Affiliate marketing works by paying you a commission for sending a paying customer to someone else’s product, tracked through a unique link. You don’t set the price, don’t hold the product, and don’t handle the sale itself. Your only job is the referral. Here’s exactly how that referral turns into money in your account.
The basic chain: link, click, sale, commission
Five steps cover the entire mechanism, start to finish.
- A company has a product to sell. Say a pair of headphones priced at $100.
- You join that company’s affiliate program (or a network that carries it) and get a personal tracking link, unique to you.
- You promote that link through content: a YouTube review, a TikTok or Instagram post, a blog article, an email to your list, a written comparison.
- Someone clicks your link. The tracking system logs that click and opens a window of time, called the attribution window, during which a purchase still counts as coming from you.
- They buy. If the purchase happens inside that window and follows the program’s rules, the sale is credited to you and a commission is calculated.
A worked example with real numbers: 1,000 people see your content, 100 of them click your link, and 5 of those actually complete a purchase of that $100 product. At a 10% commission rate, that’s $50 credited to you from that single batch of content, without you manufacturing, stocking, shipping, or supporting the product at any point. Money flows in one direction through the chain: the company pays the affiliate program or network, and the program pays you, once you clear its minimum payout threshold.
A concrete, widely recognized version of this chain is Amazon Associates, Amazon’s own affiliate program. You apply, get approved, and receive a personal tag you attach to any product link on Amazon’s site. From there the same five-step chain applies: someone sees your content, clicks your tagged link, and if they buy within the program’s tracking window, the sale is credited to you. Amazon’s own program agreement also spells out a specific identification requirement on top of the general chain: associates must clearly and prominently state “As an Amazon Associate I earn from qualifying purchases” wherever their links appear, a more specific version of the disclosure rule covered later in this article.
How tracking actually works
It’s easy to assume the link itself is what earns money. The link only starts the process; the tracking behind it is what decides whether you get paid.
Cookies and attribution windows are the mechanism. When someone clicks your link, the program drops a small tracking file (a cookie) or logs an identifier tied to your account. That tracking stays active for a defined period, the attribution window, which varies by program: 30 to 90 days is standard across most affiliate programs. Amazon Associates is a notable exception, running a much shorter 24-hour window from the click. As long as the customer completes a qualifying purchase inside whichever window applies, the sale is yours, even if they didn’t buy the very moment they clicked.
What happens if the customer buys later, or on another device depends entirely on the program’s tracking method. Cookie-based tracking can break if someone clears their browser cookies, switches from their phone to a laptop before buying, or uses a browser with aggressive tracking protection turned on. Some newer programs use account-based or server-side tracking that survives device switches better than a browser cookie does, but not every program has upgraded to that. The practical takeaway: don’t assume every click that should have converted actually gets credited to you. Some genuine referrals will fall through tracking gaps, and that’s a structural reality of the system, not a sign you did something wrong.
How commissions are calculated and paid
Flat-rate vs. percentage vs. tiered commissions covers the three common structures you’ll run into. A flat-rate program pays the same amount per sale no matter the order size, say a fixed $20 regardless of whether the customer bought one item or five. A percentage program pays a cut of the total sale, like the 10%-of-$100 example above. A tiered program starts you at a base percentage and increases it once you cross a volume threshold, rewarding affiliates who consistently drive higher sales counts. None of these is universally best; a flat rate can outearn a percentage on low-priced products, while a percentage can outearn a flat rate on high-ticket items.
Typical payout schedules and minimum thresholds vary by program, and most require you to clear a minimum balance before they’ll actually send money, rather than paying out every individual sale as it happens. The Shopify Affiliate Program is a real example of the shape this takes: it pays through a platform called Impact, which requires a $10 minimum balance before you can withdraw, and lets you choose to be paid once you hit that balance or on a biweekly schedule instead. What’s consistent across programs: you’re paid on their schedule, not yours, and a slow month of sales can mean an even slower month before that money actually reaches your account, since most programs also hold a short buffer period to account for returns and refunds before releasing your commission.
That buffer period exists for a practical reason: a sale that gets refunded or returned after you’ve already been credited would otherwise mean the program paying you for a purchase that didn’t actually stick. Holding the payout for a short window lets the program net out any refunds before the money moves. It also means the commission you see credited the day of a sale isn’t necessarily final; check a program’s terms for how long a sale stays “pending” before it becomes “approved” and eligible for payout, since that gap is often longer than new affiliates expect.
One more mechanical detail worth knowing up front: buying through your own link to earn a commission on your own purchase violates a program’s terms, and getting caught doing it can get an account suspended. The commission structure is built to reward a genuine referral, someone who wouldn’t have bought without your recommendation, not a purchase you were always going to make anyway.
The legal requirement you can’t skip: disclosure
None of the mechanics above matter if you skip this part. If you’re recommending a product for a commission and reaching people in the United States, the Federal Trade Commission (FTC) requires you to clearly disclose that relationship. The FTC’s own guidance is direct on this: you must clearly and conspicuously disclose the relationship, and simply tagging the brand or writing “affiliate link” in small print somewhere on the page may not be considered clear enough on its own.
Affiliate marketing itself is entirely legitimate under the FTC’s framework. What crosses the line is using it as cover for fake reviews, exaggerated claims, or advertising that misleads the person reading it. The FTC treats affiliate promotion the same way it treats any other form of advertising: it has to be truthful, and it can’t be deceptive. Put the disclosure somewhere a normal reader will actually see it before they click, not buried in a footer or a separate policy page they’d have to go looking for.
This isn’t a one-time setup either. If you disclose properly on your first piece of content but drop the habit once posting becomes routine, you’re still on the wrong side of the requirement. Every individual piece of content that includes an affiliate link needs its own clear disclosure, not just a general policy page linked somewhere on your site that most readers will never see.
Once you understand the mechanics here, the next practical question is usually whether you need a dedicated website to make any of this work: see no-website affiliate strategies. If you’re also weighing whether the income from this eventually becomes hands-off, read passive vs. active affiliate work. For the full picture of this hub, including how it stacks up against other business models, go back to the full affiliate marketing guide.