B2B teams need CTV test data for 2027 budget plans

Most B2B teams will wrap up their 2027 plans between now and Thanksgiving. If you don’t have your own CTV data by then, you’ll either drop the budget line or include a number you can’t back up, according to MarTech.

Run a test now

Run a narrow test now to learn what CTV costs against your actual accounts and whether the channel is worth funding next year. A test with the specific goal of producing planning inputs can answer four things before the plan closes.

Most teams guess at reach against their target account list, and the guesses are usually generous because a vendor’s addressable universe isn’t your reach. The cost to deliver against your ICP versus a general audience is the number worth carrying into a planning meeting. Plenty of teams find out in week three that their library doesn’t hold up when creative runs full-screen and unskippable. Website visit tracking from targeted accounts is the first honest signal CTV gives you, and it is directional, not conclusive.

Limits of a quarter-long test

Incrementality and payback are not achievable in 90 days. A test you can defend needs account-level randomization, a holdout suppressed across every line item, and enough conversion volume to reach significance. In B2B, with long cycles and a finite account list, it takes longer than a quarter.

Set expectations with finance about what the test can deliver: reach, cost, creative viability, and early site signal from target accounts. The incrementality work is for a 2027 project that this test can make possible.

Narrow test design

Ad loads are climbing. Prime Video doubled its ad load after launching its ad business in early 2024, and other platforms are following. Lighter ad loads were a big part of what justified CTV’s premium pricing. As those loads increase, streaming CPMs are flattening as supply grows.

The IAB’s 2026 Digital Video Ad Spend & Strategy report has CTV spend projected to grow 11% this year. In the same research, 43% of buyers expressed “somewhat to no confidence” in the quality of the inventory they’re buying, according to MarTech. A wide buy across a long tail of apps gives you a noisy result that takes months to read, and you don’t have months.