Buffett defined owner earnings in his 1986 letter as follows: “(a) reported earnings plus (b) depreciation, depletion, amortization, and certain other non-cash charges … less (c) the average annual amount of capitalized expenditures for plant and equipment, etc. that the business requires to fully maintain its long-term competitive position and its unit volume. (If the business requires additional working capital to maintain its competitive position and unit volume, the increment also should be included in (c).)”1
