Free cash flow: how to calculate and interpret it
Free cash flow is the cash a company keeps after operations and necessary investment. A step-by-step calculation and the common mistakes in interpreting it.
Free cash flow is the cash a company has left after deducting, from the cash its operations generate, the investment needed to sustain and grow those operations. That cash can be used to repay debt, pay dividends, fund new investment or simply be held. Profit is an accounting measure; free cash flow shows how much cash the company actually produces. That is why lenders, investors and valuers look at free cash flow more than at profit. In this article I cover the different definitions of free cash flow, a step-by-step calculation, the effect of leases and new reporting standards, and the most common mistakes in interpreting it.
The short answer
In its simplest form:
Free cash flow = Cash from operating activities − Capital expenditure
This definition is practical because it can be taken straight from the cash flow statement. But different definitions are used for different purposes, and mixing them up leads to serious errors, particularly in valuation and credit analysis.
Types of free cash flow
| Definition | Whose cash? | Used for |
|---|---|---|
| Free cash flow to the firm (FCFF) | All providers of capital (lenders and shareholders) | Company valuation (discounted at WACC), debt capacity analysis |
| Free cash flow to equity (FCFE) | Shareholders only, after debt service | Equity valuation, dividend capacity |
| Simple free cash flow | Operating cash flow − capex | Management reporting, trend tracking |
Whichever definition is used, it should be stated clearly in the report and applied consistently across periods.
Step-by-step calculation
For management, the clearest route is to start from EBITDA and work towards cash:
- EBITDA: operating profit plus depreciation and amortisation.
- Tax paid: the tax actually paid in the period, not the tax charge.
- Change in working capital: increases in receivables and inventory reduce cash; increases in trade payables add to it.
- Cash from operations (before interest): 1 − 2 ± 3.
- Capital expenditure: maintenance and growth capex shown separately.
- Free cash flow to the firm (FCFF): 4 − 5.
- Debt service: interest paid and net debt repayment (or new borrowing).
- Free cash flow to equity (FCFE): 6 − 7.
A hypothetical example
The company and figures below are hypothetical (TRY million):
| Item | Amount |
|---|---|
| EBITDA | 60.0 |
| Tax paid | −8.0 |
| Increase in working capital (receivables and inventory up, net of payables) | −12.0 |
| Cash from operations (before interest) | 40.0 |
| Maintenance capex | −10.0 |
| Growth capex | −15.0 |
| Free cash flow to the firm (FCFF) | 15.0 |
| Interest paid | −6.0 |
| Net debt repayment | −4.0 |
| Free cash flow to equity (FCFE) | 5.0 |
Some conclusions from the table:
- Although the company generates TRY 60 million of EBITDA, only TRY 5 million is left for shareholders after investment and debt service. A dividend of, say, TRY 15 million would have to be funded with debt.
- Without growth capex, FCFF would be TRY 25 million. The distinction matters: low free cash flow may reflect a deliberate growth investment rather than weak operations.
- The increase in working capital absorbs a fifth of EBITDA. Is that consistent with the pace of growth, or does it point to a collection problem? That question deserves separate investigation.
Cash conversion ratios
A practical way to compare free cash flow across companies and periods is to look at ratios showing how much profit turns into cash:
- Operating cash flow / EBITDA: 40 / 60 = about 67% in the example. It shows how much EBITDA becomes cash after tax and working capital needs.
- Free cash flow / EBITDA: 15 / 60 = 25% in the example. It also reflects investment intensity.
- Free cash flow / net profit: used particularly when assessing earnings quality.
These ratios should be tracked as a multi-year trend, not for a single year. I discuss how to assess earnings quality in quality of earnings.
Separating maintenance from growth capex
Capital expenditure is the most debated component of free cash flow. Separating the maintenance capex needed to preserve existing capacity from growth capex that adds capacity gives a clearer view of the company’s “sustainable” cash generation. Accounting records usually do not make this split; management has to define it. Practical approaches:
- Classify investment requests at approval as maintenance, efficiency, capacity expansion or new business
- Compare long-run average maintenance capex with depreciation (in high inflation, depreciation based on historical cost can understate the true replacement need)
I describe how to classify investment requests in building a capex approval process.
