Guides
Free Cash Flow: Formula, Types, and How to Calculate It
Free cash flow (FCF) is the cash a business has left after paying its operating costs and funding the capital spending needed to keep running. The core formula is operating cash flow minus capital expenditures. FCF is the cash a company can actually use to pay down debt, pay dividends, buy back stock, or reinvest, which is why analysts often treat it as a cleaner signal than net income.
Net income runs through non-cash items like depreciation and accrual timing. FCF strips most of that out and shows what hit the bank account after mandatory reinvestment. Two companies can report the same profit and produce very different free cash flow, and the FCF number usually tells you more about which one can survive a downturn.
What is free cash flow?
Free cash flow is the cash generated from operations after subtracting the capital expenditures required to maintain and grow the asset base. It measures discretionary cash, the money left over once the business has paid its bills and reinvested in property, plant, and equipment. Positive FCF funds debt repayment, distributions, and acquisitions without new financing.
The number sits below net income in economic meaning but is harder to manipulate. Accrual accounting can inflate reported earnings through revenue timing or capitalized costs, while FCF ties back to the cash flow statement and actual investing outflows. That is why lenders, private equity buyers, and dividend investors anchor on it.
FCF is not a line on the income statement or a required GAAP figure. You build it yourself from the cash flow statement and, in some methods, the income statement and balance sheet. Because it is a non-GAAP metric, definitions vary slightly between analysts, so always confirm which build a source used.
The free cash flow formula
The most common free cash flow formula is cash flow from operations minus capital expenditures. Both inputs come straight from the statement of cash flows: operating cash flow (CFO) from the top section, and CapEx from the investing section, usually labeled “purchases of property, plant, and equipment.”
Free Cash Flow = Cash Flow From Operations − Capital Expenditures
CFO already reflects net income adjusted for non-cash charges (depreciation, amortization, stock compensation) and changes in working capital (receivables, inventory, payables). Subtracting CapEx removes the cash spent on long-lived assets. What remains is the cash the business did not need to keep operating.
This simple version is technically FCF to the firm’s operations before financing choices, and many analysts use it as a quick proxy. When precision matters, split FCF into its two formal types below, because the treatment of debt changes the answer.
FCFF vs FCFE: the two types of free cash flow
The two formal types are free cash flow to the firm (FCFF) and free cash flow to equity (FCFE). FCFF is the cash available to all capital providers, both debt and equity, before financing effects. FCFE is the cash available to equity holders only, after interest and net debt changes. The gap between them is the treatment of debt.
FCFF is often called unlevered free cash flow because it ignores the capital structure. FCFE is called levered free cash flow because it reflects interest and borrowing. In a discounted cash flow valuation, FCFF pairs with the weighted average cost of capital (WACC) to produce enterprise value, while FCFE pairs with the cost of equity to produce equity value. Matching the cash flow to the right discount rate matters.
| Feature | FCFF (unlevered) | FCFE (levered) |
|---|---|---|
| Cash available to | All capital providers (debt + equity) | Equity holders only |
| Interest expense | Excluded (added back, after tax) | Included |
| Net borrowing | Excluded | Included (added) |
| Discount rate in DCF | WACC | Cost of equity |
| Produces | Enterprise value | Equity value |
| Also called | Unlevered FCF | Levered FCF |
To move between them: FCFE = FCFF − Interest × (1 − Tax Rate) + Net Borrowing. In many cases FCFF is the starting point for a firm-level valuation, while FCFE speaks directly to what shareholders can receive.
How to calculate FCF from cash flow from operations
The CFO build-up is the fastest reliable method because CFO already bundles the non-cash and working capital adjustments. Start with cash flow from operations from the statement of cash flows, then subtract capital expenditures. For FCFE, also add net borrowing (new debt raised minus debt repaid).
The steps for FCFF and FCFE from CFO:
- Take cash flow from operations (CFO) from the top of the cash flow statement.
- Subtract capital expenditures (CapEx) from the investing section. This gives a simple FCF.
- For FCFF, add back interest expense net of tax: Interest × (1 − Tax Rate), because interest was already deducted inside CFO but belongs to debt holders.
- For FCFE, instead add net borrowing: new debt issued minus debt repaid.
The formulas:
FCFF = CFO + Interest × (1 − Tax Rate) − CapEx
FCFE = CFO − CapEx + Net Borrowing
Interest sits inside net income and therefore inside CFO under U.S. GAAP, so the FCFF add-back corrects for that. If you skip it, you understate the cash truly available to the whole firm.
How to calculate FCF from EBITDA
The EBITDA build-up starts higher on the income statement and is common in valuation and M&A models. EBITDA (earnings before interest, taxes, depreciation, and amortization) is a pre-tax, pre-financing profit figure. To reach FCFF, apply taxes correctly, add back the tax shield from D&A, then subtract the change in working capital and CapEx.
The formula:
FCFF = EBITDA × (1 − Tax Rate) + (D&A × Tax Rate) − Change in Working Capital − CapEx
The common trap: do not multiply EBITDA directly by the tax rate. Depreciation, amortization, and interest are tax-deductible, so real taxes are computed on pre-tax income (EBITDA − D&A − interest), not on EBITDA. The formula above handles this by taxing EBITDA and then adding back D&A × Tax Rate, which restores the depreciation tax shield. For a cleaner build, some analysts prefer to compute taxes off EBIT.
