Robbie Thain
Founder, CEO
AI-generated illustrative image. Not an official campaign image.
YouGov data shows the Gen Z value gap between Costco and Aldi narrowed in 2026. Experiential marketing teams must test retail sampling to prove sales impact.
On September 21, 2026, YouGov released research comparing the perceived value of Costco and Aldi. MediaPost subsequently covered this report, highlighting a notable change in retail sentiment. The core finding focused on a distinct shift in how younger consumers view these two grocery operations. Between January 1 and August 31, 2026, the perceived value gap between Costco and Aldi narrowed significantly among Gen Z respondents. This data point forces consumer packaged goods teams to evaluate where value oriented younger shoppers encounter their products. Marketing operators must now consider how this perception influences where they prioritize sampling, trial, and retail engagement programs.
The underlying research tracks consumer perception rather than actual purchase behavior or sales volume. YouGov defines its Value score using daily surveys that ask United States adults whether a brand offers good or poor value for money. The polling company explicitly distinguishes good value from simply being cheap. These net scores are derived from daily U.S. adult surveys and presented as an eight week moving average.
The published article does not provide sample counts, confidence intervals, or statistical significance testing for the comparisons. Without this underlying statistical detail, marketing teams should be cautious about treating these score movements as definitive proof of a demographic migration.
The Gen Z trend moved considerably within the studied period. On January 1, Costco held a Gen Z value score of 46 while Aldi sat at 27. Costco saw its score rise to 51 on June 7 before falling to 38 by August 31. During that same final measurement week, Aldi saw its score rise to 33.
This volatility demonstrates that consumer sentiment is rarely static over an eight month period. Despite the gap closing, Costco still maintained a 12 point lead over Aldi among Gen Z for the full January through August 2026 period. The average scores for those eight months were 44 for Costco and 32 for Aldi. A 12 point lead indicates significant remaining strength for the warehouse model among younger buyers.
The generational pattern across the YouGov data is not uniform. Across United States adults overall, Costco scored 38 and Aldi scored 35 on perceived value. Costco led among Millennials with a score of 43 against a score of 34 for Aldi. Meanwhile, Aldi edged out Costco among Gen X respondents with a score of 35 compared to 33.
The two retailers tied with scores of 37 each among Baby Boomers and older shoppers. This fragmentation suggests that household composition and generational spending habits heavily influence how value is perceived at different stages of life.
Customer base estimates provide further context for these value scores. YouGov Profiles estimates that adult Gen Z Americans account for 18 percent of current Costco customers. The same data estimates this demographic makes up 13 percent of Aldi customers. YouGov says these customer share estimates use rolling survey responses collected from September 2025 through September 2026.
Costco operates with massive scale that brand teams must consider when planning retail reach. The retailer reported fiscal 2026 net sales of $297.2 billion. Costco stated it operated 939 warehouses, including 647 in the United States and Puerto Rico. This physical footprint makes the warehouse club a primary target for physical brand activations and product demonstrations.
We look at perception data as a signal to investigate rather than a mandate to abandon proven channels. A narrowing value score does not mean Gen Z has migrated their spending from Costco to Aldi. Experiential and shopper marketing leaders must validate retailer specific audience data with actual sales figures before reallocating their budgets. Brands that shift resources based solely on perception surveys often lose their footing in physical retail spaces.
Our standing rule is clear: keep scorecards tied to observed execution and outcomes. We specialize in creating retail demos, product sampling programs, and roadshows that bring brands face to face with their audiences. Each program is designed to drive trial, build consumer relationships, and accelerate retail velocity across multiple locations. If a brand targets younger shoppers, marketing operators should test physical activations in specific retail environments.
This controlled testing reveals which retailer produces higher trial and documented sell through. Relying on transaction volume instead of general survey data prevents field operations from becoming disorganized. The field data we collect during these activations provides a clear roadmap for future resource allocation. When you map actual product movement to specific retail environments, the demographic debate shifts from abstract perception to concrete sales pipeline.
We managed a four-week, multi-market Costco sampling program for Pulmuone's PlantSpired line. The program delivered more than 65,000 samples and recorded an 18 percent sold to sale rate, giving us a concrete example of how structured retail sampling can connect trial with purchase. We design mobile activations and roadshows that accelerate consumer trial, build trust, and boost retail velocity during 90-day product launch windows. Our structured approach transforms initial product trial into sustained consumer confidence and retail performance.
A VP of Marketing reflected on our partnership: 'Robbie, it was a pleasure working with you and your team. You turned our launch into an experience that connected with shoppers and built lasting excitement for our brand. We're already looking forward to the next project together.' Our team created a launch experience that resonated with retail shoppers and generated momentum for future collaborations.
When demographic preferences appear to shift, the immediate operational impact hits field marketing allocations. Marketing directors must decide whether to adjust their staffing models to accommodate different store formats. A warehouse activation requires managing high volume inventory, securing specific permits, and maintaining consistent brand ambassador energy over long shifts. Operating within a smaller grocery environment demands a completely different approach to physical footprint and traffic flow.
Managing logistics properly is the difference between generating pipeline and wasting product. Teams must connect consumer data directly to their Costco roadshow execution frameworks to ensure they reach the right buyers. If a brand tests a new retail partner, the operational load on the field marketing manager doubles immediately. Field teams have to build separate training protocols for brand ambassadors at each retailer.
We store your sampling product and event gear, then ship, track, and coordinate delivery nationwide so every activation stays on schedule. This bifurcated approach strains experiential marketing budgets if not managed carefully. To maintain efficiency, brands need a structured process for bridging their trade show presence with localized roadshows regardless of the specific retail partner. Evaluating performance on a per store basis provides the exact data needed to justify these operational costs.
We manage end to end Costco roadshows that bring brands to shoppers through live demos, real conversations, and measurable sales impact.
Capturing data accurately at the point of trial is critical for proving Return on Investment. Without a strict reporting framework, consumer interactions fail to translate into usable pipeline metrics. We turn audiences into participants with live and digital experiences that invite people to try, share, and act. Our systems route this engagement data directly into client CRM platforms for immediate follow up.
Retailers demand strict commercial measurement for physical footprints. Converting casual engagement into documented transaction volume becomes the primary operational mandate for any CPG brand. This requires trained brand ambassadors who understand how to guide a conversation toward a purchase decision. When execution is flawless, the resulting data provides a much clearer picture of demographic preferences than broad national surveys.
As consumer perception continues to evolve across major retailers, successful brand operators must rely on hard data from the field. Relying on perception surveys to guide field execution introduces unnecessary risk into your marketing budget. When consumer sentiment changes, the most resilient brands double down on tracking measurable physical engagement. The next time a polling firm releases a report on shifting generational values, marketing leaders should treat the headline as a hypothesis rather than a conclusion. Are you tracking your retail demo performance closely enough to prove which store environment actually converts your target demographic into loyal buyers?
Once marketing directors select which retail environments to test against demographic data, designing physical spaces that capture shopper information becomes the next immediate step. To solve inefficient post event follow up and CRM routing, Makai plans and manages trade show spaces that attract attention, start conversations, and convert visitors into customers.
30 Years Experiential & Retail Activation Partner for CPG & Beverage Brands | Multi-Market Demos, Roadshows & Costco/Club Programs That Actually Sell
