Introduction
In the year to June 2024, Super Micro Computer earned $1.15 billion of net income, nearly double the year before, as demand for its artificial intelligence (AI) servers surged. In the same year its operations consumed $2.49 billion of cash. The company was not losing money on its sales; it was spending cash on inventory and waiting for customers to pay long before the profit on those sales turned into cash. To keep growing, it raised about $4 billion from investors in shares and convertible notes.
That gap between profit and cash is the reason profitable companies can run out of money. Net income records revenue when it is earned and expenses when they are incurred, under the accrual basis of accounting; the bank balance records only cash actually received and paid. Most of the time the two move together over a few years. When a company grows quickly, extends credit to customers, builds stock ahead of demand or faces large debt maturities, they can diverge far enough to break it.
Where the Cash Went: Super Micro's Fiscal 2024
Super Micro's fiscal 2024 annual report shows exactly where a profitable year's cash went. The reconciliation from net income to operating cash flow, condensed:
| Line item | FY2024 |
|---|---|
| Net income | 1,153 |
| Non-cash items, net | 114 |
| Increase in accounts receivable | (1,589) |
| Increase in inventories | (2,900) |
| Increase in accounts payable | 679 |
| Other working capital, net | 57 |
| Net cash used in operating activities | (2,486) |
Source: Super Micro fiscal 2024 Form 10-K. Non-cash items include 232 of stock-based compensation and a 168 deferred tax benefit. Other working capital combines accrued liabilities, deferred revenue, taxes payable, prepaid expenses and other long-term liabilities.
The block shows the mechanics of a growth-driven cash drain. Inventory absorbed $2.9 billion: to meet orders for servers built around scarce graphics processing units (GPUs), the company bought components and built finished systems before it could ship them. Receivables absorbed another $1.6 billion, because sales on credit are recorded as revenue immediately but collected weeks later, and higher sales mean a larger balance waiting to be collected. Suppliers financed part of the build through $679 million of higher payables, but nowhere near enough.
The financing section shows how the gap was filled: about $2.3 billion from a public share offering, $1.7 billion from convertible notes and modest net bank borrowing. Cash on the balance sheet actually rose during the year. Super Micro avoided a cash shortfall because it could raise capital in a hot market. A company with the same profit and the same working capital build, but without access to investors, would have needed to slow its growth or default on its suppliers. How each working capital line converts into cash is covered in working capital on the cash flow statement.
Four Ways Profit Turns Into Less Cash
Growth in working capital is the most common reason for the gap, but not the only one. The main drains on a profitable company's cash are:
- Working capital growth: receivables and inventory rise with sales, absorbing cash before customers pay. The faster the growth, the larger the drain.
- Capital expenditure ahead of revenue: factories, stores and data centers are paid for before they produce revenue, and their cost reaches the income statement only gradually through depreciation.
- Debt principal: repayments of borrowing never appear on the income statement, so a profitable company with a large maturity it cannot refinance can still default.
- Profits recognized before cash is certain: aggressive revenue recognition, long-term contracts accounted for on estimated progress, and unrealized fair value gains on investments all produce profit that may never arrive as cash.
Each of these leaves net income unaffected or flattered while cash falls. The first two are signs of investment and can be healthy; the last two are the patterns behind many failures of companies that looked profitable to the end.
Debt Maturities Turn a Squeeze Into a Crisis
Debt is what converts a cash shortfall into a default. Interest is an expense and reduces profit, but repaying principal is not, so the income statement gives no warning of a maturity. A company generating $50 million a year of free cash flow with $300 million of bonds due next year is profitable and solvent only if lenders agree to refinance. If credit markets close, or if a covenant breach lets lenders demand early repayment, the same company can be forced into restructuring with its earnings unchanged. That is why bankers read the debt maturity schedule in the notes alongside the cash flow statement, as explained in debt on the balance sheet. The gap between earnings and cash makes the problem worse: the years when working capital absorbs most cash are often the years a company borrows most heavily, so its maturities grow just as its cash generation weakens.
The Growth Trap in Numbers
The working capital effect follows directly from the size of the balances a business must carry for each dollar of sales. Suppose a distributor holds receivables equal to 25% of annual sales, inventory equal to 20% and payables equal to 10%, so its net working capital is 35% of sales. It earns a 10% net margin and its sales grow from $100 million to $150 million.
The arithmetic gives a useful rule of thumb. A business funds its own growth only while its profit on the new sales covers the working capital those sales require. With a 10% margin and working capital at 35% of sales, growth above about 40% a year must be funded by borrowing or new equity, and capital expenditure lowers that ceiling further. Cutting the working capital intensity, by collecting faster, holding less stock or paying suppliers later, raises the growth rate the business can fund itself. The trade-off is explored through the cash conversion cycle in the blog's working capital explainer.
- Overtrading
Growing sales faster than a company's profits and available financing can support, so that receivables, inventory and capital spending absorb more cash than the business generates. An overtrading company can report rising profits while its cash runs out.
When Working Capital Hides the Problem
The opposite pattern is more dangerous. A company under pressure can make its cash flow look healthy by stretching payments to suppliers, which raises payables and lifts operating cash flow without any improvement in the business. The cash is real, but it is borrowed from suppliers, and it must be repaid.
Carillion, the British construction and outsourcing group, is the standard case. It reported cash conversion of 117% and net debt of just 0.8 times earnings before interest, taxes, depreciation and amortization (EBITDA) for 2016, as an M&G analysis of Carillion's accounts recounts. Behind those figures, the company had extended its payment terms to suppliers, nearly doubling them to as much as 120 days, while offering suppliers early payment through a bank-funded facility. Absolute free cash flow had been negative in two of the four years from 2013 to 2016. Less than ten months after its 2016 annual report, Carillion was in compulsory liquidation, in January 2018.
How supplier finance programs work and what US generally accepted accounting principles (US GAAP) now require companies to disclose about them is covered in supplier finance and factoring. The lesson for reading the cash flow statement is that the direction of a working capital change matters less than its cause. A receivables build from fast, genuine growth is a funding problem; a payables build from delayed payments is a solvency warning.
What Bankers Watch For
Bankers advising lenders, acquirers or the company itself look for the gap between profit and cash early, before it becomes a liquidity crisis. The most useful signals are:
- Cash conversion over several years: operating cash flow divided by net income, or free cash flow divided by EBITDA. A ratio persistently well below 100% means profits are not becoming cash.
- Working capital days: days sales outstanding (DSO), days inventory outstanding (DIO) and days payables outstanding (DPO), tracked quarter by quarter. Receivable or inventory days rising faster than sales are a warning; payable days rising sharply can be a hidden loan.
- Liquidity runway: cash plus undrawn credit lines, set against the cash the business will absorb and the debt that matures over the next year.
- Funding dependence: whether growth is financed by operations or by regular trips to equity and debt markets that may close.
The working capital ratios are explained in DSO, DIO and DPO, and the measures of short-term solvency, the current ratio, quick ratio and cash runway, in liquidity ratios.
Profit measures whether a business creates value over time; cash decides whether it survives long enough to deliver it. A company can be profitable for years and still fail in a single quarter if it cannot pay what is due, which is why bankers read the cash flow statement alongside the income statement and measure the growth a company can fund against the growth it plans, using the measures set out in free cash flow definitions.
