Credit Age Explained: How the Length of Your Credit History Affects Your Score

Last updated: September 14, 2026

Of the five factors that make up a FICO Score, there’s exactly one you can’t speed up with good behavior, a lump-sum payment, or a clever strategy: credit age. Also called length of credit history, it makes up 15% of your score, and the only way to genuinely increase it is to wait. That makes it one of the most misunderstood factors — and one of the easiest to accidentally damage by closing the wrong account at the wrong time.

This guide explains exactly how credit age is calculated, why closing your oldest credit card can quietly cost you points years later, and what you can actually do to manage this factor strategically.

This article is for general educational purposes only and is not personalized financial or legal advice. Scoring models vary by version and lender; consult a licensed financial advisor for guidance specific to your situation.

What “Credit Age” Actually Means

Credit age, or length of credit history, measures how long you’ve been using credit — and how established your accounts are. It isn’t a single number pulled from one account; it’s a composite drawn from your entire credit file.

According to myFICO’s explanation of what’s in a FICO Score, length of credit history factors in three main things:

• The age of your oldest account — how long ago you opened your very first credit account.
• The age of your newest account — how recently you opened your most recent account.
• The average age of all your accounts — the mean age across your entire credit file, weighted toward accounts you still have open.

myFICO’s own guidance is direct on this: “In general, having a longer credit history is positive for your FICO Scores.” There’s no way around the calendar — this factor rewards patience above everything else.

Why Length of Credit History Carries 15% of Your Score

Approximate weighting used in the general FICO Score model. Exact impact varies by individual credit profile and scoring version.

Lenders read a long, established credit history as a sign of stability. Someone who has managed credit responsibly for fifteen years has demonstrated something a six-month-old file simply can’t: a long track record without major surprises. It’s the same reason a landlord prefers a tenant with five years of on-time rent payments over one with two months of history, even if both are currently paying on time.

How the Average Age Calculation Actually Works

Here’s where a lot of people get tripped up. The “average age of accounts” isn’t just about your oldest card — it’s the average across everything open on your file. That means every new account you open pulls your average down, even if it’s a good financial decision otherwise.

A Simplified Example

Imagine you have three accounts:

• Card A: opened 10 years ago
• Card B: opened 4 years ago
• Card C: opened 6 months ago (new)

Your average account age isn’t 10 years — it’s roughly (10 + 4 + 0.5) ÷ 3 ≈ 4.8 years. A single new account, even a well-managed one, can meaningfully lower your average, especially if your file doesn’t have many accounts yet. This is precisely why opening several new cards in a short window can quietly work against you, even when each individual account is used responsibly.

The Hidden Cost of Closing Your Oldest Credit Card

This is the single most common mistake related to credit age. Say you have an old card with no annual fee that you rarely use anymore. Closing it feels harmless — but here’s what actually happens over time:

• Some scoring models continue to count a closed account’s age in your history for a period of time, but eventually it drops off your report entirely (closed accounts in good standing are removed after up to 10 years).
• Once it drops off, your oldest account becomes whatever is next in line — potentially cutting your credit age by years overnight.
• Your average account age also recalculates without that long-standing account pulling the number up.

The practical rule of thumb: if a card has no annual fee, keeping it open — even with just an occasional small purchase to keep it active — is usually better for your credit age than closing it. For a full breakdown of when closing a card actually makes sense despite this tradeoff, see our guide on whether you should close a credit card you don’t use.

Can Becoming an Authorized User Add to Your Credit Age?

In some cases, yes. If you’re added as an authorized user on someone else’s long-standing, well-managed account, that account’s age can sometimes appear on your own credit report, potentially boosting your average account age and oldest-account date. This is one of the few legitimate ways to influence credit age faster than simply waiting.

That said, it comes with real caveats — not every issuer reports authorized user accounts to the bureaus, and the primary cardholder’s behavior (including any missed payments) can also show up on your file. Our comparison of authorized user vs. joint account holder status covers exactly how much this can help — and where the risk lies.

Common Mistakes That Quietly Shorten Your Credit Age

Mistake 1: Closing the Oldest Card First

When people decide to simplify their wallet, they often close the account they use least — which is frequently also their oldest. If you’re closing cards, consider closing newer ones first and keeping the oldest open.

