Unless you have an intimate knowledge of your local Costco’s layout, shopping in the popular warehouse supplier can sometimes feel like looking for a needle in a barn-sized haystack. That’s especially true when you have a specific item in mind, with Costco offering little help when it comes to navigating the store’s massive aisles.
While it might be frustrating trying to figure out which section holds the coffee, granola bars, or prebiotic soda you have at the top of your shopping list, there’s actually a very simple reason Costco chooses not to clearly label any of its warehouse aisles. And when you look at the logic behind its decision, it becomes incredibly apparent just how much thought Costco put into its members’ shopping experiences.
The shopping psychology behind Costco’s warehouse layout
When it comes to the larger grocery industry, most supermarkets traditionally label its aisles to help shoppers more easily navigate their stores, allowing them to locate the items on their lists without spending too much time aimlessly wandering around.
Costco, on the other hand, incorporates a less clear-cut layout. In effect, it forces shoppers to roam the aisles. Through this approach, customers sometimes stumble across items they might not have originally considered purchasing, whether it’s seasonal patio furniture, bulk packages of chips, or limited-time desserts returning to Costco’s bakery section.
In many ways, the experience encourages shoppers to adopt what MOJO Sales and Branding described as a “treasure hunt” mindset, leading to plenty of unplanned items winding up in their carts. “This element of discovery—the possibility of finding an unexpected deal, an unusually high-quality brand, or a limited-time item—is a cornerstone of Costco’s business strategy,” explains MOJO. “It is not accidental. It is engineered psychology.”
Why products constantly move around the warehouse
Of course, not everyone falls into the “treasure hunt” mode described above. In some cases, members may have a more intimate knowledge of their local warehouse layout, instantly heading toward the aisle that contains the items they’re looking for upon entering the store.
In these cases, Costco keeps visitors guessing (and roaming) by regularly shifting items around. With this strategy, even the most frequent Costco shoppers may find themselves exploring aisles they hadn’t ventured down before, ultimately stepping into the “treasure hunt” experience without even realizing it.
The longer you wander, the more you buy
More time means more temptation: Like most major retailers, Costco wants members to spend as much time as possible inside its warehouse. The longer shoppers wander the aisles, the more likely they are to grab something they never planned to buy.
Costco isn’t alone: According to a Journal of Marketing study, the more time shoppers spend in a store, the more likely they are to leave with potentially high-cost items in their cart (via Time magazine).
The end of the trip matters most: The study found that shoppers had a 10% higher chance of making big-ticket purchases near the end of a shopping trip, just before heading to checkout.
In plain English: The longer people shop, the more their self-control wears down—and the more likely they are to make impulse purchases because of all the products and deals they keep seeing.
Costco is built around discovery, not convenience
At the end of the day, Costco’s seemingly scrambled store layout is all part of the brand’s goal of getting shoppers to explore on their own, creating that signature “treasure hunt” feeling along the way.
That sense of discovery can also trigger a dopamine boost as shoppers come across new deals, discounted goods, or limited-time items during their trip. “When shoppers discover items they didn’t expect to find, dopamine—a neurotransmitter linked to reward—spikes,” MOJO explained. “Over time, customers associate Costco with the feelings of reward, surprise, and exploration.”
In the end, Costco turns an ordinary shopping trip into a surprisingly fun experience, with customers leaving not only with unexpected purchases, but usually a much fuller cart too.
