Costco: Why Customers Drive Past Other Stores
How membership, value, scarcity, gas, and a regional catchment support warehouse-scale retail
Brand Learning · Location Changed Everything · Case 13 · Collection I · Prepared October 2026
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Costco expands the practical trade area by making the trip economically meaningful. Membership, limited assortment, large baskets, fuel, and trusted value let fewer warehouses serve broader territories than ordinary supermarkets or general merchandisers.
The location decision
A Costco warehouse is intentionally unlike a convenience store. The company’s 2025 annual report describes an average warehouse of roughly 147,000 square feet and an assortment of fewer than 4,000 active stock-keeping units—tiny compared with the number offered by many broadline retailers. The trade is depth for breadth: high-volume items, limited choices, low markups, and frequent treasure-hunt changes.
Membership alters the geography. A household that has paid for access has a reason to consolidate spending. Large package sizes and predictable value increase the basket enough to justify a longer drive. Fuel, pharmacy, optical, hearing, food, and other services allow customers to combine errands. The store becomes a planned regional trip rather than an emergency neighborhood purchase.
Costco’s real-estate leadership has described trade areas that can range from roughly twenty minutes in dense urban markets to several hours in sparsely populated regions. The company compares prospective markets with existing warehouses while considering household income, population, traffic, access, and cannibalization. The same prototype therefore serves very different geographic shapes.
Scale creates demanding site requirements. The building, parking, truck circulation, and fuel operation consume substantial land. Peak weekends can strain roads and entrances. In fiscal 2025 Costco reported $269.9 billion in net sales and 914 warehouses worldwide, including 15 in Australia. The relatively modest unit count compared with store-based retailers is part of the model: each location is expected to command a large territory.
The strategic model
Trip justification
The expected basket, savings, exclusivity, and bundled services compensate for a longer journey.
Membership gravity
Paid membership creates commitment and repeat behavior that ordinary distance models may understate.
Regional catchment
A warehouse draws across municipal boundaries, especially where alternatives are limited.
Capacity and access
Parking, fuel queues, freight, turns, and surrounding roads determine how much regional demand the site can process.
What the strategy got right
It created a value proposition strong enough to expand customer travel tolerance.
It uses a disciplined, limited assortment to support high inventory turns.
It combines multiple trip purposes in one destination.
It evaluates new warehouses against the existing network, not as isolated stores.
Where the model can fail
A large affluent population does not guarantee a viable site if access, parcel geometry, entitlement, and traffic capacity fail.
The required land and construction create substantial fixed exposure.
New units can cannibalize established warehouses even when the total region grows.
Gas and automotive traffic add environmental, congestion, and community considerations that must be addressed directly.
The impact
Costco demonstrates that distance tolerance is a brand outcome, not a universal constant. Customers will bypass closer alternatives when the expected value of the trip is distinctive and reliable. The location model must therefore measure both geographic friction and the strength of the reason to overcome it.
Questions for leaders and franchise consultants
How far do existing members travel, and how does that vary by market density?
Which household segments can support membership and large baskets?
What other errands or services does the destination combine?
How will a new warehouse redistribute members and sales across the network?
Can roads, fuel access, parking, deliveries, and peak queues support the catchment?
Applying the lesson with Wanderland
Wanderland can define a Costco-like regional customer profile, compare large drive-time markets, map existing units and competing destinations, evaluate household economics, and estimate overlap. For franchise and retail planners, the broader lesson is to make travel tolerance a brand-specific variable instead of accepting a generic radius.
Research sources
Independent educational analysis. Company names identify the subjects of the stories; no endorsement or affiliation is implied. Historical results retain their stated source periods.
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