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    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

    Adj

    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 Common

    Non-cash expense, adds back to show cash earnings

    🔧

    Restructuring Charges

    Very Common

    One-time costs for layoffs, facility closures

    ⚖️

    Litigation / Legal Costs

    Very Common

    Non-recurring legal settlements or fees

    🤝

    Transaction / Advisory Fees

    Very Common

    M&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

    Adjustment
    Buyer (Conservative)
    Seller (Aggressive)
    SBC Add-Back
    May exclude — it's a real cost
    Always add back — non-cash
    Synergies
    Only include highly certain ones
    Include all projected synergies
    Growth CapEx
    Treat as recurring expense
    Classify as one-time / growth
    COVID Impact
    Normalize upward if benefited
    Normalize downward if hurt
    Run-Rate Revenue
    Use conservative ramp
    Annualize best month × 12

    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

    1

    Adjusted EBITDA is the actual metric used to price M&A deals — not raw EBITDA

    2

    Common add-backs: SBC, restructuring charges, one-time litigation, transaction fees, and run-rate adjustments

    3

    Quality of Earnings reports scrutinize adjustments during due diligence — aggressive add-backs get challenged

    4

    SBC is the most debated add-back: non-cash but represents real economic cost

    5

    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).

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