You share a link. Someone buys the thing. Simple, right? Except sometimes you get the commission and sometimes you don't — and the difference usually comes down to two things you can't see: a tiny tracking file called a cookie, and the clock attached to it. Understanding the affiliate cookie window is one of the most useful things you can learn as an affiliate, because it explains why some of your sales pay out and others quietly vanish.
Let's break down how affiliate cookies actually work, what a cookie window is, and the real durations of the programs you're most likely to use — including the Amazon rule almost everyone gets wrong.
What an affiliate cookie actually is
When someone clicks your affiliate link, the program drops a small tracking cookie in that person's browser. That cookie carries your ID. If the shopper buys something before the cookie expires, the sale gets attributed to you — that's the word the industry uses for "credited." The cookie is the paper trail connecting a click you drove to a sale you earn on.
The flip side matters just as much: no cookie, or an expired cookie, means no commission. If someone sees your recommendation, closes the tab, and buys three weeks later by typing the store name directly into their browser, there's usually nothing tying that purchase back to you. The cookie is the whole game.
What a cookie window means
The cookie window — also called the attribution window, or on some networks the "return days" or "tracking gap" — is simply how long that cookie stays valid. It's the countdown between the click and the purchase during which a sale still counts for you.
Click today, buy tomorrow, and a 30-day window still has you covered. Buy 45 days later on that same 30-day window and you've missed it — the cookie expired, and the sale is no longer yours. Different programs set wildly different windows, which is exactly why you should know the number before you promote something.
Last-click attribution: why timing beats duration
Here's the part most guides gloss over, and it's the most important thing on this page. Most affiliate networks use last-click attribution. That means the most recent affiliate link a shopper clicked before checkout wins the commission — not the first, and not the one with the longest cookie.
So imagine you post a link and the shopper clicks it. Your cookie is live and has 29 days left. Then, two days later, that same shopper clicks a different creator's link for the same product and buys an hour after that. The later click overwrites your cookie. You get nothing, even though your cookie was technically still "valid."
This is why a long cookie window doesn't protect you the way people assume. Duration keeps you in the running; being the last click is what actually pays. Engineering your link to be the final one a shopper touches before buying is often more valuable than chasing programs with the longest windows.
Amazon Associates: the big exception (and the 90-day myth)
Amazon runs the shortest window you'll deal with regularly, and it's the source of endless confusion. Per Amazon's Associates Program Operating Agreement, a tracking session lasts 24 hours from the click. If the shopper buys within that 24-hour window, you earn. If they wait 26 hours, you don't.
There's one extension. If the customer adds a qualifying item to their Amazon cart within that 24-hour window, the commission still counts when they eventually check out — as long as they complete the order for that item within 89 days of the original click. That's the real rule, and it comes straight from Amazon's Operating Agreement.
And here's the myth to bury: Amazon does not have a 90-day cookie. You'll read that everywhere and it's wrong. There is no standalone 90-day click cookie. The only way you get anywhere near that long on Amazon is the cart exception — the item has to be sitting in the cart, added during your original 24-hour window, and checked out within 89 days. No cart-add, no extension.
Amazon's session also ends early in two cases: the customer places an order, or they re-enter Amazon through a different Associate's link. That second one is last-click attribution in action — a fresher Amazon link overwrites yours instantly.
Typical windows on the major networks
Outside Amazon, one thing is true almost everywhere: the cookie duration is set by the individual merchant or advertiser, not fixed by the network. Many blogs list "one number per network" as if it's a law. It isn't. Here's the honest picture, as of 2026:
- ShareASale — each merchant sets its own duration, which ShareASale calls the "tracking gap." ShareASale describes 30 days as the network standard, and it's the common default, but individual merchants can and do change it.
- CJ Affiliate — set per advertiser under each program's terms. Durations vary widely from program to program; many run 30 days or longer. Check the specific program to be sure.
- Rakuten Advertising — the cookie life (Rakuten's "Return Days") is set per advertiser, either as a program default or at the individual offer level, so it varies by merchant. Look at the offer's terms for the exact number.
- impact.com — its underlying tracking cookies can live up to 365 days, but that's the cookie's technical lifespan, not a promise you'll be credited for a full year. The commissionable attribution window is configured per brand, so the number that actually pays you is set by whichever advertiser you're promoting.
Across the wider industry, cookie durations commonly fall somewhere between about 7 and 90 days, with 30 days widely treated as a standard. When in doubt, check the specific program's terms rather than trusting a network-wide generalization.
Why cookie length matters for your earnings
Window length should shape what you promote and how. A longer window suits high-consideration, big-ticket purchases — the kind people research for weeks before pulling the trigger. Give a slow decision more time to convert and you'll catch sales a short window would lose.
A short window like Amazon's 24 hours rewards the opposite: immediate buying intent. Amazon links tend to pay best when you catch someone already in "buy it now" mode, which is why urgency and timing matter so much there.
Practical timing tips for creators
- Publish when intent is high. Promote near paydays, launches, sales events, or the moment your audience is actively shopping — not weeks ahead.
- Drive urgency on Amazon. With a 24-hour window, "here's the one I use, grab it now" tends to outperform slow-burn content.
- Match big-ticket items to longer-cookie programs. Expensive, research-heavy gear often converts better under 30-day-plus windows than under a one-day clock.
- Re-share to become the last click. Since last-click wins, refreshing and re-posting your link close to a shopper's decision beats relying on an old cookie.
- Keep destinations current. A dead or redirected link never earns. Point people at pages that still exist and still sell.
How MakerManifest helps you work the window
Knowing the windows is one thing; comparing them across programs is another. The Affiliate Program Directory lists thousands of programs from CJ Affiliate, ShareASale, Impact, AWIN, AvantLink and Rakuten — searchable, with commission ranges, cookie durations, and apply links — so you can size up a program's window before you promote it.
Because last-click attribution rewards being the final touch, it helps to keep your links live and editable. Every link on MakerManifest gets a branded mkr.ms short link with click tracking, and you can change where it points later without breaking the URL you already shared — so an out-of-stock product or a broken program link never costs you a would-be commission. Automatic affiliate tag injection across 50+ stores keeps your tags applied so you're never the click that tracked to nobody, your profile and bio links keep all your product lists in one place, and analytics show you what's actually earning.
One non-negotiable: always disclose. Affiliate links require clear, honest disclosure to your audience — no exceptions, no matter how the cookie shakes out.
Understand the window, engineer your click to land last, and pick programs whose durations fit what you're promoting. Start free — sign up here and build your first product list today.