Mistake 2: Opening Several New Accounts at Once

Whether it’s for a sign-up bonus strategy or simply shopping for a better rate, opening multiple new accounts in a short window drags down your average account age across the board — on top of the separate impact from hard inquiries.

Mistake 3: Letting an Old, Unused Card Get Closed by the Issuer

Card issuers sometimes close inactive accounts automatically after a long period of no use. If you’re intentionally keeping an old card open for its age benefit, an occasional small charge (even something recurring, like a streaming subscription) keeps it active.

Mistake 4: Assuming Credit Age Can Be “Fixed” Quickly

Unlike utilization, which can improve within a single billing cycle, credit age genuinely only moves forward with time. There’s no dispute, payment, or strategy that shortcuts this factor — which makes patience the actual strategy.

Step-by-Step: How to Build Credit Age Strategically

1. Identify Your Oldest Open Account

Pull your credit report and note which account has the earliest open date. That account is quietly doing a lot of work for your score.

2. Keep It Open and Active

If it has no annual fee, keep it open indefinitely. Put a small recurring charge on it and pay it off in full each cycle so it stays active without costing you anything in interest.

3. Be Deliberate About Opening New Accounts

New accounts aren’t bad — they’re often necessary for better rewards or lower rates — but space them out where possible, and understand that each one will temporarily lower your average account age.

4. Consider the Authorized User Route If You’re Just Starting Out

If you’re new to credit and have a trusted family member with a long, clean credit history, ask whether they’d be willing to add you as an authorized user. This is one of the few ways to meaningfully influence credit age from a standing start.

5. Think Twice Before Closing Any Old Account

Before closing a long-standing card, weigh the credit-age impact against whatever is motivating the closure (an annual fee, a rewards downgrade, or general simplification). Often, downgrading a card to a no-fee version of the same product preserves the account’s age while eliminating the cost.

Frequently Asked Questions

Does closing a credit card hurt your credit score?
It can, primarily through two channels: a lower average account age (especially if it’s an old account) and a lower total available credit, which can raise your utilization ratio. The effect is usually larger for older, high-limit cards.

How long does it take to build a good credit age?
There’s no universal number, but many lenders and scoring models consider a credit history of 7+ years well-established. That said, average account age matters continuously, not just at a single milestone.

Does a closed account still count toward my credit age?
Yes, for a period of time. Closed accounts in good standing generally remain on your credit report for up to 10 years, and while some scoring treatments differ, that history typically still contributes to your file until it eventually ages off.

Should I open a new credit card if I’m worried about credit age?
Not necessarily avoid it — just be intentional. A new account can be worth the temporary dip in average age if it serves a real purpose (better rewards, a needed credit limit increase, building credit mix). Just don’t open several at once without reason.

Can I increase my credit age faster than just waiting?
The only meaningful shortcut is being added as an authorized user on someone else’s older, well-managed account, and even that depends on the issuer reporting it to the bureaus.

Related Reading

• What Is a Credit Score and Why It Matters
• Should You Close a Credit Card You Don’t Use?
• How Many Credit Cards Should You Have?
• Authorized User vs. Joint Account Holder
• Credit Mix Explained
• How to Improve Your Credit Score: A Step-by-Step Guide

Conclusion

Credit age is the one FICO Score factor that can’t be rushed, which makes it easy to ignore until a routine decision — closing an old, unused card — quietly costs you points months later. The strategy here isn’t complicated: keep your oldest accounts open and active, be deliberate about opening new ones, and let time do what it does. It’s slow, but it’s also the most predictable factor on your entire credit report.

About this guide: written by the NeoDRXT editorial team based on publicly available data from myFICO. This content is educational and does not constitute financial or legal advice — consult a licensed financial advisor or credit counselor for guidance specific to your situation.

Written by Daniel Sánchez

Daniel Sánchez is the creator and editor of NeoDRXT.com. He doesn't work in the financial industry, but he's spent years digging into how credit cards, rewards programs and interest calculations actually work, and started this site to explain it in plain language. Every article begins with research into card issuers' actual terms and public sources such as the U.S. Consumer Financial Protection Bureau (CFPB), before being written up as a practical, no-nonsense guide. He is not a financial advisor, and nothing on this site should be taken as personalized financial advice — for decisions specific to your situation, always consult a licensed financial advisor or your card issuer directly.