Is COST a Buy? What to Consider in 2026

Last updated June 2026

Short answer

There is no universal answer to whether COST is a buy; it depends on your thesis, time horizon, and what you already own. Below is the case for Costco Wholesale, the main risks to weigh, where the stock trades, and a framework to decide for yourself. This is informational, not a recommendation, and Walnut is not an investment adviser.

Costco Wholesale operates a membership-based warehouse club chain. Members pay an annual fee (currently $65 for basic Gold Star, $130 for Executive) for access to Costco warehouses, where they can buy products at lower markups than traditional retailers. Costco operates approximately 900 warehouses globally, with the largest concentration in the United States plus meaningful presence in Canada, Mexico, the UK, Japan, South Korea, Taiwan, Australia, and other markets. The business model is unusually structured: Costco's gross margins on merchandise are low (typically around 11%, compared to 25%+ for traditional grocers), and most of the company's operating income comes from membership fees, which are essentially pure profit. This aligns Costco's incentives with members: the company makes money when members renew, which happens when members feel they're getting value. Renewal rates exceed 90%. Founded in 1983 (current corporate form from a 1993 merger), headquartered in Issaquah, Washington. Ron Vachris has been CEO since 2024.

The case for Costco Wholesale

1. Membership fee growth.

Costco raised the Gold Star membership fee from $60 to $65 and Executive from $120 to $130 in 2024, the first increase in seven years. Future increases will follow the same pattern: infrequent, but enormously accretive to operating income when they happen. Each new member is essentially pure profit at the margin.

2. International expansion.

Costco continues to expand internationally, with new warehouses in China, Sweden, France, and other markets each year. International stores often outperform US stores on early-year revenue. The runway for store growth is long.

3. E-commerce and Costco Next.

Costco's e-commerce business is growing faster than warehouse sales but remains a smaller portion of revenue. Costco Next (a curated direct-from-manufacturer e-commerce platform) is the more interesting recent strategic initiative.

4. Inflation-resistant value positioning.

When consumers are squeezed, the value proposition of warehouse club membership strengthens. Costco has historically gained share during recessions because households increase basket sizes and consolidate purchases.

The risks to weigh

Costco's premium valuation embeds high expectations for continued same-store sales growth and margin expansion. Any consumer slowdown or competitive pressure from BJ's, Sam's Club, or Amazon would compress the multiple.

Valuation context (as of early 2026)

Revenue (TTM): ~$260 billion
Operating margin: ~3.5% (low, by design; membership fees are the profit lever)
Net income (TTM): ~$7.5 billion
EPS (TTM): ~$17.00
P/E (TTM): ~55x
Price to sales: ~1.5x
Dividend yield: ~0.5%, with periodic special dividends
Free cash flow: ~$7 billion annually
Membership renewal rate (US): ~93%

Costco trades at one of the highest P/E ratios in retail, reflecting the durable membership model, consistent same-store sales growth, and the long runway for international expansion. The premium is also driven by Costco being widely viewed as a quality compounder in retail. The valuation has compressed historically only during severe market drawdowns.

How to decide for yourself

Rather than asking whether COST is a buy in the abstract, it tends to help to answer four questions:

Thesis: do you believe the case above, and is it still true today?
Time horizon: a single stock can be volatile, so a longer horizon absorbs more of the swings.
Position sizing: a thesis can be right and the sizing still wrong; decide how much of your portfolio one name should be.
Overlap: check whether you already hold COST indirectly through an index or sector ETF before adding more.

For the full picture, see the COST stock guide (what the company does, the ETFs that hold it, similar stocks, and the themes it fits). In Walnut you can ask its AI about COST against your real portfolio and see your actual exposure before deciding.

Build a basket around COST with Walnut

Use Costco Wholesale as one constituent in a thematic basket Walnut's AI helps you assemble. Describe a thesis you believe in, the AI proposes the holdings and weights, and you approve before any broker order.

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FAQ

Is COST a good stock to buy right now?

There is no universal answer. Whether Costco Wholesale fits depends on your thesis, time horizon, risk tolerance, and what you already own. This page lays out the case for, the main risks, and where the stock trades, so you can decide for yourself. Walnut is not an investment adviser and this is not a recommendation.

What does Costco Wholesale do?

Membership warehouse club. Renewal rates above 93% and consistent dividend growth; quality compounder.

What are the main risks of COST?

What is Costco's ticker symbol?

COST, listed on Nasdaq. Officially Costco Wholesale Corporation. Founded 1983, headquartered in Issaquah, Washington. Trades during US market hours, available at every major US brokerage.

Who are Costco's competitors?

In membership warehouse clubs: Sam's Club (Walmart subsidiary) and BJ's Wholesale. In broader retail: Walmart, Target, Amazon. The differentiated membership model with high renewal rates makes direct competition less intense than in traditional grocery or general merchandise.

Why is Costco's stock so expensive?

P/E of approximately 55x reflects the durable membership model with 93%+ renewal rates, consistent mid-single-digit same-store sales growth, the long runway for international expansion, and the structural advantage that membership fees provide an essentially pure-profit revenue stream. Costco is widely viewed as a quality compounder; the valuation premium has historically held across most market environments.

What is Costco's P/E ratio?

Approximately 55x trailing twelve months as of early 2026. Among the highest P/E ratios in retail, reflecting the membership model durability, consistent execution, and long-runway store growth. The premium has been sustained for years.

Walnut is informational and is not an investment adviser. This page is educational and not a recommendation to buy or sell COST; figures are approximate and dated, and your own situation, time horizon, and risk tolerance should drive any decision. Verify current data before investing.