⚠ It Is a Loan From Suppliers, and Loans Get RepricedLow threat

Costco Wholesale (COST) — threat to the moat

Free supplier financing lasts exactly as long as the supplier's alternatives are worse.

Free supplier financing is only free while the supplier accepts it, and Costco's own filings acknowledge that the change in net investment in merchandise inventories is "impacted by several factors, including inventory levels and turnover, payment terms with suppliers, and early payments to obtain discounts"1. Payment terms are a negotiated variable, not a law.

Where the supplier float is weakestFresh foods, FY2025 net sales$37,988M from short-cycle producersScarce high-quality items10-K: volumes may not be consistently availableEarly-payment discountsCostco trades float for them by choiceFY2025 interest income$469M, down from $533MPayment terms are a negotiated variable, not a law.
Free supplier financing lasts exactly as long as the supplier's alternatives are worse. Sustained negative changes in payables while sales grow would say the terms had moved.

Costco's leverage in that negotiation is very high and comes from the same place as everything else here: with fewer than 4,000 slots, losing Costco means losing an enormous block of volume at once. But leverage is not universal. Fresh foods are $37,988 million of net sales2 and are bought from producers with short cash cycles and little ability to extend credit. Categories where supply is genuinely scarce — and Costco names them, noting that "because of our efforts to adhere to high-quality standards for which available supply may be limited, particularly for certain food items, the large volumes we demand may not be consistently available"3 — invert the bargaining position entirely.

There is also a rate effect that cuts the other way. Costco explicitly trades some of the float for early-payment discounts, which is the right choice when the discount exceeds the return on cash and the wrong one when it does not. Interest income was $469 million in fiscal 2025, down from $533 million on lower rates4, so the value of holding cash rather than paying early falls as rates fall.

Inside the cash flow statement, look at the annual change in accounts payable: a positive $404 million in fiscal 2025 against $1,938 million in 20245. Sustained negative changes while sales grow would say the terms had moved against Costco.

References
  1. ReportedFree supplier financing is only free while the supplier accepts it, and Costco's own filings acknowledge that the change in net investment in merchandise inventories is "impacted by several factors, including inventory levels and turnover,...
    Costco Form 10-K, fiscal year ended August 31, 2025 - Item 7 MD&A (net sales $269,912M, membership fees $5,323M, gross margin 11.12%, SG&A 9.25%, comparable-sales composition, capital expenditure, dividends and repurchases) — FY2025 · publ. October 8, 2025 · source ↗
  2. ReportedFresh foods are $37,988 million of net sales and are bought from producers with short cash cycles and little ability to extend credit.
    Costco Form 10-K, fiscal year ended August 31, 2025 - consolidated financial statements and notes (income statement, balance sheet, Note 11 segment reporting, disaggregated revenue by merchandise category, legal proceedings) — FY2025 · publ. October 8, 2025 · source ↗
  3. ReportedCategories where supply is genuinely scarce — and Costco names them, noting that "because of our efforts to adhere to high-quality standards for which available supply may be limited, particularly for certain food items, the large volumes...
    Costco Form 10-K, fiscal year ended August 31, 2025 - Item 1A Risk Factors (U.S. and Canada 86% of net sales and 84% of operating income, California 26% of U.S. net sales, cannibalisation, tariffs, supplier and site-acquisition risk, 'high market expectations') — FY2025 · publ. October 8, 2025 · source ↗
  4. ReportedInterest income was $469 million in fiscal 2025, down from $533 million on lower rates, so the value of holding cash rather than paying early falls as rates fall.
    Costco Form 10-K, fiscal year ended August 31, 2025 - Item 7 MD&A (net sales $269,912M, membership fees $5,323M, gross margin 11.12%, SG&A 9.25%, comparable-sales composition, capital expenditure, dividends and repurchases) — FY2025 · publ. October 8, 2025 · source ↗
  5. ReportedInside the cash flow statement, look at the annual change in accounts payable: a positive $404 million in fiscal 2025 against $1,938 million in 2024.
    Costco Form 10-K, fiscal year ended August 31, 2025 - consolidated financial statements and notes (income statement, balance sheet, Note 11 segment reporting, disaggregated revenue by merchandise category, legal proceedings) — FY2025 · publ. October 8, 2025 · source ↗
Sources
Generated September 23, 2026