Cookie duration (also called cookie window or cookie life) is the length of time an affiliate tracking cookie remains active in a user's browser after they click an affiliate link. If the user converts within the cookie window, the referring publisher receives credit and earns a commission. Cookie durations typically range from 24 hours to 90 days, with 30 days being the industry standard for many affiliate programs. The longer the cookie, the more conversions you'll capture from users who don't convert immediately.
Why Cookie Duration Matters
Not every user converts on their first visit. A user might click your affiliate link, browse the advertiser's site, leave, think about it for a few days, and then come back to sign up. If the cookie is still active when they return, you get credit for the conversion. If the cookie has expired, you lose the commission.
This makes cookie duration directly tied to your earnings:
- Longer cookies = more conversions captured — You earn commissions from users who take days or weeks to decide.
- Shorter cookies = more conversions lost — Any user who doesn't convert within the window is revenue you miss.
- High-consideration products need longer cookies — Products that require research and deliberation (insurance, software, expensive purchases) have longer decision cycles, making cookie duration even more critical.
How Cookie Tracking Works
- A user clicks your affiliate tracking link.
- The affiliate network or program sets a cookie in the user's browser. This cookie contains your publisher ID and a timestamp.
- The user lands on the advertiser's page and browses (but doesn't convert yet).
- Days later, the user returns directly to the advertiser's site. The browser still has your cookie.
- The user completes the desired action (signs up, purchases, installs, etc.).
- The advertiser's conversion tracking pixel checks for affiliate cookies and finds yours.
- You receive credit for the conversion — as long as the cookie hasn't expired.
Common Cookie Durations
| Cookie Duration | Common Programs/Verticals | Impact on Publishers |
|---|---|---|
| 24 hours | Amazon Associates, some CPA offers | Must convert same day — only captures impulse actions |
| 7 days | Some SaaS, quick-decision products | Short window — works for low-consideration products |
| 30 days | Most CPA networks, many affiliate programs | Industry standard — captures most considered decisions |
| 60 days | Mid-tier affiliate programs, some e-commerce | Good — catches slower decision-makers |
| 90 days | Premium affiliate programs, enterprise software | Generous — high-consideration purchases have time to convert |
| Lifetime | Some SaaS, subscription services | Best possible — any future conversion is attributed to you |
Cookie Duration and the Death of Third-Party Cookies
Cookie-based tracking has been significantly impacted by browser privacy changes:
- Safari (ITP) — Intelligent Tracking Prevention limits third-party cookies to 7 days and sometimes blocks them entirely.
- Firefox (ETP) — Enhanced Tracking Protection blocks many third-party tracking cookies by default.
- Chrome — Google has been phasing out third-party cookie support, fundamentally changing web tracking.
- Ad blockers — Many ad blockers delete or prevent tracking cookies from being set.
These changes mean that even if an offer has a "30-day cookie," the cookie may only survive a few days (or not be set at all) depending on the user's browser and settings. This is a major reason why the industry has shifted toward server-to-server postback tracking, which doesn't rely on browser cookies at all.
Cookie Duration vs. Postback Tracking
| Factor | Cookie-Based Tracking | Postback (S2S) Tracking |
|---|---|---|
| Relies on browser cookies | Yes — vulnerable to ITP, ad blockers, user clearing cookies | No — server-to-server communication |
| Attribution window | Limited by cookie duration and browser behavior | Determined by the network/advertiser, not browser settings |
| Accuracy in 2026 | Declining — estimated 15-30% of cookies are blocked or deleted | High — near 100% when properly implemented |
| Cross-device | No — cookies are browser-specific | Possible with click ID matching |
For CPA networks like RevBoost that use postback tracking, the traditional "cookie duration" concept is less relevant. Conversions are attributed based on click IDs passed server-side, which are more reliable than browser cookies.
Example: Cookie Duration Impact on Earnings
Scenario: You promote a SaaS product. 1,000 users click your affiliate link. Here's how different cookie windows affect your conversions:
| Cookie Duration | Users Who Convert | Payout ($20/each) | Lost Conversions |
|---|---|---|---|
| 24 hours | 15 | $300 | 25 users converted later but cookie expired |
| 7 days | 25 | $500 | 15 users converted later but cookie expired |
| 30 days | 35 | $700 | 5 users converted later but cookie expired |
| 90 days | 39 | $780 | 1 user converted later but cookie expired |
The difference between a 24-hour cookie and a 30-day cookie is $400 — a 133% revenue increase — from the same traffic. When choosing affiliate programs, cookie duration should be a key factor in your decision.
Related Terms
- Pixel vs Postback Tracking — Tracking methods, with postback replacing cookie-dependent pixels
- CPA (Cost Per Action) — The pricing model where cookie duration affects conversion attribution
- EPC (Earnings Per Click) — Metric affected by how many conversions your cookie window captures
- Commission Shaving — Some lost conversions attributed to "expired cookies" may actually be shaving
- Deep Linking — Sending users to specific pages improves same-session conversions, reducing cookie dependency
Track Conversions Accurately with RevBoost
RevBoost uses server-to-server postback tracking that doesn't depend on browser cookies — ensuring you get credit for every conversion you drive. Real-time tracking, competitive payouts, and on-time Net-30 payments since 2008.
Apply as a Publisher