Negative working capital

Analysts define operating working capital a little differently from textbooks:

Operating WC = inventory + trade receivables (+ other operating current assets) − trade payables (− other operating current liabilities)

It leaves out cash and debt on purpose, because those are financing items. What's left is the money trapped in the machine: stock on shelves and invoices awaiting collection, minus the bills you haven't paid yet. Now the important part. Working capital can be negative. If suppliers and customers together put more money into your operating cycle than you've tied up in it, your operations become a source of funds. It's an interest-free, permanent loan that grows with you. Analysts call it float.

Which companies run on negative working capital?

Three real companies earn negative working capital legitimately. One is Indian and two are global:

• Hindustan Unilever (illustrative, ~FY24 scale): inventory ~₹4,000 cr and receivables ~₹3,000 cr against trade payables ~₹9,300 cr. Distributors pay almost at once. HUL's brands are must-stock, and channel financing keeps distributor credit off HUL's books. Suppliers, meanwhile, wait ~3 to 4 months to serve India's largest FMCG buyer. Operating WC ≈ −₹2,300 cr, so the supply chain is in effect paying HUL to run its own operations, and the float grows every year that sales grow.
• Costco: trade payables of ~$19.5bn exceed the entire inventory of ~$18.5bn, so suppliers finance more than 100% of the shelf. Add ~$2.5bn of deferred membership fees, paid by customers a year in advance for the right to shop. That current ratio of 0.97 is other people's money doing Costco's work.
• Amazon (mention, check against the 10-K): the classic negative cash cycle. It collects from customers at order and pays suppliers weeks later. Historically its CCC ran around −20 to −30 days, and that cycle funded growth.

What turns this into strength is velocity plus power. Inventory has to move fast and reliably the way groceries do, which fashion doesn't. Customers have to pay instantly or in advance. And supplier credit has to be offered willingly, because you're the channel nobody can afford to lose. When all that holds, a sub-1 current ratio just says the cycle refinances itself daily.

How do you tell real float from distress?

A struggling capital-goods company can counterfeit that float by not paying its suppliers. Its payables stretch because the cash isn't there. Same sign, opposite meaning. You separate the two with a checklist:

1. Direction and speed. Float businesses show stable payables days for years. Distress shows DPO lurching upward, from 55 to 70 to 95 days, while revenue stalls.
2. Who has the power? HUL commands terms from a fragmented supplier base. A mid-cap auto-ancillary "commanding" 95-day terms from bigger suppliers is really defaulting slowly.
3. India's built-in tell. Schedule III requires disclosure of dues to micro and small enterprises (MSME). It also requires disclosure of the interest payable under the MSMED Act on amounts outstanding beyond 45 days. A growing "interest due on delayed MSME payments" line is stretched-payables distress in plain sight. The 2021 Schedule III amendments also mandate ageing schedules for payables and receivables. Read them.
4. Cash flow confirms. Real float shows up as strong CFO alongside the negative WC. A distress stretch shows weak or negative CFO with a one-off payables "benefit" inside it. Later, the cash-flow work and its shenanigans sequel formalize this.

Why does DMart pay its suppliers in a week?

DMart is the deliberate opposite, and that's what makes the two of them the perfect teaching pair. DMart could stretch its suppliers like every other large retailer. Instead it pays them in about a week, an illustrative DPO ≈ 7 days against 30 to 60 for peers. Why give up free float? Early payment buys lower purchase prices. Those fund DMart's everyday-low-price positioning, and that positioning drives the ~11× inventory turns and near-zero receivables that keep its cycle lean anyway. DMart chooses a small positive working-capital cycle, financed by its own nearly debt-free balance sheet. It's the price of a cost moat.

Costco takes the float and passes the savings through its membership economics. It's the same industry with elite economics in both. The working-capital numbers are how you read the strategy off the balance sheet. That's what "working capital as a story" means. The cash conversion cycle puts numbers on both.