Affiliate Cookie Duration Explained (Updated for 2026)

You send a visitor to a product page through your affiliate link. They look around, maybe add it to their wishlist, and leave. Two days later, they come back and buy it. Do you get the commission?

That depends entirely on the cookie duration. It's the window between when someone clicks your link and when a purchase still counts as yours. Outside that window, the sale might as well have come from nowhere. And different networks give you very different amounts of time.

What a Cookie Duration Actually Is

When someone clicks your affiliate link, the network drops a small tracking cookie on their browser. That cookie contains your affiliate ID. If the visitor makes a purchase while the cookie is still active, the network credits you with the sale. Once the cookie expires, the connection between you and that visitor is gone.

For a more detailed look at the full click-to-commission journey, including how redirect chains and tracking parameters work, see what actually happens when someone clicks your affiliate link.

The duration varies by network and sometimes by individual merchant within a network. Some give you 24 hours. Others give you 60 days. That gap makes a real difference in how much you earn from the same traffic.

Cookie Durations Across Major Networks

Here's what you're actually working with on the major platforms:

The range is enormous. A 24-hour window and a 60-day window are not even playing the same game. A visitor who clicks your Amazon link on Monday needs to buy by Tuesday or you get nothing. That same visitor clicking a ClickBank link has until March.

Amazon's 24-Hour Cookie (and the Cart Exception)

Amazon's 24-hour cookie is the shortest among major networks, and it trips up a lot of affiliates. Visitors often research products over multiple sessions before buying. With a 24-hour window, anyone who sleeps on the decision is a lost commission.

There is one exception. If the visitor adds an item to their Amazon cart within the 24-hour window, the cookie on that cart session extends to 90 days. They don't need to check out immediately — as long as the product stays in the cart and they eventually complete the purchase, the sale still counts as yours.

This only applies to items added during the original cookie window. If they come back a week later, browse new products, and buy those instead, those purchases are outside your attribution unless they clicked through your link again.

Why Shorter Cookies Cost You More Than You Think

Shorter cookie durations don't just mean fewer sales. They change which types of content are profitable for you.

Consider the difference between a quick impulse purchase and a considered purchase. A $15 book? Someone clicks, sees the price, buys it in the same session. A 24-hour cookie is fine. A $800 laptop? The buyer clicks your link, reads reviews, compares three other models, checks their budget, and comes back four days later to buy. With a 24-hour cookie, you just earned zero on a sale your content directly influenced.

This means Amazon affiliates promoting high-consideration products are structurally disadvantaged by the cookie duration. The content did its job — the recommendation led to a purchase. But the attribution window closed before the buyer was ready.

Cookie Overwriting: Last Click Usually Wins

Most affiliate networks use a last-click attribution model. If a visitor clicks your link, then later clicks a different affiliate's link for the same product, their cookie overwrites yours. The sale goes to whoever got the last click before the purchase, not whoever got the first one.

ClickBank's 60-day cookie, for example, lasts two months. But if the same visitor clicks another affiliate's HopLink for that product at any point during those 60 days, the new cookie replaces yours. The 60-day duration only matters if nobody else gets a click in between.

This is why cookie duration alone doesn't tell the whole story. A 90-day cookie that gets overwritten on day three is worth less than a 24-hour cookie on content that drives an immediate purchase.

When Cookie Durations Change

Cookie durations aren't permanent. Networks and merchants can change them.

On networks like Awin and CJ, each merchant controls their own cookie window. A merchant offering a 90-day cookie today might cut it to 30 days next quarter. On some networks, you'll get notice. On others, the change just happens and your conversion rate quietly drops. This kind of program change is one of the warning signs that a program might be declining.

Amazon doesn't frequently change its 24-hour cookie, but it has adjusted commission rates multiple times. A rate change and a cookie change have similar effects — less money for the same traffic — but cookie changes are harder to spot because your click-through rates look the same.

What This Means for Your Strategy

Cookie duration should factor into which programs you promote and what kind of content you build around them.

Short cookies (24 hours): Favor impulse-friendly products, lower price points, and content that catches people ready to buy right now. Product roundups and "best of" lists work well because the reader is already in buying mode.

Long cookies (30–90 days): Give you room to promote higher-priced, higher-consideration products. Detailed reviews, comparison content, and educational guides can work because the reader has time to come back and buy.

Multiple networks: If you can promote the same product through different networks with different cookie durations, the longer cookie is almost always the better choice — assuming the commission rate is comparable. A slightly lower commission with a 30-day cookie can outperform a higher commission with a 24-hour cookie on expensive products.

The Part That Breaks Silently

Cookie-based tracking has a growing vulnerability: browser privacy features. Safari's Intelligent Tracking Prevention, Firefox's Enhanced Tracking Protection, and various ad blockers can interfere with or delete third-party cookies. When this happens, the visitor clicks your link, the cookie either never gets set or gets cleared before the purchase, and you lose the attribution with no error to see.

Some networks are adapting. Impact, for example, supports server-side tracking that doesn't rely on browser cookies at all. Others still depend entirely on cookies, which means a growing percentage of your clicks may not result in trackable attribution — regardless of how long the cookie duration is.

You can't control browser privacy settings, but you can check that your affiliate links are tracking correctly and catch the problems you can actually see. Monitoring tools like AffilGuard can verify that your tracking parameters survive the redirect chain — that's the part you can fix.

The Takeaway

Cookie duration is a core factor in affiliate earnings that doesn't get enough strategic attention. It determines whether you get credit for the sales your content generates, and it varies dramatically from 24 hours to 90 days depending on the network and merchant. Knowing your cookie windows, building content that matches them, and monitoring when they change are all part of running affiliate links like a business rather than hoping they work out.