SEO ROI Calculator

SEO ROI (return on investment) compares what search engine optimisation earns your business with what it costs. It is usually shown as a percentage: an ROI of 200% means every £1 spent on SEO came back as £3, the original £1 plus £2 on top.

Our calculator measures it on gross profit, so the figure shows what SEO adds after the cost of your products or services.

ROI (%) = (Gross profit from organic search − SEO investment) ÷ SEO investment × 100. Gross profit is your organic revenue × your gross margin, and SEO investment is everything you spend on SEO over the same period.

For example, £40,000 of gross profit from a £24,000 investment gives (£40,000 − £24,000) ÷ £24,000 × 100 = 67%. Every formula the calculator uses is in the formulas section.

Because revenue is not what you keep. Say SEO brings in £60,000 of sales at a 50% gross margin, and the campaign costs £12,000. On revenue, the ROI looks like 400%. On profit, you keep £30,000 of those sales, so the ROI is 150%.

Both are good results, but only the profit figure shows what SEO adds to your bottom line, which is the number that matters when you set a budget.

It tells you whether SEO is paying for itself, how it compares with other channels such as Google Ads and how much you can sensibly invest. Rankings and traffic matter, but neither pays the bills on its own. A forecast before you start also sets clear expectations for you and your agency.

Anything above 0% means SEO earned back more profit than it cost, and 100% means it doubled your money. There is no single benchmark, because margins, sale values and competition vary so much between industries.

A return measured on profit will always look lower than the revenue-based figures many calculators show, so compare like with like. The more useful question is whether SEO beats the other ways you could spend the same budget.

Google’s own guidance, in its video on how to hire an SEO, is that SEO usually needs four months to a year to show results. Our calculator reflects that: new visitors start slowly, reach about half their full level by month 6 and are close to full by month 9.

That is why the same campaign shows a higher ROI over 24 or 36 months than over 12. The early months carry the cost while rankings build.

Everything you spend to win organic traffic: your agency or freelancer retainer, SEO tools, content writing, link building and digital PR, developer time for technical fixes and the time your own team spends on it.

In the calculator, enter the monthly amount as your SEO retainer and any one-off spend, such as a website fix, as the upfront investment in Advanced mode.

They work differently. Google Ads brings visitors as soon as you pay and stops when you stop, so every click carries a cost. SEO takes longer to build, but the visitors it wins keep arriving without a cost per click, so the return tends to grow over time.

Many businesses use both: Ads for demand they need to win now, SEO for a lower cost per customer over the long run.

Rankings rarely disappear overnight. Pages that rank well often hold their positions for a while, then slip as competitors publish new content, earn links and improve their sites. How fast depends on your market. The calculator assumes the investment continues for the whole time frame you choose.

Yes. If the profit from organic search is less than you spend on SEO over the period, the ROI is negative and the calculator shows it in red. It is most common over short time frames, for new websites and for businesses with low margins or low sale values. Try a longer time frame, or see what a better conversion rate would change.

Business owners deciding whether SEO is worth it, marketers building a business case and anyone comparing SEO proposals. It works for service businesses that win enquiries, online shops and businesses that do both.

Yes. There is no sign-up and no email form. Results update as you type, and you can download them as a three-page PDF report: your result, the figures you entered and the full working.

Both use the same build-up, sales funnel and profit maths. They differ in how new visitors are estimated. Standard starts from your current traffic and the growth you aim for.

Advanced starts from search demand: the average monthly searches for your keywords × the click-through rate at the position you aim for. It also lets you add a one-off setup cost and compare the return at the top 10, top 3 and position 1.

Our free search visibility audit shows your monthly traffic from Google. If you use Google Analytics 4, go to Reports, then Acquisition, then Traffic acquisition, and look at Organic Search: the Sessions column counts your visits from Google. Use a monthly average from the last few months. If you only have Google Search Console, the monthly clicks in the Performance report are a close stand-in.

New website? Enter 0, and the calculator asks for the visitors you aim for instead.

Keyword tools such as Semrush or Google Keyword Planner show the average monthly searches for each keyword. Add up the keywords you want to rank for, in the country or area you serve. Keyword Planner is free with a Google Ads account, though it shows ranges rather than exact figures unless you are running ads.

Advanced mode uses Advanced Web Ranking’s click-through rate data for Google desktop results, July 2026: 20.02% for position 1, 11.42% on average across the top 3 and 3.98% on average across the top 10.

Your own rates can differ with ads, map results and AI Overviews on the page. If you know your click-through rate from Search Console, keep it in mind when you read the result.

Because most clicks go to the first few results. In the data we use, position 1 gets 20.02% of clicks, about five times the 3.98% average across the top 10. Moving into the top three often does more for your return than ranking for more keywords lower down the page.

Use your own figures if you have them: enquiries ÷ visitors for your services and orders ÷ visitors for your shop, both from Google Analytics. If you don’t, the example figures are a sensible starting point (3% of visitors getting in touch, 2% placing an order). Then try a lower figure to see how much your return depends on it.

Multiply what a customer spends per visit or purchase by how many times they buy in a year, then by how many years they usually stay. A salon client who spends £80 a visit, eight times a year, for three years is worth £80 × 8 × 3 = £1,920. If customers usually buy once, use your average sale value.

Gross margin is the share of each sale you keep after the direct cost of delivering it: materials, stock, delivery and the time spent on the job. Gross margin = (Revenue − Cost of sales) ÷ Revenue.

Your accountant or your profit and loss statement will have it. Not sure? 40% is a fair guess for many services and 45% for many shops.

The headline ROI covers all your visitors from organic search, the way most businesses report on the channel as a whole. The result also shows how much of the profit comes from the new visitors SEO brings, and the working lists it as incremental gross profit, so you can judge both.

Yes. Enter 0 as your current traffic and the calculator asks for the monthly visitors you aim for, with 3,000 as the example figure. They build up over the first year like any other SEO campaign, so a new website usually needs a longer time frame to show its full return.

The maths is exact: every figure follows from the numbers you enter, and the working shows each step. The forecast itself is only as good as those numbers and our assumptions, such as how quickly rankings build. Treat it as a planning estimate, not a guarantee, and run it with cautious figures as well as hopeful ones.

No. It covers visitors from Google’s organic search results. Visits from AI assistants such as ChatGPT, Perplexity and Gemini come on top. If you want to be named in AI answers too, see how our GEO service works.

Enter your figures without VAT. Customer value, order value and your SEO investment should all exclude it, and so do the results.

Pounds, US dollars, euros and UAE dirhams. Pick one from the list next to the mode switch. The maths is the same in every currency.

The calculator estimates what better rankings could be worth. Our free Search visibility audit shows where you stand today: your traffic from Google, how often AI answers link to you and what you could gain in the top three. Use the audit to find the opportunity and the calculator to put a value on it.

Three levers matter most: rank higher for the searches that bring buyers, convert more of the visitors you already get and raise what each customer is worth. Conversion is often the quickest. Lifting your conversion rate from 2% to 3% brings 50% more customers from the same traffic, and 50% more gross profit.

Set up Google Analytics 4 with conversions for your forms, calls and orders, connect Google Search Console and record which leads become customers in your CRM. Then compare the gross profit from organic search with your SEO costs each month.

Our clients get a live Data Studio dashboard that tracks it all, from traffic and conversion rate down to bookings and sales, split by source.

Yes. Tell us about your project and we’ll look at your traffic, rankings and competitors, then put real numbers behind this estimate: the keywords worth targeting, the positions within reach and what it would take to get there.