What would SEO actually return for you?
Put in your visitors, conversion rate, average sale and margin. You get leads, sales, revenue and profit — before and after — plus the payback period on whatever you were thinking of spending.
Your numbers, not ours — nothing stored, nothing sent anywhere
Everything marked with an asterisk is needed for the calculation. Estimates are fine — you can change them and run it again.
What you are aiming for
Targets
Change any of these to model the impact. Leave one blank to hold it at your current figure. Enter a monthly investment to get ROI and payback.
Estimates only. Actual performance varies by market, seasonality and competition — and SEO does not deliver in month one what it delivers in month twelve.
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Every ROI calculator is built to sell something
Including this one. So here is exactly what it assumes, and where the assumptions break.
- It assumes the uplift happensPut in 30% more traffic and it will show you 30% more traffic. Nothing in the maths knows whether 30% is realistic for your market. That is the number to be sceptical about, not the arithmetic that follows it.
- It assumes traffic quality holdsExtra visitors are treated as converting at the same rate as your current ones. In practice, new traffic often converts worse at first, because you rank for broader terms before you rank for the buying ones.
- It ignores the lagSEO does not produce month one what it produces month twelve. The payback figure assumes the gain starts immediately, which it will not. Add three to six months to whatever it tells you.
- It is only as good as your close rateMost business owners guess this and guess high. If you do not know what proportion of enquiries become customers, find out before relying on any of this.
What the figures mean
- Extra profit, not extra revenueRevenue is the flattering number. Profit after margin and after what you are spending is the one that decides whether this was worth doing.
- Payback in monthsHow long before the extra profit covers the monthly investment. Under six months is strong. Over twelve, question whether the uplift assumption is realistic.
- Break-even extra leadsOften the most useful line. It tells you how many additional enquiries a month you need for the spend to wash its face — and that is a number you can judge against your own experience.
- ROI percentageThe headline, and the softest figure of the four, because it inherits every assumption above.
Check the conversion side first
The calculator makes one thing obvious: a small rise in conversion rate is worth more than a large rise in traffic, and costs less to achieve. If your site converts at 1%, doubling it is usually cheaper than doubling your visitors.
- Would I Buy From This Site?Twelve questions on whether visitors trust the site enough to enquire. Start here if your conversion rate is under 2%.
- SEO Health Score CheckerWhether the technical foundations can support more traffic.
- Competitor ComparisonWhether the traffic uplift you modelled is plausible against who you are competing with.
- All eight free toolsNo email, no signup, no trial.
Want us to pressure-test the assumptions?
The free audit tells you whether the uplift you modelled is realistic for your market — and if it is not, we will say so rather than take the work.