What is Buffett's owner earnings formula and how does it differ from FCFE?

Q: What is Buffett's owner earnings formula and how does it differ from FCFE?

Owner earnings is Buffett's alternative cash profit measure: Reported Net Income + Non-cash charges (D&A) + Other non-cash items − Average annual maintenance capex (the portion needed to sustain competitive position and unit volume) − Working capital investment.\n\nThe crucial innovation is 'maintenance capex' rather than total capex. GAAP depreciation reflects historical costs; owner earnings uses the economic capex needed to preserve the business's earning power. If a business spends $200M on capex but only $120M is maintenance (the other $80M is growth), owner earnings subtract $120M, not $200M or the $95M of GAAP depreciation.\n\nFor Sunridge Consumer Products: Net income $340M, D&A $75M, total capex $180M (estimated maintenance $95M), working capital investment $25M. Owner earnings = 340 + 75 − 95 − 25 = $295M.\n\nDifferences from FCFE: FCFE subtracts total capex and adds net borrowing. Owner earnings subtracts only maintenance capex and ignores financing flows. Owner earnings isolates the sustainable cash flow available before deciding whether to reinvest for growth or return to shareholders. FCFE already reflects growth capex as a capital consumption.\n\nFor mature, slow-growing businesses, owner earnings and FCFE converge because maintenance ≈ total capex. For growing businesses, owner earnings are significantly higher than FCFE, reflecting true owner-available cash if growth investments were paused. Estimating maintenance capex is subjective — Buffett often anchored it to depreciation or used management's stated maintenance figures.

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The crucial innovation is 'maintenance capex' rather than total capex. GAAP depreciation reflects historical costs; owner earnings uses the economic capex needed to preserve the business's earning power. If a business spends $200M on capex but only $120M is maintenance (the other $80M is growth), owner earnings subtract $120M, not $200M or the $95M of GAAP depreciation.

For Sunridge Consumer Products: Net income $340M, D&A $75M, total capex $180M (estimated maintenance $95M), working capital investment $25M. Owner earnings = 340 + 75 − 95 − 25 = $295M.

Differences from FCFE: FCFE subtracts total capex and adds net borrowing. Owner earnings subtracts only maintenance capex and ignores financing flows. Owner earnings isolates the sustainable cash flow available before deciding whether to reinvest for growth or return to shareholders. FCFE already reflects growth capex as a capital consumption.

For mature, slow-growing businesses, owner earnings and FCFE converge because maintenance ≈ total capex. For growing businesses, owner earnings are significantly higher than FCFE, reflecting true owner-available cash if growth investments were paused. Estimating maintenance capex is subjective — Buffett often anchored it to depreciation or used management's stated maintenance figures.

What is Buffett's owner earnings formula and how does it differ from FCFE?

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