What Is EBITDA? Formula, Margin, and Why Buffett Rejects It

EBITDA stands for earnings before interest, taxes, depreciation, and amortization. The metric strips four real expenses out of net income to isolate what the core business earns before financing choices, tax jurisdiction, and accounting policy distort the picture. Check any ticker's EV/EBITDA multiple on a stock page to see how the market prices operating earnings.

Why EBITDA Matters

John Malone popularized EBITDA in the 1970s at cable operator TCI. Depreciation on set-top boxes and network gear crushed reported earnings while the underlying business threw off cash. Malone wanted a number that showed lenders the debt-service capacity the GAAP income line hid. The 1980s LBO boom picked up the same logic: private equity still anchors deals on the enterprise value to EBITDA multiple because the ratio scales with how much debt a target can carry.

EBITDA also travels better than net income. Two companies in the same industry can print very different profits because one sits in a low-tax country or carries more debt. Stripping interest and taxes out makes cross-border peers comparable; stripping depreciation and amortization out makes firms with different capital vintages comparable. Sell-side analysts quote EV/EBITDA alongside P/E, and lenders write covenants on debt-to-EBITDA.

How EBITDA Works

Two derivations give the same number. Pick whichever matches the data you have.

Bottom-up (from net income):

Top-down (from revenue):

Worked example. A mid-cap software firm reports $800M revenue, $300M COGS, and $250M operating expenses that include $60M of depreciation and amortization (D&A).

Operating income (EBIT) = 800 − 300 − 250 = $250M. EBITDA = 250 + 60 = $310M. The 38.75% EBITDA margin (310 / 800) tells you most of each revenue dollar survives operating costs before accounting charges.

Stock-based compensation sits inside operating expenses, so standard EBITDA deducts it. Many tech firms add it back under "adjusted EBITDA," a choice, not a rule. EBITDA is non-GAAP: US standards do not define it, so two companies can report slightly different numbers for the same reality.

EBITDA Margin by Sector

Sector benchmarks from Damodaran's global dataset show how far margins spread across industries. Compare a stock against its own sector, never the market average.

High margin with low capex is the combination that makes software screen cheap on EV/EBITDA and expensive on P/E at the same time. The utility row flips the logic: headline margin looks generous until you notice the recurring capex and the regulator capping allowed returns. Same ratio, different story.

Where EBITDA Misleads

Charlie Munger put the critique plainly in Poor Charlie's Almanack:

Every time you see the word EBITDA, you should substitute the words "bullshit earnings."

The items stripped out are real costs, not accounting noise. Depreciation is the accounting record of capex already spent. Ignoring depreciation and amortization treats a worn-out fleet as free. Firms whose capex matches depreciation run in place; firms below that line are, as Seth Klarman put it, in gradual liquidation.

Three examples show how EBITDA can be weaponized:

• WorldCom (2002): capitalized roughly $3.8B of operating line costs as assets, spreading them into future depreciation. EBITDA stayed clean, reported profit inflated, and the scheme became the largest US accounting fraud of its era.
• Waste Management (1992-1997): extended the useful lives of trucks and dumpsters by 5-10 years to cut depreciation by $1.7B. Higher EBIT, higher margin, zero change in the real business.
• WeWork (2018): introduced "community-adjusted EBITDA," adding back marketing, G&A, and design costs on top of the usual four. The $233M number presented to bondholders turned a deeply cash-burning business into an apparent earner.

The tamer cousin of these scandals is adjusted EBITDA. Most S&P 500 tech firms add back stock-based compensation, restructuring, legal settlements, and integration costs. Each add-back has a defense. The problem is the lack of a GAAP standard: what counts as "one-time" is management's call. The gap between GAAP EBITDA and adjusted EBITDA is where financial engineering lives. The gap between EBITDA and free cash flow is where reality lives.

Cyclicals mislead too. A cyclical stock prints peak EBITDA and looks cheap on the multiple right before earnings collapse. Pair EBITDA with net profit margin and capex history before trusting it.

Open a stock page to see EV/EBITDA next to the P/E, margin, and cash flow numbers that put it in context. The stock fundamentals guide shows where EBITDA fits in the toolkit.

Frequently Asked Questions

What is the difference between EBITDA and operating cash flow? EBITDA adds back non-cash charges but ignores working-capital swings and cash taxes. Operating cash flow captures both. A company can post rising EBITDA while receivables balloon and cash actually drains. The gap widens for firms with long sales cycles or seasonal inventory. Check the cash flow statement before trusting the EBITDA trend.

Is a high EBITDA margin always good? No. Utilities and pipelines show 40%+ EBITDA margins because they carry enormous ongoing capex that depreciation and amortization only partially capture. A 40% software margin and a 40% utility margin describe very different businesses. Compare within the same sector, and always weigh margin against the capex intensity that produced it.

What does "adjusted EBITDA" mean and should I trust it? Adjusted EBITDA adds back items management labels one-off or non-core: stock-based compensation, restructuring, legal settlements, acquisition costs. Some add-backs are defensible. A persistent gap between GAAP EBITDA and adjusted EBITDA usually hides recurring costs dressed up as exceptional. Read the footnotes, track the gap over multiple years, and discount heavily when add-backs grow faster than revenue.

Why do Warren Buffett and Charlie Munger reject EBITDA? Buffett calls depreciation "a real cost, every bit as real as payroll or raw materials" and refuses to buy companies where management frames valuation around EBITDA. Munger's line that the word equals "bullshit earnings" is the blunter version of the same idea. Their point is that interest, taxes, depreciation, and amortization are cash claims on the business, not accounting noise that can be waved away.