Free Cash Flow to the Firm: Formula, Example, and DCF Use

The free cash flow to the firm formula is: FCFF = EBIT × (1 − Tax Rate) + Depreciation and Amortization − Capital Expenditures − Change in Net Working Capital. The number it produces is the cash a business generates after operating costs, taxes, and reinvestment, but before any payments to lenders or shareholders. That makes it the cash available to every capital provider in the business, which is why it sits at the center of most valuation work.¹

What Each Piece of the Formula Does

EBIT is earnings before interest and taxes. Multiplying it by (1 − Tax Rate) produces net operating profit after taxes, often shortened to NOPAT. This is what the business earns from operations after taxes but before any interest payments. Starting here, rather than at net income, is deliberate: it keeps debt financing out of the result so the cash figure reflects what’s available to all capital providers equally.¹

Depreciation and amortization get added back because they reduced EBIT on the income statement without costing the company any actual cash. A factory that depreciates by $5 million on paper still has that $5 million in the bank.

Capital expenditures then come out because they represent real cash spent on new equipment, buildings, and other long-term assets. You can find CapEx in the investing activities section of the cash flow statement.²

The change in net working capital captures cash absorbed by day-to-day operations. Growing accounts receivable or inventory ties up cash even when the income statement looks fine. When calculating this change, exclude cash and cash equivalents from current assets and any interest-bearing debt from current liabilities. Cash is what you’re measuring, not an input, and short-term debt is a financing choice rather than an operating one.

A Numerical Example

Take a manufacturer with the following annual figures: EBIT of $20 million, depreciation and amortization of $5 million, capital expenditures of $5 million, and a $2 million increase in net working capital. The effective tax rate, combining federal and state obligations, is 25%.

NOPAT comes to $20 million × (1 − 0.25) = $15 million. Add back $5 million in depreciation to get $20 million. Subtract the $5 million in CapEx and the $2 million working capital increase. FCFF is $13 million. That’s the cash available to all capital providers, bondholders and stockholders alike, without eroding the company’s productive capacity.

Note what happened with depreciation. It got subtracted inside EBIT and then added right back. The net effect is just the tax savings from depreciation. In a steady-state business where CapEx roughly equals depreciation, the two offset. When CapEx consistently exceeds depreciation, the company is expanding its asset base, which eats into free cash flow.

Two Other Starting Points That Give the Same Answer

You don’t have to start from EBIT. If you’re working from net income, add back after-tax interest expense, because net income already deducted interest while FCFF is supposed to be capital-structure neutral:¹

FCFF = Net Income + Depreciation and Amortization + Interest × (1 − Tax Rate) − Capital Expenditures − Change in Net Working Capital

The interest add-back is multiplied by (1 − Tax Rate) because the company got a tax deduction on that interest. You’re adding back what actually left the company’s pocket. If a company paid $10 million in interest at a 25% effective tax rate, the real after-tax cost was $7.5 million, and $7.5 million is what you add back.

If you’re starting from cash flow from operations on the cash flow statement, CFO already accounts for depreciation and working capital changes, so the formula simplifies:

FCFF = CFO + Interest × (1 − Tax Rate) − Capital Expenditures

All three versions should produce the same number if the accounting is clean. The EBIT version is the most common in valuation models because the logic stays transparent. The CFO version is the fastest sanity check when you’re working from published financial statements.

Picking the Right Tax Rate

The federal corporate income tax rate is a flat 21%, a permanent change made by the Tax Cuts and Jobs Act of 2017.³ But that’s rarely the whole story. Most states impose their own corporate income tax on top, ranging roughly from 2% to 11.5% among the states that levy one.⁴ A few states use gross receipts taxes instead, and a few impose no corporate income tax at all.

For FCFF, use the company’s effective tax rate rather than the statutory 21%. The effective rate reflects the combined federal, state, and sometimes international burden the company actually pays. You can calculate it by dividing income tax expense by pre-tax income on the income statement, or many companies disclose it directly in their tax footnotes. Using the statutory federal rate alone will overstate FCFF because it understates the real tax bite.

Depreciation schedules shape the tax picture too. The IRS requires most tangible assets to be depreciated under the Modified Accelerated Cost Recovery System (MACRS), which front-loads deductions into the earlier years of an asset’s life.² Heavier depreciation early means larger tax shields and, temporarily, higher FCFF. When projecting forward, match your depreciation assumptions to the MACRS schedules the company actually uses rather than defaulting to straight-line.

