Sponsored Brands in 2026: bid for new-to-brand, not ACoS.
Judging Sponsored Brands on ACoS throttles the exact spend that builds your brand. Its job is acquiring new-to-brand customers and growing branded search — outcomes ACoS cannot see. The metric set that actually fits the ad type, including the Rufus shift.
Sponsored Brands should not be judged on ACoS. Its job is to acquire new-to-brand customers and grow branded search — outcomes that ACoS cannot see. If you optimise your SB campaigns on the same efficiency ratio you use for Sponsored Products, you will throttle exactly the spend that is building your brand. Here is the metric set that actually fits the ad type in 2026.
What is Sponsored Brands actually for?
Sponsored Products captures existing demand — someone already wants the product, you win the click. Sponsored Brands does something different: it puts your brand, your logo, and a multi-product story in front of shoppers at the top of high-intent searches, and increasingly in front of people who do not yet know you. Measuring that on last-click ACoS is like judging a billboard by counting the people who pulled over to buy on the spot.
The metric that matters: new-to-brand
New-to-brand (NTB) order volume and percentage measure the share of ad-attributed orders coming from shoppers who have not bought from your brand in the prior 12 months. It is the most direct signal that your customer base is actually expanding rather than just churning existing buyers through paid placements.
A Sponsored Brands campaign with a "mediocre" 30% ACoS but a 60% new-to-brand rate may be the most valuable line in your account — it is buying customers, not just orders.
The second signal: branded search trend
Branded search volume is a proxy for whether your SB investment is building durable recognition. If branded searches are trending up quarter over quarter, your top-of-funnel advertising is creating demand that later converts organically — the cheapest sales you will ever make. If branded search is flat while SB spend climbs, you are renting attention, not building a brand.
How to structure SB measurement in 2026
- Separate the P&L. Do not pool SB and SP into one ACoS target. They do different jobs and deserve different scorecards.
- Lead with NTB%. Set a new-to-brand target per campaign. Judge efficiency against customer acquisition cost, not last-click ACoS.
- Track branded search as a trend line. It is your lagging indicator that the top-of-funnel spend is working.
- Tie it back to TACoS. Brand-building should show up as falling TACoS over time as organic compounds. See ACoS vs TACoS.
Where Rufus changes the SB calculation
With Amazon's AI shopping assistant now mediating a meaningful share of discovery, brand context and use-case clarity feed the recommendations shoppers see. Sponsored Brands creatives that clearly state who the product is for and why are doing double duty — winning the placement and reinforcing the signals the AI uses to recommend you. More on that shift in how Alexa for Shopping is rewriting keyword strategy.
The takeaway
Stop asking Sponsored Brands to win on ACoS. Ask it to bring you customers you did not have and demand you did not have to pay for twice. Measure NTB and branded search, hold the whole account accountable on TACoS, and SB stops looking expensive and starts looking like the growth engine it is.
A profit model that prices each bid against total net profit — and can show why — keeps SB honest without flattening it to a single ratio. See how the agents handle full-funnel objectives, or watch it on your account.