How many months until your SEO pays for itself?
Using your own data or industry averages, find out the month you recover your investment and how much you gain at 12 and 36 months.
How your investment evolves
The charts update whenever you change any value.
12-month ROI by scenario
Conservative 0.8x · Expected 1x · Optimistic 1.2x applied to traffic growth
Cumulative net gain at 36 months
Below zero, you are still recovering your investment
Frequently asked questions
What is SEO ROI?
It is the ratio between what you earn from additional organic traffic and what you invest in SEO. An ROI of 100% means you recover your investment and earn the same amount again. Here we calculate it on gross profit, not revenue, so the figure stays realistic.
When do results start to show?
For most local and B2B businesses, the first movements arrive between months 3 and 6, and the full effect between months 9 and 12. On average, the investment is recovered between months 7 and 9 (First Page Sage, 2026); in local SEO it can take 6 to 12 months, and in highly competitive sectors such as legal, sometimes more than a year. That is why the calculator includes an initial delay and a ramp-up period you can adjust.
What counts as a good ROI?
Above 100% at 12 months is already a solid investment. SEO also keeps paying off when other channels stop: that is why the gain at 36 months is usually several times the gain at 12. If the result is negative, check the value per customer or your starting traffic: another channel may suit you better first.
Where do the preloaded values come from?
They are sample values to show how the calculator works. The 0.7% conversion rate is a market average: organic traffic converts to a lead at 4.9% on average (Ruler Analytics, 2026), and leads from SEO close as customers at around 14.6% (HubSpot). For your case, use real traffic from Google Search Console or Analytics, your own conversion rate and the average value of a customer (first sale or lifetime value, whichever you prefer).
Why are there three scenarios?
Because nobody can promise exact rankings. The conservative scenario assumes 20% less than the expected traffic growth; the optimistic one, 20% more. That way you see a reasonable range instead of a single figure.
Do you store my data?
No. All calculations run in your browser and nothing is sent to any server.
Do you want these results for your business?
How we calculate
A transparent formula, no black boxes.
1. Results ramp-up
SEO does not perform from day one. During the initial delay we count no revenue; after that, the effect grows linearly up to 100% at the end of the ramp-up.
2. Extra profit each month
New visits times the conversion rate, times the value of each customer, times your gross margin. The scenario multiplies the traffic growth.
3. Net gain and ROI
We add up the profit of every month and subtract what was invested in SEO. The ROI compares that gain with the investment of the first 12 months.
Without traffic data
We start from your revenue: the share that comes from Google is your organic baseline, and we apply the target growth to it. Conversion and value per customer are already included in the revenue.
4. Payback
The first month in which the cumulative net gain reaches zero or more.
An estimate, not a promise: results depend on the competition in your sector, the current state of your website and the execution.
Gross profit: we apply your gross margin to each sale; we do not subtract fixed costs or taxes. The default 38% is the market average (37.8%; healthcare centres 39.1%) according to Damodaran, NYU Stern, January 2026. In software it is around 72%.
Conversion: 0.7% visit-to-customer = 4.9% visit-to-lead (organic average, Ruler Analytics 2026) × 14.6% lead-to-customer (SEO leads, HubSpot). It varies a lot by sector: legal and professional services convert to leads above 7%; healthcare, below 2%.
Without traffic data: if you do not know your visits, we estimate that 40% of your revenue comes from Google, the low end of the 40-60% range that Hashmeta (SEO ROI Statistics, 2025) attributes to SEO in established e-commerce. Local businesses may differ: adjust it if you know.
Additional traffic: we only count new visits above your current traffic, which stays constant.
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