SDE vs EBITDA: Which One Is a Small Business Actually Valued On?

What is the difference between SDE and EBITDA?

One line: the owner's pay. SDE includes it, EBITDA does not.

Seller's discretionary earnings measures what a single working owner can extract from a business — net profit plus that owner's salary, payroll taxes, personal benefits run through the company, interest, depreciation and amortisation, and genuine one-time items. It answers the question a self-employed buyer is asking: what will this business pay me to run it?

EBITDA measures what the business earns as an asset, independent of who owns it. It deducts market-rate compensation for whoever performs the owner's function, because an investor who does not intend to work in the business must hire someone who will.

Both are legitimate. They answer different questions, and the answers differ by roughly one salary.

Why is SDE always higher than EBITDA?

Because the owner's compensation sits inside one and outside the other, and on a small business that line is frequently the largest adjustment in the calculation.

The scale of the effect is visible in IRS Statistics of Income data. Sole proprietors in construction — where the owner takes no formal salary, so reported profit is closer to SDE — report a net margin of 14.8%. C-corporations in the same sector, where the owner has been paid before profit is struck, report 5.3%.

Same trade. Same work. The margin nearly triples depending on which side of the owner's paycheque the number is measured.

That comparison is imperfect: sole proprietorships skew smaller and C-corporations skew toward chains, so the two bracket reality rather than isolating the effect. But the direction and rough magnitude hold, and they explain why a business can appear to earn $310,000 or $120,000 depending entirely on the definition in the header of the spreadsheet.

Which one should a small business be valued on?

Convention follows who will operate the business after close.

The boundary is a convention rather than a rule, and businesses near it are frequently quoted both ways — which is where the confusion, and occasionally the manipulation, enters.

Can you apply an EBITDA multiple to SDE?

No, and doing so is one of the most expensive errors in small-business valuation.

Multiples are empirical. They are derived from observed transactions using a specific earnings definition, and they only mean anything when applied to that same definition. Applying a multiple derived from EBITDA transactions to an SDE figure overstates value by approximately the multiple times the owner's compensation.

On a business with $300,000 of SDE including a $90,000 owner salary, valued at a 4x multiple drawn from EBITDA comparables, the error is roughly $360,000 — larger than the entire annual earnings of the business.

The check is mechanical: confirm what the comparable set measured before applying anything derived from it.

What do SBA lenders use?

Lenders underwrite to cash available for debt service after a reasonable owner's salary, which sits closer to EBITDA than to SDE.

This is the practical consequence that catches buyers. A business listed at $300,000 SDE will not support debt sized against $300,000. The lender deducts a living wage for the operator first, then applies a debt service coverage ratio to what remains. The financeable number is materially lower than the headline.

The gap between the two is a frequent cause of deals that appear to work on a listing and fail in underwriting.

How do add-backs interact with the two definitions?

Add-backs behave differently under each, and the distinction is where most disputes originate.

Under SDE, one working owner's compensation and genuine personal expenses are legitimate add-backs, because they represent discretion a new owner inherits. Under EBITDA, they are not — the function still has to be performed and paid for.

Items that are add-backs under both definitions are narrower than most listings suggest: genuinely non-recurring legal costs, one-time relocation, a single equipment failure. Items that are add-backs under neither include ordinary owner benefits presented as personal, and recurring costs described as exceptional. A closer treatment of which survive scrutiny is set out in what SBA lenders actually accept, and the pattern-level test in what add-backs are.

A second owner's salary is the most frequently contested item. Where two owners work in the business, only one salary is a legitimate SDE add-back. The second is a real cost of operation.

What does this mean in practice?

Three checks resolve most confusion between the two figures.

Establish the definition before the number. Ask explicitly whether owner compensation is included, and whether more than one owner works in the business. The answer changes the figure more than any add-back dispute will.

Match the multiple to the definition. A multiple is only meaningful against the earnings basis it was derived from. Cross-applying is a valuation error, not a negotiating position.

Underwrite to the financeable number, not the listed one. For an owner-operated acquisition, the number that determines whether the deal closes is what remains after a market salary and debt service — not the headline on the listing. Related reading: how to calculate SDE and when a 3x multiple is expensive.

Sources and method

Margin comparison from IRS Statistics of Income, sole proprietorship and corporation business data. Sole-proprietor figures reflect Schedule C filers, who skew toward smaller owner-operated businesses and take no formal salary; corporate figures reflect entities that deduct owner compensation before profit. The two populations differ in composition and are presented as bracketing the effect of compensation treatment rather than as a controlled comparison. Deal-size conventions describe observed market practice and are not a rule.

This article is general information, not financial, legal, tax, or investment advice. Figures vary by deal, lender, and jurisdiction. Consult a qualified CPA, transaction advisor, or attorney before relying on any analysis.