Affiliate Marketing: The Complete Guide for Brands

How affiliate marketing works

A partner promotes a product using a tracked link or code. When a visitor arrives and completes a qualifying action within the attribution window, the partner earns a commission at the agreed rate. The brand pays only after the outcome occurs, which shifts risk away from media spend and onto results.

The mechanics are simple. The difficulty is commercial: setting rates that partners find worth their effort while protecting margin, and distinguishing partners who create demand from those who intercept it at the last click.

Designing the commission model

Start from unit economics rather than category benchmarks. Model gross margin, average order value, expected return rate and repeat purchase value, then decide what share of the first order you can pay away while still acquiring customers profitably.

• Tier commissions by partner type so discovery-led partners are rewarded differently from coupon traffic.
• Consider a higher new-customer rate and a lower returning-customer rate.
• Set category-level rates where margins differ materially across the catalogue.
• Cap or exclude products where the model cannot support commission.

Recruiting partners

Most underperforming programmes are simply under-recruited. Recruitment should be treated as an ongoing operation with a target list by partner category: creators who already sell in the category, review publishers, community operators, comparison sites and marketplace affiliates.

Recruitment converts far better when partners are given a reason to say yes: a competitive rate, product supply, exclusive offers for their audience and creative they can adapt rather than repost.

Measuring incrementality

Last-click revenue overstates the value of partners who appear at the end of a journey. Reviewing new-customer share, discount dependency and assisted paths by partner cohort gives a much more honest picture of contribution, and it usually changes where the budget goes.

Common mistakes

• Launching on a platform and treating setup as the programme.
• Copying a competitor's commission rate without modelling margin.
• Paying the same rate to every partner type.
• Reviewing performance quarterly instead of monthly.
• Ignoring the interaction between marketplace vouchers and affiliate payouts.