Operating cash flow is the cash a business generated from running itself, before any spending on long-term assets. Free cash flow subtracts capital expenditure, leaving what is genuinely available to pay down debt, buy back shares or pay dividends. The difference between them is capex.
Where each sits on the statement
Operating cash flow is the subtotal at the end of the first section of the cash flow statement. It starts from net income and adds back non-cash charges such as depreciation and stock-based compensation, then adjusts for working capital movements.
Free cash flow is not a reported line. You calculate it by subtracting capital expenditure, found in the investing section, from operating cash flow. That one subtraction is the entire difference, and it is the reason the two numbers can tell opposite stories.
Why the gap matters more than either number
Capital expenditure is not optional for most businesses. A telecom network, a fleet of aircraft or a chain of stores wears out, and the spending required to stand still is a genuine cost of being in that business. Operating cash flow ignores it entirely.
So the ratio between them describes the business model. A software company converting 90% of operating cash flow into free cash flow is capital-light. A utility converting 20% is capital-heavy, and its impressive operating cash flow is largely spoken for before shareholders see any of it. Neither is bad; they are different businesses, and comparing their operating cash flow directly is meaningless.
Why companies prefer to quote operating cash flow
It is the larger number, and it is a reported subtotal rather than a calculation, which makes quoting it defensible. This is the same instinct behind EBITDA, which also excludes the cost of the assets. When a company leads with operating cash flow and does not mention capex, look up the capex yourself; that is where the story usually is.
The trap in both directions
Growth capex and maintenance capex sit in the same line, so free cash flow punishes a company investing heavily in genuine expansion exactly as hard as one merely replacing worn-out equipment. A company with depressed free cash flow because it is building capacity that will earn a high return on capital is doing the right thing, and the statement cannot tell you which case you are in. Reading several years, and reading what management says the spending is for, is the only way.
The opposite trap is a company flattering free cash flow by underinvesting. Cutting capex raises the number immediately and shows up as decay years later, which is why free cash flow rising while revenue stalls deserves suspicion rather than credit.
See the capex behind the cash flow
Stock Simplifier charts operating cash flow, capital expenditure and free cash flow together for any US stock, so the gap between them is obvious. Free to start.
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Frequently asked questions
Related
- Free cash flow, the full guide, including where it gets flattered.
- How to read a cash flow statement, where both numbers sit and what surrounds them.
- Owner earnings, Buffett's attempt to fix the maintenance capex problem.
- EBITDA vs free cash flow, the same argument one step further up the statement.