What Is Free Cash Flow?

Free cash flow (FCF) is the cash a company generates from operations after subtracting what it spends on property, equipment and other capital assets. It is the money genuinely available to pay dividends, buy back shares, repay debt, or reinvest — cash that is actually in the bank, not accounting profit.

It matters because EPS can be shaped by accounting choices. Cash is much harder to manufacture.

How free cash flow is calculated

The standard formula:

FCF = Cash flow from operations − Capital expenditures

Both figures come straight off the cash flow statement, which is why FCF is harder to massage than earnings.

A worked example. A company reports $8 billion in operating cash flow and spends $3 billion on capital expenditure:

$8,000,000,000 − $3,000,000,000 = $5 billion FCF

That $5 billion is what the business actually produced for its owners that year.

Why it differs from net income

Net income and cash flow diverge for structural reasons, not just accounting games:

• Depreciation reduces net income but costs no cash in the current period.
• Working capital swings — a company that ships product but has not been paid yet books revenue while cash sits in receivables.
• Capital expenditure consumes cash immediately but hits earnings slowly, spread over years of depreciation.

A capital-intensive business can post healthy earnings and negative free cash flow for years. A software business often does the reverse.

Maintenance vs growth capex

Capital expenditure blends two very different things: spending to keep existing operations running, and spending to expand. FCF subtracts both.

That means a company investing aggressively in future growth can look poor on FCF while doing exactly the right thing. Companies rarely disclose the split between the two, so read a low FCF number alongside what the business is actually building.

What is a good free cash flow?

As with EPS, the absolute dollar figure means little on its own — a $500 million FCF is excellent for a mid-cap and unremarkable for a giant. Three normalised views are more useful:

FCF margin (FCF ÷ revenue) shows how much of each sales dollar becomes cash. Above 15% is typically strong; software businesses often exceed 25%, while retail and airlines run in low single digits. Compare within a sector.

FCF yield (FCF ÷ market cap) is the cash return on the price you pay, and works as a valuation check alongside the P/E ratio. A 5% FCF yield means the business throws off $5 in cash annually per $100 of market value.

FCF conversion (FCF ÷ net income) tests whether reported profit becomes real cash. Consistently near or above 100% is a quality signal. Persistently below — say 60% — is worth investigating: earnings are being reported that cash is not backing.

The most informative pattern is the trend. FCF growing steadily over five years says more than any single year's figure.

Where free cash flow misleads

It is lumpy by nature. A single large factory or acquisition can crush FCF in one year with no bearing on the underlying business. Read several years, not one.

It can be flattered by underinvestment. A company can boost FCF simply by not maintaining its assets. That works briefly and damages the business later. Rising FCF alongside falling capex over several years deserves scrutiny, not applause.

Working capital games shift it between periods. Delaying supplier payments to the far side of year-end lifts this year's FCF and depresses next year's. Nothing improved.

Definitions vary. Some sources subtract only maintenance capex; others adjust for stock-based compensation, acquisitions or leases. Two websites can report materially different FCF for the same company. Check the definition before comparing.

Negative is not automatically bad. Early-stage and heavily-reinvesting companies routinely run negative FCF. The question is whether the spending is building something.

See the inputs on real companies

Key Statistics on each stock page shows the profitability and valuation figures that sit alongside cash flow:

• NVDA · AAPL · MSFT · GOOGL · AMZN · META · TSLA

Read EPS against the cash flow statement in the company's own filings. Where reported earnings are strong but cash conversion is weak, the gap is the thing worth understanding.

Sources

• U.S. SEC (investor.gov) — How to Read a 10-K/10-Q — where the statement of cash flows sits in a filing
• FINRA — Stocks