Fundamentals · The financial statements
Working capital and the cash conversion cycle, with Apple’s numbers
What working capital is, how DSO, DIO, DPO and the cash conversion cycle work, why Apple’s negative working capital is a strength, and where its changes appear.
On this page
Working capital is the money tied up in running a business day to day: what customers owe, the inventory on the shelves and other short-term assets, minus what the company owes suppliers, employees and tax authorities in the near term. On the balance sheet it is simply current assets minus current liabilities. Behind that subtraction sits a timing question that matters to every business: how long cash is locked up between paying for inputs and collecting from customers.
Most companies have positive working capital and need more of it as they grow, so growth consumes cash. A few have the opposite. Apple ended fiscal 2025 (the year ended September 27, 2025) with negative working capital of $17,674 million and a cash conversion cycle of about −71 days: on year-end balances, it collects from customers and sells its inventory long before it pays its suppliers.
This page defines working capital and its two common versions, works through days sales outstanding, days inventory outstanding, days payable outstanding and the cash conversion cycle on Apple's filed numbers, explains when negative working capital is a strength and when it is a warning, and shows where changes in working capital land on the cash flow statement.
Two definitions
The first, the accounting definition, answers a liquidity question: could the company pay its next twelve months of obligations from assets that turn into cash within a year? It is the numerator-minus-denominator version of the current ratio.
The second strips out financing items. Cash and securities are investments, not operating needs, and commercial paper and current debt are borrowing, not trade credit. What remains is the capital the business itself requires. Analysts building cash flow forecasts or a Discounted cash flow (DCF): a step-by-step valuation on Apple model use this operating version.
The operating version is more negative because Apple's large cash pile partly hides how much of its business is funded by suppliers and other short-term creditors.
The cash conversion cycle
Three ratios translate balance-sheet amounts into days:
DIO and DPO divide by cost of sales because inventory and payables are carried at cost; DSO divides by revenue because receivables are carried at selling prices. The cycle answers one question: from the day a company pays a supplier to the day a customer pays it, how many days is its own cash tied up? A negative answer means customers pay first.
Year-end or average balances?
The example uses balances on the last day of the year, which is simple but can be skewed by a strong or weak final quarter. Many analysts use the average of the opening and closing balances instead. For Apple's fiscal 2025 that gives DSO 32.1 days (average receivables 36,593.5), DIO 10.7 (average inventory 6,502) and DPO 114.7 (average payables 69,410), for a CCC of about −71.8 days. The conclusion is the same here; for seasonal or fast-growing companies the choice can matter more. Pick one method and use it consistently.
What the numbers mean for Apple
Apple carries little inventory on its own balance sheet, about nine days of cost of sales; its 10-K says outsourcing partners, mainly in Asia, manufacture substantially all of its hardware. Its receivables are collected in about a month. But it pays for components and assembly on terms that leave payables equal to about 115 days of cost of sales. One way to picture the gap: Apple's cost of sales averaged about $605 million a day in fiscal 2025, so 71 days of supplier financing is on the order of $43 billion of cash the business does not need to supply itself.
Two caveats. Apple's cost of sales includes services costs, which do not create payables in the same way, so DPO is an approximation. And Apple also reports vendor non-trade receivables of $33,180 million, amounts owed by manufacturing partners that buy components from Apple's suppliers, which the standard DSO ignores. The cycle is a useful lens, not an exact clock.
Strength or warning sign?
The same negative number can mean opposite things.
A strength when it comes from bargaining power and speed. A company with scale, fast inventory turns and customers who pay promptly can push suppliers to longer terms and grow without tying up cash. Each extra dollar of sales then brings in cash before it costs any. Apple, large retailers and many subscription businesses fit this pattern.
A warning when it comes from weakness. A struggling company may stretch payables because it cannot pay on time, run down inventory it cannot afford to replace, or lean on short-term borrowing. Signs that point to trouble rather than strength: falling cash, rising short-term debt, suppliers demanding cash on delivery, and DPO rising while revenue falls. Negative working capital with a thin cash balance and shrinking sales is a liquidity risk.
The test is to ask why the number is negative and whether the company could survive if suppliers tightened terms. Apple, with $132,420 million of cash and marketable securities at the end of fiscal 2025, could; a weak company might not.
Changes in working capital on the cash flow statement
Working capital links the balance sheet to the cash flow statement. When a current asset rises, cash went into it; when a current liability rises, cash was kept. The operating section shows these changes after the non-cash adjustments.
That −25,000 swing, against +3,651 a year earlier, is the main reason Apple's cash from operations fell from $118,254 million to $111,482 million even as net income rose. The Free cash flow (FCF): definition, formula and Apple example page follows the effect through to free cash flow. Note that these lines include non-current items and other balances, so they will not exactly equal the change in the balance-sheet working capital figure.
Working capital next to related measures
| Measure | Formula | Apple fiscal 2025 | Reads |
|---|---|---|---|
| Working capital | Current assets − current liabilities | −$17,674M | Dollar liquidity cushion |
| Current ratio | Current assets ÷ current liabilities | 0.89 | Same idea as a ratio |
| Quick ratio | Liquid current assets ÷ current liabilities | 0.77 | Excludes inventory |
| Operating working capital | Excludes cash, securities and short debt | −$52,042M | Capital the operations need |
| Cash conversion cycle | DSO + DIO − DPO | −71 days | Speed of the cash cycle |
The Current ratio and quick ratio: measuring short-term liquidity page covers the ratio versions and why a current ratio below 1.0 is not alarming for Apple.
How Finabase does it
The Balance sheet card on the Financials tab lists current assets, current liabilities, receivables, inventory, payables and deferred revenue for each annual or quarterly period; select a row to chart its history and compute working capital or the day counts yourself, pairing them with revenue and cost of revenue from the Income statement card. The Cash flow card shows operating cash flow. Ten fiscal years of Current Ratio and Quick Ratio are charted on the Valuation tab. Finabase does not calculate DSO, DPO or the cash conversion cycle for you.
Frequently asked questions
Is negative working capital good or bad?
It depends on why it is negative. It is a strength when a company turns inventory quickly, collects promptly and gets long supplier terms, as Apple does, and a danger sign when a company stretches payables because it is short of cash.
What is a good cash conversion cycle?
Shorter is better within an industry, because less cash is tied up in operations. Retailers, manufacturers and software companies have very different normal ranges, so compare a company with its own history and close peers rather than with a single number.
Why does an increase in accounts receivable reduce cash flow?
Revenue counted on the income statement but not yet collected sits in receivables. When receivables rise, the company has booked sales whose cash has not arrived, so the cash flow statement subtracts the increase from net income.
Should I use year-end or average balances for DSO and DPO?
Either works if you are consistent. Year-end balances are simpler and match the balance sheet; averages smooth out a strong or weak final quarter. For Apple's fiscal 2025 the two methods give a cash conversion cycle of about −71 and −72 days.
Summary
Working capital is current assets minus current liabilities, the short-term capital a business ties up to operate. Apple's was −$17,674 million at the end of fiscal 2025, and its cash conversion cycle was about −71 days: inventory 9.4 days plus receivables 34.9 days, minus payables 115.4 days. For Apple, negative working capital means suppliers finance its operations, a sign of bargaining power backed by a large cash cushion; for a weak company the same figure can signal trouble. Changes in working capital flow through the cash flow statement, where in fiscal 2025 they absorbed $25,000 million of Apple's cash.