SEO ROI Formula & Long-Term Compounding Model
Direct answer: SEO Return on Investment is calculated as: SEO ROI (%) = ((Attributed Organic Revenue - Total SEO Investment) / Total SEO Investment) × 100.
Unlike paid advertising where media costs recur with every single click, organic search is a compounding capital asset. Upfront investments in crawlable web architecture, JSON-LD knowledge graphs, and authoritative content continue generating customer demand for years after deployment with zero marginal traffic costs, continuously lowering blended acquisition costs.
SEO ROI Expectations Across Campaign Lifecycle
Typical organic pipeline returns across maturity phases for commercial B2B programs: