US CTV upfront spending to hit $17.73 billion, overtaking linear primetime

The projected flip in spending dominance from linear to CTV signals a permanent shift in how major brand budgets are allocated during the upfront cycle. As US CTV upfront spending scales, the industry must move away from manual reporting and siloed measurement to avoid inefficient attribution. This transition forces a technical evolution toward interoperable data layers that can reconcile streaming exposure with search and social performance. For the broader ecosystem, this means the competitive advantage will shift to platforms that offer transparent incrementality metrics over those relying on proprietary 'black box' reporting. Watch for increased adoption of API-driven measurement tools as buyers demand a single source of truth for cross-platform ROI.

EMARKETER's projection that US CTV upfront ad spending will reach $17.73 billion in 2026 represents a structural inflection point in how television advertising budgets are allocated. At EMARKETER's Ad Buyer Strategies summit in May 2026, analyst Ross Benes described the crossover as "a pretty substantial" tipping point for the television industry, noting that primetime linear TV is "the genesis of the upfront" and that the shift carries symbolic weight beyond the dollar figures. Benes also observed that ad pricing on streaming inventory is trending "flat to declining" as ad supply expands across ad-supported tiers, with the exception of live sports where scarcity commands premium rates.

The budget migration EMARKETER documents is not merely a forecast but is already reflected in advertiser behavior. A study commissioned by Premion found that 70% of US advertisers plan to increase CTV investments by an average of 17% in 2026, with the majority of that funding reallocated from linear TV, digital display, paid search, and social media. The same research found that four in five advertisers confirm combining linear TV with CTV boosts brand awareness and ROI more effectively than either channel alone, yet persistent fragmentation across walled gardens remains the primary obstacle to managing frequency and deduplicated reach.

EMARKETER's broader Q2 2026 Digital Video Forecast frames the upfront crossover within a longer sequence of milestones. The report notes that streaming is on track to account for the majority of video subscription revenue, and that as inventory becomes digitally transacted rather than manually negotiated, buyers will increasingly demand outcomes-based measurement. Benes identified a progression: viewership shifted first, then time spent, then subscriptions, and now ad spending is following, with ad impressions expected to be the final metric to tip toward streaming.