FCFF vs. Free Cash Flow to Equity

Free cash flow to equity (FCFE) picks up where FCFF leaves off. It’s the cash left over after the company has paid its lenders, representing cash available to common shareholders only. The relationship is:¹

FCFE = FCFF − Interest × (1 − Tax Rate) + Net Borrowing

Net borrowing is the difference between new debt issued and debt repaid during the period. Borrow $10 million and repay $3 million, and net borrowing is $7 million.

Which one you want depends on what you’re valuing. FCFF gets discounted at the weighted average cost of capital (WACC), which blends the required returns of debt and equity holders. FCFE gets discounted at the cost of equity alone. Mixing them, like discounting FCFF at the cost of equity, produces a meaningfully wrong valuation.

FCFF is the safer default when a company’s capital structure is shifting. If a firm is paying down debt or loading up on leverage, FCFE swings year to year while FCFF stays relatively stable. For heavily indebted companies, FCFF cuts through the noise. FCFE is more useful when the capital structure is stable and you want the equity stake specifically.

Using FCFF in a Discounted Cash Flow Model

The main reason to calculate FCFF is to feed it into a discounted cash flow (DCF) model. A DCF projects FCFF over an explicit forecast period, typically five to ten years, and discounts each year’s cash flow back to today’s value at the WACC.

WACC blends the cost of equity, the after-tax cost of debt, and (if applicable) the cost of preferred stock, weighted by each one’s share of total market value:

WACC = (Weight of Equity × Cost of Equity) + (Weight of Debt × Cost of Debt × (1 − Tax Rate))

The cost of equity is usually estimated with the capital asset pricing model, which adds a risk premium to the risk-free rate based on the stock’s sensitivity to market movements. The cost of debt is the yield the company pays on its outstanding bonds, adjusted down for the tax deduction on interest.

Firm value equals the sum of each year’s projected FCFF divided by (1 + WACC) raised to that year’s position in the forecast, plus a terminal value that captures everything beyond the forecast horizon. The terminal value typically accounts for 60% to 80% of total firm value, which makes it the single most consequential number in the model and the one most worth scrutinizing.

Enterprise value from the DCF is the value of the operating business to all capital providers. To get to equity value, subtract the market value of debt (along with other non-equity claims such as preferred stock, minority interests, and pension obligations) and add back non-operating assets like excess cash. Dividing by shares outstanding gives an implied share price.¹

Reading the Result

Consistently positive FCFF signals a business that funds its own growth. The company can pay down debt, distribute dividends, or buy back shares without tapping outside capital. It reflects real cash generation rather than accounting profit, which can be dressed up with non-cash items.

Negative FCFF isn’t automatically a problem. Young companies and firms in heavy expansion routinely burn cash as they build infrastructure. The question is whether the capital expenditures causing the negative number will generate returns that justify the spending. A tech company spending $200 million on data centers that will produce $50 million per year in recurring revenue is a different story from a mature manufacturer whose existing plants cost more to maintain than they generate.

One useful diagnostic is the reinvestment rate: the share of NOPAT being plowed back into CapEx and working capital. Multiplying the reinvestment rate by the return on invested capital gives an estimate of the company’s fundamental growth rate in operating income. A company reinvesting 40% of NOPAT at a 15% return on capital is growing operating income by roughly 6% per year. When the return on capital drops below the cost of capital, reinvestment destroys value: the company would be better off distributing every dollar to its investors.

Where the Formula Falls Short

FCFF is only as good as its inputs, and a DCF built on it needs a lot of them: revenue growth, margins, tax rates, CapEx, working capital trends, a discount rate, and a terminal growth rate or exit multiple. Change the WACC by half a percentage point or the terminal growth rate by one point and the resulting valuation can move by 20% or more. Sensitivity tables that show the valuation across a range of assumptions help, but the vulnerability doesn’t go away.

FCFF also looks at the company in isolation. It doesn’t tell you how the stock is priced against competitors, whether the industry is growing or shrinking, or how market sentiment might affect trading multiples. A company can post strong FCFF and still be overpriced if the market has already baked those cash flows into the stock at a generous multiple. Pairing FCFF with relative metrics like price-to-earnings or enterprise value-to-EBITDA ratios gives a more complete picture than either method on its own.

1
CFA Institute. Free Cash Flow Valuation
2
Internal Revenue Service. Publication 946 – How To Depreciate Property
3
Legal Information Institute. Tax Cuts and Jobs Act of 2017 (TCJA)
4
PwC. United States – Corporate – Taxes on Corporate Income