Cookie windows explained: why the same click pays differently across networks

Ask ten affiliates what a "cookie window" is and you'll get ten slightly different answers. It's the most quietly consequential number in the whole business — the difference between getting paid for a sale and watching it disappear — and almost nobody explains it clearly. So let's fix that.

What a cookie window actually is

When someone clicks your affiliate link, a small record — historically a browser cookie — is created that says "this person arrived via this affiliate." The cookie window is simply how long that record is allowed to count. If the window is 30 days and the person buys 29 days later, you're credited. If the window is 7 days and they buy on day 8, you get nothing, even though your content is the reason they showed up.

That's the entire idea. The complication is that every network — and often every advertiser inside a network — sets its own window. Retail programs frequently run short windows of 1 to 7 days. Travel and finance, where people research for weeks, often run 30, 45, or even 90 days. The click is identical. The payout rules are not.

Two networks can look at the exact same sale and one pays you, the other doesn't. The only thing that changed was a number in a settings panel.

Why the windows differ so much

Windows aren't arbitrary — they're a negotiation between advertisers and networks about how much credit an affiliate deserves for influencing a purchase. Three forces pull on that number:

• Purchase consideration time. A £6 phone case is an impulse buy; a £2,000 holiday is researched for weeks. Longer consideration usually means a longer window.
• Margin. Low-margin retail can't afford to attribute a sale to a click from three weeks ago, so windows shrink. High-margin categories are more generous.
• Channel competition. If several affiliates touch the same buyer, the advertiser shortens the window and applies "last click wins" so they only pay once.

The part that catches people out: last click

The window decides whether a click is eligible. A second rule decides who gets paid when several eligible clicks exist. Almost all networks use last-click attribution: the most recent affiliate click inside the window takes the whole commission. So even a healthy 30-day window can pay you nothing if a coupon site grabbed a click after yours. This is why the same piece of content can perform brilliantly on one program and look dead on another.

How Adsectra reconciles it into one balance

Because Adsectra brings every program into one platform, we see each program's window on your behalf — and we normalise them. When you look at a report, you're not squinting at scattered dashboards trying to remember which one runs 7 days and which runs 45. Each conversion is already matched to the correct window, attributed under the right rules, and rolled into a single balance with one payout threshold.

You still can't change an advertiser's window — nobody can — but you stop losing money to confusion. You can see, per program, how long your clicks stay live, and you can plan content around it: push short-window retail close to a sale event, and let long-window travel and finance content compound quietly in the background.