What Is Affiliate Marketing?

/ How Affiliate Marketing Works

Affiliate marketing works by putting a tracked link between a merchant and a buyer, and paying whoever placed that link after the purchase clears. The FTC's consumer infographic names that chain, and then tells the person clicking that "Everyone behind the ad gets paid" and that "You're getting tracked," which is the half most explanations leave out.

The merchant is not paying for your recommendation. It is paying for an outcome its own system recorded, which is why every commission has a technical event behind it and not a conversation.

Say a reader follows your link to a coffee grinder and buys it a day later. The merchant's system, not your description of the grinder, is what decides you get paid. The network sits in the middle because merchants do not want to run payouts for thousands of small partners and marketers do not want a separate contract with every brand. A network holds the tracking, the reporting and the money movement for many merchants at once. Plenty of large merchants skip it and run the program in-house, which is what Amazon does with its Associates program.

/ How the Sale Gets Tracked Back to You

Your affiliate link is an ordinary product link with an identifier bolted on. When somebody follows it, the merchant records that the visit came from you, then waits to see whether a purchase follows inside a set period. Amazon's own agreement talks about Sessions attributed to your Special Links, which is the same idea named in its vocabulary.

Two things about that period are worth knowing before you build anything on it. It is set by the merchant and written into the program agreement, so it is a term you accept and not a number you negotiate. And it is often short, which means a reader who bookmarks the product and buys next month can earn you nothing.

/ How Affiliate Marketers Get Paid

Affiliate marketers get paid in three shapes, and which one you get is decided by the program before you apply. Pay per sale hands you a percentage of what the customer spends. Pay per lead hands you a flat fee for an action short of a purchase. Pay per click pays on the traffic itself, which is the model that puts all of the risk on the merchant.

Amazon runs the first two side by side, and the second is easier to see because the amounts are printed as money instead of percentages. Its published bounty table pays $3.00 for a customer who signs up for a Prime trial, $15.00 for a business that opens an Amazon Business account, and $2.00 for a registered Electronic Benefit Transfer (EBT) card. None of those is a sale. Each is an action the merchant decided was worth a fixed price.

The practical difference is what you have to persuade somebody to do. A percentage of a sale rises with the price of the thing sold and pays nothing if the person browses and leaves. A flat fee for a signup pays the same whether the customer turns out to be worth a fortune or nothing at all, which is why programs tend to offer it for actions they can value in advance.

/ What Amazon Actually Publishes

Amazon publishes a fixed commission rate for every product category, and the everyday categories sit near the bottom of it. That card is the real answer to how much Amazon affiliates get paid, and it is public. Retrieved in August 2026, it reads as follows.

Amazon Associates Standard Commission Income Statement, Table 1, retrieved August 2026.

Three details in that table change what a beginner should do with it. The 4.00% All Other Categories row is the true default, so an unlisted product pays better than home, sports or grocery. The 0.00% rows exist, which means it is possible to send a customer to a purchase and earn nothing at all. And the card carries caps as well as rates: commission on fine art is limited to a maximum of $200 per product however expensive the piece is.

/ How Much Affiliate Marketing Actually Pays

What affiliate marketing pays is decided by the category rate, and the honest form of the question is a sales number. Take the monthly commission you want, divide it by your category's published rate, and the result is the qualifying sales you have to send the merchant that month. That single division does more to settle "can I make a living at this" than any amount of encouragement, because the rate is fixed and published before you write a word.

Run it across the card and the spread is severe. The same monthly commission needs ten times the sales volume in a 1.00% category as in a 10.00% one, and a little over three times as much at 3.00% as at 10.00%. Groceries, health and personal care are the 1.00% rows. They are also the categories a new site is most likely to write about, because everybody buys them.

Two things soften the arithmetic and one thing hardens it. A low rate on an expensive product can beat a high rate on a cheap one, since the percentage applies to the price. Some programs pay better than Amazon's card, especially software and services that pay a share of a subscription. What hardens it is that none of those change the shape of the calculation: you are still solving for sales volume, and you still need to know the rate before you can.

/ What Affiliate Marketing Is Good At

Affiliate marketing is good at earning from a recommendation you were going to make anyway, and poor at everything that has to happen before somebody trusts a recommendation. Each of its real benefits carries its limit in the same breath.

• No inventory, no support, no refunds. You also control none of those, so a merchant who ships late spends your credibility, not theirs.
• You are paid on results. No result means no pay, and the months where nothing converts are still months you worked.
• It layers onto content that already exists. Only if that content was already helping somebody choose between products, which most content is not.
• The barrier to entry is an application, not capital. Approval is the merchant's decision and it is usually made on what you already publish, so the cost is the year of publishing that came first.

The scale of it is worth knowing before you plan around it. A 2026 University of Iowa and University of California, Davis study of 2 million YouTube videos from 540,000 creators found affiliate links on 7.35% of videos and 6.81% of channels, making up 8.55% of all the hyperlinks in the dataset. This is a real practice at meaningful size, and not the universal one the guides imply.

