How to work out what AI search is worth to you

What does ROI mean for GEO?

ROI (return on investment) is what you get back for what you spend. For GEO (Generative Engine Optimization, getting AI answers to name your business) it's the extra profit from buyers who found you through AI, compared with what the work costs.

It matters because buyers now ask AI. In BrightLocal's 2026 survey of 1,002 US adults, 45% had used ChatGPT or another AI tool for local business recommendations, up from 6% the year before.

The hard part is the first half: nobody sends you a bill that says "this client came from ChatGPT". So you estimate it, then check the estimate once the work is running.

What five numbers do you need?

1. Leads a month. Calls, forms and booking requests from real buyers.
2. Close rate. The % of those leads that become clients.
3. What one new client is worth. The money from their first purchase.
4. Profit margin. How much of each dollar you keep.
5. How often AI names you now, and how often it could. This is the one you can't read off a report. Our calculator estimates it from your AI score. You can also measure it by asking AI tools your buyers' questions many times and counting how often you're named.

How do you work it out, step by step?

1. Leads from AI today. Not all of your leads. If AI rarely names you, few of them came from it. We weigh the buyers who ask AI by how often you're named, against a middle rate for everyone else.
2. Extra AI leads. AI leads today × (how often you'd be named ÷ how often you're named now − 1).
3. Extra clients a year. × 12 × your close rate.
4. Added revenue. × what one client is worth.
5. Added profit. × your margin.
6. Year one. AI tools don't update overnight. We count year one as 75% of a full year (a straight six-month ramp).
7. Return. Year-one profit ÷ what the work costs for a year.

What does it look like for a real business?

Here are the calculator's starting numbers for a law firm: 40 leads a month, 20% close rate, $8,000 per client, 40% margin, 30% of buyers asking AI first, AI score 40 raised to 80.

The rates for how often AI names a business, the middle rate and the ramp are our own estimates. The plan price is our published price, read 24 September 2026. Try it with your own numbers on the law firm calculator.

What mistakes make the answer too big?

• Counting all your leads as AI leads. If AI rarely names you today, only a small share of your leads came from it.
• Counting year one as a full year. Results build over months.
• Using revenue instead of profit. A $100,000 gain at a 20% margin is $20,000 you keep.
• Forgetting your competitors. If a rival fixes their site first, your share can drop.

Our calculator avoids the first two by design, shows profit next to revenue in its report, and caps the result at 25% of your yearly revenue.

How do you check the estimate once the work starts?

• Look at AI referrals in your analytics. Visits from chatgpt.com, perplexity.ai and gemini.google.com show up as referrers.
• Ask every new client how they found you, and add "ChatGPT or another AI tool" as an answer choice.
• Track the questions. Ask the AI tools your buyers' real questions every month and count how often you're named. That's what our Prompt Tracker does.

Then put your real numbers back into the AI Revenue Calculator.

Sources

1. Local Consumer Review Survey 2026 — BrightLocal. Read Sep 24, 2026.
2. AI Syndicate pricing — AI Syndicate. Read Sep 24, 2026.