Free cash flow model formula explained for beginners

Free cash flow (FCF) is the cash a business generates after paying for capital expenditures. The basic free cash flow model formula is: FCF = Operating Cash Flow minus Capital Expenditures. For valuation work, two variants matter: Unlevered Free Cash Flow (FCFF), which strips out the effects of debt, and Levered Free Cash Flow (FCFE), which reflects what equity holders actually receive. This guide walks through every line item you need to find on a real statement and explains when to use each variant. The first three steps below cover the basic calculation; the valuation variants follow separately.

What is the free cash flow model formula?#

Free cash flow is the cash left over after a business has paid for the investments needed to maintain or grow its asset base. It is not a line item you will find printed on a financial statement. You calculate it yourself from two figures: operating cash flow and capital expenditure.

The basic formula is:

FCF = Operating Cash Flow − Capital Expenditures

Operating cash flow is the cash generated by the core business, after adjusting for working capital movements but before financing and investing activities. Capital expenditure (CapEx) is the cash spent on physical assets: machinery, equipment, property, and similar items.

The reason FCF matters is that accounting profit is built on estimates. Depreciation schedules, accruals, and revenue recognition policies all involve judgement calls. Cash does not. Profit is an opinion. Cash is a fact.

According to Intrinsiqq's 2026 data, 57.8% of U.S. companies outside banking and insurance produced positive free cash flow, based on a sample of 3,411 companies. That means more than four in ten did not. A 2025 study from the Warsaw School of Economics found that nearly one-quarter of listed companies analysed reported negative free cash flow for at least three consecutive years.

Those figures matter because they show FCF is not guaranteed, even for companies that report profit. A business can grow its revenue, post a positive net income, and still see its bank account shrink if it is investing heavily in assets or carrying high working capital. The Cash flow statement on bluprnts breaks down exactly where that money goes, which is the right place to start before you build any model.

Free cash flow formulas come in several forms. The basic version suits financial health checks. The valuation variants, FCFF and FCFE, suit investor analysis. The sections below cover all three.

Is free cash flow the same as profit?#

Free cash flow is not the same as profit. The difference is not a technicality. It is the reason profitable companies run out of money.

Net profit is calculated on an accruals basis. It records revenue when it is earned and expenses when they are incurred, regardless of when cash actually moves. A company that invoices a large sum in December but collects nothing until February records that revenue in December. Its profit looks healthy. Its bank account does not reflect it yet.

Free cash flow only counts cash that has actually arrived or left. It also deducts capital expenditure, which net profit does not. A company that buys equipment records only the annual depreciation charge against profit. Free cash flow takes the full purchase price as a hit in the year the cash goes out.

EBITDA is a closer cousin to cash flow than net profit is, but it still excludes working capital movements and capital expenditure. A company with strong EBITDA can still have negative FCF if it is expanding its asset base quickly or if customers are slow to pay.

How to calculate free cash flow step by step#

There are two methods here, and it helps to keep them separate. Steps 1 to 3 give you basic FCF directly from a cash flow statement: this is the beginner starting point. Steps 4 and 5 give you Unlevered Free Cash Flow (FCFF) from the income statement, which is the version used in valuation models. Use the first method for a quick financial health check. Use the second when you are building a DCF or preparing investor materials.

1. Identify the net cash provided by operating activities on the cash flow statement. This is a single subtotal, usually labelled "Net cash from operating activities" or "Cash generated from operations." It already accounts for working capital movements and non-cash adjustments. You do not need to rebuild it from scratch.
2. Locate capital expenditures in the investing activities section. The line is usually labelled "Purchase of property, plant and equipment" or "Acquisition of fixed assets." It will appear as a negative number, representing cash paid out.
3. Subtract the capital expenditure figure from operating cash flow. The result is your basic FCF. If operating cash flow is £200k and CapEx is £50k, your FCF is £150k. That figure tells you how much cash the business generated that was free to deploy.You can cross-check your work using the Free cash flow and runway tools on bluprnts, which apply the same calculation to your modelled figures automatically.
4. For a valuation-ready model, start with EBIT (earnings before interest and tax) from the income statement. Apply a hypothetical tax rate as if the company carried no debt. The result is NOPAT: net operating profit after tax. This step removes the tax benefit of interest payments so the figure reflects the business independently of how it is financed.
5. Add back non-cash charges such as depreciation and amortisation. Then subtract any increase in net working capital and subtract capital expenditure. The result is Unlevered Free Cash Flow.

