The IAB's ad-spend total is a compiled estimate, not a receipt

The test

On 20 November 2025, the Interactive Advertising Bureau published its 2025 Creator Economy Ad Spend & Strategy Report, an annual accounting of US brand spend on creator content. The report states US creator ad spend is projected to reach $37 billion in 2025, up 26 percent year over year, following a rise from $13.9 billion in 2021 to $29.5 billion in 2024. IAB also reports that 48 percent of surveyed ad buyers now call creators a 'must buy', ranked just behind paid search and social media. IAB describes itself, on its own homepage, as a trade body of more than 700 member companies in digital advertising and media, a detail relevant to how this figure was assembled.

What the evidence says

The published landing page states the headline totals and a set of takeaways, including that identifying the right creators remains buyers' top challenge and that three in four brands plan to use AI for creator-marketing tasks. What the page retrieved on 16 September 2026 does not disclose is a public sample size, a list of respondent companies, or a fielding window, details usually confined to the gated full PDF. That gap matters: an ad-spend total attributed to 'IAB' can describe either a bottom-up survey of media buyers' stated budgets or a top-down model extrapolated from a smaller panel, and the public page does not say which. The trade-association structure noted on IAB's own site is also relevant, since a figure compiled by an association of the companies doing the spending is not the same evidentiary class as a ledger held by an independent auditor.

The sample and the variance

The $37 billion and $44 billion figures cover US creator advertising only, as tracked by IAB across its member and partner network, and they measure ad-spend intent or allocation as reported to IAB, not verified invoices. The 48 percent 'must buy' figure describes ad buyers' stated attitude, not a purchase record. None of these figures should be read as a government-style count of every dollar paid to every creator, nor as evidence that any individual creator's income is rising at the aggregate market's 26 percent rate.

What to try next

A publisher or marketer citing this report should attribute the figure to IAB's survey methodology by name, rather than presenting it as a neutral market fact, and should note the platform or format mix is not broken out on the public page. This is an editorial suggestion, not a guarantee that any campaign will match the sector average.

• Does the cited figure come from IAB's public summary or the gated report, and does the full report disclose a sample size?
• Is the reported spend growth a measured total or a projection built on a subset of surveyed buyers?
• Does the platform or content format matter to the figure being cited, and does the summary say so?

Read as a trade association's survey of its members' stated ad budgets, the report is a useful directional signal about brand appetite for creator content. Read as an audited market census, it claims more precision than its own public page supports.