The percentage of affiliate link clicks that result in a completed purchase (or other defined conversion event). Formula: Affiliate Conversion Rate = (conversions ÷ clicks) × 100. Typical ranges: direct-to-consumer e-commerce affiliate programs: 1-5%; subscription software / SaaS: 2-8% (for free trial conversions); high-consideration products ($500+): 0.5-2%; impulse/low-consideration products (<$50): 3-8%; category and publisher-type variation is significant. Factors that affect affiliate conversion rate: landing page quality: a poorly designed or slow-loading landing page suppresses conversion regardless of traffic quality; product-audience fit in publisher selection: publishers whose audiences don't match your buyer profile generate low-quality traffic with low conversion intent; price competitiveness: buyers who click affiliate links often do price comparisons; uncompetitive pricing suppresses conversion; promotional context: affiliate traffic during sales or promotions converts at higher rates than non-promotional traffic. Relationship to EPC: EPC = average order value × commission rate × conversion rate; improving conversion rate directly improves EPC, making your program more attractive to publishers without requiring a commission rate increase. Publisher-level conversion rate variation: individual publishers' conversion rates may vary significantly from the program average; publishers with very high conversion rates (2× program average) are driving highly qualified, purchase-intent traffic; publishers with very low conversion rates (<0.25× program average) may have audience mismatch or traffic quality issues.
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