Quick Read – Costco sells inventory before supplier invoices arrive, letting vendors finance its shelves and generating 29.1% ROE on just 3% profit margins. – COST shares trade at roughly 37 times fiscal 2028 EPS, while 82.9 million members renewing near 92% power the long-term…
ll case. – Consumer advocate Clark Howard has long pointed out an oddity about Costco that almost no other big-box retailer can match: the company frequently sells inventory before it even has to pay the supplier for it. That is a genuine cash flow superpower, and it sits underneath the pricing model that has made Costco (NASDAQ:COST) the most unusual retailer in America
The Pricing Secret Hiding in Plain Sight Costco makes its money on membership fees, using razor-thin retail margins on merchandise to lock members in. Trailing profit margin sits at just 3.01% and operating margin at 3.67%, yet return on equity is 29.1%. That combination only works because inventory turns fast enough to fund itself.
CEO Ron Vachris said it plainly on the fiscal Q3 2026 call: “Our goal is to be the first to lower prices and last to raise them.” He backed it up with specific Kirkland Signature cuts, including Crispy Wings from $16.99 to $14.99 and king-size sheets from $89.99 to $79.99. CFO Gary Millerchip added that new Kirkland items offer “savings of at least 15% to 20% to the national brand equivalent with equal or better quality.” Why the Cash Flow Angle Matters When a retailer sells a pallet of Kirkland detergent before the supplier invoice is due, the working capital cycle inverts. Suppliers effectively finance the shelves.