Costco Posts 9.4% Comparable Sales Growth in March Despite One Less Shopping Day
Costco posted 9.4% comparable sales growth in March 2026 with digital sales surging 23.3%, outperforming Walmart's 4.6% growth and Target's -2.5% decline. The warehouse club's membership model and AI-enhanced personalization drove $470 million in Q2 e-commerce sales.
Costco's digital acceleration shows consumers prioritizing bulk buying and value during economic uncertainty, potentially reducing basket frequency on Amazon/Walmart. Sellers should monitor if their categories are shifting toward warehouse-style purchasing patterns that favor fewer, larger orders.
The membership model's resilience during economic pressure shows consumers consolidating purchases around value propositions, potentially accelerating the shift from frequent small orders to planned bulk buying across all retail channels.
Check Amazon Business Analytics for bulk order trends -- if increasing 15%+ YoY, consider multipacks or family-size variants to capture warehouse-style demand.
Review Walmart Connect and Amazon DSP performance in household essentials categories where Costco competes directly.
Bottom Line
Costco's 23% digital growth signals bulk-buying shift threatening marketplace basket sizes.
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Costco's 23% digital growth signals bulk-buying shift threatening marketplace basket sizes.
Key Stat / Trigger
23.3% digital sales growth in March 2026
Focus on the operational implication, not just the headline.
Full Coverage
Costco reported net sales of $28. 41 billion for the five weeks ended April 5, 2026, an 11. 3% increase from $25. 51 billion in the same period last year. The result is notable because March had one fewer shopping day compared to the prior year due to the calendar shift of Easter, a headwind that Amazon estimated cost the company approximately 1.
5 percentage points off both total and comparable sales. The Numbers Total comparable sales grew 9. 4% for the five-week period. Broken down by region, the US posted 8. 7% growth, Canada grew 10. 7%, and other international markets led with 11. 9%. On an adjusted basis excluding gasoline prices and foreign exchange effects, total comparable sales grew 6.
2%, following gains of 7% in February and 6. 4% in January. The standout figure is digital. Digitally enabled comparable sales surged 23. 3% for the month, or 22. 5% adjusted for fuel and currency impacts. This continues a sustained run of digital outperformance, following gains of 21. 8% in February and 34. 4% in January.
For the full 31-week year-to-date period, digitally enabled comparable sales are up 22% year over year. What Is Driving the Digital Growth Costco's digital acceleration is not accidental. The company has been building out personalization capabilities across its website and app with measurable results.
Personalization carousels drove over $470 million in e-commerce sales in its fiscal second quarter. App visits jumped 63% and website traffic increased 32% in Q2, while e-commerce average order value rose 15%.
Same-day delivery through Instacart, Uber Eats, and DoorDash is growing faster than overall digital sales, pointing to demand for convenience alongside the traditional warehouse experience.
Costco CEO Ron Vachris has indicated the company is working with leading AI companies to ensure Costco's value proposition is visible to members as they use AI tools for shopping decisions, though no specific partnerships have been named.
How Costco Compares to Its Peers The March results reinforce Costco's position as the steadiest performer among major US retailers in the current environment. Walmart posted 4. 6% comparable sales growth in its US division for the fourth quarter of fiscal 2026 and reported 24% global e-commerce growth, driven by strong upper-income household gains.
Target faced a 2. 5% comparable sales decline in its fourth quarter of fiscal 2025 and is still working to return to growth. Costco's membership model provides a structural advantage in the current consumer environment. With 92. 1% renewal rates in the US and Canada and 82.
1 million paid members globally, the business generates a recurring revenue base before a single product is sold. Membership fee income grew 13. 6% in the most recent quarter to $1. 36 billion, a high-margin stream that insulates Costco from the margin pressure affecting more promotionally dependent retailers.
The Bigger Picture Costco's consistency through a period marked by tariff uncertainty, energy cost volatility, and shifting consumer confidence signals something specific about its positioning. The membership model attracts value-conscious shoppers who are less likely to trade down to cheaper alternatives because Costco is already offering warehouse pricing.
At the same time, the treasure-hunt experience and premium product mix retain higher-income members who continue spending on discretionary items even when economic conditions tighten. For the full fiscal year, analyst consensus estimates point to 8. 3% sales growth and 13% earnings per share growth. For the following fiscal year, estimates call for 7.
3% sales growth and 9. 8% earnings growth. The company currently operates 928 warehouses globally and plans approximately 28 net new locations in fiscal 2026. The post Costco Posts 9. 4% Comparable Sales Growth in March Despite One Less Shopping Day first appeared on EcomCrew.
Original Source
This briefing is based on reporting from EcomCrew. Use the original post for full primary-source context.
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