Owner Earnings: Buffett's Method for Calculating the True Value of a Business
In the 1986 Berkshire Hathaway shareholder letter, Warren Buffett introduced one of his most important conceptual contributions to investment analysis: owner earnings. He had grown frustrated with how financial media and academics focused on reported earnings per share and even operating cash flow, arguing that both metrics systematically misrepresented the true earnings available to owners.
The concept Buffett introduced was simultaneously simple and radical: what matters is not what shows up in accounting statements, but what the owner can actually take out of the business without impairing its competitive position.
This article is for educational purposes only and does not constitute financial advice.
The Original Buffett Definition
From the 1986 Berkshire letter:
"These represent (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."
In simplified formula form:
Owner Earnings = Net Income + D&A - Maintenance CapEx - Stock-Based Compensation ± Changes in Working Capital
The key element -- the one that most distinguishes owner earnings from both EPS and free cash flow -- is the separation of maintenance CapEx from growth CapEx.
Why Reported EPS Gets It Wrong
Reported EPS includes depreciation as an expense. Depreciation is an accounting estimate of asset wear -- but it is a non-cash charge. A company that buys a machine for $10M and depreciates it over 10 years records $1M/year in depreciation expense even though no cash leaves the business in that year.
This causes EPS to understate cash generation for businesses where depreciation well exceeds maintenance capital requirements -- common in capital-light businesses, digital platforms, and consumer brands.
But the opposite problem exists too: depreciation can overstate cash generation for businesses where actual capital consumption exceeds accounting depreciation. A railroad, oil refinery, or semiconductor fab may need to spend significantly more than their D&A just to stay competitive. Adding D&A back to earnings without subtracting the true maintenance CapEx produces an overly optimistic picture.
Why Standard Free Cash Flow Gets It Wrong
Standard Free Cash Flow = Operating Cash Flow - Total CapEx
This version subtracts all capital expenditures, including both maintenance (replacing existing capacity) and growth (expanding into new markets or technologies). In a year when a company makes a large strategic investment -- a new factory, a data center buildout, an acquisition -- FCF craters even though the underlying earnings power of the existing business may be unchanged or improving.
This is the mirror problem. Free cash flow understates true earnings power in growth-investment years and overstates it in harvest years.
Owner earnings solves this by using only maintenance CapEx in the calculation. Growth CapEx is treated separately -- as an investment decision to be evaluated on its own return merits.
Maintenance CapEx: The Hard Part
The most difficult aspect of owner earnings is estimating maintenance CapEx. Unlike total CapEx, which companies report directly, maintenance CapEx is almost never disclosed separately.
Three practical approaches:
1. Use Depreciation as a Proxy For many businesses, annual depreciation is a reasonable estimate of maintenance CapEx. The logic: depreciation reflects management's accounting estimate of asset consumption, which often tracks closely with what must be spent to replace that consumption. This works best for businesses with stable, long-lived asset bases.
2. Analyst Notes and Investor Presentations Some companies explicitly disclose the maintenance vs. growth split in investor presentations, particularly capital-intensive businesses like utilities, industrials, and telecom companies. Mine 10-K filings for footnotes that discuss capital spending plans.
3. Long-Run Average CapEx During Periods of Stable Revenue Find a period in the company's history when revenue was roughly stable (not growing or shrinking dramatically). Average CapEx over that period represents a rough estimate of what is required just to maintain the business. This method is particularly useful for cyclical companies.
A Worked Example: Comparing EPS, FCF, and Owner Earnings
Hypothetical manufacturing company:
| Line Item | Amount |
|---|---|
| Net Income | $50M |
| Depreciation & Amortization | $20M |
| Total CapEx | $35M |
| Estimated Maintenance CapEx | $15M |
| Stock-Based Compensation | $5M |
| Working Capital Change | -$3M |
Reported EPS basis (oversimplified): Net Income = $50M ← looks like $50M of earnings power
Standard Free Cash Flow: $50M + $20M - $35M = $35M ← looks like earnings power of only $35M (depressed by growth CapEx)
Owner Earnings: $50M + $20M - $15M (maintenance CapEx only) - $5M (SBC) - $3M (WC change) = $47M
The three methods produce very different figures. Which is most relevant?
- EPS of $50M ignores the capital the business needs to maintain itself
- FCF of $35M penalizes growth investment that will generate future returns
- Owner Earnings of $47M represents the sustainable cash earnings of the current business
For long-term valuation purposes, owner earnings is the most useful measure.
The Stock-Based Compensation Adjustment
Buffett's original owner earnings formula (from 1986) predated the explosion of stock-based compensation. The formula should be updated to subtract SBC as a real ongoing expense.
Many companies report "adjusted earnings" or "non-GAAP earnings" that explicitly exclude SBC, making management look more productive than they actually are. But stock grants dilute existing shareholders, reducing per-share value. Owner earnings calculated without deducting SBC presents an optimistic picture for heavily equity-compensating companies.
Rule of thumb: if annual SBC exceeds 2-3% of market capitalization, the impact is material and should be deducted from owner earnings calculations.
Why Buffett Values Businesses on Owner Earnings
Buffett has repeatedly stated that he values businesses by estimating owner earnings over 10-20 years, discounting at an appropriate rate. This is a private-equity-style perspective: what would I actually receive as the owner of this business, in cash, over time?
The focus on owner earnings is consistent with his preference for "capital-light" businesses. A business that generates $100M in owner earnings while deploying only $200M of capital (50% owner earnings yield on capital) is radically more attractive than a business requiring $1B of capital to generate the same $100M (10% yield). The first business compounds per-share value at an extraordinary rate; the second barely creates value above its cost of capital.
Practical Application: Screening with Owner Earnings
When evaluating any stock, add these owner earnings calculations to your standard analysis:
Step 1: Estimate maintenance CapEx Pull 5-10 years of CapEx data and revenue data. Identify periods of stable revenue and use average CapEx from those periods as a maintenance baseline.
Step 2: Calculate owner earnings Net Income + D&A - Maintenance CapEx - SBC ± Working Capital Changes
Step 3: Calculate owner earnings yield Owner Earnings / Market Capitalization
An owner earnings yield of 7-10%+ (equivalent to a price-to-owner-earnings multiple of 10-14x) is generally considered attractive. Below 4% (25x+) requires exceptional growth prospects or unusual safety to justify.
Step 4: Compare owner earnings growth over 5-10 years Is the owner earnings per share growing? Businesses that consistently grow owner earnings per share while maintaining high returns on capital are the compounding machines that Buffett seeks.
The Owner Earnings Mindset
The deeper value of the owner earnings concept is not the formula itself -- it is the mindset it instills. Instead of asking "what did the accountants record as profits?", you ask "what would I actually receive as the private owner of this business, in perpetuity?"
This shift reframes the analysis from accounting performance to economic reality. It forces you to confront maintenance capital consumption, dilution from equity grants, and working capital dynamics that often hide in plain sight on the cash flow statement.
As Buffett said, the goal is not to identify businesses with high reported earnings -- it is to identify businesses with high owner earnings that are sustainable, growing, and available to shareholders at a sensible price.
That combination -- durable owner earnings power at a fair price -- is the foundation of Buffett's investment framework and one of the most reliable paths to long-term wealth creation in equity markets.
All content is for educational purposes only. This is not financial advice. Always conduct your own due diligence before making investment decisions.