It is also growing. Comparing videos uploaded from 2015 to 2018 against those uploaded from 2018 to 2024, the same study found the share of videos carrying affiliate links rose from 5.3% to 8.5%, and the share of channels from 5.2% to 7.7%.

/ The Types of Affiliate Marketing

Three types of affiliate marketing are worth telling apart, and they differ by how much of your own credibility you are spending.

• Unattached. You promote a product you have no relationship with and no view on, which is closest to buying ads and hoping the margin survives.
• Related. The product fits your subject, so your audience finds the recommendation plausible, though you have not used it yourself.
• Involved. You have used the thing and you say so. This converts best and is the only one of the three that costs you something when the product is bad. Say a photographer who has carried the same camera bag for years and can name what is wrong with it.

The boundary against influencer marketing is worth stating once. An affiliate is paid on a tracked action, so no action means no payment. An influencer is usually paid for the post itself, whatever the post produces. Plenty of creators do both at the same time, which is why the two get blurred, but the payment trigger is different and so is the risk each side carries.

/ Which Niches Actually Carry Affiliate Links

Which niches carry affiliate links has been measured, and the answer is not the passion test every guide hands out. The 2026 study of 2 million YouTube videos reports the share of videos in each content category that carry an affiliate link, and the top category carries them more than fifteen times as often as the bottom one.

Sun, Vekaria, Shafiq and Nithyanand, 2026, top 15 YouTube categories.

Only two categories clear the study's own bar for high affiliate activity, a full standard deviation above the mean: Howto and Style at 26.6% and Science and Technology at 23.8%. Both are categories where the viewer arrived already comparing products. Music at 3.4% and News and Politics at 3.2% are categories where nobody arrived to choose anything, and the affiliate rate reflects it.

That reframes the niche question. A niche is not a personality you commit to. It is a place where somebody was already going to pick between two products, and your judgment can shorten that decision. Passion decides whether you will still be publishing in a year, which matters, but it does not decide whether anyone reading is in a buying mood.

Two caveats keep this honest. The measurement covers YouTube, so it describes where video affiliate links sit and not where every affiliate link sits. And the researchers say their sample carries more gaming, music and entertainment than YouTube does, with those three accounting for over 50% of it. Neither caveat moves the top of the table, because those three categories sit at the bottom of it.

/ How to Start Affiliate Marketing

Beginners get into affiliate marketing by starting from a placement they already have, joining a program that will accept it, and putting a tracked link inside something that helps a reader choose. The order matters more than the tactics: the audience comes before the program, because a program approves you on what you already publish.

1. 1Name what you already publish, and the choice its readers are making. A newsletter about home espresso has readers choosing grinders. A channel about freelance work has viewers choosing invoicing software. If you cannot name the choice, you do not have a placement yet, and step one is making one.
2. 2Check whether that category carries links at all. The table above is the evidence for video, and the pattern generalizes: categories where people compare before buying carry affiliate links, and categories where they do not, do not.
3. 3Read the rate before you fall in love with the product. The published rate is the ceiling on everything that follows, and it is available to you before you write anything.
4. 4Apply, and read the terms you are agreeing to. The rate, the attribution period, what voids a commission, whether your placement type is permitted at all, and how you get paid are all in the program agreement.
5. 5Put the link where the decision is being made. Inside the comparison, the tutorial or the review, next to the sentence that answers the reader's question.
6. 6Disclose it, clearly and where the reader will see it. The legal standard is one sentence long, and it asks for less than you would guess.

/ Where to Find Programs and Networks

Programs come from two places, and the choice between them is a trade, not a ranking. An affiliate network gives you one application, one dashboard and one payout across many merchants, and it takes a cut for holding that infrastructure. An in-house program, run by the merchant, cuts out the middle and is where large retailers usually sit. Amazon Associates is the in-house example almost every beginner meets first.

Judge either one on five things, in this order: the published commission rate for the categories you would sell, the attribution period, whether your placement type is allowed by the agreement, what the approval requires of you, and the payout threshold and schedule. A directory of programs answers none of those, which is why the long lists of "best affiliate programs" are less useful than they look.

/ What to Promote

Promote what your audience is already choosing between, then check its rate before you commit. Those two tests in that order will remove most candidates. The same sales volume pays a tenth as much in a 1.00% category as in a 10.00% one, and a high-rate product nobody in your audience is shopping for pays nothing at all.

Checking costs one look at a published page, and the answer holds for every product in that category. The test is run once per category, not once per product, which is what makes it cheap enough to run before you commit.

/ Where to Put the Links

Four placements carry most affiliate links, and each has a craft of its own that sits outside affiliate marketing. A site or blog, where the link lives inside a review or comparison and search brings the reader, which is search engine optimization work. Video, where the link sits in the description under a tutorial or a hands-on. Email, where the link goes to a list that already opted in, and the sending rules belong to email marketing. Social, where the link fights the platform's dislike of outbound links and reach depends on who uses each platform.

