Free cash flow (FCF) is the cash a company generates from its operations after paying for the equipment and property it needs to keep running. The usual formula is cash from operating activities minus capital expenditures. Investors watch it because profit can look strong on paper while cash is short.
You read that a company earned a healthy profit, then noticed its bank balance fell. Both can be true. Profit is an accounting measure, and cash is what pays the bills, the debt and the shareholders. Free cash flow is a way to see the second one.
How do you calculate free cash flow?
Take cash from operating activities and subtract capital expenditures, often shortened to capex. Both figures are on the cash flow statement. The SEC's Beginners' Guide to Financial Statements explains that this statement reports a company's inflows and outflows of cash and is split into three parts: operating, investing and financing activities.
Here is a made-up example with round numbers, not a real company:
| Line (hypothetical, in millions) | Amount |
|---|---|
| Net income | $80 |
| Add back depreciation (non-cash) | $30 |
| Change in working capital | -$10 |
| Cash from operating activities | $100 |
| Capital expenditures (new equipment) | -$60 |
| Free cash flow | $40 |
The company shows $80 million in profit but has $40 million in free cash after paying for equipment. If capex rose to $95 million, FCF would shrink to $5 million with no change in profit.
Where do you find the numbers?
Both inputs come from a company's annual report (10-K) or quarterly report (10-Q), which are free on the SEC's EDGAR database.
Cash from operating activities
The SEC guide says this section reconciles net income to the actual cash the company received from or used in operations. It adjusts for non-cash items, such as adding back depreciation, and for changes in operating assets and liabilities.
Capital expenditures
Look in the investing section. The SEC guide notes that investing activities generally include purchases or sales of long-term assets such as property, plant and equipment. Purchases of equipment appear as cash outflows. The line is often labelled "purchases of property and equipment" or similar.
For a walkthrough of the filings, see how to read a 10-K and how to read a 10-Q.
Why do investors care about free cash flow?
FCF shows how much cash is available for everything beyond maintaining the business. A company with positive free cash flow can pay down debt, pay dividends, buy back shares or fund growth without borrowing or selling new shares. A company with negative FCF has to cover the gap some other way.
The SEC guide makes the underlying point: an income statement can tell you whether a company made a profit, while a cash flow statement can tell you whether the company generated cash. FCF narrows the cash flow statement down to one number about what is left over.
What are the limits of free cash flow?
Free cash flow is a useful signal but an incomplete one. Check each of these before you rely on it.
- No single official definition. FCF is not a line item in the standard financial statements. Companies and analysts define it a little differently, so check the definition in the filing before comparing two firms.
- One year can mislead. A company that delays equipment purchases can show a high FCF this year and pay for it later. Look at several years.
- Growth spending looks like a weakness. A company investing heavily in new capacity may have low or negative FCF now and stronger cash later, or it may not. FCF cannot tell you which.
- Working capital swings. A one-time change in receivables or inventory can move operating cash flow a lot in a single quarter.
- Industry differences. Capital-heavy businesses such as manufacturers need far more capex than software or service companies, so compare within an industry.
None of this makes FCF unreliable. It means the number is a starting point for questions rather than a verdict.
How does free cash flow compare with earnings?
Earnings and free cash flow measure different things, and the gap between them is informative.
| Net income (earnings) | Free cash flow | |
|---|---|---|
| Based on | Accounting rules and accruals | Actual cash moving in and out |
| Includes non-cash items like depreciation | Yes | Adjusted out |
| Includes equipment purchases | Only gradually, through depreciation | Fully, in the year paid |
| Best for | Judging profitability | Judging cash available |
If earnings keep rising while free cash flow stays flat or falls for several years, the likely explanations are rising capex, slower customer payments or growing inventory, and each is worth reading about in the filing's management discussion. The P/E ratio guide covers a common earnings-based valuation measure, and some investors compare it with price relative to free cash flow.
A short FCF checklist
- Find cash from operating activities on the cash flow statement.
- Find purchases of property and equipment in the investing section.
- Subtract the second from the first.
- Repeat for the last three to five years.
- Compare to peers in the same industry and read management's explanation of any big change.
This is educational and not a recommendation about any company. Investing involves risk, including the possible loss of principal.
Frequently asked questions
Is free cash flow the same as profit?
No. Profit is net income under accounting rules, while free cash flow measures actual cash left after capital spending. A company can report a profit and still have little free cash flow.
Can free cash flow be negative?
Yes. It is negative when capital spending is larger than operating cash flow. That can be a warning sign or a result of heavy growth investment, so read the filing to see why.
Is higher free cash flow always better?
Not always. High FCF can come from postponed investment or one-time changes in working capital. Look at several years and at what management says about spending.
Where do I find free cash flow on a 10-K?
It is usually not a separate line. Take cash from operating activities and capital expenditures from the cash flow statement and subtract. Some companies also report their own FCF figure in the discussion section, with their definition.
Related: How to read a 10-K annual report · How to read a 10-Q quickly · What is the P/E ratio?