Definition (canonical)
Working capital is the difference between a company's current assets and current liabilities: `Working capital = current assets − current liabilities`. It measures the buffer of short-term resources available to run daily operations — pay suppliers, hold inventory, and wait for customers to pay.
Reading the number
Positive working capital means short-term assets cover short-term debts; the operation funds itself with room to spare. Negative working capital means the company relies on money it has not yet paid out — supplier credit — to finance its cycle. That is dangerous for most firms, but a superpower for some: supermarkets and subscription businesses collect cash from customers before paying suppliers, so they operate healthily on negative working capital. Context and business model decide; the raw sign alone does not.
The three levers
Working capital lives in three accounts, each with its own lever:
- - Receivables — shorten payment terms, invoice immediately, chase systematically; every day cut from collection frees cash permanently.
- - Inventory — buy closer to demand; stock is cash sleeping on shelves.
- - Payables — negotiate longer supplier terms (without wrecking relationships); paying later is free financing.
The combined metric is the cash conversion cycle: days of inventory plus days of receivables minus days of payables — how long a dollar stays trapped in operations before returning as cash.
The growth trap
Fast growth devours working capital: more orders mean more inventory bought today and more receivables waiting tomorrow. Many companies fail not despite growth but because of it — profits rise while cash drains into the widening cycle. Watching working capital alongside cash flow and liquidity catches this early.
FAQ
Is more working capital always better? No — excess means idle cash and bloated inventory. The goal is sufficient, not maximal.
How is it different from cash? Cash is one component of current assets. You can be rich in working capital yet cash-poor if everything sits in inventory and unpaid invoices.
What financing fits a working capital gap? Short-term instruments: credit lines, factoring, trade credit — matched to the cycle, not long-term loans.
How often should working capital be reviewed? Monthly as a standing metric, and before every growth decision — a big new contract quietly commits months of cash to inventory and receivables before the first payment lands.
Related: Cash Flow · Liquidity · Balance Sheet · Payment Terms Reviewed: 2026-07-15 · Sources: IAS 1; corporate finance curriculum