Does Schema Markup Help You Rank on ChatGPT? We Tested 1,000 Businesses.

Every GEO guide we've read says schema markup is important for AI search visibility. "Add LocalBusiness schema." "Implement FAQ structured data." "Use JSON-LD to help AI understand your business." It sounds reasonable. We tested it.

Across 1,000 businesses in our dataset, schema markup showed less than 5% correlation with appearing in ChatGPT's recommendations. Five percent. That's noise.

We checked every business for structured data -- LocalBusiness, Organization, FAQ, Review schema, all of it. The businesses ChatGPT recommends and the businesses it ignores have nearly identical schema adoption rates.

For accountants, it was actually inverted. ChatGPT's picks had less schema markup than the businesses it skipped. The accountants ChatGPT recommends tend to be well-known firms chosen for brand authority, not because their website has tidy JSON-LD.

The one exception: specialist schema types showed a small signal in specific categories. An HVAC business using HVACBusiness schema performed slightly better than one using the generic HomeAndConstructionBusiness type. But this was a case study observation, not a pattern across our full dataset. And "slightly better" is doing heavy lifting in that sentence.

Why doesn't schema matter? Because of how ChatGPT actually finds businesses. It sends a query to Bing's web search. Bing returns results. ChatGPT reads those pages and writes up its answer. At no point in this chain does ChatGPT parse your structured data. It's reading your page the way a person would -- looking at the text, the title, what you say you do.

Schema markup helps Google's rich results. It helps Bing's structured snippets. Those are real benefits. But the leap from "helps search engines display my info correctly" to "makes ChatGPT recommend me" doesn't have evidence behind it.

We're not saying to rip schema off your site. It's harmless and takes minutes to add. But if someone is charging you to "optimise your structured data for AI search," our data says that money is better spent getting listed on Checkatrade, linking your Facebook page on your website, or -- if you're one of the 47% without a website -- just building one.

The gap between schema markup adoption (nearly identical for recommended and ignored businesses) and having a website at all (+44 percentage points) tells the story. The basics dwarf the technical tweaks. Schema is a rounding error in the data. A website is the whole game.