Working capital is current assets minus current liabilities. It measures the gap between a company's short-term resources and obligations on a specific date. It isn't the same as cash on hand or cash generated over a quarter. A business can collect a customer invoice, pay a supplier, and end up with a different cash balance without changing its working capital at all.
The mix matters as much as the total. Inventory still has to sell, and a subscription paid in advance is a different kind of obligation from debt due next month. You can use a balance-sheet guide to locate the two totals, then check the notes to see what sits inside them.
Key Takeaways
- Working capital equals total current assets minus total current liabilities on the same reporting date.
- A positive balance doesn't mean that all current assets are available as cash.
- A negative balance can reflect advance customer payments or near-term cash pressure. The line items help you tell them apart.
- Collecting an invoice or paying a supplier can change cash without changing total working capital.
- Operating working capital can exclude cash and debt. Check the definition before comparing figures.
How do you calculate working capital?
Subtract total current liabilities from total current assets. The SEC's Beginners' Guide to Financial Statements uses this formula. Use figures from the same balance sheet, date, and currency, and check whether the company reports in dollars, thousands, or millions.
Current assets often include cash, accounts receivable (amounts customers owe), and inventory. Current liabilities can include accounts payable (amounts owed to suppliers), debt due soon, and obligations to deliver products or services already paid for. Those items appear in the same part of the balance sheet, but they don't all turn into cash or require a cash payment at the same time.
This calculation is also called net working capital. It's a dollar amount. The current ratio divides the same asset total by the same liability total. With $200,000 in current assets and $150,000 in current liabilities, working capital is $50,000 and the current ratio is about 1.33. Neither measure tells you when an invoice will be paid or whether inventory will sell at its recorded value.
How can cash change while working capital stays flat?
Collecting a receivable swaps one current asset for another: cash goes up, and receivables fall by the same amount. Paying a supplier with cash lowers both current assets and current liabilities. In both cases, the difference between the two totals stays the same.
Suppose a business starts with $40,000 in cash, $60,000 in customer invoices, and $100,000 in inventory. It owes suppliers $90,000 and has $60,000 of short-term debt. It collects $40,000 from customers, then pays $30,000 to suppliers. All amounts below are hypothetical, in thousands of U.S. dollars.
| Balance-sheet item | Before | After collection | After payment |
|---|---|---|---|
| Cash | 40 | 80 | 50 |
| Accounts receivable | 60 | 20 | 20 |
| Inventory | 100 | 100 | 100 |
| Total current assets | 200 | 200 | 170 |
| Accounts payable | 90 | 90 | 60 |
| Short-term debt | 60 | 60 | 60 |
| Total current liabilities | 150 | 150 | 120 |
| Working capital | 50 | 50 | 50 |
Cash rose by $10,000, but the gap stayed at $50,000. A balance sheet shows the result at a point in time; a cash-flow statement shows cash movements over a period. That distinction is also useful when you look at how free cash flow is calculated: the cash-flow figure isn't the change in the balance-sheet gap.
Why business models matter: Costco and Wiley
When customers pay and when a company has to spend can shape what its working capital means. The examples use reported balance-sheet totals in millions of U.S. dollars. Wiley reports its figures in thousands; the table converts them to millions. These are snapshots on different dates, not a ranking of liquidity.
| Company and balance-sheet date | Current assets | Current liabilities | Working capital |
|---|---|---|---|
| Costco Form 10-K, Aug. 30, 2026 | 46,582 | 43,952 | 2,630 |
| Wiley Form 10-K, Apr. 30, 2026 | 419.665 | 778.947 | −359.282 |
Costco: inventory can sell before the supplier bill comes due. Costco describes often selling inventory before it has to pay suppliers. That can shorten the stretch during which cash is tied up in merchandise. It doesn't mean every item sells before payment, and it doesn't explain the company's entire $2.63 billion working-capital balance.
Wiley: some cash arrives before the service is delivered. Wiley reported $451.4 million in current contract liabilities at April 30, 2026. These mainly came from subscriptions for which the company had already collected cash. The liability represents an obligation to provide what customers paid for; it isn't the same as owing a lender $451.4 million. Delivering those products and services can still cost cash. The distinction is easier to see once you separate revenue from profit.
Reporting dates matter too. In its quarterly filing for July 31, 2026, Wiley reported working capital of about negative $250.6 million, compared with negative $359.3 million at April 30. Management attributed the change primarily to seasonality. A less negative balance on its own doesn't establish an improvement in financial health.
What is operating working capital?
Operating working capital focuses on current assets and liabilities tied to running the business. Definitions vary. In Aswath Damodaran's NYU Stern notes, the noncash measure excludes cash and interest-bearing short-term debt. The goal is to separate cash tied up in operations from financing balances.
For the hypothetical above, define a simple operating measure as inventory plus receivables minus payables. It starts at $70,000 ($100,000 + $60,000 − $90,000), falls to $30,000 after the customer pays, then rises to $60,000 after the supplier is paid. Broad working capital stays at $50,000 throughout. The operating measure changes because it leaves cash out while still counting the receivable and payable.
That three-line version isn't universal. An analysis might include other operating balances, such as contract liabilities, depending on its purpose. If you see a working-capital adjustment in a valuation or cash-flow analysis, check which line items it includes and whether it refers to a balance or a change over time.
What should you check beyond the number?
Start with the components, then check how they've moved. A positive balance can include slow-moving stock or invoices that are hard to collect. A negative balance driven by debt coming due or overdue supplier payments raises different questions from one driven by cash collected for subscriptions.
- Match the periods. Compare the same quarter across years when the business is seasonal. Check dates and units before comparing two companies.
- Read the notes. Look at what is owed in cash, what is owed in goods or services, and when obligations come due. A debt-to-equity ratio addresses a different question about financing.
- Cross-check cash flow. See whether cash collected and cash paid tell the same story as the balance-sheet changes. A rise in receivables isn't itself a cash receipt.
If you follow a company through Insider Trading Alerts, use the public filing to identify what was reported, then go to the company's financial statements for its working capital. The SEC's bulletin on Forms 3, 4, and 5 explains why these ownership disclosures serve a different purpose.
Insider Trade Alerts summarizes public Form 4 activity. You can use our SEC Form 4 guide to understand an ownership report, but use the company's 10-K or 10-Q for current assets, liabilities, and notes.
This article is for education and research. Public filings are research records, not investment advice or recommendations to buy, sell, or hold securities.