Operating cash flow is the actual cash a business generates from its core operations during a specific period, after accounting for all operating expenses paid out in cash but before accounting for investing activities or financing transactions. It tells you how much real money the business produced from selling its products or services, stripped of the accounting adjustments that affect net income but involve no cash movement. A company can report a profit and generate negative operating cash flow. A company can report a loss and generate positive operating cash flow. Operating cash flow is closer to the truth about a company's financial health than either number alone.
The cash flow statement presents operating cash flow using one of two methods: the indirect method or the direct method. Nearly all public companies use the indirect method because it starts from a number already on the income statement.
The indirect method calculation works as follows:
The direct method lists actual cash receipts from customers and actual cash payments to suppliers and employees without the accounting bridge from net income. It is more transparent but requires more detailed records, which is why most companies avoid it.
Two categories of adjustments create the gap: non-cash charges and working capital movements.
Depreciation is the clearest example of a non-cash charge. When a company buys a $10 million piece of equipment, it does not record a $10 million expense immediately. Under accrual accounting, it spreads that cost over the asset's useful life, recording perhaps $1 million per year in depreciation expense. That $1 million reduces net income every year even though no cash leaves the business in those subsequent years. Adding depreciation back to net income in the operating cash flow calculation corrects for this distortion.
Working capital changes capture the timing mismatch between when revenue is recognized and when cash actually arrives. A company recognizes revenue when it ships goods, but the customer pays 60 days later. That gap shows up as an increase in accounts receivable, which operating cash flow subtracts from net income.
Operating cash flow includes all cash from operations before any capital spending. Free cash flow subtracts capital expenditures from operating cash flow to show what remains after the company has reinvested in the assets needed to maintain and grow the business.
If operating cash flow is $500 million and capital expenditures are $200 million, free cash flow is $300 million. That $300 million is what the company can use to pay dividends, buy back shares, pay down debt, or make acquisitions. Free cash flow is more useful for assessing a company's capacity to return value to shareholders. Operating cash flow is more useful for assessing the core business's cash generation before investment decisions.
A sustained gap between net income and operating cash flow is a warning sign. If net income consistently exceeds operating cash flow by a large margin, the company may be recognizing revenue faster than it is collecting cash, building up receivables that may never be collected, or capitalizing expenses that should flow through the income statement.
Some of the most significant accounting frauds in history involved manipulating the relationship between net income and operating cash flow. Enron repeatedly reported strong earnings while generating negative or weak operating cash flow, a disconnect that analysts who looked past the income statement identified years before the collapse.