EBITDA is earnings before interest, taxes, depreciation, and amortization — a company's operating profitability with financing costs, taxes, and non-cash charges stripped back out. There are two equivalent ways to compute it: bottom-up, starting from net income and adding those four items back, or top-down, starting from operating income and adding back only depreciation and amortization. Every input comes off the income statement, and the two builds land on the same number unless something non-operating sits between operating income and net income.
You need this formula in three situations: comparing companies that carry different debt loads or tax rates, working with valuation multiples like EV/EBITDA, and exam problems that hand you a partial income statement and ask you to rebuild the metric. The detail most textbooks skip is that the two builds can disagree — and knowing why is usually worth more marks than the arithmetic.
EBITDA = Net income + Interest expense + Tax expense + Depreciation + Amortization
Net income — The bottom line of the income statement, after every expense has been deducted
Interest expense — The cost of debt financing — added back because it reflects capital structure, not operations
Tax expense — The income tax provision — added back because it depends on jurisdiction and tax planning
Depreciation — Non-cash allocation of tangible asset cost (machines, vehicles, buildings) over useful life
Amortization — Non-cash allocation of intangible asset cost (patents, software, acquired customer lists)
EBITDA = Operating income + Depreciation + Amortization
Operating income — Revenue minus cost of goods sold and operating expenses; also called EBIT when there are no non-operating items
Depreciation — The same depreciation figure used in the bottom-up build
Amortization — The same amortization figure used in the bottom-up build
The bottom-up build carries everything inside net income except the four add-backs — including non-operating items such as a gain on an asset sale, interest income, or a one-off settlement. The top-down build never sees those items, because they sit below operating income on the statement. So when a company has non-operating income or expenses, the two builds differ by exactly those amounts. That is not an error; it is a prompt to decide, deliberately, whether the item belongs in your EBITDA.
Every line comes from the income statement — if you can read one confidently, the formula is just picking lines off it. Understanding the income statement walks through that structure; here is what each input contributes.
Net income is the bottom line — revenue minus every expense, including the four items you are about to add back. It anchors the bottom-up build precisely because it has already absorbed everything.
Interest expense is the cost of borrowed money. It gets added back because it reflects how the company chose to finance itself, not how well the business runs. Two identical factories show identical EBITDA even if one was bought with debt and the other with the founder's savings.
Tax expense is the income tax provision. It is added back because tax bills depend on jurisdiction, loss carryforwards, and tax planning — none of which describe operating performance.
Depreciation spreads the cost of tangible assets over their useful lives. It is a real expense but not a cash payment in the current period; the cash left when the asset was bought. How it actually gets recorded is covered in the depreciation journal entry.
Amortization does the same job for intangible assets — patents, licenses, software, acquired customer relationships. Students drop it constantly because many small firms have none, but for companies that grew by acquisition it can be enormous.
One practical warning. Real income statements often bury depreciation and amortization inside cost of goods sold or operating expenses rather than showing them as separate lines. The reliable place to find the exact D&A figure is the cash flow statement, where it is always broken out.
Ridgeline Tools Inc. finished the year with the income statement below. It includes one non-operating item — a $35,000 gain on selling old equipment — placed there deliberately, because it forces the two builds apart.
| Line item | Amount |
|---|---|
| Revenue | $4,820,000 |
| Cost of goods sold | ($2,610,000) |
| Gross profit | $2,210,000 |
| Operating expenses (before D&A) | ($1,124,000) |
| Depreciation | ($186,000) |
| Amortization | ($42,000) |
| Operating income | $858,000 |
| Gain on sale of equipment | $35,000 |
| Interest expense | ($94,000) |
| Pre-tax income | $799,000 |
| Tax expense (24%) | ($191,760) |
| Net income | $607,240 |
| Build | Step | Running total |
|---|---|---|
| Bottom-up | Net income: $607,240 | $607,240 |
| Bottom-up | Add interest expense: $94,000 | $701,240 |
| Bottom-up | Add tax expense: $191,760 | $893,000 |
| Bottom-up | Add depreciation: $186,000 | $1,079,000 |
| Bottom-up | Add amortization: $42,000 | $1,121,000 |
| Top-down | Operating income: $858,000 | $858,000 |
| Top-down | Add depreciation: $186,000 | $1,044,000 |
| Top-down | Add amortization: $42,000 | $1,086,000 |
The bottom-up build lands on $1,121,000 and the top-down build on $1,086,000 — a $35,000 gap, which is exactly the gain on the equipment sale. Net income includes that gain, so the bottom-up build drags it along; operating income never contained it, so the top-down build excludes it. Subtract the gain from the bottom-up figure and you reach $1,086,000, matching the top-down build to the dollar.
