WPP forecasts AI search ad revenue to top $100 billion by 2030

WPP Media’s midyear forecast puts a hard number on what many marketers have treated as an experiment: AI search is becoming a budget line item. The firm projects global advertising revenue will reach $1.3 trillion in 2026, with generative search set to rise from $5.1 billion that year to more than $100 billion by 2030. WPP Media calls AI the 21st century’s Gold Rush, and the scale of that projection shows why discovery in AI interfaces is starting to look less like a SEO side project and more like paid media.

The forecast also shows how much money is already in motion. WPP Media says global ad growth in 2026 will reach 8.9%, up from its December 2025 view of 7.1%. In the United States, ad revenue is expected to hit $483.4 billion, excluding political spending, with growth of 11.9%. That surge matters because the U.S. remains the largest engine of ad demand and the clearest test market for how fast spend can shift from classic search into AI-driven discovery.

For search marketers, the most important signal is that generative search is no longer a rounding error. WPP Media says it will account for about 0.4% of total advertising revenue in 2026, while traditional search and generative search together will make up 21.8% of total advertising revenue. That combination suggests the next fight is not just about ranking well in AI answers, but about whether the surfaces that shape those answers can be monetized, measured, and sold with the same discipline as other performance channels. The platforms racing to build monetizable interfaces are, in effect, laying the groundwork for a new ad market around discovery, intent, and conversion.

The concentration of power in digital advertising makes that shift even more consequential. WPP Media says the top three sellers outside China, Alphabet, Meta, and Amazon, control 57.6% of the market, while traditional media owners are absent from the global top ten. That leaves marketers facing a market where the companies controlling discovery are also best positioned to sell the inventory around it.

WPP Media adds one more warning sign for anyone still treating this as a temporary test: ad revenue as a share of global GDP is set to hit its highest level since 1999. In a year defined by geopolitical, economic, and consumer sentiment headwinds, AI is not just lifting the ad market, it is reshaping where the next durable spend will go.