Reading a cash flow statement in thirty seconds
Three blocks, three signs. The combination of pluses and minuses tells you what kind of company you are looking at before you read a single figure.
What you'll take away
- Profit is an opinion about timing; cash is a bank balance. The two legitimately differ, and the gap is where you learn something.
- Free cash flow = operating cash flow − capital expenditure. That is the money that could leave the building.
- Net income persistently above operating cash flow is the single most reliable warning sign on the statements.
Three blocks
A cash flow statement has exactly three sections, and they answer three different questions about the same year.
- Operating — did the core business bring in cash this year? This is the one that has to be positive.
- Investing — did the company spend cash on assets, or sell them off? Normally negative for a healthy, growing business.
- Financing — did cash come from lenders and shareholders, or go back to them? Negative here can mean debt repayment, dividends or buybacks — all three are returns of cash.
You do not need the magnitudes to start. The three signs alone narrow a company down to one of a handful of situations.
The sign-combination check
| Op | Inv | Fin | Most likely situation |
|---|---|---|---|
| + | − | − | Mature and self-funding: operations pay for investment and still return cash |
| + | − | + | Growing on outside money: operations work, but expansion needs capital |
| + | + | − | Shrinking or restructuring: selling assets to pay down debt |
| − | − | + | Burning cash: operations consume it, financing keeps the lights on |
| − | + | + | Distress: selling assets and raising money because operations do not fund themselves |
From net income to operating cash flow
The operating section starts at net income and walks it to cash. Two kinds of adjustment do nearly all the work.
- Add back non-cash charges. Depreciation and amortisation reduced profit without any money leaving, so they come straight back. This is why a capital-heavy business can show thin profit and strong cash.
- Adjust for working capital. Here the sign rule is worth memorising: an increase in an asset eats cash, an increase in a liability releases cash. Receivables up means you sold and have not been paid. Inventory up means cash is sitting on a shelf. Payables up means you are holding someone else’s money.
A gap between profit and operating cash in any one year is normal — a big December order, a warehouse stocked ahead of a season. A gap in the same direction for several years is not noise. If net income keeps printing above operating cash flow, profit is being recognised faster than cash is arriving, and sooner or later one of those two numbers has to give.
Free cash flow, and the number under it
free cash flow = operating cash flow − capital expenditure
Operating cash of 300 less capex of 120 gives free cash flow of 180.
Free cash flow is what the business could hand to its owners after paying for the assets it needs. It is the input to two of the three valuation models on this site, which is why it is worth knowing where it can mislead.
The subtraction treats all capital expenditure as the same, and it is not. Some capex keeps the existing business running; some builds a business that does not exist yet. Take a company with 300 of operating cash. Of its 250 of capex, 50 maintains the current operation and 200 builds a new plant. Reported free cash flow is 50, which looks weak. The cash the current business actually throws off is 250. Nothing is wrong with the statement — the two kinds of spending simply arrive in the same line.
This is the problem owner earnings exists to solve, and it is the reason one of the three models deliberately uses maintenance capital expenditure only.
Reading ten years of it
One year of free cash flow tells you almost nothing — a single large project or a single good collection quarter dominates it. Ten years has a shape, and there are five shapes worth recognising.
- Positive every year and rising. The case worth studying. Check that the rise is not purely capex being deferred.
- Positive every year and flat. A toll booth. Unexciting and often mispriced, because flat does not generate headlines.
- Positive but lumpy. Normal for anything that builds things. Use a three-to-five-year average rather than the latest year.
- Negative in the growth years, turning positive. Potentially the best outcome and the hardest to hold. Verify the investment is actually producing returns before you credit the story.
- Negative most years. Whatever else is true, the business has not funded itself for a decade. No valuation model here applies.
A four-step pass over the statement takes about five minutes and settles most companies: check the three signs across several years, check operating cash against net income, compute free cash flow, then look at ten years of it. If anything in those four steps contradicts the income statement, that contradiction is now the most interesting thing about the company.
Worked examples use invented figures to make the arithmetic visible. Moatrics covers US-listed companies.
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