Modified Owner Earnings Calculator
Modified owner earnings estimates the cash a business truly generates for its owners: start from net income, add back non-cash charges, then subtract capital expenditures and the increase in working capital. Add a market cap and a share count and the same run also returns the owner earnings yield, the implied P/OE multiple and owner earnings per share, the three figures that turn a cash estimate into a valuation check.
Estimate only. Use multi-year averages and maintenance (not growth) capex for a serious valuation; this is not investment advice. See the Buffett comparison section for exactly where this modified formula departs from the 1986 definition.
Quick Answer
For the worked example, net income of $500,000 plus $120,000 of non-cash charges, minus $200,000 of capex and a $50,000 working capital increase, gives modified owner earnings of $370,000. Against an $8,000,000 market cap that is a 4.63% owner earnings yield and a 21.6x P/OE multiple, or $0.37 per share on 1,000,000 shares. The calculator is pre-filled with exactly these figures.
Key takeaways
- The core arithmetic matches Buffett’s 1986 formula. The modifications are scope choices, stated on this page: one combined non-cash field, the capex you enter rather than an enforced maintenance average, and a signed working capital line.
- Only net income is required. Non-cash charges, capex and working capital left blank count as $0, and the yield and per-share lines appear only when you give a usable market cap or share count.
- Maintenance capex is the input that decides the answer. Enter total capex for a growing company and you will understate its owner earnings.
- Negative results are real outputs here, not errors: a loss year with heavy capex returns negative owner earnings, and the yield shown beside it is arithmetic, not a buy signal.
- Quick Answer
- How to use the modified owner earnings calculator
- The formula, and the 1986 definition it modifies
- Worked example: $370,000 of owner earnings, checked line by line
- Why net income alone misleads, and where each input lives
- Maintenance capex: the judgment call that decides the answer
- What competing calculators miss
- Frequently asked questions
- Add This Calculator to Your Website
- References
How to use the modified owner earnings calculator
Enter net income, add the three adjustments, and click Calculate. The results stay hidden until you do, and every line of the build-up is printed so you can audit the sum.
- Net income (required): the reported figure for the period. It may be negative. Blank or non-numeric is the one hard stop: the tool answers “Enter the net income.”
- Non-cash charges: depreciation, amortization, depletion, impairments and similar items from the cash flow statement. Blank counts as $0; a negative value is rejected.
- Capital expenditures: for a Buffett-style result, enter average maintenance capex, not the year’s total. Blank counts as $0; a negative value is rejected.
- Working capital increase: the rise in working capital during the period. A fall is entered as a negative number and is added back. Blank counts as $0.
- Optional valuation fields: market cap adds the yield and P/OE lines, shares outstanding adds the per-share line. Zero or negative values in either field are quietly ignored, with no error.
One behaviour worth knowing before you rely on the output: when owner earnings are exactly $0 and a market cap is entered, the tool prints a P/OE multiple of 0.0x rather than leaving the line blank. Treat that as “not meaningful”, the same way you would treat the multiple on a negative result.
The formula, and the 1986 definition it modifies
Modified owner earnings = net income + non-cash charges – capital expenditures – increase in working capital. The yield is owner earnings divided by market cap, the P/OE multiple is market cap divided by owner earnings, and the per-share figure is owner earnings divided by shares outstanding.
Owner earnings yield = owner earnings ÷ market cap | P/OE = market cap ÷ owner earnings | Per share = owner earnings ÷ shares
Warren Buffett set out the original in Berkshire Hathaway’s 1986 annual report, in words GuruFocus reproduces in full: owner earnings are (a) reported earnings plus (b) depreciation, depletion, amortization and certain other non-cash charges, less (c) the average annual amount of capitalized expenditures the business requires to fully maintain its long-term competitive position and its unit volume, with any additional working capital required for that same purpose also included in (c). The same definition, restated as net income plus depreciation and amortization minus maintenance capex minus change in working capital, is the one Finbox documents for its owner earnings data. Berkshire’s own framing of why the number matters sits in its Owner’s Manual: intrinsic value is the discounted value of the cash that can be taken out of a business during its remaining life, and owner earnings is the annual estimate of that cash.
Exactly where this modified version departs from 1986
The arithmetic is identical; three scope choices are not, and each one is disclosed here rather than hidden in the code.
| Line | Buffett, 1986 | This modified tool |
|---|---|---|
| Non-cash add-back | Depreciation, depletion, amortization and certain other non-cash charges | One field accepting any non-cash charges you total yourself, broader and less specific |
| Capex subtracted | The average annual amount required to maintain competitive position and unit volume (maintenance capex, averaged) | Whatever capex figure you type in, single period, total or maintenance. The averaging and the maintenance split are your job |
| Working capital | The increment included only if additional working capital is required to maintain position and volume | The signed increase you enter: a decrease entered as a negative is added back in full, which goes one step beyond the 1986 wording |
None of those three changes the direction of the formula, but each can move the result. A user who enters total capex and a full working capital swing gets a harsher number than Buffett’s maintenance-only, averaged version. The tool’s defence is transparency: the build-up is printed line by line under every result.