EBITDA itself is not free cash flow. It ignores CapEx and working capital, the two items that often consume the most cash. A company can show strong EBITDA and negative FCF if it is capital-intensive or tying up cash in inventory and receivables. See our guide to EBITDA adjustments for how these figures get normalized.
Worked example: FCF calculated two ways
The table below runs one company through both build-ups. Assume EBITDA of $100 million, D&A of $15 million, interest expense of $5 million, an effective tax rate of 25%, a $10 million increase in working capital (a cash use), and CapEx of $20 million.
| Line item | CFO build-up | EBITDA build-up |
|---|---|---|
| EBITDA | $100.0M | |
| Less: D&A | ($15.0M) | |
| Less: interest | ($5.0M) | |
| Pre-tax income (EBIT − interest) | $80.0M | |
| Less: taxes at 25% | ($20.0M) | |
| Net income | $60.0M | $60.0M |
| Add back: D&A (non-cash) | $15.0M | $15.0M |
| Less: change in working capital | ($10.0M) | ($10.0M) |
| Cash flow from operations (CFO) | $65.0M | |
| Less: CapEx | ($20.0M) | ($20.0M) |
| Simple FCF / FCFF | $45.0M | $45.0M |
Both paths land at $45 million because they describe the same cash reality from different starting points. The CFO route trusts the reported operating cash flow; the EBITDA route rebuilds it line by line, which is useful when you are projecting future years and do not have a CFO figure yet.
To get FCFE from this $45 million, add net borrowing and subtract the after-tax adjustment already embedded. If the company raised $8 million of net new debt, FCFE would be roughly FCF plus net borrowing, adjusted for how interest was treated, illustrating why equity holders can see a different figure than the firm as a whole.
How to interpret free cash flow
Read FCF against revenue and against the company’s own history, not in isolation. FCF margin (free cash flow divided by revenue) is the standard yardstick. Many mature businesses target a 10% to 15% FCF margin; a reading below 5% can be a warning sign unless the company is deliberately investing for growth. Context and industry drive the benchmark.
Industry matters a lot. Software firms often run FCF margins of 20% to 30% because they spend little on physical assets, while capital-intensive manufacturers may sit at 5% to 10% and still be healthy. Comparing a chip maker to a software vendor on raw FCF margin misleads.
Negative FCF is not automatically bad. A high-growth company may spend heavily on CapEx and working capital, running negative FCF on purpose while it scales. The question is whether that spending earns a return and whether financing is available to bridge the gap. Persistent negative FCF at a mature company, by contrast, signals trouble. Pair FCF analysis with working capital trends and the income statement to see what is driving the number.
Frequently asked questions
What is the simplest free cash flow formula?
The simplest formula is Free Cash Flow = Cash Flow From Operations − Capital Expenditures. Both figures come from the statement of cash flows: operating cash flow from the top section and CapEx from the investing section. This quick version works for most screening purposes, though analysts split FCF into FCFF and FCFE when they need to account for debt and interest precisely.
What is the difference between FCFF and FCFE?
FCFF (free cash flow to the firm) is the cash available to all capital providers, both debt and equity, and is calculated before the effect of interest and borrowing. FCFE (free cash flow to equity) is the cash left for shareholders only, after interest expense and net debt changes. FCFF is called unlevered and FCFE levered. FCFF = FCFE + Interest × (1 − Tax Rate) − Net Borrowing.
Is EBITDA the same as free cash flow?
No. EBITDA excludes taxes, capital expenditures, and changes in working capital, which are real cash outflows for most businesses. A capital-intensive company can post strong EBITDA and still generate negative free cash flow. EBITDA can serve as a rough starting point, but reaching FCF requires subtracting taxes, CapEx, and working capital changes, and adjusting for the depreciation tax shield.
Why not just multiply EBITDA by the tax rate?
Because depreciation, amortization, and interest are tax-deductible, so actual taxes are computed on pre-tax income (EBITDA minus D&A minus interest), not on EBITDA itself. Multiplying EBITDA by the tax rate overstates the tax bill and understates cash. The correct EBITDA build-up taxes EBITDA and then adds back D&A times the tax rate to restore the depreciation tax shield.
What is a good free cash flow margin?
A common target for mature companies is a free cash flow margin of 10% to 15% or higher, with readings under 5% often treated as a caution flag. Benchmarks vary widely by industry: software firms may run 20% to 30%, while manufacturers may sit at 5% to 10% and remain healthy. Judge FCF margin against industry peers and the company’s own trend.
Can free cash flow be negative?
Yes, and it is not always a problem. High-growth companies often report negative FCF while investing heavily in capital expenditures and working capital to expand. The key questions are whether that spending generates an adequate return and whether the company can fund the shortfall. Sustained negative FCF at a mature business, however, usually signals underlying weakness.
Reviewed by The Ledgerism Editorial Team. Last reviewed: July 2026.