Walmart Uses Stores as Warehouses for Same-Day Delivery

Walmart is piloting a program to convert backroom shelves in select Dallas stores into micro-fulfillment centers for same-day delivery of third-party marketplace goods, aiming to close the gap with Amazon’s U.S. Marketplace sales of $333 billion by leveraging its 4,700 U.S. Store footprint as a distributed warehousing network, a move that could compress last-mile delivery costs and accelerate inventory turnover for high-growth categories like home and fashion, which CFO John David Rainey confirmed are expanding at over 30% annually.

How Walmart’s Store-as-Warehouse Model Targets Amazon’s Marketplace Dominance

The initiative, reported by the Financial Times on April 19, transforms underutilized stockroom space into staging zones for items sold by third-party sellers on Walmart.com, a strategic pivot given that marketplace revenues—though growing at roughly 20% year-over-year—remained below $14 billion in 2025 against Amazon’s U.S. Marketplace scale. This approach directly addresses the fiscal problem of high last-mile delivery costs, which erode EBITDA margins in e-commerce; by using existing store infrastructure, Walmart avoids the $15–$20 per square foot annual lease burden of dedicated fulfillment centers even as tapping into a labor pool already trained in inventory handling. For B2B logistics providers, this creates immediate demand for scalable warehouse management systems (WMS) that can synchronize in-store picking with third-party order streams—a gap filled by firms specializing in retail automation platforms that integrate with legacy POS systems.

Rainey’s commentary during Walmart’s Q1 2026 earnings call underscored the urgency: “We’re not just adding shelves; we’re reengineering the physics of proximity. Every foot of backroom space becomes a node in a same-day network that Amazon can’t replicate without duplicating our store density.” He noted that grocery-driven foot traffic—where 56% of financially stressed shoppers choose Walmart over Amazon per PYMNTS data—provides a captive audience for cross-selling higher-margin general merchandise, a category where Walmart’s marketplace share remains under 4% of total U.S. Online sales. The Dallas test, confirmed by Walmart’s investor relations portal as active in eight Supercenters, targets categories with above-30% growth, suggesting a deliberate focus on displacing Amazon’s strength in non-grocery verticals.

Supply Chain Physics and the Margin Implications of Distributed Fulfillment

Converting retail space into fulfillment nodes introduces operational complexity that directly impacts working capital efficiency. Inventory turns—a critical metric for retail profitability—could improve if backroom staging reduces the time between online order and store pickup from the current average of 4.2 hours to under 90 minutes, a benchmark cited in Walmart’s 2025 Supply Chain Sustainability Report. Although, this model risks increasing shrink if high-value electronics or apparel are stored in less-secure backroom areas versus traditional distribution centers with segregated high-theft zones. To mitigate this, Walmart is likely piloting RFID-enabled shelf sensors and AI-driven anomaly detection, technologies that fall under the purview of enterprise IoT solution providers specializing in retail loss prevention.

“The real arbitrage isn’t in the square footage—it’s in the labor elasticity. Walmart’s store associates already handle 2.1 million daily customer interactions; layering in micro-fulfillment tasks during low-traffic windows could boost labor utilization rates from 65% to 80% without new hiring.”

Financially, the shift could improve Walmart’s e-commerce contribution margin—which lagged Amazon’s North American retail EBITDA margin of 6.8% in 2025 by approximately 300 basis points—by reducing last-mile costs. Industry analysts estimate that store-based fulfillment cuts delivery expenses by 40–60% compared to ship-from-warehouse models for orders under 10 miles, a density advantage Walmart holds with 90% of the U.S. Population living within 10 miles of a store. This dynamic pressures third-party logistics (3PL) providers to adapt; firms offering omnichannel fulfillment orchestration services are seeing increased RFPs from retailers seeking to unify store, warehouse, and last-mile data under a single control tower.

The competitive ripple extends to commercial real estate, where big-box landlords may face renewed vacancy pressure if retailers accelerate the deprioritization of standalone fulfillment centers. Conversely, this trend elevates the strategic value of properties with robust loading docks and ample ceiling height—features that corporate real estate advisory firms now highlight when marketing distribution-adjacent retail assets to investors betting on the “store as hub” thesis.

Why This Isn’t Just About Delivery Speed—It’s a Marketplace Inflection Point

Walmart’s marketplace struggle isn’t logistical; it’s assortment depth. With first-party sales constituting over 80% of its $483 billion 2025 net revenue, the platform lacks the long-tail variety that drives Amazon’s marketplace take rate growth. By using stores to hold slow-moving, high-margin third-party items—think specialty home décor or niche fashion brands—Walmart can test demand without tying up capital in centralized inventory. This aligns with Rainey’s admission that the company has been “a little weaker” in home, hardlines, and fashion relative to competitors, categories where marketplace gross merchandise volume (GMV) growth exceeds 30% annually.

For B2B sellers, this creates a new on-ramp: brands previously excluded from Walmart.com due to minimum order requirements can now pilot products through localized store fulfillment, reducing entry barriers. Legal and compliance teams at corporate law firms specializing in e-commerce regulations are advising clients on the implications of hybrid liability—where a product sourced from a third-party seller but fulfilled via Walmart’s store network could blur responsibility chains under the INFORM Consumers Act.

As Walmart scales this model beyond Dallas, the metric to watch isn’t just same-day delivery uptake but marketplace take rate expansion. If the company can lift its marketplace revenue contribution from under 3% of total sales to 5% by 2027—a target implied by Rainey’s growth commentary—it would unlock over $24 billion in incremental annual GMV at current run rates, a shift that would force a reevaluation of Walmart’s e-commerce valuation multiples relative to pure-play competitors.

The editorial kicker? This isn’t a defensive countermove against Amazon—it’s an offensive reclamation of Walmart’s inherent advantage: physical presence. For B2B partners seeking to enable the next phase of retail infrastructure, the World Today News Directory remains the curated gateway to vendors who’ve proven they can turn store backrooms into profit centers.