Your investment
€
€
36-month SEO ROI
0%
Break-even month
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When returns pass cumulative investment
Incremental revenue — 36 mo
€0
Above your current organic baseline
Total investment — 36 mo
€0
At your monthly spend
Net profit — 36 mo
€0
Incremental revenue minus investment
ROI over time — the compounding effect
Milestone
Cumulative incremental revenue
ROI
Month 12
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—
Month 24
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Month 36
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—
Cumulative incremental revenue vs investment — 36 months
ROI projections are only as honest as the plan behind them
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Model: organic traffic compounds monthly (conservative 3%, expected 6%, aggressive 10%), decelerating in years 2–3; ROI = (incremental revenue − investment) ÷ investment. Industry benchmark: average SEO ROI of 748% over 3 years (FirstPageSage). Actual results depend on market, competition, and execution. Calculator provided free by ThrillSEO.