C
Evidence Grade C
Use with Hedging
Current
9.5%
9.5% -- ad spend growth rate for US advertising expenditure (2026)
Attribution:
View source
Lighthouse Research Team
Last verified:
·
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Source verified
Evidence graded
Value
9.5%
Unit
Percentage
Data Vintage
2026
Entity
Evidence Quality
C
Moderate quality evidence
Useful directional data with some methodological gaps. Treat as indicative rather than definitive -- corroborate before citing in formal research.
Score breakdown
Extraction
95
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Sources (3)
Interactive Advertising Bureau (IAB)
Primary
Tier A
https://www.exchangewire.com/blog/2026/02/02/digest-iab-forecasts-9-5-us-ad-spend-growth-in-2026-ope… ↗
Source Article
Digest: IAB Forecasts 9.5% US Ad Spend Growth; OpenAI Eyes $40bn Funding; Nine Sells 2GB & 3AW to Arthur Laundy - ExchangeWire.com
Digest: IAB Forecasts 9.5% US Ad Spend Growth; OpenAI Eyes $40bn Funding; Nine Sells 2GB & 3AW to Arthur Laundy
by News
on 2nd Feb 2026 inIn today’s Digest, we cover the IAB forecasting 9.5% US ad spend growth in 2026 driven by digital and agentic AI, OpenAI eyeing USD$40bn (£29.6bn) in funding from…
Also cited by
globenewswire.com
https://www.globenewswire.com/
2026-08-18
digiday.com
https://digiday.com/
2026-08-18
Original Research
Interactive Advertising Bureau (IAB)
· Original study ↗
Methodology
Based on insights from more than 200 brands and agency buyers
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Suggested hedging: According to limited, single-source data, based on claims without stated methodology, with unverified sample sizes...
Plain Text
US advertising expenditure: 9.5% ad spend growth rate. Source: Interactive Advertising Bureau (IAB) (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/iab-us-ad-spend-growth-2026
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<blockquote cite="https://lighthousedata.io/data/iab-us-ad-spend-growth-2026" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>9.5%</strong> -- ad spend growth rate for US advertising expenditure<br><small>Source: Interactive Advertising Bureau (IAB) (2026) · <a href="https://lighthousedata.io/data/iab-us-ad-spend-growth-2026" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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