A worked example illustrates why the numbers can diverge sharply from profit. An illustration from OpenExamPrep (2025) shows that an EBIT of 6,800, after taxes of 1,360, a depreciation and amortisation add-back of 400, a net working capital increase of 14,000, and capital expenditure of 40,400, produces a UFCF of −48,560. The business is profitable at the EBIT level, but heavy investment in working capital and fixed assets consumes far more cash than operations generate. That is the gap the formula makes visible.

FCFF vs FCFE: which free cash flow formula should you use?#

FCFF and FCFE are two variants of the same underlying idea, but they answer different questions. FCFF (Free Cash Flow to the Firm) shows the cash available to all capital providers: equity holders and debt holders together. FCFE (Free Cash Flow to Equity) shows only what remains for equity holders after debt obligations are met.

The formulas follow from that distinction. FCFF starts with NOPAT (from Step 4 above), adds back non-cash charges, and subtracts net working capital investment and capital expenditure. It does not deduct interest or debt repayments, because it is measuring the business before financing costs. FCFE starts from the same point but then subtracts net borrowing repayments and adds any new debt raised, leaving only the cash that equity holders can claim.

When should you use each? Use FCFF when you are valuing the whole business, for example in a discounted cash flow (DCF) model where you want to compare companies regardless of how they are financed. A highly leveraged company and a debt-free company with identical operations will produce the same FCFF. That makes comparisons cleaner. Use FCFE when you are valuing equity directly, or when you want to assess what a shareholder actually receives.

According to the CFA Institute, analysts who use discounted free cash flow models employ FCFF versions roughly twice as often as FCFE models. The practical reason is that FCFF is less sensitive to changes in capital structure. If a company refinances its debt, FCFF stays stable while FCFE shifts. For early-stage businesses where the debt picture is still evolving, that stability matters.

FCFF and FCFE are not interchangeable. Using FCFE when a lender or investor expects FCFF will produce a lower figure and may understate the business's value. Before you build a model, decide which question you are answering: the value of the whole firm, or the value of the equity stake.

Maintenance vs growth capex: why it changes your free cash flow ratio#

Not all capital expenditure is the same, and treating it as a single line distorts your FCF figure. Maintenance capex is spending required to keep existing assets operational: replacing worn equipment, repairing infrastructure, renewing software licences. Growth capex is spending that expands the business: a new production line, a second office, a server farm to support new customers. The distinction matters because only maintenance capex is truly unavoidable.

A business with high operating cash flow and heavy total capex may show a modest FCF figure. But if most of that capex is growth investment the company chose to make, the underlying maintenance spend is far lower. Strip out the growth portion and the business generates substantially more cash before discretionary investment. That is a very different picture.

The free cash flow ratio formalises this check. It is calculated as FCF divided by operating cash flow, expressed as a percentage. A ratio close to 100% means almost all operating cash converts to free cash: low capex intensity, strong conversion. A ratio close to zero, or negative, means the business is consuming most of what it earns to sustain or expand its asset base.

For founders, the honest version of this calculation requires splitting the capex line in your own records. Maintenance capex. Growth capex. Keep them separate from the start. If you cannot separate them after the fact, you cannot tell whether a declining FCF ratio reflects a deliberate growth investment or a deteriorating asset base that demands constant repair. Those two situations call for very different responses.

What is a 13 week cash flow model and when do you need one?#

A 13 week cash flow model is a short-term operational forecast that maps every cash receipt and payment across a 13-week (roughly three-month) horizon, week by week. It is not a valuation tool. Its purpose is survival: knowing whether you will have enough cash in the bank to meet payroll, rent, and supplier payments in the near term.

The FCF model formula you have worked through above is built for analysis and valuation. It works on monthly or annual figures and answers the question: how much cash does this business generate? The 13 week model answers a different question: will we run out of cash before the end of next month?