Worked example: $370,000 of owner earnings, checked line by line
Net income $500,000, non-cash charges $120,000, capex $200,000, working capital increase $50,000. The sum is 500,000 + 120,000 – 200,000 – 50,000 = $370,000. The badge under the results reads that as 74.0% of reported net income: for every dollar of accounting profit, 74 cents survive as owner cash on these inputs.
Four more runs of this calculator, covering the cases investors actually argue about, are tabulated here. Every row reproduces exactly in the tool.
| Scenario | Owner earnings | Yield | P/OE | Per share |
|---|---|---|---|---|
| Worked example (above), $8.0m cap, 1.0m shares | $370,000.00 | 4.63% | 21.6x | $0.37 |
| Asset-light: NI $1,200,000, NC $150,000, capex $90,000, WC $60,000, $20.0m cap, 2.0m shares | $1,200,000.00 | 6.00% | 16.7x | $0.60 |
| Heavy capex: NI $800,000, NC $400,000, capex $650,000, WC $100,000, no valuation fields | $450,000.00 | not shown | not shown | not shown |
| Working capital released: worked example with WC -$50,000 | $470,000.00 | not shown | not shown | not shown |
| Loss year: NI -$100,000, NC $80,000, capex $150,000, WC $20,000 | $-190,000.00 | not shown | not shown | not shown |
The asset-light row is the pattern value investors hunt: capex well below the non-cash add-back, so owner earnings land at 100% of net income even after a working capital build. The heavy-capex row shows the opposite discipline, where $650,000 of plant spending cuts accounting profit’s cash value nearly in half. Both patterns start from figures pulled off the cash flow statement, whose structure of net income adjusted for non-cash items and working capital changes is set out in DFIN’s guide to cash flow statement reporting.
Why net income alone misleads, and where each input lives
Net income is an accrual figure: it charges depreciation for assets paid for years ago and ignores cash collected or owed this year. Owner earnings walks it back toward cash in both directions, which is why the two numbers diverge most for capital-heavy and fast-growing businesses.
- Depreciation and amortization reduce profit without a payment. They are real economic costs over an asset’s life, which is why the formula adds them back and then charges maintenance capex separately, instead of pretending the assets are free.
- Capital expenditures are the reverse gap: cash out the door this year that the income statement spreads across decades. How to isolate the capex line from a cash flow statement, including rebuilding it from the PP&E roll-forward when it is bundled, is covered in LegalClarity’s capex calculation guide.
- Working capital is the quiet one. A growing business books profit on sales it has not collected and stock it has not sold. The operating section logic for those adjustments, asset increases subtract and liability increases add, is walked through in Ramp’s operating cash flow explainer.
Once you have a per-share owner earnings figure, it slots into the wider valuation toolkit rather than replacing it. A company valuation calculator weighs the whole business from several angles, the capitalization of earnings method turns a single earnings figure and a cap rate into a value directly, and comparing owner earnings with the accounting residual in the abnormal earnings calculator shows how much of the gap is depreciation policy versus real cash. For the cash-per-share cross-check against reported figures, the cash flow per share calculator uses the statement’s own operating cash flow instead.
Maintenance capex: the judgment call that decides the answer
Buffett was blunt that the capex line “must be a guess”. Companies report one capex number; the split between keeping the plant running and expanding it exists only in management’s head. Two working methods narrow the guess:
- The quiet-year method: find years when unit volume was flat and treat that capex as maintenance. Growth years’ excess over it is expansion.
- The depreciation ratio method: for asset-light businesses, practitioners often estimate maintenance capex at roughly 50 to 80% of depreciation, then sanity-check the result against the quiet-year figure. For asset-heavy businesses the ratio runs at or above 100%, because replacement cost inflates past historical-cost depreciation.
Whichever method you use, average it. Buffett’s definition asks for the average annual amount precisely because capex is lumpy: a plant refit every seven years is a real annual cost of one-seventh of the refit, not a free six years followed by a catastrophic seventh. The deeper treatment of why this split is the whole game, and how growth capex differs in kind from maintenance capex, is laid out in this deep dive into owner earnings, and the contrast with free cash flow’s subtract-everything approach is drawn sharply in Hedge Fund Alpha’s owner earnings vs free cash flow comparison.
What competing calculators miss
Owner earnings tools are rarer than free cash flow tools, and the few that exist mostly stop early:
- Single-number clones: the direct rival computes the same four-input formula and returns one figure, with no yield, no multiple and no per-share line. A cash figure with no price next to it cannot tell you whether the stock is cheap.
