Adjusted EBITDA
Adjusted EBITDA is regular EBITDA with one-time or non-cash items added back — it's the 'clean' earnings number that M&A deals are actually priced on.
Definition
Adjusted EBITDA is a modified version of EBITDA that adds back non-recurring, non-cash, or non-operational expenses to present a cleaner picture of a company's normalized, ongoing operating profitability. Common adjustments include stock-based compensation, one-time restructuring charges, litigation costs, and transaction fees. In M&A, Adjusted EBITDA is the metric that actually drives valuation — the purchase price is almost always based on an Adjusted EBITDA multiple.
Formula
Adjusted EBITDA = EBITDA + Stock-Based Compensation + One-Time Charges + Restructuring Costs + Other Non-Recurring Items
EBITDA
Earnings Before Interest, Taxes, Depreciation, and Amortization — the starting point
Stock-Based Compensation (SBC)
Non-cash expense that reduces reported earnings but doesn't consume cash in the period
One-Time Charges
Expenses not expected to recur — litigation settlements, asset write-downs, etc.
Restructuring Costs
Severance, facility closures, and other charges from operational overhauls
Other Non-Recurring Items
Transaction fees, consulting costs, and any other items outside normal operations
Adjusted EBITDA Bridge
Walking from reported to adjusted figures ($M)
$50M
GAAP EBITDA
$+8M
+ SBC
$+5M
+ Restructuring
$+3M
+ One-Time Legal
$+2M
+ Transaction Fees
$+2M
+ Lease Adj.
$70M
Adjusted EBITDA
Common EBITDA Add-Backs
Items most frequently adjusted in M&A contexts
Stock-Based Compensation
Very CommonNon-cash expense, adds back to show cash earnings
Restructuring Charges
Very CommonOne-time costs for layoffs, facility closures
Litigation / Legal Costs
Very CommonNon-recurring legal settlements or fees
Transaction / Advisory Fees
Very CommonM&A-related costs not part of ongoing operations
Owner Compensation Adj.
Above-market salary paid to owner in private cos
Lease / Rent Adjustments
Above/below market lease normalization
Buyer vs. Seller Adjustments
Same company, very different EBITDA figures
How Adjusted EBITDA Differs from EBITDA
While EBITDA strips out interest, taxes, and non-cash depreciation and amortization, Adjusted EBITDA goes further by removing items that distort the picture of ongoing operational performance. A company undergoing a major restructuring might report depressed EBITDA due to one-time severance and facility closure costs, but its Adjusted EBITDA would add those back to show what normalized profitability looks like. The distinction matters enormously in deal contexts because buyers and sellers frequently negotiate over which adjustments are legitimate. Adjusted EBITDA is the number that actually appears in purchase agreements and bank lending documents.
Common Add-Backs in M&A
Stock-based compensation is one of the most debated add-backs — sellers argue it's non-cash, while some buyers counter that it represents real economic cost that must be replaced with cash compensation post-acquisition. Restructuring charges, litigation settlements, and transaction-related fees are more widely accepted add-backs because they are clearly non-recurring. Run-rate adjustments for recently completed initiatives (e.g., a new contract just signed, a cost-cutting program just implemented) are among the most aggressive and contentious adjustments. The quality of Adjusted EBITDA adjustments directly impacts the EV/EBITDA multiple a buyer is willing to pay.
Adjusted EBITDA in Deal Negotiations
In virtually every M&A transaction, the purchase price is expressed as a multiple of Adjusted EBITDA, making the definition of adjustments a critical negotiation point. Sellers have strong incentives to maximize Adjusted EBITDA by including aggressive add-backs, while buyers push back to keep the number conservative. Quality of Earnings (QoE) reports — prepared by accounting firms during due diligence — scrutinize each adjustment to determine if it's truly non-recurring and properly calculated. A $5M add-back at a 10x multiple swings the purchase price by $50M, so these negotiations are high-stakes and detailed.
Interview Context and Red Flags
Interviewers love asking about Adjusted EBITDA because it tests whether you understand the real-world mechanics of deal pricing versus textbook definitions. Strong candidates can name 4-5 common add-backs and explain why each is (or isn't) appropriate. Red flags to mention: if a company's Adjusted EBITDA is consistently 30%+ higher than reported EBITDA, the adjustments may be overly aggressive. Another red flag is when 'one-time' charges appear every single year — they're not really one-time. Knowing these nuances separates strong candidates from those who just memorize formulas.
Worked Example — With Real Numbers
A company reports: Revenue $500M, EBITDA $80M. During the year, it incurred $10M in restructuring charges (closing two plants), $8M in SBC expense, $3M in one-time litigation settlement, and $2M in M&A advisory fees. Adjusted EBITDA = $80M + $10M + $8M + $3M + $2M = $103M. At a 10x EV/EBITDA multiple, the deal prices at $1.03B on Adjusted EBITDA versus only $800M on reported EBITDA — a $230M difference driven entirely by the adjustments.
Key Takeaways
Adjusted EBITDA is the actual metric used to price M&A deals — not raw EBITDA
Common add-backs: SBC, restructuring charges, one-time litigation, transaction fees, and run-rate adjustments
Quality of Earnings reports scrutinize adjustments during due diligence — aggressive add-backs get challenged
SBC is the most debated add-back: non-cash but represents real economic cost
If 'one-time' charges recur every year, they're not really one-time — a key red flag
Common Mistakes in Interviews
Treating all add-backs as automatically legitimate — buyers aggressively challenge adjustments during due diligence
Confusing Adjusted EBITDA with pro forma EBITDA — pro forma adjusts for the combined entity post-deal, Adjusted EBITDA normalizes the standalone company
Forgetting that SBC is controversial — some buyers (especially PE) add it back, while others (especially strategic acquirers) do not
Not understanding that Adjusted EBITDA directly impacts debt capacity — lenders also base leverage covenants on this metric
How Interviewers Test This
When discussing Adjusted EBITDA, always mention that it's what deals are actually priced on and that Quality of Earnings diligence scrutinizes every adjustment. A sophisticated point: note that SBC add-backs are more accepted in PE (where cash flow to equity matters) than in strategic acquisitions (where the acquirer will need to continue paying employees).
Related Concepts
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EBITDA
EBITDA (Earnings Before Interest, Taxes, [Depreciation and Amortization](https:/...
Stock-Based Compensation (SBC)
Stock-based compensation (SBC) is a non-cash expense recognized when a company g...
Restructuring (Investment Banking)
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EV/EBITDA Multiple
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