Ad Market Grows 11.9% in 2026, but Three Channels Take Two-Thirds of the Money
The headline numbers say advertising is having an excellent year. The distribution tells a more complicated story, especially for publishers who sell on the open web.
What the forecasts say
WARC Media’s Global Ad Spend Forecast Q3 2026 expects global advertising spend to grow 11.9% to $1.34 trillion this year. Growth is forecast to ease to 8.4% in 2027 ($1.46 trillion) and 7.9% in 2028 ($1.57 trillion). WARC points to corporate AI investment and events such as the Olympics, the FIFA World Cup and the US midterm elections as drivers.
IAB’s September update raised its US forecast to 12.3% growth, up from 9.5% in January, after a stronger-than-expected first half.
Where the money goes
Three channels take two-thirds Social media, search and retail media will account for 66.4% of global ad spend in 2026, and WARC expects that share to reach 70% in 2028. Social leads with 21.3% growth to $394.6 billion, followed by retail media (+14.3% to $202.1 billion) and search (+14.2% to $295.7 billion).
Three companies take most of it Alphabet, Amazon and Meta are set to capture a combined 59.7% of global ad spend excluding China, equal to $659.6 billion. WARC notes that performance channels, which can adapt quickly to changing conditions, continue to benefit as uncertainty becomes the norm.
The open web tells a different story Madison & Wall’s forecast from December 2025 expected programmatic revenues tied to digital platforms and publishers to decline slightly in 2026, reflecting pricing pressure and uneven demand outside large-scale platforms. The same forecast saw programmatic across the whole open internet growing 4.4%, led by connected TV, digital out-of-home and audio. That forecast is almost a year old, so its numbers may have been revised, but the direction is a useful counterweight.
What it means for publishers
A growing market and a growing share are different things. When two-thirds of new money flows to a handful of channels, an independent publisher can sit in a record year and still see flat revenue.
That makes the controllable factors more important: how much each impression earns, which formats hold buyer attention and how many independent demand sources compete for your inventory. A bigger market doesn’t deliver demand to the open web by default. It has to be earned page by page.