What Is Owner Earnings?
Owner earnings is a cash flow concept Warren Buffett laid out in his 1986 letter to Berkshire Hathaway shareholders. It measures the cash an owner could theoretically withdraw from a business each year without impairing its long-term earning power, which Buffett argued is the figure that actually matters for valuation rather than reported accounting profit.
The definition starts with reported earnings and adds back non-cash charges such as depreciation and amortization. From that subtotal, Buffett subtracts the average annual capital spending required to maintain the company's competitive position and unit volume, along with any additional working capital the business needs to keep operating at its current level.
How to Calculate It
A working formula is owner earnings = net income + depreciation and amortization + other non-cash charges − maintenance capital expenditures − incremental working capital needs. The hard part is estimating maintenance capex, since companies report total capex without separating the portion that merely sustains operations from the portion that funds growth. Analysts approximate it from management commentary and from historical relationships between depreciation and capital spending.
Consider a company with $100 million of net income, $40 million of depreciation and amortization, total capex of $50 million of which an estimated $30 million is maintenance, and stable working capital. Owner earnings equal $100M + $40M − $30M = $110 million, above reported net income because depreciation overstates the true annual cost of staying in business for this particular company.
Why It Matters
Owner earnings sharpens the distinction between accounting profit and economic reality. Businesses with heavy non-cash charges can be more valuable than their income statements suggest, while companies that must constantly reinvest just to stand still generate less for shareholders than reported earnings imply. Buffett argued that owner earnings, not the GAAP figure, is the relevant number for valuation purposes.
The concept is a direct ancestor of the free cash flow measures used across modern finance; the main difference is its focus on maintenance capex rather than total capex. For candidates interviewing at value-oriented funds, being able to walk from net income to owner earnings and to defend a maintenance capex estimate demonstrates the kind of business-quality thinking those firms prize.
