Costco's May Sales Surge 14.5% to $20.95B: Value Reigns as Consumers Tighten Belts

Quick Take

Costco Wholesale (COST) reported May sales of $20.95 billion, a 14.5% year-over-year surge that underscores the power of its value-focused model. As consumers grow more cautious — with expected inflation easing only slightly to 4.6% — Costco's membership-driven, low-margin strategy is winning market share from weaker competitors.

The Catalyst: May Sales Blow Past Expectations

Costco's May sales of $20.95 billion represent a 14.5% jump from last year. This comes as Americans expect inflation of 4.6% over the next year, down from 4.8% in May — still elevated, but consumers are clearly seeking value. The strength is especially notable given that other consumer staples are struggling: Beyond Meat's Q1 revenue fell 15.3% to $58.2 million, and Conagra Brands' Q3 sales dropped 1.9% with adjusted EPS down 23.5%.

Even Amazon's Prime Day, which drove $8.3 billion in U.S. online spending on day one (up 5.3% YoY), couldn't overshadow Costco's brick-and-mortar momentum. The message is clear: when wallets tighten, Costco's warehouse model thrives.

Our Data: What the Numbers Say

Our proprietary estimates model shows Costco consistently beating consensus on top-line growth. The 14.5% May sales increase is well above our modeled 10.2% for the quarter, suggesting strong membership engagement and higher average ticket sizes.

Key beats from our model:

• Revenue growth: May's 14.5% vs. our estimate of 10.2% — a 420 bps beat.
• Membership renewals: U.S./Canada renewal rates remain above 90% , a critical moat that drives recurring revenue.
• Gross margin: At 12.88% , Costco's famously thin margins are actually expanding slightly as it gains scale and negotiating power with suppliers.

Segment breakdown (our estimates):

• U.S. same-store sales (ex-gas & FX): +8.5% vs. consensus 6.9% .
• International same-store sales: +6.2% , driven by strong performance in Canada and Japan.
• E-commerce: +12.3% , accelerating as Costco invests in digital fulfillment.

Valuation: Is the Premium Justified?

Costco trades at 27.8x forward earnings, a premium to the S&P 500's 21x and to peers like Walmart (24x) and Target (16x). But that premium is earned: Costco's 90%+ membership renewal rate and 12%+ dividend growth rate (from $0.45 quarterly in 2016 to $1.47 now) create a compounding machine.

Our valuation model:

• DCF fair value: $1,020 per share (assumes 10% revenue growth, 8% WACC).
• P/E-to-growth (PEG) ratio: 1.9x — reasonable for a company with 14%+ earnings growth.
• Dividend yield: 0.56% — low, but the 12% annualized growth rate means a $146,000 investment today could yield nearly $10,000 in annual income by 2036.

Technical Setup: Momentum Building

Costco's stock is trading at $952.45, up 3% today, with a day's range of $924.89–$952.57. The 52-week range is $844.06–$1,096.50, and the stock has rallied 80% over the past three years — matching Amazon's return.

Our technical score: 7/10

• RSI: 62 — bullish but not overbought.
• Moving averages: Price is above the 50-day ($935) and 200-day ($900) SMA — a golden cross setup.
• Volume: 91.7K today vs. average 2.3M — light, but that's typical for a non-earnings day.
• Support/resistance: Key support at $925 (recent low), resistance at $1,000 (psychological barrier). A break above $1,000 could trigger momentum buying.

Investment Thesis

Costco remains a core holding for us. The May sales data confirms that its value proposition is resonating in a cautious consumer environment. With 90%+ membership retention, a 12% dividend growth rate, and a fortress balance sheet, Costco offers both growth and income.

Risks to watch:

• Stock split speculation: Shares dipped below $1,000 on May 28 and haven't recovered. A split could boost retail interest, but it's not a fundamental driver.
• Inflation moderation: If inflation falls faster than expected, consumers may shift back to premium retailers, pressuring Costco's traffic.
• Valuation: At 27.8x earnings, the stock is priced for perfection. Any miss on membership growth could trigger a correction.

Bottom Line

Costco's 14.5% May sales growth is a standout in a tough consumer environment. The company's unique model — low margins, high membership loyalty, and consistent dividend growth — makes it a defensive growth stock. We see fair value at $1,020, offering 7% upside from current levels. Long-term investors should buy on any dip below $925.