Costco: The Retail Anti-Amazon That Wins on Trust

A Costco warehouse — where members pay to shop, and trust is the product

Costco does not advertise. It does not run flash sales. It does not have loyalty points, coupons, or a premium tier that gives you faster shipping. Its stores are cavernous concrete warehouses with no frills. You need a membership card just to walk in. And somehow, this company — selling dog food next to cashmere sweaters next to 72-count muffin packs — has become one of the most beloved and resilient retailers in the world.

The Costco model is an anomaly in the history of retail. Every other retailer optimizes to maximize revenue per SKU. Costco optimizes for something else entirely: member trust. And from that single, seemingly counterintuitive decision flows one of the most durable business models in consumer commerce.

The Membership Paradox

A Costco warehouse — where members pay to shop, and trust is the product

Costco makes almost no money selling goods. That is not hyperbole — it is, in a meaningful sense, the business model.

In fiscal year 2024 (ending September 1, 2024), Costco generated $254 billion in net sales. Operating income was $9.3 billion — an operating margin of roughly 3.6%. Thin by any standard. But buried inside that income statement is a line that explains everything: membership fee revenue of $4.6 billion.

Here is the counterintuitive truth: Costco's entire operating profit is essentially explained by membership fees. The company sells merchandise at close to cost, deliberately pricing out the vast majority of its profit to the membership line. In fiscal 2024, membership fees alone accounted for roughly 70% of operating income.

This is not a flaw in the model. It is the model.

By pledging to sell goods at the lowest possible markup — Costco's policy is to never mark up food items more than 14% above cost, and non-foods no more than 15% — Costco transforms the membership fee from a simple entry charge into something far more powerful: a trust contract. Members pay $65 per year (Gold Star) or $130 per year (Executive) with the implicit understanding that Costco will never rip them off. The company's entire commercial existence depends on keeping that promise.

The renewal rate tells you how well they keep it. In fiscal 2024, Costco's US and Canadian renewal rate hit 92.9%. Globally it was 90.5%. These are not the numbers of a company that locks people in — Costco has no auto-renewal fine print traps, no cancellation friction. Members renew because they want to.

Twenty Years of Compounding Membership

The financial table below shows Costco's trajectory over two decades:

The thing to notice is the relentlessness of it. Revenue has grown nearly five times over since 2005. Net income has grown nearly seven times. Membership fees have grown more than four times. And through all of it, operating margins have stayed essentially flat — because widening them would mean charging members more or trimming the price promise, and Costco will not do that.

The $1.50 Hot Dog

Nothing captures Costco's philosophy better than the $1.50 hot dog combo.

In 1985, Costco introduced a quarter-pound all-beef hot dog and a 20-ounce soda for $1.50. Forty years later, it costs $1.50. Not $1.99. Not $2.25. One dollar and fifty cents.

This has required active effort. When inflation pressures mounted in the early 2000s, then-CEO Jim Sinegal reportedly told his successor Craig Jelinek: "If you raise the effing hot dog, I will kill you." The hot dog combo is now subsidized — Costco loses money on it. The point is not the hot dog. The point is the signal it sends: we will absorb costs before we raise prices on you.

Costco eventually solved the hot dog problem by vertically integrating: they now own their own hot dog manufacturing facility in Tracy, California. This is characteristic of how Costco approaches its commitments — instead of finding a way to raise the price, they find a way to make the commitment sustainable.

Kirkland Signature: The Brand That Beat the Brands

Kirkland Signature, Costco's private label, is one of the great stealth brands in consumer goods. Named after Costco's original headquarters city in Kirkland, Washington, Kirkland has grown into a roughly $60 billion annual revenue brand — which would make it, by itself, larger than many Fortune 100 consumer companies.

The Kirkland strategy is to source products from the same manufacturers as the leading national brands, often with superior specifications, and sell them at a significant discount. Kirkland olive oil is sourced from the same producers as premium Italian brands. Kirkland vodka is distilled by Grey Goose's parent company. Kirkland batteries consistently outperform Duracell and Energizer in independent testing. Kirkland coffee, trail mix, protein bars, and rotisserie chickens have cult followings.

