Chapter 1 · Growth

Costco sells goods near cost. The profit is somewhere else.

Once you see where the money actually comes from, the whole business clicks.

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✦ The bottom line

Costco sells you bulk goods at near-cost. The profit comes from the $65 annual membership fee.

↓ the brief below

✦ Teach me

The membership-fee model

Most retailers make their money on markup — buy for $1, sell for $2. Costco does the opposite: sell at razor-thin margin so members get a great deal, then charge an annual fee to be a member at all. The trick: members pay every year whether they shop or not. That fee is mostly pure profit.

It changes which numbers matter. Watch the fee revenue and renewal rate — not the markup.

$68 billion in sales sounds like the headline. But here's the trick of the membership model: those sales aren't where the profit lives. They're the traffic generator — the thing that brings members through the door. The actual profit engine is the much smaller number we mentioned at the top: the fee. Let's see how big that engine actually is — and how fast it's growing.

So the engine is small ($1.36B) but it's growing faster than the sales it sits inside. That's a sign the membership model is strengthening, not just holding. But is Costco doing something special here, or is this just what retail looks like right now? The honest test: how is everyone else doing? If competitors are growing too, this is a rising tide. If they're flat or shrinking, this is the membership model specifically winning.

Money in vs. one year ago — most recent reported quarter

Strong