What the business really pays its owner
A small business's tax return is written to minimize profit; a buyer wants to know what one working owner actually takes home. SDE bridges the two — net income plus the add-backs — and it is the number main-street businesses are priced on. Enter the lines and read it as you type.
The books, last twelve months
Add revenue for the SDE margin
Why the tax return understates the business
A well-run small business is managed to show as little taxable profit as legally possible: the owner takes a salary, the truck and the phone run through the books, equipment depreciates, the acquisition loan charges interest. None of that money is gone — most of it is going to the owner, one way or another — but the bottom line hides it. Seller's discretionary earnings reverses the disguise. It answers the question a buyer, a broker and an SBA lender all actually have: if one working owner ran this business, what would it pay them in total? That is the number main-street businesses are priced on.
How the number is built
Start with pre-tax net income — a loss is allowed, and the add-backs often turn it positive, which is precisely the point. Add back one working owner's full cost: salary, payroll taxes, benefits. Add interest, because the buyer arrives with their own financing; depreciation and amortization, because they are accounting entries rather than cash; genuinely one-time expenses, because the buyer will not repeat them; and the personal spending the business absorbed, because the buyer will not inherit it. The total is SDE, and the margin — SDE over revenue — is the fast health read: main-street service businesses commonly run 10–25%, and a margin far outside the industry's norm invites the diligence that finds out why.
Where SDE ends and EBITDA begins
SDE assumes the buyer is the manager; EBITDA assumes the buyer hires one. Add back a single owner's compensation and you have SDE; instead deduct a market salary for the general manager the business requires and you have adjusted EBITDA. The crossover matters because multiples are quoted per basis — SDE multiples for owner-operator businesses, EBITDA multiples once management stays with the company — and pricing one basis on the other's multiple misvalues the business by roughly the owner's pay times the multiple. If a second family member works unpaid or underpaid, the honest SDE charges their replacement cost before anything is added back.
Common mistakes
Add-backs fail diligence in predictable ways. "One-time" expenses that appear every year are operating costs wearing a costume. Two owners' salaries added back with no replacement cost for the second pair of hands overstates SDE by a full wage. Rent below market — usually because the seller owns the building — flatters earnings that a buyer paying real rent will never see; adjust to market rent, and value the building separately as the real estate it is. And every add-back needs paper: the buyer's accountant will rebuild this exact schedule from the general ledger, so a figure you cannot document is a figure the deal will lose. When the business and its premises are both yours, an honest schedule of each — the company here, the property on a Schedule of Real Estate Owned — is what keeps the two values from blurring into one optimistic number.
Once the SDE is honest, pricing it is one multiplication away — the business valuation calculator turns this page's answer into a value range at the multiples businesses like yours actually trade at.
Questions people ask
What is the difference between SDE and EBITDA?
What add-backs are legitimate in SDE?
Do lenders use SDE too?
Owner earnings, straight from the books
Prism computes this automatically for every asset you own — residential, commercial, or business. Every transaction lands in its category as it happens, so the earnings a buyer will ask about are a report, not a reconstruction.