Which number is right? By the literal definition, $1,121,000 — you added back exactly interest, taxes, depreciation, and amortization, nothing more. But most analysts want EBITDA to describe repeatable operations, so they strip one-off non-operating items and report $1,086,000, usually labeled adjusted EBITDA. On an exam, follow the literal definition unless the question says otherwise; in real analysis, disclose which items you excluded.
EBITDA exists to make companies comparable. Interest depends on capital structure, taxes depend on where and how a firm is organized, and depreciation depends on asset age and accounting choices — so two operationally identical businesses can report very different net income. Stripping those items out lets you compare the underlying operations of a leveraged firm against a debt-free one, or a company in Ireland against one in California.
That comparability is why lenders write debt covenants as debt-to-EBITDA ratios, and why acquirers price businesses off it. The EV/EBITDA multiple — enterprise value divided by EBITDA — is the standard valuation shorthand: a firm trading at 8x EBITDA is priced at eight years of this measure of operating profit.
EBITDA ignores capital expenditures. Depreciation is the accounting echo of cash genuinely spent on machines and buildings, and adding it back quietly pretends those assets were free — even though they wear out and must be replaced. Warren Buffett's jab, asking whether management thinks the tooth fairy pays for capital expenditures, is blunt, but the arithmetic behind it is sound. A trucking company with an aging fleet can post a handsome EBITDA right up until the trucks need replacing.
EBITDA also ignores working capital. A company can grow EBITDA while its cash drains into unpaid customer invoices and unsold inventory. And because EBITDA is a non-GAAP measure, no rulebook forces two companies to compute it the same way — adjusted versions can quietly exclude inconvenient costs.
This is the line between EBITDA and free cash flow. The free cash flow formula starts from operating cash flow — which already reflects taxes actually paid and working-capital movements — and then subtracts capital expenditures. EBITDA answers how profitable the operations are before financing and accounting choices; free cash flow answers how much cash the business could actually hand back to its owners. A firm can post strong EBITDA and negative free cash flow for years. In short, EBITDA is not cash flow, and treating it as cash flow is the most expensive mistake made with this formula.
Treating EBITDA as cash the company holds. EBITDA is an income-statement construct. The taxes were still paid, the interest still left the bank account, and the equipment still has to be replaced. If a question asks about cash, reach for the cash flow statement instead.
Forgetting amortization. Under time pressure, students add back depreciation and stop. If the problem gives a combined depreciation-and-amortization line, use all of it; if the two are listed separately, add both. In the example above, dropping amortization understates EBITDA by $42,000.
Mixing the two builds. The top-down build starts from operating income and adds back only depreciation and amortization — never interest or taxes, which were never subtracted on the way to operating income. Starting from operating income and adding back all four items double-counts; starting from net income and adding back only D&A leaves interest and taxes missing.
Build EBITDA from net income by adding back interest, taxes, depreciation, and amortization — or from operating income by adding back only depreciation and amortization. Any gap between the two builds is a non-operating item hiding in net income, and neither build is cash flow.
Earnings before interest, taxes, depreciation, and amortization. It measures a company's profit before financing costs (interest), income taxes, and the two big non-cash charges — depreciation on tangible assets and amortization on intangibles.
Take net income from the bottom line, then add back interest expense, tax expense, depreciation, and amortization. If depreciation and amortization are not shown as separate lines, pull the combined D&A figure from the cash flow statement, where it is always broken out.
No. Operating income (EBIT) still counts depreciation and amortization as expenses; EBITDA adds them back. In the worked example, operating income is $858,000 and top-down EBITDA is $1,086,000 — the difference is the $228,000 of combined D&A.
It expresses a company's value as a number of years of EBITDA. EV/EBITDA divides enterprise value (market value of equity plus net debt) by EBITDA, so a business bought at 6x EBITDA is priced at six times its annual EBITDA. Typical multiples vary widely by industry and growth.
Yes. If a company loses money at the operating level even before depreciation and amortization are added back, EBITDA is negative — common in early-stage firms. The reverse trap also exists: a firm can show positive EBITDA while reporting a net loss, because interest, taxes, and D&A still hit below the EBITDA line.
No. EBITDA ignores taxes actually paid, changes in working capital, and capital expenditures — all real cash movements. Operating cash flow and free cash flow capture those. Read EBITDA as a rough, comparable measure of operating profitability, not as cash available to spend.
By the FinanceBrain Team · Last verified July 11, 2026 · How we produce and verify articles