What is EBITDA?

EBITDA stands for Earnings Before Interest, Taxes, Depreciation, and Amortization. It’s a measure of a company’s operating profitability that strips out financing decisions (interest), tax structure (taxes), and accounting choices (depreciation and amortization).

The reason it matters for M&A: when valuing a business, buyers want to understand its operating cash-generating ability independent of how the current owner has structured the financing, taxes, or capital base. Two identical businesses might have different net income simply because one has more debt or different depreciation schedules; EBITDA strips that out to compare them on operating performance alone.

In lower-middle-market M&A (deals from roughly $5M to $500M), EBITDA is the dominant valuation metric. A business is typically valued as a multiple of its (adjusted) EBITDA — for example, a $3M EBITDA business selling at 6x is valued at $18M enterprise value.

The EBITDA Formula

There are two equivalent ways to calculate EBITDA, depending on which line items you’re starting from:

From net income (bottom-up):

• Net Income (pre-tax)
• + Interest expense
• + Tax expense
• + Depreciation
• + Amortization
• = EBITDA

From operating income (top-down):

• Operating Income (EBIT)
• + Depreciation
• + Amortization
• = EBITDA

Both calculations should produce the same number for a given business. Most CPAs and brokers work from net income because it’s the most commonly reported starting point in small-business financial statements.

Adjusted EBITDA: The Real M&A Metric

Raw EBITDA isn’t actually what buyers value businesses on. They value on Adjusted EBITDA — raw EBITDA plus a set of one-time, non-recurring, or owner-specific add-backs that won’t continue under new ownership.

Common adjusted EBITDA add-backs include:

• Owner compensation above market rate (or vice versa if below market)
• Family members on payroll at above-market compensation
• Owner’s personal expenses run through the business
• One-time legal or accounting expenses (M&A-related, lawsuits, restructuring)
• Non-recurring revenue or expense items (one-off projects, insurance proceeds)
• Rent normalization (if owner owns the building)
• Discontinued business lines

The goal of adjusted EBITDA is to estimate the ‘run-rate’ earnings power of the business under normal ongoing operations. Both buyer and seller agree on this calculation in diligence — it’s typically the single most-negotiated number in any deal.

EBITDA Multiples by Industry

Multiples vary widely by industry, business size, and quality. Some general ranges (mid-points for typical $1M–$5M EBITDA businesses in 2025):

• Environmental Services: 9x (range 5x–15x)
• Insurance Agencies: 10x (range 6x–13x)
• HVAC: 8x (range 4x–14x)
• MSPs / IT Services: 8x (range 4x–14x)
• Pest Control: 8x (range 4x–10x)
• Accounting Firms: 8x (range 4x–12x)
• Electrical / Plumbing: 6–7x (range 4x–10x)
• Landscaping / Roofing: 6x (range 4x–9x)
• Marketing Agencies: 6x (range 3x–12x)
• Commercial Cleaning: 5x (range 3x–8x)
• Trucking (asset-heavy): 4x (range 3x–5x)
• General Construction: 4x (range 3x–7x)

Within each industry, multiples scale with EBITDA size (larger businesses earn premium multiples), recurring revenue percentage, growth profile, customer concentration, and operational quality. See our individual industry pages for detailed breakdowns of what drives multiples within each category.

Common EBITDA Pitfalls

Overstating add-backs

The most common seller mistake. Aggressive add-backs (personal expenses that aren’t really personal, ‘one-time’ expenses that recur every year, owner comp normalization that doesn’t reflect what a market CEO would charge) get flagged in QofE diligence and almost always result in price reductions.

Confusing EBITDA with cash flow

EBITDA is not the same as cash flow. It excludes capital expenditures (real cash outflows for equipment, vehicles, technology) and working capital changes. For asset-heavy businesses, free cash flow can be significantly lower than EBITDA — which is why some buyers (especially for trucking, manufacturing) cross-check valuations against free cash flow multiples too.

Not having a Quality of Earnings done before going to market

For deals above ~$10M enterprise value, sellers increasingly commission their own (sell-side) QofE before going to market. This produces a defensible adjusted EBITDA number that’s much harder for buyers to push back on during diligence. Costs $25K–$60K typically; usually saves multiples of that in avoided price re-trades.