SEO ROI Calculator

SEO ROI = (gross profit from organic sales − SEO cost) ÷ SEO cost × 100. Use gross profit, not revenue, so product costs count. In the example: $78,803 gross profit minus $36,000 cost is $42,803, divided by $36,000 is 119%. Gross profit is visits × conversion rate × order value × margin.

Anything above 0% means SEO paid for itself in the time you counted, but SEO usually needs 2 to 3 years to show its full return. Over 3 years, 100% to 300% is common for a sound campaign on a site that converts. Judge it against your other channels over the same time. If paid search returns 30% a month but stops the day you stop paying, SEO can still win over 3 years.

Usually 6 to 18 months. Rankings build slowly, so the first months cost more than they bring. The example pays back in month 15. Stretch the ramp from 6 to 12 months and it moves to month 19. Pay for only 6 months instead of 12 and it pays back in month 9, because you stop spending while traffic keeps coming.

The same way, with bigger numbers and longer timelines. Enterprise sites often pay $10,000 to $50,000 a month, ramp more slowly, and close sales offline. Use lead value instead of order value: average deal size × close rate. If a lead is worth $2,000 and 1% of visits become leads, each visit is worth $20 before margin. Set the time to count to 3 to 5 years.

They do different jobs. PPC brings traffic the day you pay and stops when you stop. SEO costs more up front and keeps paying after. The example's traffic would cost $131,338 as ads at $2.50 a click, against $36,000 for SEO. PPC is better for testing offers and seasonal pushes. SEO is better for steady demand you'll want for years.

It fades slowly, as competitors publish and pages age. We assume 3% of the traffic is lost each month after you stop, which keeps most of it for a year or more. With no fade, the example's 3-year ROI rises from 119% to 179%. If your market is competitive, raise the fade under More options.

Small businesses often pay $1,000 to $5,000 a month for an agency or freelancer. In the example, raising the cost from $3,000 to $5,000 with the same results drops the ROI from 119% to 31% and payback to month 25. Work backward: the most you can pay is roughly the gross profit the traffic will bring over 3 years, divided by the months you'll pay.

Start with the monthly searches for the keywords you'll target. A top 3 ranking usually gets 10% to 30% of the clicks, and a page on page 2 gets almost none. Add up the expected clicks across keywords, then cut the total in half for a low case. Check the result against what similar pages on your site already get.

Use your site's actual conversion rate for organic visitors from your analytics. Ecommerce sites often convert 1% to 3%. Service businesses that count leads often see 2% to 5%. In the example, dropping from 2% to 1% cuts the ROI from 119% to 9% and pushes payback to month 32.

Yes. List months in rows. For each month, enter the cost, the visits (ramping up, then fading), visits × conversion × order value × margin for gross profit, and a running total of profit minus cost. Payback is the first month the running total turns positive. The table under this calculator has those columns, and its Excel button saves them as a spreadsheet.