Costco is quietly redesigning how warehouses run and how members check out, to sustain high-volume growth under tighter cost and trade constraints.
In Brief
- Warehouse expansion, relocations and remodels are being used to raise throughput in high-volume nodes without changing the core format.
- Checkout and pharmacy flows are being reengineered with digital and automation tools to lift capacity per square metre and per labour hour.
- Tariff volatility and sourcing shifts are being pushed upstream into procurement and private label control so that the warehouse stays a stable, low-friction node.
The Strategic Break: Scaling Volume Without Adding Friction
The recent disclosures from Costco describe more than another year of network growth. They point to a structural shift in how the company intends to scale volume: by redesigning the warehouse and checkout model so that more sales can be pushed through each node, while the network itself continues to expand.
The capital plan is explicit. CapEx of about $6.5 billion this year is directed primarily into three areas: a larger pipeline of new warehouses, remodels of existing high-volume buildings, and depot network expansion. Management is targeting roughly 30 new warehouses per year over a five to ten year horizon, with just over half in the United States and just under half across Canada, Mexico, Asia, Europe, Australia and New Zealand. At the same time, the company is relocating certain sites and upgrading the interiors of older warehouses.
This combination of new builds, relocations and remodels marks the strategic break. The objective is not simply more floor space; it is a higher-performance node that can handle sustained comparable sales growth in the 6 to 7 percent range without proportional increases in labour, congestion or working capital.
How The New Warehouse Model Is Being Built
The redesign rests on three operational pillars: network shape, in-building flow, and front-end throughput.
On network shape, Costco is committing to a steady build rate and a broader geographic footprint. The current estate stands at 924 warehouses worldwide, with 28 net new openings expected this fiscal year. Canada illustrates how the company is using both infill and time-based tactics. With 114 Canadian buildings and high volume per location, it has extended operating hours across all Canadian warehouses to relieve pressure rather than relying only on physical expansion. Internationally, the organisation acknowledges that development takes longer but still expects a good portion of new locations to be outside North America from 2027 onwards.
In operational terms, this kind of shift typically requires a more granular capacity plan by region and building. Node roles need to be differentiated: which warehouses act as primary volume sinks, which act as relief valves, and which are used to experiment with new layouts or mixed-use formats. Depot expansion is part of this. The company is enlarging its depot network to support warehouse replenishment and digitally enabled sales, which implies more regional cross-docking capacity and tighter inbound scheduling to keep high-volume buildings stocked without overloading backrooms.
Inside the building, flow is being modernised. Management describes ongoing upgrades to the interiors of older warehouses and more creative real estate solutions for new ones. In dense urban markets such as Los Angeles, the company is using parking decks and residential space above the warehouse to enter areas where a traditional 25-acre site is not available. This is not a new model for Costco in Asia and Europe, but it is newer in the United States and changes how goods and people move vertically through a site.
At network level, this is implemented through dock design, vertical materials handling, and revised slotting logic for high-velocity items so that volume can be handled across multiple levels without constraining throughput.
Where Checkout Becomes A Capacity Constraint
For a high-volume format, front-end flow is now as important as dock and aisle flow. Costco is explicit that it is redesigning checkout to remove this bottleneck. In-warehouse initiatives include mobile wallet enhancements, pharmacy pay-ahead, and the rollout of employee pre-scan technology. The company is also piloting automated pay stations with an average transaction time of around eight seconds, and reports that early results are improving traffic flow.
The pharmacy illustrates the mechanic. Pharmacy and food court delivered double-digit comparable sales growth in the quarter, with pharmacy traffic ‘significantly up’. Rather than increase headcount in line with that traffic, Costco is using digital pharmacy tools and pay-ahead capability to maintain existing staffing and still process higher volume. The same pattern is emerging at the main checkout: digital tools and automation absorb demand that would otherwise translate into longer lines and more labour.
In operational terms, this kind of shift typically requires redefinition of standard work at the front end, integration between point-of-sale, membership and payment systems, and tighter exception handling so that automated lanes do not stall. It also demands different labour planning, with hours shifted from transactional tasks to exception resolution and member support.
Benchmark activity elsewhere in retail points in the same direction. Walmart reports that sub-three-hour delivery orders grew more than 60 percent year-on-year, supported by stores acting as fulfilment nodes, and Sam’s Club adoption of scan-and-go technology has reached over a third of transactions in some clubs. Tesco has rolled out rapid-delivery services and is using AI to tailor range and routing. Costco is not copying these models, but its focus on reducing transaction time and using digital pre-pay inside the warehouse fits the same structural pattern: shifting simple tasks to software and preserving human capacity for higher-friction work.
Pushing Volatility Upstream: Tariffs, Sourcing and Kirkland
Costco’s warehouse model depends on stable, low-friction operations. The company is therefore pushing external volatility upstream into procurement and private label control rather than allowing it to surface at the shelf or checkout.
