What Is Free Cash Flow: The Real Cash a Business Generates
Free cash flow is the cash left after a business has covered the investment needed to maintain operations. We explain how to calculate it, why it is harder to fake than accounting profit, and how to use it.
Profit can be painted, cash is hard to fake
A business can report large profit yet still run out of cash — it sounds absurd, but it happens often. The reason: accounting profit contains many assumptions and non-cash entries. Free cash flow (FCF) measures something more real: the actual cash a business has left to use. It is one of the metrics value investors trust most.
What free cash flow is
FCF is the cash left after a business has spent what it needs to maintain and run its operations.
FCF = Operating cash flow minus Capital expenditure (CapEx)
- Operating cash flow comes from the cash flow statement.
- CapEx is cash spent to buy and maintain plant, machinery, and equipment.
The surplus is cash the business is free to use: pay dividends, buy back shares, repay debt, or invest to expand.
Why FCF matters
- Harder to dress up than profit: profit is affected by depreciation, revenue recognition, and accruals; FCF tracks the actual cash moving in and out.
- The foundation of valuation: DCF valuation discounts exactly future free cash flow to arrive at business value.
- Shows true health: a business generating steady positive FCF funds itself, without depending on borrowing or issuing new shares.
How to read FCF
- Positive and rising FCF: a sign of a healthy business, often paired with a competitive moat.
- Negative FCF: not always bad — a growing company may spend heavily on CapEx to expand. You need to see whether it is negative because of investing for the future or a weak core business.
- Profit rising but FCF not keeping up: a red flag — paper profit may not be turning into real cash.
FCF and dividends
A sustainable dividend must come from FCF, not from borrowing. If a business pays dividends above its FCF for years, that is a sign the dividend is hard to maintain. Cross-checking FCF against the payout ratio gives a clearer picture than profit alone.
A related measure: FCF yield
Dividing FCF by market capitalization gives FCF yield — how much cash a business generates relative to its market price. A high FCF yield can signal a cheap stock, similar to how other valuation multiples are used.
Conclusion
Free cash flow is the cash left after a business covers the investment needed to maintain operations — a "real cash" measure that is harder to fake than accounting profit. Positive, stable, rising FCF signals a healthy business and is the basis for valuation. When profit and cash flow diverge, trust the cash flow.
Next step
Found a business that generates strong cash? Accumulate steadily to capture compounding.
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