Why Costco’s Sample Strategy Is the Most Underrated Marketing Campaign Ever

In April 2022, Costco brought its sample stations back to warehouses nationwide after a 14-month pandemic pause, a return covered by TODAY, Taste of Home, and Adweek and greeted by members like the reopening of a favorite ritual. The demonstrations run through Club Demonstration Services, the specialist sampling operator that has staffed Costco warehouses for decades, and the small cup of food it hands out is one of the most efficient marketing tools in modern retail.

The scale around that cup is enormous. In fiscal 2024, ended September 1, 2024, Costco reported roughly $254 billion in revenue, collected $4.8 billion in membership fees, counted 137 million cardholders, and renewed 92.9 percent of members in the United States and Canada, figures documented in the company’s annual report and reported by Motley Fool and The Detroit News. Those renewals held virtually unchanged even after Costco raised membership prices for the first time in seven years, a sign of how much members value the experience of the trip itself.

The sample is central to that experience, and academic research backs its power. A study led by Jeffrey Dotson of BYU’s Marriott School, published in the Journal of Retailing and summarized by BYU, found that in-store sampling produces both an immediate sales lift and a sustained one that outlasts the event by many weeks. The case offers a marketing leader a masterclass in converting curiosity into purchase, and in earning a return that most advertising cannot match.

Trial That Lowers Risk and Speeds the Decision

The genius of a sample is that it replaces a promise with proof. A free bite answers the two questions that stall a purchase, flavor and texture, and it answers them with real experience rather than packaging or a claim. That direct proof compresses the decision from minutes of deliberation to seconds of confidence, which is exactly what a first-time buyer needs to say yes.

The evidence for that lift is dramatic. The Atlantic reported in 2014, drawing on data from sampling firm Interactions, that in-store demonstrations raised sales of beer by 71 percent, wine by more than 300 percent, and frozen pizza by as much as 600 percent, with cosmetics such as lipstick and mascara climbing more than 500 percent. Those figures are a decade old and remain among the most-cited public benchmarks for sampling, echoed across Inc. and Money Talks News. A taste turns a shopper who was merely curious into one who is ready to commit.

The marketing lesson: Direct product trial converts by replacing perceived risk with proof, because a customer who has experienced the product buys with confidence instead of hesitation.

The Point-of-Purchase Advantage

Costco pairs the taste with proximity. The sampled item sits on the same pallet or a nearby shelf, so the moment of interest and the moment of purchase collapse into one, and the product lands in the cart while the flavor is still fresh. Placing demonstrations along high-traffic aisles reaches members who are already in buying mode, which is the most efficient audience a marketer can address.

That adjacency also grows the basket. A member who stops for a sample often adds the item and a companion product, and across 137 million cardholders those incremental additions compound into meaningful revenue and a higher average order value. The warehouse format, with its wide aisles and high volume, keeps the cost per trial low while the number of conversions stays high, a combination that turns sampling into a conversion engine rather than a giveaway.

The marketing lesson: Trial delivered at the point of purchase lifts conversion and average order value, because the shortest possible path from interest to checkout is the one that sells.

Trust and the Power of Retail Endorsement

Every sample carries an implicit endorsement. When Costco offers a product for tasting, members read it as a signal that the retailer stands behind the item, and that borrowed credibility makes a shopper far more willing to try an unfamiliar brand. Costco frequently samples products from smaller companies, and a strong first taste can turn a warehouse discovery into a brand a member seeks out and recommends to friends, which is earned media generated one cup at a time.

Repeated exposure deepens the effect. A member who samples a product, buys it, and enjoys it at home returns with a reason to trust both the brand and the store that introduced them, and that compounding trust is the foundation of customer retention. The BYU research adds a striking dimension here: when one brand sampled, sales rose across the entire category, evidence that a good demonstration expands demand rather than simply shifting it.

The marketing lesson: Trial backed by a trusted retailer builds brand trust and loyalty, because a positive first experience under a credible banner converts a stranger into a repeat customer.

An Experience Worth Making the Trip For

Samples also transform the errand into an event. Tasting foods a member would rarely choose blind turns browsing into exploration, extends the length of the visit, and adds a social, sensory layer that keeps people coming back for the feeling as much as the products. A sampler’s quick suggestion about how to cook or pair an item adds genuine value and makes the product feel more useful the moment it enters the cart.

