuse, weigh the fee against the score benefit. For most people, paying a small annual fee is worth keeping a 10 year old card. If the fee is high, close it only after you are sure the score drop will not affect a pending application.
Another mistake is assuming that old closed accounts no longer help. As mentioned, they stay in your score for years. But if you have a thin file and your oldest closed account is about to fall off your report, you need to build a new base. That is when you open a new card or become an authorized user to start a new aging clock before the old one expires.
Mixing credit types can also affect the average age indirectly. If you have only credit cards and you open a new auto loan, that loan will be the youngest account on your report, dragging down the average. That is not a reason to avoid an auto loan, but it is a reason to keep your cards open so the average stays as high as possible.
How to Monitor Your Credit History Length
You can see the average age of your accounts on the credit report itself. Each bureau lists the date opened for every account. Add up the ages in years, divide by the number of accounts, and you get the average. For closed accounts, use the date closed as the end point. Most free credit monitoring services also show your average age and oldest account. Check it every six months to track the trend.
Your goal is to keep the average age climbing year over year. If you open a new account, the average will drop temporarily, but it will recover as the new account ages. As long as you keep opening accounts slowly and never close your oldest, the trend is upward. A downward trend signals that you are closing old accounts faster than new ones are aging. That is a red flag for your score.
For borrowers with excellent credit, the length factor is often the difference between a low 800 and a high 800. Once you have a long history, the scoring model gives you full points for this category. That usually requires an average age of seven to ten years and an oldest account of at least 15 to 20 years. Beyond that, there is no extra benefit. You can stop worrying about it and focus on payment history and utilization.
The real risk is closing your oldest card. Keep it open, even if you do not use it. That card carries the weight of your entire credit lifetime. Lose it and you lose years of history.
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