Affiliate marketing

Affiliate marketing pays creators a commission when someone buys a product through a tracked link or code that the creator shared. It suits creators whose audiences come to them for recommendations: reviewers, educators, hobby and craft creators, travel, fitness, technology and lifestyle channels. Affiliate income requires no inventory, no customer service and no negotiation for each deal, and it can keep earning from old content for years. But it also depends on the honesty of recommendations, the terms set by merchants and networks, and clear disclosure to the audience. This lesson explains how affiliate programs work, the key metrics, conversion rates, earnings per click (EPC) and average order value, how to choose programs and products, how to place links effectively and honestly, and the disclosure rules that apply in Canada and the United States.

How affiliate programs work

An affiliate program is an arrangement in which a merchant pays a commission to partners who refer customers. The creator joins a program, receives unique tracking links or discount codes, and shares them in content, descriptions, posts or newsletters. When a viewer clicks the link, a tracking cookie or similar identifier records the referral; if the viewer buys within the attribution window, often between 24 hours and 90 days depending on the program, the creator earns a commission. Commissions are usually a percentage of the sale, a fixed amount per sale, or a fixed amount per lead or sign-up.

Programs come in several forms:

• Large retailer programs, such as Amazon Associates, which cover millions of products with commission rates that vary by product category and are often in the low single digits, with short attribution windows.
• Affiliate networks, such as Impact, CJ, Rakuten Advertising, ShareASale or Awin, which connect creators to many merchants through one account.
• Direct merchant programs, run by individual brands, especially in software, education and direct-to-consumer products, which may offer higher commissions or recurring commissions on subscriptions.
• Platform shopping programs, such as YouTube Shopping, TikTok Shop and Instagram product tags, which let creators tag products within content and earn commission inside the platform.

Commission rates differ enormously: physical goods from large retailers may pay a few percent, while software and digital courses may pay 20 to 50 %, sometimes recurring monthly for as long as the customer stays subscribed.

Key metrics

Affiliate performance can be broken into a chain of rates. Click-through rate (CTR) is the share of viewers who click; conversion rate is the share of clicks that result in a purchase; average order value (AOV) is the average value of each purchase; and the commission rate is the share of each sale paid to the creator.

Earnings per click (EPC) combines the last three factors into a single figure that is useful for comparing programs. Networks often report EPC per 100 clicks.

This example shows why headline commission rates alone are misleading: conversion rate, order size, attribution window and recurring terms all matter.

Attribution windows and cookie rules

The attribution window, often called the cookie duration, is how long after a click a purchase still counts. A 24-hour window, common for large retailers, rewards creators whose viewers buy immediately; a 30- to 90-day window rewards considered purchases. Most programs credit the last affiliate link clicked before a purchase, so a viewer who clicks another creator's link later may move the commission. Browser privacy features, ad blockers and app-based shopping can break cookie-based tracking, which is one reason discount codes are popular: a code entered at checkout credits the creator regardless of how the viewer reached the store, and it gives the audience a benefit too.

Choosing programs and products

The best affiliate products are things the creator genuinely uses or has tested, that fit the audience's needs, and that are sold by reputable merchants with good customer service. Recommending a poor product for a high commission may earn money once, but returns, complaints and lost trust cost more. Practical criteria include:

• Relevance: the product solves a real problem for the audience.
• Quality and honesty: the creator would recommend it without the commission.
• Commission rate, conversion rate and EPC, ideally from network data or a test.
• Attribution window and whether commissions are recurring.
• Payment terms: minimum payout, payment schedule and reversal policies for returns.
• Restrictions: some programs forbid links in certain places, paid ads on brand terms or coupon sites.
• Availability in the audience's countries: a US-only program earns nothing from Canadian viewers, and vice versa; regional retailer programs and geo-targeted links help.

Placing links effectively

Affiliate links work best where viewers are already deciding what to buy. Effective placements include product reviews and comparisons, tutorials that use specific tools, gear lists and kit pages on a website, newsletter recommendations, pinned comments and descriptions, and platform product tags. Content that answers buying questions, such as "best budget microphone for podcasting" or "how to choose hiking boots", attracts viewers with high purchase intent and can earn for years through search. A website or resource page with the creator's recommended gear, updated regularly, gives one stable destination that can be linked from every video. Creators should check links regularly, because products go out of stock, programs close and links break; broken links in old content silently lose revenue.

