SEO ROI calculator for UK SMEs
SEO is a long game, so it helps to know what the upside could be worth before you invest. Enter your current organic traffic and conversion numbers, a realistic traffic uplift, and your monthly SEO budget, and this estimates the extra enquiries, sales and gross profit, and where the spend breaks even.
How it works
The model takes your current organic visits and applies your website conversion rate to estimate the enquiries you get now. It then grows the visits by your target uplift, works out the extra enquiries that produces, and turns those into sales using your enquiry-to-sale conversion rate.
Each extra sale is worth its gross profit, not its full price, so the model multiplies the additional sales by your average sale value and your gross profit margin. The break-even line is simply the point where your monthly SEO spend equals the extra gross profit: spend less than that and the work pays for itself at this uplift.
How to use the result
Treat this as a planning sketch, not a promise. The most useful move is to flex the inputs: try a smaller, more conservative uplift, then a larger one, and see how quickly the gross profit clears your spend. If it only works at an uplift you doubt you can hit, that is a useful warning before you commit a budget. If a modest uplift already covers the cost, the case is stronger.
SEO results are not guaranteed or predictable. This is a planning model based on your own assumptions, not a ranking forecast. Traffic uplift depends on competition, content and many factors outside any tool.