The Interactive Advertising Bureau has released its 2026 Outlook Study, and the message is blunt. Advertising budgets are growing again. The forecast calls for a 9.5% increase in U.S. ad spend year over year.
This growth comes from digital channels, large-scale media events, and a deeper reliance on agentic AI systems that plan, activate, and adjust campaigns with minimal human intervention.
The study draws on feedback from more than 200 brands and agency buyers. Their answers point to a market that has moved past testing AI and now expects it to carry real weight.
AI Moves From Experiment to Infrastructure
AI now sits at the center of marketing priorities. Five of the top six focus areas for 2026 are tied directly to AI-driven activity.
That list includes autonomous media buying, automated campaign execution, predictive measurement, creative alignment with AI-generated answers, and cross-platform reporting.
This shift marks a clear break from earlier years. AI is no longer treated as a side project. It has become a core operating layer.
Agentic AI Takes the Lead
The report highlights strong momentum behind agentic AI. These systems act with a degree of independence, adjusting bids, pacing budgets, and reallocating spend based on live signals.
Two-thirds of buyers now focus on agentic AI for ad buying and execution. That level of adoption signals trust. It also signals dependency.
AI now coordinates media decisions in real time. Human teams set the guardrails. Machines handle the repetition.
Measurement Catches Up
As automation increases, scrutiny follows. Cross-platform measurement rose to 72%, up from 64% last year.
Advertisers want proof. They want visibility. They want to connect automated decisions to business outcomes.
This demand has pushed measurement tools into the spotlight. Attribution, clean rooms, and identity resolution now play a larger role in day-to-day planning.
Digital Channels Drive the Numbers
Digital advertising continues to outpace the broader market. Social media is projected to grow 14.6%. Connected TV follows at 13.8%. Commerce media comes in at 12.1%.
These channels align closely with performance goals. They also benefit most from AI-based targeting and optimization.
Digital has become the primary engine for budget growth.
Linear TV Gets a Temporary Lift
Linear television still trends downward, with a projected decline of 1.7%. That drop is slower than in prior years.
Major events help explain the pause. The Winter Olympics, the FIFA World Cup, and U.S. midterm elections are expected to pull in viewers and advertisers alike.
These events act as shock absorbers. They slow the fall but do not reverse it.
Buyer Priorities Shift From Reach to Return
The study shows a change in how marketers define success. Customer acquisition remains the top objective at 54%, yet that figure dropped ten points year over year.
Repeat purchases now claim more attention. Twenty-five percent of buyers list retention as a primary goal, nearly double the figure from 2024.
This reflects cost pressure. It also reflects better data access.
Retention Gains Efficiency
Agentic AI systems handle audience planning, pacing, and optimization with greater consistency. That efficiency benefits retention programs.
Loyalty platforms, CRM onboarding, and commerce media now operate at scale. These systems reach millions of known customers.
Repeat purchase has shifted from support tactic to growth engine.
New Challenges Surface
Growth brings friction. Adapting to changing consumer behavior now ranks as the top investment challenge, cited by 44% of buyers.
Another pressure point is generative AI literacy. Thirty-eight percent of respondents cite it as a major hurdle, up fourteen points since 2024.
Marketers know AI matters. Many still work out how to apply it with confidence.
What the Outlook Signals for 2026
The IAB study paints a market that feels optimistic yet cautious. Budgets rise. Expectations rise faster.
AI systems now coordinate media, measurement, creative, and customer experience. Digital channels absorb most new spend. Retention gains status as a growth strategy.
For advertisers, 2026 looks less like a reset and more like a new operating norm. The tools are in place. The pressure is real. The margin for error keeps shrinking.