What free cash flow to the firm measures
FCFF is the cash a business could hand to everyone who financed it — lenders and shareholders together — after paying its taxes and making the investment needed to sustain and grow operations. The word that carries the meaning is unlevered: FCFF is calculated as though the company had no debt at all, so it measures the operating business rather than the financing decision layered on top of it.
That is precisely why enterprise valuation uses it. Discount FCFF at the weighted average cost of capital and you get enterprise value, a figure you can compare across companies with completely different capital structures. Its sibling, free cash flow to equity, deducts interest and net borrowing and is discounted at the cost of equity to give equity value directly. The CFA Institute equity valuation curriculum sets out both, and the distinction between them is the most frequently muddled point in the whole subject.
FCFF is also not the same thing as the “free cash flow” most financial data providers publish, which is usually cash flow from operations minus capital expenditure. That measure is levered: interest has already been paid out of CFO. Discounting it at the WACC double-counts the benefit of debt and inflates the valuation. If you take a free cash flow figure from a screener, check its definition before you feed it into a DCF model.
The two routes, term by term
Route one starts at EBIT, and it is the one you use when forecasting, because a forecast is built from margins rather than from a cash flow statement you do not yet have.
EBIT × (1 − t) gives NOPAT, the operating profit the business would keep if it were financed entirely by equity. Taxing EBIT rather than pre-tax income is deliberate: it strips out the tax deduction on interest, which belongs in the WACC rather than in the cash flow, and putting it in both places is the classic double-count.
Plus D&A reverses a charge that reduced profit but moved no cash. Add back any other material non-cash item on the same principle: share-based compensation charged to operating expense, asset impairments, non-cash restructuring provisions.
Minus CapEx deducts the cash actually spent on fixed assets. Depreciation is an accounting allocation of past spending; capital expenditure is this year's cheque.
Minus the increase in net working capital captures cash tied up in growth. When receivables and inventory rise faster than payables, cash sits in the operating cycle rather than in the bank. A release — a negative change — adds to FCFF instead. Exclude cash and short-term debt from the working capital definition; the first is the thing you are measuring and the second is financing.
Route two starts at cash flow from operations, and it is the one you use when reading a 10-K. CFO already contains D&A, working capital movements and cash taxes, so only two adjustments remain: add interest back after tax, because CFO under US GAAP is stated after interest paid, and subtract capital expenditure from the investing section. The after-tax adjustment is Interest × (1 − t) rather than the gross figure, because the interest deduction reduced the tax bill and only the net cost was actually borne.
The compact identity is worth memorising: FCFF = NOPAT − (CapEx − D&A + ΔNWC). The bracket is net reinvestment. It falls straight out of route one by collecting terms, and it makes the economics visible — a company converts operating profit into free cash flow to exactly the extent that it is not reinvesting.
Worked example: the same company built both ways
A manufacturer reports revenue of $6,000M, EBIT of $1,200M, D&A of $260M, capital expenditure of $380M, an increase in net working capital of $60M, and interest expense of $90M. Its effective tax rate is 25%.
Route one, from EBIT:
- NOPAT. $1,200M × (1 − 0.25) = $900M.
- Add back D&A. 900 + 260 = $1,160M.
- Subtract capital expenditure. 1,160 − 380 = $780M.
- Subtract the working capital build. 780 − 60 = $720M of FCFF.
Route two, from the cash flow statement. First reconstruct what the statement would show. Net income is (EBIT − interest) × (1 − t) = ($1,200M − $90M) × 0.75 = $832.5M. Cash flow from operations is net income plus D&A less the working capital build: 832.5 + 260 − 60 = $1,032.5M.
- Start at CFO. $1,032.5M.
- Add back after-tax interest. $90M × 0.75 = $67.5M, giving $1,100M.
- Subtract capital expenditure. 1,100 − 380 = $720M of FCFF.
The routes agree, as they must. Now read the supporting figures. Gross reinvestment is 380 + 60 = $440M. Net reinvestment is 380 − 260 + 60 = $180M, and the identity holds: $900M − $180M = $720M. The reinvestment rate is 180 ÷ 900 = 20%, so the company keeps four-fifths of its after-tax operating profit as distributable cash. The FCFF margin is 720 ÷ 6,000 = 12%.
How to read the result
Judge the level against reinvestment, not in isolation. A negative FCFF at a company building capacity means something entirely different from a negative FCFF at a mature company whose working capital is deteriorating. Look at the reinvestment rate: if net reinvestment is 20% of NOPAT, the business is generating cash and growing modestly; if it is 90%, almost everything earned is going back into the ground and the valuation depends on that spending earning a decent return.
Tie the reinvestment rate to growth. The link is direct: expected growth in operating income equals the reinvestment rate times the return on invested capital. A firm reinvesting 20% of NOPAT at a 15% return on capital supports 3% growth. If your DCF forecast assumes 8% growth from a 20% reinvestment rate, it is implicitly assuming a 40% return on capital, and that assumption should be stated rather than smuggled in.