The affiliate part is identical in all four: a tracked link, next to a real recommendation, with a disclosure attached. Everything else about them is the craft of that channel.

/ What You Have to Disclose

What you have to disclose is one sentence long, and the duty is yours as well as the brand's. Section 255.5 of Title 16 of the Code of Federal Regulations (CFR) is the rule. A connection that "might materially affect the weight or credibility of the endorsement," and that "is not reasonably expected by the audience," must be disclosed "clearly and conspicuously," in the regulation's own words.

The FTC's own worked example in that section is a blogger with affiliate links. A coffee lover reviews coffee makers independently, includes affiliate links, and receives a portion of each sale. Because knowing about that payment could affect how much weight a reader gives the review, the regulation says the reviews should clearly and conspicuously disclose the compensation.

The part almost every guide leaves out is how much detail is required, and the answer is less than people fear. The same section says a disclosure "does not require the complete details of the connection, but it must clearly communicate the nature of the connection sufficiently for consumers to evaluate its significance." You do not have to publish your rate. You have to make the relationship legible.

Against that one sentence, the measured compliance is poor. In the 2026 study of affiliate videos on YouTube, 12.20% carried a disclosure that clearly met the standard, 18.61% carried one that was ambiguous, and 69.19% were non-compliant, with 54.19% of affiliate videos carrying no disclosure whatsoever.

It gets worse as channels get bigger, which is the opposite of the usual assumption. Among videos uploaded between 2018 and 2024, non-compliance was 61.4% for channels with 1,000 to 100,000 subscribers, 62.3% for channels between 100,000 and 1 million, and 74.7% for channels above 1 million. Enforcement, penalties and who carries them are a separate subject. What the rule requires of you is the sentence quoted above, and it costs one line of text.

One more pattern in the same data is worth having. The two categories carrying the most affiliate links, how-to and technology, sit at the bottom of the non-compliance column too, at 55.9% and 54.4%, with pets and animals at 54.5% between them. Comedy, near the bottom for affiliate activity, was the worst at 92.3%. The communities that do this often are the ones that have learned to say so.

/ What Affiliate Marketing Looks Like in Practice

In practice affiliate marketing looks like four content shapes, and each one is a moment where a reader is deciding between named options. None of them requires an audience of any particular size to start.

• The review. One product, used or tested, with the link where the verdict lands. Say a woodworking channel that has spent a year on one brand of chisel.
• The comparison. Two or more options set against each other, with a link on each. Say a newsletter for new parents that compares three car seats on the specification that matters and links all three.
• The tutorial. A job done end to end, with links to the things used along the way. This is the shape behind the how-to category topping the affiliate table.
• The resource page. A standing list of what you use and recommend, linked, and updated when your answer changes.

What none of these looks like is a page of links with no argument attached. The commission is paid for a decision the reader made, so the writing that helps them decide is the whole product.

/ What Goes Wrong

Four things go wrong more often than anything else, and each one is pointed at by the evidence above.

• Choosing the category by feeling instead of by rate and demand. A 1.00% category with no comparison shopping in it can absorb a year of work and pay for none of it.
• Treating disclosure as optional. Nearly seven in ten affiliate videos in the study were non-compliant, and the biggest channels were the worst, so this is the norm and not an oversight. It is also the cheapest thing on this list to fix.
• Stacking links instead of earning one. Affiliate videos in the study averaged 5.28 unique affiliate links, making up 38.02% of all the links in their descriptions. A description that is mostly affiliate links tells a viewer exactly what it is.
• Not reading the agreement. The attribution period, the categories that pay 0.00%, the caps such as the $200 limit on fine art, and the rules about where a link may be placed are all published before you join. All of them can change afterwards.

/ The Short Version

Affiliate marketing pays a commission on a tracked action, inside a window the merchant sets, in a chain of four parties the FTC lays out plainly. What it pays you is published before you start: Amazon's card runs from 10.00% down to 0.00%, with 4.00% for anything unlisted, and the arithmetic that turns a commission target into a sales target is one division.

Two questions settle whether this is worth your year. Is there a category where your readers are already choosing between products, and what does that category pay? Answer those with the published rate and the category table, disclose the relationship in one clear line, and the rest is the ordinary work of being useful to somebody about to spend money.

/ Sources

• Associates Program Standard Commission Income Statement, Amazon Associates Central, retrieved August 2026.
• How Affiliate Marketing Works, Federal Trade Commission consumer infographic.
• 16 CFR 255.5, Disclosure of material connections, Code of Federal Regulations, 2024 edition.
• Turning Trust to Transactions: Tracking Affiliate Marketing and FTC Compliance in YouTube's Influencer Economy, Chen Sun, Yash Vekaria, Zubair Shafiq and Rishab Nithyanand, arXiv 2603.04383, 2026.