ValueWhy free cash flow is the number that matters
Net income is an opinion; cash is a fact. Accounting profit includes non-cash charges, timing differences, and management judgment about depreciation schedules and provisions. Free cash flow strips most of that away and asks the only question an owner ultimately cares about: after paying for everything the business needs to keep running, how much cash is left for me?
That is why every discounted cash flow model projects FCF, not earnings. Dividends, buybacks, debt paydown, and acquisitions are all paid out of free cash flow. A company can report rising earnings for years while its FCF shrinks, and the cash flow statement is where that shows up first.
The FCF bridge, line by line
The bridge starts from net income and adjusts it toward cash reality:
- Net income is the starting point because it already includes revenue and most expenses. But it was computed on an accrual basis, meaning revenue counts when earned and expenses when incurred, not when cash moves.
- Plus depreciation and amortization. These are accounting charges for past investments (a factory bought years ago, expensed a slice at a time). No cash leaves the business this year for them, so they get added back.
- Minus the increase in working capital. If receivables and inventory grew by $25M more than payables did, that $25M of profit is sitting in customers' hands and warehouses, not in the bank. Growing businesses constantly reinvest cash this way.
- Minus capital expenditures. The cash actually spent this year on long-lived assets. Unlike depreciation, this is real money out the door, so it comes off in full.
What remains is the cash the business generated that its owners could, in principle, take home.
FCF vs net income vs operating cash flow
| Measure | What it is | What it misses |
|---|---|---|
| Net income | Accounting profit | Non-cash charges, timing of cash collection, capex |
| Operating cash flow | Cash from operations | The capex needed to sustain the business |
| Free cash flow | Cash left after maintaining the business | Nothing major; this is the owner-relevant number |
Operating cash flow looks generous for capital-intensive businesses because it ignores the factories and equipment the cash flow depends on. FCF is the stricter, more honest measure, which is why valuation uses it.
How this feeds a DCF
The number in the hero box is the starting point of a DCF valuation: you project this FCF forward for an explicit forecast period, estimate a terminal value for everything after, and discount it all back at the WACC. If the FCF figure is wrong, everything downstream is wrong, so it is worth building the bridge from the actual financial statements rather than guessing.
Limitations
- Lumpy capex distorts single years. A company that builds a factory every five years will show terrible FCF in the build year and great FCF otherwise. For valuation, normalize capex (use a multi-year average) rather than taking one year at face value.
- Working capital timing is noisy. A big receivables balance at year-end might just reflect when invoices went out. Look at the trend over several years, not one snapshot.
- Maintenance vs growth capex matters. Warren Buffett's "owner earnings" concept adjusts further: only the capex needed to maintain the business should be subtracted; growth capex is optional investment. Financial statements rarely split the two, so this takes judgment.
- FCF can be gamed short-term. Stretching payables (paying suppliers late) boosts this year's FCF at the cost of next year's. Persistent FCF with deteriorating supplier relationships is a red flag, not a buying signal.
Frequently asked questions
What is free cash flow in simple terms?
The cash a business has left after paying its bills and buying the equipment it needs to keep operating. It is the closest accounting gets to "profit you could actually put in your pocket."
Is free cash flow the same as operating cash flow?
No. Operating cash flow is cash from day-to-day operations; free cash flow subtracts capital expenditures as well. For asset-heavy businesses the difference is enormous, which is why valuation uses FCF.
What FCF yield should I look for?
Common rules of thumb put reasonable value territory above roughly 5%, with 8-10%+ being deep value or a sign something needs investigating. But a fast-growing company reinvesting everything can be fairly valued at a 1-2% yield. The yield is a screening tool, not a verdict.
Can I use this FCF directly in a DCF?
Yes, with one caution: normalize lumpy capex first. Take this year's FCF, check the last 3-5 years of capex, and if this year is an outlier, use an average. Then plug the normalized figure into the DCF calculator as the starting FCF.
What is the difference between free cash flow and net income?
Net income is an accounting measure that includes non-cash charges like depreciation and ignores capital spending. Free cash flow starts from net income, adds back non-cash charges, then subtracts capital expenditures and working capital changes, showing the cash the business actually generated.