- Spreadsheet templates: downloadable owner earnings workbooks add DCF projections and cross-checks against reported free cash flow, at the cost of a download, a spreadsheet program and trusting someone else’s cell formulas. One widely shared template also caps the working capital deduction at the increase only, so a working capital release never lifts its result; this tool’s signed line handles both directions, disclosed in the comparison table above.
- Intrinsic value calculators: full Buffett valuation tools project ten years of owner earnings and discount them, which buries the one-year figure under growth and discount-rate assumptions. Useful later; the wrong place to check whether this year’s number is even built correctly.
- The gap this page fills: the auditable build-up printed line by line, the three valuation outputs in the same run, the signed working capital behaviour stated openly, and an explicit table of where the modified formula departs from the 1986 text it is named after.
Frequently asked questions
Modified owner earnings = net income + non-cash charges – capital expenditures – the increase in working capital. It estimates the cash a business generates for its owners after paying to maintain itself. With the worked example figures, $500,000 + $120,000 – $200,000 – $50,000 = $370,000.
Buffett defined owner earnings in Berkshire Hathaway’s 1986 annual report as reported earnings plus depreciation, depletion, amortization and certain other non-cash charges, less the average annual capital spending needed to fully maintain competitive position and unit volume, plus any working capital increment required for the same purpose. This modified version differs in three stated ways: it accepts all non-cash charges in one field rather than naming depreciation and amortization, it subtracts the capital expenditures you enter rather than enforcing a multi-year average of maintenance capex, and it subtracts the working capital increase you enter, including adding a decrease back when you enter a negative figure.
Depreciation, amortization, depletion, impairment charges and other expenses that reduced reported income without a cash payment in the period. They sit on the cash flow statement, which starts from net income and adjusts for exactly these items and for working capital changes before arriving at operating cash flow.
Maintenance capex: the spending required to sustain current earning power and unit volume. That is the figure Buffett’s definition calls for, as a multi-year average. Entering total capex, which includes growth projects, charges the business for expansion it could choose not to make and understates owner earnings for a growing company.
Growth ties cash up in receivables and inventory before that cash can reach owners. A $50,000 increase in working capital is $50,000 the business earned on paper but cannot distribute. If working capital fell, enter the decrease as a negative number and the tool adds it back, because that cash was released.
There is no fixed cutoff. The classic comparison is against the long-term government bond yield available at the time: owner earnings yield meaningfully above that rate, from a business you judge durable, is the traditional value setup. The yield here is owner earnings divided by market cap, $370,000 on an $8,000,000 market cap = 4.63% in the worked example.
Reported free cash flow is operating cash flow minus all capital expenditures, growth spending included. Owner earnings aims to subtract maintenance capex only, and starts from net income with explicit add-backs instead of from the reported operating cash flow line. For a growing company owner earnings is usually the higher, more sustainable figure; for a shrinking one they converge.
Yes. A loss-making year, heavy maintenance capex or a large working capital build can each push it below zero: net income of -$100,000 with $80,000 of non-cash charges, $150,000 of capex and a $20,000 working capital increase gives -$190,000 in this tool. Negative owner earnings mean the business consumed more cash than it produced at its current scale, and any yield or multiple shown for it is not meaningful.
Yes, for any serious valuation. Buffett’s definition builds the averaging into the capex line itself, calling for the average annual amount. Average each input over roughly five years, strip one-off items such as litigation or asset sales from net income, then enter the averages. A single noisy year produces a precise-looking number with little information in it.
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References
- GuruFocus. Price-to-Owner-Earnings: Buffett’s 1986 Owner Earnings Definition, Quoted in Full. Accessed October 22, 2026.
- Finbox. Owner Earnings: Definition Based on Buffett’s 1986 Berkshire Hathaway Letter. Accessed October 22, 2026.
- Berkshire Hathaway. Owner’s Manual: Intrinsic Value as the Discounted Cash That Can Be Taken Out of a Business. Accessed October 22, 2026.
- Hedge Fund Alpha. Warren Buffett: Owner Earnings vs Free Cash Flow. Accessed October 22, 2026.
- MarketXLS. Owner Earnings Calculator Excel: Buffett Valuation Template (Working Capital Increase Treatment). Accessed October 22, 2026.
- The Principled Portfolio. The True Engine of Value: A Deep Dive into Owner Earnings. Accessed October 22, 2026.
- DFIN Solutions. Preparing Cash Flow Statements: SEC Reporting and Filing Requirements. Accessed October 22, 2026.
- Ramp. Cash Flow From Operating Activities: Formula and Examples. Accessed October 22, 2026.
- LegalClarity. How to Calculate CapEx from a Cash Flow Statement. Accessed October 22, 2026.
- Investing for Beginners. How Warren Buffett Calculates Intrinsic Value. Accessed October 22, 2026.