The rotisserie chicken deserves special mention. Costco sells its $4.99 rotisserie chickens at a loss — they cost roughly $7.50 to produce and sell. The company reportedly loses tens of millions annually on rotisserie chickens. Like the hot dog, this is a deliberate statement. Members who know Costco's rotisserie chicken is $4.99 when the grocery store charges $8-10 know the price promise is real. And once you're inside to pick up a chicken, you might also buy a set of tires, a case of wine, and a year's supply of paper towels.

The Treasure Hunt Architecture

Traditional retailers maximize SKUs. More products mean more chances to make a sale. Walmart carries roughly 140,000 items. Amazon carries hundreds of millions. Costco carries about 3,800 SKUs at any given time.

This is not a limitation — it is a deliberate structural choice with profound implications.

By carrying only 3,800 SKUs, Costco achieves extraordinary purchasing leverage with suppliers. When you are the only retailer through which a particular product can reach Costco's 133 million cardholders, you negotiate from a position of enormous power. Costco extracts better prices, better terms, and often better products than any competitor because suppliers know Costco placement is transformative.

The limited SKU count also creates the "treasure hunt" experience that Costco members frequently describe. Only a fraction of Costco's inventory is permanent — many items are limited runs, seasonal imports, or one-time purchases. A $899 set of luggage might appear for two weeks and never return. A particular wine at an extraordinary price might be available for one season. This creates urgency: if you see something compelling, buy it now, because it may not be there next time.

The treasure hunt effect drives frequency. Costco members don't just shop when they need something — they shop because the experience of discovery is itself rewarding. Average Costco warehouse revenue per warehouse exceeds $200 million annually, among the highest of any retailer globally.

The Anti-Amazon

Costco is frequently described as immune to Amazon. This is one of the more interesting claims in contemporary retail, and it is largely true — for reasons that reveal something important about the nature of e-commerce.

Amazon optimizes for convenience: any product, delivered to your door, as quickly as possible. This is enormously powerful for most consumer goods. But Costco is not selling convenience. It is selling a curated physical experience built around trust, discovery, and value density.

The Costco shopping trip is an experience: the oversized carts, the warehouse atmosphere, the samples, the food court with the $1.50 hot dog, the unexpected finds in the center aisles. It is social, sensory, and particular in ways that a website cannot replicate. Members bring their families. They share finds on Reddit communities. They plan their warehouse trips.

Costco does have an e-commerce operation — costco.com — but it is a small fraction of revenue and not the business's growth driver. Costco.com does not attempt to replicate Amazon. It sells large, high-value items — appliances, furniture, electronics — where the warehouse experience adds less. But Costco's competitive moat is fundamentally physical.

Amazon has tried to compete in grocery with Whole Foods and Amazon Fresh. Neither has achieved anything close to Costco's unit economics. The reason is simple: Costco's model requires volume through a limited SKU set to generate the purchasing leverage that enables the price promise. Amazon's model, by contrast, maximizes selection. These are fundamentally different architectures, and they don't compete on the same terms.

International Expansion: The Global Treasure Hunt

Costco operates 891 warehouses globally — each a self-contained commercial ecosystem with an average of $200M+ in annual sales

Costco currently operates 891 warehouses globally (as of fiscal year 2024 end), with 614 in the United States and 277 internationally. The international portfolio includes Canada, the United Kingdom, Japan, South Korea, Australia, Spain, France, China, and Taiwan.

The international expansion tells a fascinating story about the universality of the value proposition. Costco Japan, opened in 1999, became one of the company's highest-volume locations almost immediately. Japanese consumers, famous for demanding quality at reasonable prices, responded viscerally to the Costco model. The Costco Makuhari warehouse in Chiba became a landmark shopping destination.

South Korea is another standout, with Costco warehouses routinely generating among the highest per-warehouse revenue globally. The Korean consumer culture, with its appreciation for premium products at accessible prices, aligns naturally with Kirkland Signature and Costco's private label strategy.

China, added in 2019 with the Shanghai Minhang warehouse, had such overwhelming demand on opening day that the location had to be temporarily closed due to overcrowding. Costco China has since added additional locations and continues to expand.