This is experiential retail in its most practical form. The in-person taste confirms what online reviews only describe, so a member who researched at home can settle the decision on the spot during the same visit. The trip becomes a reason to renew, which helps explain why nearly nine in ten members keep their cards year after year and why the customer experience itself functions as Costco’s most durable marketing.

The marketing lesson: An enjoyable, sensory customer experience lengthens visits and strengthens loyalty, turning a routine trip into a habit worth renewing.

The Return That Advertising Struggles to Match

Sampling earns its keep because it is measured at the register. Where a radio spot or a display ad raises awareness and hopes for a downstream sale, a demonstration produces a live conversion a marketer can count in real time, alongside the repeat purchases that follow. The BYU study framed sampling as a roughly $2 billion annual investment across retail and found it outperformed end-of-aisle displays, whose effect faded after about two weeks while the sampling lift persisted for many more.

The discipline behind the spend is precise. The BYU researchers identified a clear profitability threshold: a sampling event stays profitable as long as its cost holds below roughly 15 times the unit price of the product, a rule that lets a marketer size the investment against the margin. Tracking conversion during the event, the lift that follows, and the repeat-purchase rate afterward gives sampling a measurement framework as rigorous as any performance channel, which is why it belongs in a modern marketing budget rather than at its margins.

The marketing lesson: Sampling delivers measurable return because it converts at the point of sale and sustains that lift for weeks, giving a marketer a clear, trackable cost per incremental sale.

The Broader Takeaway

Costco’s sample table is a working model of the metrics a CMO already tracks. Trial and proximity map to conversion and average order value. Retail endorsement maps to brand trust and customer retention. The enjoyable trip maps to loyalty and the customer lifetime value locked in by a 92.9 percent renewal rate. And the register-level measurement maps to the disciplined return that justifies a line in the budget. Read together, $254 billion in revenue and a renewal rate near 90 percent describe a customer experience engineered to convert and to keep converting.

The thinking travels well beyond the warehouse floor. Any brand that can put its product, or a taste of its service, directly into a prospect’s hands, whether through a free trial, a demo, a tasting, or a sample-size offer, can borrow the same logic: lower the risk, shorten the path to purchase, and let real experience do the persuading. The channel changes; the principle holds.

Related reading

• The Secret Behind Starbucks’ Digital Loyalty Loop That Keeps Customers Coming Back
• Customer Lifetime Value Isn’t Just a Metric, It’s a Budgeting Philosophy
• From Spend to Scale: Building a Marketing Budget That Can Grow With You

References

1. TODAY, “Costco’s free samples are coming back soon,” https://www.today.com/food/when-will-costco-s-free-samples-return-t182727
2. Adweek, “Costco’s Free Samples Are Returning,” https://www.adweek.com/commerce/costcos-free-samples-are-returning-even-though-samplers-may-not/
3. Club Demonstration Services, “About CDS,” https://clubdemo.com/about-cds/
4. Costco Wholesale, “2024 Annual Report (fiscal year ended September 1, 2024),” https://s201.q4cdn.com/287523651/files/doc_financials/2024/ar/COST-2024-Annual-Report.pdf
5. The Motley Fool, “Costco Sales Topped $250 Billion in Fiscal 2024,” https://www.fool.com/investing/2024/12/01/costco-sales-250-billion-fiscal-2024-member-fee/
6. The Detroit News, “Costco tested members with higher fees. The results are in,” https://www.detroitnews.com/story/business/retail/2025/10/18/costco-tested-members-with-higher-fees-the-results-are-in/86769123007/
7. The Atlantic, “The Psychology Behind Costco’s Free Samples” (citing Interactions), as summarized by the Association for Psychological Science, https://www.psychologicalscience.org/news/the-psychology-behind-costcos-free-samples.html
8. Inc., “Give it Away Now: Why Free Product Samples Always Pay Off,” https://www.inc.com/ilan-mochari/costco-sampling-free-food-giveaway.html
9. Money Talks News, “Here’s Why Your Warehouse Club is Giving Out Free Samples,” https://www.moneytalksnews.com/heres-why-your-warehouse-club-is-giving-out-free-samples/
10. BYU News, “Study: Free samples increase sales, work better than end-aisle promotions” (Journal of Retailing), https://news.byu.edu/news/study-free-samples-increase-sales-work-better-end-aisle-promotions
11. BYU Marriott School of Business, “Free Samples Increase Sales,” https://marriott.byu.edu/stories/faculty-research/free-samples-increase-sales

AI assisted in creating the content featured in this post and image.