Top-line revenue generated by organic search divided by SEO costs. This measures gross revenue rather than bottom-line net profit.
A revenue-based SEO return compares a defined amount of revenue with SEO cost. One clearly labeled convention is attributed organic revenue divided by SEO investment, expressed as a multiple. A 3× result means three dollars of the stated revenue measure per dollar of the stated cost; it does not mean three dollars of profit.
This measure can be useful when full profit data is unavailable, but the limitation should stay visible. Revenue does not account for the costs of delivering goods or services unless the measure has been redefined. Calling the ratio net ROI would obscure that difference. A calculation that subtracts marketing cost from revenue is another convention and should be named and explained separately.
The numerator still requires scope. Total attributed revenue and estimated incremental revenue answer different questions. Choose one, label it and keep the same reporting period as the cost denominator. Do not mix several years of projected customer revenue with a single month of spend without explicitly explaining that model and its assumptions.
Takeaway: Use a revenue-to-cost multiple only when its basis is clear. It can summarize a relationship between revenue and spending, but it cannot establish profitability or causal impact on its own.
Example
A report shows $30,000 of attributed organic revenue and $10,000 of SEO cost for the same period. The revenue-to-cost multiple is 3×. Fulfillment costs and the uncertainty of attribution remain separate, so the team does not call this 300% net ROI.
What to check
Label the numerator as total attributed or estimated incremental revenue. A zero cost denominator makes the ratio undefined. Check refunds, period alignment and the cost allocation before comparing campaigns.
For more detail, see Google ROI explanation.