Tariff disclosures are clear on this point. Management describes the future impact of tariffs as ‘extremely fluid’ and notes that recently eliminated IEEPA tariffs have been replaced with new global tariffs for at least 150 days. In response, buyers are moving country of production where it makes sense, consolidating buying efforts globally to lower cost of goods, leaning in on Kirkland Signature where the supply chain is more controllable, and sourcing more items domestically.
Throughout the past year, the company has in many cases not passed the full cost of tariffs on to members. The complexity and timing of tariff changes make it difficult to track item-level impact, but any legal recoveries from tariff disputes are earmarked for lower prices and better values rather than retained margin. This makes the supply chain the buffer between policy volatility and member pricing.
Kirkland Signature is central to this. The brand typically offers 15 to 20 percent value compared to comparable national brands, and about 30 new Kirkland items were launched in the quarter. Recent examples include price reductions on staples such as butter, coconut water, seaweed snacks and olive oil as input costs eased. These cuts are significant in absolute terms: butter moving from $13.89 to $8.49, olive oil from $29.99 to $24.99 over one quarter.
At an operating level, this approach requires differentiated sourcing strategies for private label and national brands, and closer integration between demand planning, commodity tracking and contract negotiation. It also affects SKU policy. A limited-SKU model simplifies the execution of tariff moves and price changes but concentrates volume and risk into fewer lines, increasing the importance of supplier resilience and alternative sources.
Digital Demand Without Digital Sprawl
Alongside physical redesign, Costco is building a digital demand layer that it insists will remain consistent with its value positioning. Site traffic grew 32 percent and app traffic 45 percent in the quarter, with digitally enabled comparable sales up 22.6 percent. Same-day delivery through Instacart, Uber Eats and DoorDash is growing faster than overall digital sales, and personalised product recommendation carousels drove over $470 million of e-commerce sales in the quarter.
The organisation links this explicitly to its warehouse model. New personalisation capabilities on digital sites are starting to have a measurable impact on e-commerce growth, and modernised product display pages are driving incremental sales both on the dot-com site and to same-day delivery. At the same time, automated pay stations, mobile wallets and pharmacy apps are raising digital adoption inside warehouses.
In operational terms, this kind of dual digital layer demands clean master data for products and locations, consistent pricing logic across channels, and inventory visibility that allows store-based picking for same-day services without undermining shelf availability. It also increases the need for a planning cadence that connects digital campaigns and recommendation engines to physical replenishment at depot and warehouse level.
Costco is explicit that its work with AI companies and retail media will be used primarily to reinforce member value, not to create a separate profit pool. Management notes that media revenue from more than 1,000 supplier participants is growing double digits, but states that the vast majority of this will be reinvested into better offers and top-line growth. That choice keeps the focus on throughput rather than on yield per impression.
Constraints: Fuel, Fresh and Non-food Inflation
The model is not without constraints. Management highlights the situation in the Middle East as a potential risk to fuel costs and shipping schedules for the rest of the fiscal year. Fuel dynamics already show up in the numbers: gas comps were negative mid-single digits in the quarter, driven by mid- to high single-digit price deflation, although gallon growth and a roughly 50 percent cross-shop rate into the warehouse helped. Gas price spikes can increase traffic to forecourts and warehouses, but they also increase operational load on parking, forecourts and adjacent warehouse entrances.
Category inflation and deflation also create planning friction. In fresh, comparable sales were up low double digits, led by meat and bakery, with strong growth in both premium beef cuts and lower-cost proteins such as ground beef and poultry. Food and sundries grew mid-single digits, but egg price deflation is a headwind to sales even as units and market share in eggs increase due to strong price positioning. Nonfoods saw slightly higher inflation, partly linked to tariffs and input costs, which makes balancing price leadership with margin discipline more complex.
These dynamics push inventory risk back into planning and procurement. When produce, eggs and dairy are in deflation while nonfoods are mildly inflationary, allocation decisions between fresh and general merchandise, and between private label and branded, become more sensitive. Costco notes that overall inflation decreased slightly in the quarter, and that the LIFO impact was modest, but the detailed category pattern matters for how much cost volatility the warehouse can absorb without operational disruption.
What Costco’s Model Now Enables
Costco’s operating disclosures describe an organisation that is using warehouse design, checkout automation, sourcing control and a disciplined digital layer to increase the volume its network can handle at a given cost base. The network is growing, but the more significant change is inside each node: more efficient flows, faster front ends, and procurement structures that absorb tariff and commodity noise upstream.
For cross-industry operations teams, the implication is straightforward. High-volume growth in a constrained cost environment now depends less on adding capacity and more on reconfiguring the way existing capacity works. Costco’s model shows how a limited-SKU, membership-led format can raise throughput and protect price credibility by treating the warehouse as an integrated supply node rather than a static store, and by pushing volatility into sourcing and planning rather than allowing it to surface in queues and stockouts.
