Costco 1983: Making Money by Refusing to Mark Up
Situation
It is the 1980s. Jim Sinegal and Jeffrey Brotman are building Costco (the first warehouse opens in Seattle in 1983), and the model breaks the basic rule of retail.
Normal retailers make money the obvious way: buy goods, mark them up — often 25% to 50% or more — and pocket the difference. The markup is the business.
Costco's design says no. Its rules are deliberate and severe:
- You pay to shop. Customers buy an annual membership (historically around $60) just for the right to enter.
- Markups are capped. No branded item may be marked up more than 14%, and no Kirkland Signature private-label item more than 15% — a fraction of conventional retail margins. Sinegal polices this obsessively.
- Selection is tiny. A few thousand SKUs, not the tens of thousands at a supermarket — sold in bulk, on pallets, in a bare warehouse.
This forces an uncomfortable question that makes investors nervous: if you won't mark merchandise up, where does the profit come from? The answer Costco is betting on is radical — the company will earn its profit on membership fees, and run the merchandise itself at close to break-even.
The decision moment
It is the 1980s, and Sinegal must commit to where Costco makes its money — and hold the line under pressure.
Three paths:
- Mark up like a normal retailer. Raise margins toward the industry's 25%+, especially on popular products people will pay for. Boost profit per item and please Wall Street. Treat membership as a nice add-on, not the engine.
- Hold the line. Cap markups at 14/15%, make the profit on membership fees, keep SKUs few and turns fast, and pass every possible saving to members. Bet that obsessive value drives loyalty, renewals, and volume — and that the fees more than cover the profit. (The disciplined, counter-intuitive path.)
- Drop the fee entirely. Open the warehouses to everyone with no membership, maximize foot traffic and volume, and make money purely on merchandise margin like a regular discount store.
You are Jim Sinegal.
Key datapoints (for reference)
| Metric | Value |
|---|---|
| First Costco warehouse | 1983, Seattle |
| Markup cap | ≤14% on branded items; ≤15% on Kirkland Signature |
| Typical retail markup (comparison) | ~25–50%+ |
| SKU count | ~3,700–4,000 (vs. tens of thousands at a supermarket) |
| Membership fee (historical) | ~$60/year |
| Membership fees as % of revenue | ~2% |
| Membership fees as % of operating profit | ~70%+ |
| Gross margin | ~10–12% (very low for retail) |
| Notable | Famously high employee pay and low turnover for retail |
Frameworks invoked
- Membership Business Model. The profit doesn't come from the goods — it comes from the fee. Members pay for access to low prices; Costco runs merchandise near cost. Recurring, high-margin membership revenue is the real engine, and it renews year after year.
- Profit-Pool Location. The strategic insight is where in the system you choose to make money. By placing the profit pool in membership rather than markup, Costco can keep prices lower than competitors who must profit on every item.
- Limited-SKU & Inventory Turns. Few products sold in volume means enormous buying power per item, simple operations, and goods that sell before the supplier's bill is even due. High turns + low handling = costs low enough to make the thin margins work.
- Customer Loyalty Flywheel. Low prices → members feel the fee is worth it → high renewal rates → reliable fee income → ability to keep prices low → more members. Each turn reinforces the next.
Discussion questions
- Capping your own markup at 14% looks like leaving money on the table. Why might refusing to maximize per-item margin produce a bigger, more durable business?
- Roughly 70% of operating profit comes from ~2% of revenue (fees). What risks come with concentrating your profit in a single, renewal-dependent line — and how do you protect it?
- Wall Street regularly pressures Costco to raise margins. How does a CEO resist quarter-to-quarter pressure to defend a long-term model — and when is that resistance just stubbornness?
- Costco pays workers well above retail norms, which analysts often criticize. How does that choice connect to the membership flywheel rather than contradict it?
- The limited selection (one or two choices per category) annoys some shoppers. How is removing choice a strategic advantage here, not a weakness?
The real outcome (revealed at session end)
1983 onward: Costco holds the line. It enforces the markup cap, keeps selection deliberately narrow, and makes its profit on membership fees while running merchandise at razor-thin margins.
The model proves extraordinarily durable. Membership fees — about 2% of revenue — come to provide the large majority of operating profit, with renewal rates consistently very high because members genuinely save money. The discipline becomes a moat: competitors who profit on markup structurally cannot match Costco's prices without breaking their own economics.
In 1993, Costco merges with Price Club (the warehouse pioneer founded by Sol Price), and grows into one of the largest and most admired retailers in the world — famous for low prices, fanatically loyal members, and unusually well-paid staff.
The lesson: Decide where you make money, then design everything around protecting it. Costco chose to profit on membership and treat merchandise as near break-even — and that single decision let it offer prices rivals couldn't, build a loyalty flywheel, and resist the constant temptation to mark things up. The discipline to not maximize margin per item is exactly what made the business great.
Sources
- Charlie Munger and Costco shareholder commentary on the membership model.
- Harvard Business School case, "Costco Wholesale Corporation."
- Costco Wholesale annual reports (membership-fee and margin disclosures).
- Coverage of Jim Sinegal's pricing discipline and the 14%/15% markup cap.