How much it counts and how it is measured
Length of credit history makes up roughly 15% of your FICO score. It is not the biggest factor, but it is meaningful, and it is the one that quietly improves on its own every day you keep your accounts.
Scoring models look at a few ages: the age of your oldest account, the age of your newest, and the average age across all your accounts. Each one tells lenders how much experience you have managing credit.
There is no single magic number, but generally the older your accounts, the better. A long track record of responsible use is reassuring to lenders because it shows a pattern, not just a snapshot.
Why older accounts help you
A long history gives scoring models more data to judge, and a long run of on-time payments across years is powerful evidence that you handle credit well. Thin, young files simply have less to show.
This is why your oldest account is a quiet asset even if you rarely use it. It anchors your average age and keeps your oldest-account age climbing, both of which support your score.
It also explains why building credit rewards patience. You cannot buy history or speed it up; you can only start early, stay consistent, and let the years do their work in the background.
How new accounts and closures shift the math
Every time you open a new account, it lowers your average account age, which can nudge your score down a little in the short term. This is normal and temporary, and the new account builds its own history over time.
Closing an old account can hurt in two ways. It can shorten your average age over time, and because a closed card's limit no longer counts, it can also raise your overall utilization. Often the better move is to keep a no-fee card open.
Even closed accounts in good standing can stay on your report for up to ten years and continue to count toward your history during that time. But an open, active account protects your age more reliably than a closed one.
How to protect and grow your history
Keep your oldest accounts open and active. A small recurring charge, like a streaming subscription paid off automatically each month, keeps a card from being closed for inactivity while preserving its age and limit.
Be deliberate about opening new accounts. Each one serves a purpose, but opening several in a short span lowers your average age and stacks up inquiries, so space out applications when you can.
If you are new to credit, the best thing you can do is start a positive account now and protect it. The account you open today becomes the long history that helps you years from now, so time is on your side the moment you begin.
Patience plus the factors you control
Because you cannot speed up time, focus your energy on the factors you do control: pay every bill on time, keep card balances low, and avoid unnecessary applications. Those habits carry far more weight than age alone.
Think of length of history as the reward for doing everything else right, consistently, for a long time. It compounds quietly while you tend to the bigger levers.
The takeaway is simple: start early if you can, protect your oldest accounts, and let consistency plus time build a history that speaks for itself when a lender looks at your file.
You cannot rush time, but you can protect every month you have already earned and keep adding to it. Subefy helps you monitor your accounts across all three bureaus, understand how account age fits your whole profile, and stay on a steady path toward being mortgage-ready. Estimates are educational, results vary, and no specific result is guaranteed.