Cookie Window

What is Cookie Window?

The cookie window is the period of time following an affiliate link click during which a customer's purchase will be attributed to that affiliate — also called cookie duration or attribution window — after which the tracking expires and any subsequent purchase earns no commission.

Cookie Window In Practice

The cookie window is the most consequential structural variable in an affiliate program after the commission rate itself. It determines how long your referred traffic is 'yours' before the attribution resets. Amazon Associates' 24-hour window is the shortest of any major program — a customer who clicks your link, takes a day to think, and buys 26 hours later earns you nothing. Most SaaS and software programs offer 30–90 day windows; some offer lifetime attribution tied to the customer's account rather than a time-limited cookie. The window length should directly inform your content strategy: short windows favour content that captures buyers at the final decision point (reviews, comparison articles targeting buyers already in evaluation); long windows allow you to effectively promote to research-phase audiences who may not convert for weeks. When comparing two otherwise similar programs, a program with a 90-day window is meaningfully more valuable than one with a 7-day window for an affiliate producing top-of-funnel educational content, because more of the eventual buyers will still be within the attribution window when they purchase.

Example of Cookie Window