Use the margin for comparison, carefully. FCFF margin is comparable across companies in a way that the absolute figure is not, but it moves with the investment cycle. A single year in which capital expenditure spiked can halve it without telling you anything about the business. Average across three to five years, or normalise capital expenditure to its ratio against depreciation over the cycle.
Watch for a persistent gap between NOPAT and FCFF. When a company reports healthy operating profit year after year while free cash flow lags, the cash is going somewhere: into receivables that are not collecting, into inventory that is not selling, or into capital spending that is not producing revenue. That gap is one of the most reliable early signals in financial statement analysis.
Once you have a stable FCFF, project it forward and discount it in the enterprise DCF calculator, and use the final forecast year in the terminal value calculator.
How each line item is treated on each route
| Line item | EBIT route | CFO route |
|---|---|---|
| EBIT | Starting point | Used only for NOPAT |
| Tax on EBIT | Subtract EBIT × t | Already included (cash taxes paid) |
| Interest expense | Excluded by construction | Add back interest × (1 − t) |
| Depreciation & amortisation | Add back in full | Already included |
| Other non-cash charges | Add back in full | Already included |
| Increase in net working capital | Subtract | Already included |
| Capital expenditure | Subtract | Subtract |
| Acquisitions of businesses | Subtract if treated as reinvestment | Subtract if treated as reinvestment |
| Net borrowing and repayments | Excluded | Excluded |
| Dividends and buybacks | Excluded | Excluded |
Financing flows never appear in FCFF on either route: they are how the cash is distributed, not how it is generated. Whether to treat acquisitions as reinvestment is a judgement — include them if growth in the forecast depends on continuing to buy businesses.
Errors that corrupt an FCFF figure
- Taxing pre-tax income instead of EBIT. Using net income's tax charge leaves the interest tax shield inside the cash flow, and the WACC then counts it a second time.
- Adding interest back gross. On the CFO route the add-back is interest times one minus the tax rate. Adding the gross figure overstates FCFF by the tax shield.
- Including cash or short-term debt in working capital. Net working capital for this purpose is non-cash current assets less non-debt current liabilities. Leave both cash and any borrowings out.
- Netting capital expenditure against asset disposals without thinking. Proceeds from selling a plant are not an offset to the cost of building one unless disposals are a recurring part of the business model.
- Using a single year's working capital swing in a forecast. Working capital movements are volatile and often reverse. Forecast the change as a percentage of the change in revenue instead.
- Forgetting operating lease treatment. Under IFRS 16 and ASC 842 most leases now sit on the balance sheet, which raises both EBIT and depreciation and shifts payments out of operating cash flow. Comparisons with pre-adoption years need care.
- Treating share-based compensation as a genuine cash saving. Adding it back is correct in the mechanics, but it dilutes shareholders, so the share count in your valuation must grow to match.
FCFF versus the “free cash flow” on your data terminal
Most screeners define free cash flow as cash flow from operations minus capital expenditure. That figure is levered: interest has already been paid out of CFO, so it belongs to shareholders, not to the whole firm. Discounting it at the WACC produces an enterprise value that is too high, and the error grows with leverage. To convert, add interest expense times one minus the tax rate. On the worked example above, the screener figure would be 1,032.5 − 380 = $652.5M, against a true FCFF of $720M — a gap of $67.5M, exactly the after-tax interest.
Where FCFF fits, and when to use something else
FCFF is the currency of enterprise valuation. Forecast it for each year of an explicit horizon, discount at the WACC, add a terminal value, and you have an enterprise value; subtract net debt and you have equity. Every input to that chain traces back to the cash flow figure this calculator produces, which is why an error here propagates through the entire model.
Free cash flow to equity is the alternative when the capital structure is the point rather than a distraction. FCFE deducts after-tax interest and adds net borrowing, leaving what is actually available to shareholders; it is discounted at the cost of equity. Use it for financial institutions, where debt is raw material, and for highly levered situations where the debt schedule drives the equity story. Where a company distributes most of what it earns, the dividend discount model reaches a similar answer with fewer moving parts.
Two further measures are worth distinguishing. EBITDA is sometimes used as a cash flow proxy; it is not one, because it ignores tax, capital expenditure and working capital — the three things that consume most of a company's cash. Owner earnings, the concept popularised in Berkshire Hathaway's shareholder letters, is close to FCFF but replaces reported capital expenditure with the maintenance capital expenditure required to hold the competitive position, on the reasoning that growth spending is discretionary. It is a useful lens and an unavoidably subjective one, since companies do not disclose the split.
Key terms
- NOPAT
- Net operating profit after tax: EBIT times one minus the tax rate. The profit the business would report if it carried no debt.
- Net working capital
- Non-cash current assets less non-debt current liabilities — chiefly receivables plus inventory less payables and accruals. Cash and short-term borrowings are excluded.
- Reinvestment rate
- Net reinvestment divided by NOPAT. Multiplied by the return on invested capital it gives the sustainable growth rate of operating income.
- Unlevered
- Calculated as though the company had no debt, so the figure reflects operating performance independently of financing.
- Maintenance capital expenditure
- The portion of capital spending needed to sustain current operations, as opposed to expanding them. Rarely disclosed, often approximated by depreciation.