The effect of leases
Under IFRS 16, a lessee recognises a right-of-use asset and a lease liability for leases longer than 12 months that are not of low value. This directly affects free cash flow: lease expense no longer sits within operating expenses; depreciation and interest appear instead. The principal portion of lease payments is presented within financing activities in the cash flow statement.
As a result, in a lease-heavy company EBITDA and operating cash flow look higher by roughly the amount of the lease payments. If the example company’s annual lease payments are TRY 5 million, comparable free cash flow after the lease effect is TRY 10 million rather than 15. This adjustment is needed when comparing companies with different lease intensity, or comparing with periods before the standard applied.
Reporting changes
IAS 7, which governs the cash flow statement, allows operating cash flows to be reported using either the direct or the indirect method, and splits cash flows into operating, investing and financing activities. IFRS 18, issued in 2024 and effective for annual periods beginning in 2027 or later, introduces defined subtotals such as operating profit in the income statement, makes operating profit the starting point for the indirect method, and sets new rules for classifying interest and dividend cash flows. How and when national frameworks adopt these changes should be monitored separately. The changes make it even more important to match free cash flow definitions carefully when comparing companies.
I cover how to read the cash flow statement in detail in how to read a cash flow statement.
Common interpretation mistakes
- Looking at a single year: working capital and capex fluctuate. One year of high free cash flow may come from unusually fast collection or deferred investment.
- Boosting free cash flow by cutting investment: deferring maintenance capex creates cash in the short term but comes back later as lost capacity and quality.
- Treating cash from stretched supplier terms as permanent: extending payables is a one-off effect. Cash created through supplier finance programmes also needs separate assessment; the disclosure requirements added to IAS 7 and IFRS 7 in 2023 aim to make such arrangements visible. I cover the topic in supplier finance and payment terms.
- Treating interest and tax inconsistently: interest is not deducted for FCFF but is for FCFE. Mixing the two produces wrong valuation and debt capacity results.
- Overlooking inflation: in high inflation nominal EBITDA rises fast, but so does the nominal value of working capital, which consumes cash. Free cash flow needs to be assessed in real terms.
Ways to improve free cash flow
| Lever | Example action | Nature of the effect |
|---|---|---|
| Operating profitability | Pricing, product mix, cost efficiency | Permanent |
| Collections | Invoicing speed, credit policy, collection follow-up | Permanent in level, one-off in flow |
| Inventory | Clearing slow-moving stock, ordering policy | Permanent in level, one-off in flow |
| Investment discipline | Weeding out low-return investments | Permanent |
| Tax planning | Correct use of incentives and exemptions (with specialist support) | Depends on the case |
“Permanent in level, one-off in flow” is an important distinction: cutting collection time by 10 days creates cash once, in that year; in later years free cash flow improves only to the extent that growth ties up less working capital. I describe practical measures on collections and inventory in how to reduce DSO and inventory turnover.
Frequently asked questions
Is negative free cash flow bad?
Not always. Temporarily negative free cash flow is normal in a company making growth investments. What matters is why it is negative and how it is funded. If free cash flow before growth capex is also negative, operations themselves are consuming cash, which is a more serious signal.
How large a gap between free cash flow and profit is normal?
It depends on the sector and the pace of growth; the gap is large in capital-intensive, fast-growing companies. What matters is that the reasons can be explained and that profit turns into cash over the long run.
How should a small company track free cash flow?
A simple bridge in the monthly management report showing EBITDA, the change in working capital and capex is enough. For weekly tracking a short-term cash forecast should be used; I described one in how to build a 13-week cash flow.
Conclusion
Free cash flow is the most direct measure of a company’s capacity to repay debt, pay dividends and fund growth. Choosing the right definition, separating maintenance from growth capex, and adjusting for leases and one-off working capital movements make it reliable enough to base decisions on. I covered the use of free cash flow in valuation in valuing a company with discounted cash flow. You can find my cash flow management work on the cash flow management page.