The international growth story matters for the long-term model because international members have lower renewal rates than US/Canada (the global rate is 90.5% versus the US/Canada rate of 92.9%), which means there is room to improve as international markets mature and the brand deepens.

The Membership Fee Flywheel

Costco's business model is a flywheel, and the membership fee is the pivot.

More members → more purchasing volume → better supplier terms → lower prices → higher member satisfaction → more renewals and referrals → more members.

The fee itself has barely changed in nominal terms — Costco raised the Gold Star fee from $60 to $65 in September 2023, the first increase since 2017. This pricing restraint is intentional. Frequent fee increases would signal that Costco is extracting value from members rather than delivering it. The fee increases that do happen are carefully spaced and always followed by communication about the value delivered.

The Executive membership ($130/year) adds another dimension: a 2% annual reward on qualified purchases, capped at $1,000. For a heavy Costco household spending $15,000 per year through Costco, the Executive membership pays for itself and delivers a net refund. This incentivizes heavy usage, which deepens the relationship and makes renewal near-automatic.

As of fiscal 2024, approximately 46% of Costco members held Executive memberships. The Executive member cohort spends more, renews at higher rates, and generates disproportionate revenue. Costco has been quietly growing this share for years.

What the Street Gets Wrong

Wall Street has traditionally struggled with Costco. The stock is perennially "expensive" by conventional metrics — it typically trades at 45-55x earnings, more expensive than virtually any comparable retailer, and often cited as a target for analysts who believe the valuation is stretched.

The miss is in understanding what Costco's earnings actually represent. Because Costco deliberately keeps merchandise margins at near-zero, its reported net income significantly understates the business's true earnings power. The membership fee is essentially a pure-margin revenue stream — the cost of maintaining memberships (card printing, customer service) is trivial. If Costco were to let merchandise margins rise to even 5% — still well below any conventional retailer — its earnings would approximately double.

The reason Costco doesn't do this is the reason its model works: they have made a deliberate, principled decision to pass merchandise margin to members, because the trust that generates is worth more than the incremental earnings. This is a business strategy, not an accounting accident.

The market eventually comes to reward this trust-first model. Costco's total shareholder return over the past 20 years has exceeded 6,000% — more than 3x the S&P 500.

Looking Forward

Costco's growth levers for the next decade are visible:

**Membership fee increases** remain underutilized. The most recent increase (September 2023) moved the Gold Star fee from $60 to $65. Given member renewal rates above 90%, fee pricing power is exceptional. A move to $70 or $75 within the next few years is widely expected and will flow almost entirely to the bottom line.

**Executive membership penetration** continues to grow. As the 46% Executive share expands toward 55-60%, the higher fee tier generates incremental revenue with minimal additional cost.

**International warehouse expansion** has significant runway. With 614 US warehouses versus 277 international locations, international remains underpenetrated. China specifically is early — Costco added its second China warehouse in Suzhou in 2023 and has a pipeline of additional locations.

**E-commerce infrastructure** is maturing. While not a strategic priority, Costco's e-commerce capabilities are improving. The company launched same-day delivery partnerships and has gradually built out its digital operation without compromising the warehouse experience.

**Costco's balance sheet** is fortress-grade: minimal long-term debt, substantial free cash flow, and a pattern of special dividends when cash accumulates. In fiscal 2024, free cash flow exceeded $7 billion. The company returns capital through both regular dividends and periodic special dividends — the special dividend declared in December 2023 was $15 per share.

Verdict

Costco is the retailer that Amazon cannot kill, the grocer that refuses to compete on selection, and the membership business that has never leveraged its trust to extract maximum value from members. For forty years, it has chosen restraint where competitors chose extraction, and the result is one of the most loyal customer bases and most durable competitive moats in consumer commerce.

The hot dog is still $1.50. The chicken is still $4.99. And the renewal rate is still above 90%.

That combination — a forty-year track record of keeping promises to ordinary people — is not something you can replicate with a better algorithm.

Photo credits

All photos are sourced from Wikimedia Commons under their respective licenses:

• Costco Exterior — Mike Mozart, CC BY 2.0, via Wikimedia Commons
• Costco (East Lyme, Connecticut) — Mike Mozart, CC BY 2.0, via Wikimedia Commons