Founders typically need a 13 week model in three situations. When they are in a tight position and need to manage cash day by day. When a lender or investor asks for a short-term cash forecast as part of due diligence. When the business needs to manage cash week by week rather than month by month. When the business is going through a restructuring or a period of rapid change where annual forecasts are too coarse to be useful.

The closing balance each week becomes the opening balance of the next. If any week goes negative, you have a problem to solve before it arrives. The 13-Week Cash Flow Template: Free Download and Guide on bluprnts walks through the layout and key line items, and the 13-Week Cash Flow Forecast: A Step-by-Step Guide covers the build from scratch.

How bluprnts automates your cash flow model#

When a model lives in a disconnected spreadsheet, updating it means re-entering figures by hand, and the cash flow calculation drifts out of date within weeks.

bluprnts is a financial modelling tool that builds the cash flow picture automatically from the inputs you enter: products and pricing, headcount, sales, costs, and financing lines. You do not need accounting software or a ledger to get started. The platform derives the P&L, balance sheet, cash flow statement, and runway from the same underlying model, so every figure stays consistent.

For founders who have just worked through the FCF formula, that means the operating cash flow and CapEx figures you need for the calculation are already present in the model. You are not hunting through separate spreadsheets or reconciling two different data sources. The Free cash flow and runway tools apply the calculation directly to your modelled figures.

bluprnts is free to start, and subscriptions are priced by last year's revenue, from £49 a month. If you want to see how the cash flow model fits into a broader financial modelling process, the startup financial modelling resources on bluprnts cover the full picture from inputs to investor-ready outputs.

FAQs#

How do you calculate a DCF valuation using free cash flow?#

A DCF (discounted cash flow) valuation takes your projected FCFF or FCFE figures for each future period and discounts them back to today's value using a rate that reflects the risk of the business. FCFF is the more common starting point because it values the whole firm before financing costs. The mechanics of choosing a discount rate and terminal value go beyond the scope of this guide, but the FCF calculation covered above is the essential input.

What is a good free cash flow ratio for a startup?#

There is no single benchmark. Early-stage startups often have negative or near-zero FCF ratios because they are investing heavily in growth capex and working capital. A ratio improving over successive periods is a better signal than any absolute figure. What matters is whether you can explain the gap between operating cash flow and FCF: is it deliberate growth investment, or unavoidable maintenance spend? That distinction tells you more than the ratio alone.

Can a company have positive profit but negative free cash flow?#

Yes, and it is common. A company invoices customers in one period but collects cash later, records only annual depreciation rather than the full CapEx outflow, and may be growing its stock or debtors balance. All of these reduce cash without reducing reported profit. A business expanding quickly into new markets can post strong net income while burning cash on assets and working capital simultaneously.

Where do I find capital expenditure on a financial statement?#

Capital expenditure appears in the investing activities section of the cash flow statement, not the income statement. Look for a line labelled "Purchase of property, plant and equipment", "Acquisition of fixed assets", or similar. It will be a negative number, representing cash paid out. Some companies break it into several lines (land, buildings, equipment separately). Add those lines together to get total CapEx for the period.

How often should a startup update its free cash flow model?#

Monthly is the minimum for most startups. If you are in a tight cash position or approaching a fundraise, update it weekly. The model loses its value if it is more than a few weeks behind actual receipts and payments. The 13 week cash flow model is a useful companion for the short-term view: it forces a weekly discipline that the longer-range FCF model does not.

Conclusion#

Free cash flow is the cash a business generates after funding its capital expenditure. The basic formula, operating cash flow minus CapEx, gives you a financial health check you can run from any cash flow statement. For valuation work, FCFF strips out debt effects and suits whole-firm analysis; FCFE reflects what equity holders receive and suits direct equity valuation.

Pull your most recent cash flow statement, find the operating cash flow subtotal and the CapEx line in investing activities, and subtract one from the other. If the result surprises you, trace it back to the capex split: how much was maintenance, and how much was a deliberate growth decision? That single question usually explains most of what you find.