Free Cash Flow
Free cash flow (FCF) is the cash a company generates after paying for operating expenses and capital expenditures, representing the true cash available to return to shareholders, pay down debt, or fund acquisitions.
Free cash flow is often described as a company's 'real' earnings because it cannot be manipulated by accounting choices the way net income can. Revenue recognition timing, depreciation schedules, and non-cash charges all affect reported earnings, but cash is cash. When Alphabet reports $70 billion of free cash flow in a year, it means that much actual money flowed into the company's coffers after all bills and investments were paid.
The standard FCF formula subtracts capital expenditures (capex) from operating cash flow. Capex includes spending on property, equipment, technology infrastructure, and other long-lived assets that are required to maintain or grow the business. A company that generates $15 billion in operating cash flow but must spend $10 billion on capex just to stay competitive — as many telecom companies do — has far less free cash flow than its income statement suggests.
Free cash flow yield — FCF divided by market cap — is a useful valuation metric. An FCF yield of 5% means a stock is effectively 'earning' 5 cents of real cash per dollar invested, analogous to a bond's yield. Apple, with its enormous buyback program funded by FCF, has rewarded shareholders not through dividends alone but through the compounding effect of share count reduction. Between 2013 and 2024 Apple returned well over $700 billion to shareholders primarily through buybacks funded by free cash flow.
Growth companies often have negative or minimal free cash flow in their early years because they are investing heavily in future capacity. Amazon famously plowed all its cash generation back into logistics, AWS infrastructure, and new business lines for years, making it look unprofitable even as the underlying economics improved dramatically. FCF-focused investors who understood this were rewarded as the investments paid off and FCF eventually surged.
Levered vs. unlevered free cash flow is an important distinction in M&A and valuation. Unlevered FCF (also called free cash flow to the firm, or FCFF) is calculated before interest payments and captures the cash generated by the business regardless of its capital structure. Levered FCF (FCFE) subtracts net interest payments and reflects what is available to equity holders only. DCF models typically discount unlevered FCF at the WACC to arrive at enterprise value.