How to calculate SEO ROI

In one line

SEO ROI is (value gained from organic − cost of SEO) ÷ cost of SEO; the value comes from organic conversions and revenue (or lead value), measured against what you spent on the work.

How to calculate it

  1. 1Track organic conversions and their value (revenue, or lead value × close rate)
  2. 2Total your SEO cost (tools, content, links, time/agency fees)
  3. 3ROI = (organic value − SEO cost) ÷ SEO cost, as a percentage
  4. 4Factor in SEO's compounding, durable nature vs one-off ad spend

Why it matters

SEO ROI justifies the investment and guides where to spend next. Because SEO compounds, traffic keeps coming after the work is done, its long-term ROI usually beats paid channels, but only if you measure conversions, not just traffic.

Frequently asked

How do I prove SEO is worth it?

Measure organic conversions and their value, compare to your SEO cost, and show ROI, plus SEO's compounding, durable traffic versus paid's stop-when-you-stop nature.

Why is SEO ROI hard to measure?

Attribution, SEO assists journeys that convert elsewhere. Use multi-touch attribution and track assisted conversions for a fair picture.

Put this into practice

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Related

Attribution explained
Giving SEO fair credit in a multi-touch buyer journey.
SEO vs SEM
Organic search vs paid search, the trade-off between cost, speed and durability.