People assume tradelines are permanent — that once you’re added as an authorized user, that account lives on your report forever. Usually that’s not how it works. So how long do tradelines stay on your credit? For the purchased, authorized-user kind, the honest answer is about two months: you’re added before the statement closes, the account reports to the bureaus for roughly two billing cycles, and then you’re removed and it drops off not long after. Understanding that timeline is probably the single most important thing buyers don’t know going in.
The standard product: two cycles
When you buy a tradeline through a broker, the standard product is two billing cycles — roughly two months (buying directly from me, I keep the authorized user on for three months — more on that below). The seller adds you as an authorized user before the statement closes so it posts, the account shows on your report through the next cycles, and after the product period the seller removes you. Within a month or two of removal, the tradeline drops off your report entirely.
Some brokers offer a one-month extension for an extra fee if you need more time — say, a loan application that keeps getting pushed back. (On my own cards I keep the authorized user on for three months — longer than the two-cycle broker minimum. It gives buyers more cushion, and rapidly adding then removing authorized users is the kind of pattern that makes a card issuer’s fraud team suspicious.) But the baseline assumption when you’re shopping is two months on, then gone. I’m clear about this with buyers because some expect a permanent boost, and that’s just not the structure. You’re renting a credit history for a few months, not acquiring it. What matters is what you do with that window.
What your score does during and after
While the tradeline is reporting, your score reflects the account’s full profile — its credit limit, how long it’s been open, its utilization. For a thin file (few accounts, low limits, short history), a well-chosen tradeline can move the number meaningfully during that reporting window. When it drops off, your score typically settles back to roughly where it started — sometimes a touch higher if you’ve built other history in the meantime, sometimes back to baseline. The increase from a tradeline is not permanent, and I’d rather say that plainly than have a buyer feel misled after the tradeline comes off.
That’s why the right use of a tradeline is strategic: you time it to a specific credit pull. Here’s the way I coach buyers through it. Say you’re getting a mortgage and the lender pulls in early March. You don’t want the tradeline bought in December — it’ll have fallen off by then. You want it added so it’s actively reporting in late February and through the pull. Buying too far ahead, or after the pull already happened, accomplishes basically nothing. Line the reporting window up with the moment someone is actually looking at your file.
The Amex exception (buyers get burned by this)
American Express changed how it reports authorized users around February 2015. Before that, Amex reported AUs with the card’s original open date — so a 20-year-old Amex would make you look like you’d held that account for 20 years. After 2015, Amex reports the date the AU was added as the open date. So that same 20-year-old card now posts to your report as a brand-new account.
I had a buyer pay for an Amex tradeline elsewhere — a card with serious age — and get almost nothing from it, because the age benefit was simply gone. (I refunded him when I found out, but that’s cold comfort when your loan timeline is already tight.) I don’t sell Amex tradelines for this reason. The limit might be fine, but if age is the point, Amex is the wrong issuer. Chase, Capital One, Barclays, and US Bank still report the original open date for authorized users — that’s where the age benefit is real, and it’s the kind of authorized user tradeline worth buying.
When tradelines on your own accounts stay for years
If your question is about tradelines on your own accounts — not AU tradelines you purchased — the answer is completely different. Open accounts in good standing stay on your report as long as the account is open. Per the CFPB, negative information can generally be reported for up to seven years (bankruptcies up to ten), while positive payment history can stay even longer — closed accounts in good standing commonly remain for about ten years.
This is exactly why closing old cards isn’t always smart — you can strip years of positive history off your average account age. An old card with no balance and no annual fee is usually worth keeping open just for the age it quietly contributes to your file. It’s the opposite problem from a purchased tradeline: here the history is yours and it sticks, so don’t throw it away.
What actually sticks long-term
The purchased tradeline itself doesn’t stick — but the score lift during the reporting window can be put to work. A buyer who uses a tradeline to clear 700, gets approved for a card with a real limit, and then keeps that card in good standing has done something lasting. The tradeline did its job as a bridge: it got them through a door they then keep open on their own. That new account ages on their report for years, and the borrowed history that opened it is long gone and irrelevant.
Common questions
Most purchased authorized-user tradelines report for about two billing cycles — roughly two months — and then the seller removes you. The account drops off your report within a month or two after that. Some brokers sell a paid one-month extension.
Usually it settles back to roughly where it was before the tradeline posted. The lift isn’t permanent. If you used the window to open and keep your own account in good standing, that new history can hold the gain after the tradeline is gone.
Your own accounts, yes — open accounts in good standing report as long as they’re open, and closed positive accounts often stay about ten years. Purchased authorized-user tradelines are the temporary kind; they’re designed to come off.
That’s the realistic way to think about it: a short rental of credit history that ideally gets you through a door you then keep open yourself. If you want to see what that looks like in practice, I keep tradelines for sale on this site — cards with real age, high limits, and low utilization, from issuers that still report the original open date. The tradelines FAQ covers the mechanics in more detail if you want to go deeper before deciding.
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