Disclosure rules

Affiliate links are a material connection between the creator and the merchant: the creator benefits when the viewer buys. Both Canadian and US law require that such connections be disclosed clearly so audiences can judge recommendations. Disclosure must be clear, close to the recommendation, and understandable, not buried in a long description or hidden behind a "more" link, and it should appear in the content itself when the recommendation is spoken or shown, not only in written text.

In the United States, the FTC's Guides Concerning the Use of Endorsements and Testimonials in Advertising, revised in 2023, require clear and conspicuous disclosure of material connections, including affiliate commissions. The FTC's guidance for influencers recommends simple language such as "I get commissions for purchases made through links in this post", placed where viewers will see it, and spoken in video. The FTC's rule on fake reviews and testimonials, finalized in 2024, adds civil penalties for certain deceptive review and endorsement practices.

Amazon Associates and many networks also require specific disclosure wording in their terms. Disclosure does not reduce affiliate income much in practice; audiences generally accept affiliate links from creators they trust, and many appreciate that clicking supports the creator at no extra cost. CRE-320 and CRE-330 cover advertising law and contracts in more depth.

Taxes and records

Affiliate commissions are business income. Creators should keep records of commissions by program, including reversals for returns, and reconcile payments against network reports. US networks may request tax forms, as with platform programs. Sales taxes are normally the merchant's responsibility, because the merchant makes the sale; the creator's commission is payment for a referral service. Whether that referral service is itself subject to GST/HST or US state sales tax depends on registration status and local rules; CRE-330 covers this.

Building an affiliate strategy

A sustainable affiliate strategy focuses on a manageable set of products the creator trusts, creates evergreen content that answers buying questions, keeps a central recommendation page up to date, tracks EPC by program and placement, tests discount codes against links, and reviews programs annually. It treats affiliate income as a by-product of genuinely helpful recommendations rather than the reason for them. Combined with ad revenue on the same content, affiliate links can substantially increase revenue per view without adding sponsorship negotiations or products to manage.

Testing and measuring affiliate performance

Affiliate performance improves with measurement. Most networks provide reports of clicks, conversions and commissions by link, and creators can use separate tracking IDs or sub-IDs for each video, platform or placement. This reveals which content drives sales, whether description links outperform pinned comments, and whether a discount code beats a link. A simple test changes one variable at a time, such as the wording of a call to action, the position of a link, or whether the product is shown on screen, and compares results over enough clicks to be meaningful.

Reversals, returns and payment terms

Affiliate commissions are usually not final when a sale is recorded. Merchants reverse commissions for returned or canceled orders, fraudulent purchases and orders that break program rules, so reported earnings often fall before payment. Networks commonly pay 30 to 90 days after the end of the month in which a sale occurred, once the return period has passed, and many set minimum payout amounts. Creators should forecast on approved rather than pending commissions, watch for unusually high reversal rates, and read program terms on what counts as a valid referral. Some programs prohibit creators from buying through their own links, using links in paid search ads, or posting links in places such as emails without permission.

Ethics beyond disclosure

Disclosure is the legal minimum, not the whole of ethical affiliate practice. Creators who rely on affiliate income should consider whether their reviews are balanced, whether they mention drawbacks and alternatives, and whether a higher commission influences which product they call the best. Many trusted reviewers publish their review policies, buy products themselves rather than relying on free samples, or recommend the best product even when it has no affiliate program. Audiences notice when every video ends with a link to the most expensive option, and creators who protect their credibility usually earn more over time.

Affiliate links on different platforms

Platforms handle links differently. YouTube allows links in descriptions, pinned comments and product shelves; Instagram restricts clickable links in captions, so creators use bio links, stories and shopping tags; TikTok has its own shop and bio links; podcasts depend on spoken codes and show notes; newsletters allow direct links. Creators should check each platform's rules on external links, as some reduce reach for posts with outbound links or prohibit certain affiliate programs.