Resource Guide
Affiliate Program KPIs: The Metrics That Actually Predict Growth
Tracking the right KPIs separates programs that grow systematically from those that fluctuate without direction. These are the metrics that matter.
Revenue KPIs
GMV (Gross Merchandise Value): total sale value attributed to affiliate channel. Commission Paid: total commissions to publishers. Network Fees: 20-30% of commission paid. Program ROAS: GMV / (Commissions + Network Fees + Management Cost). Target: 5x+ ROAS for established programs. New Customer Rate: % of affiliate sales from first-time buyers. Target: 40%+ for healthy incrementality. Average Order Value: should be tracked per publisher tier to identify traffic quality issues.
Publisher KPIs
Active Publisher Rate: % of approved publishers who drove at least 1 sale in the trailing 30 days. Target: 30%+ (anything below 20% indicates a recruitment or activation problem). Publisher Retention Rate: % of last month's active publishers still active this month. Target: 70%+. New Publisher Activations: first-sale publishers this month — the leading indicator of future GMV growth. Top Publisher Concentration: % of GMV from top 5 publishers. Alert if >50% — dependency risk.
Traffic & Conversion KPIs
Click-to-Conversion Rate: affiliate clicks / affiliate sales. Healthy range: 1-4%. Below 0.5% indicates landing page or traffic quality issues. EPC (Earnings Per Click per 100): total commissions / clicks × 100. Publisher-facing metric that determines program attractiveness. Target: $50+ EPC to compete for publisher attention. Return Rate: % of affiliate sales reversed for returns. Above 15% indicates content-conversion mismatch or publisher driving low-quality traffic.
Program Health Score
Composite monthly metric combining: Active Publisher Rate (25% weight), New Publisher Activations (25% weight), Program ROAS (25% weight), New Customer Rate (25% weight). Score each metric against benchmarks (above benchmark = 100, below = proportional score). Program Health Score below 60 warrants immediate review. Above 80 indicates a program in growth mode.
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