How to Calculate SDE Add-Backs (The IBBA Method, Line by Line)

What SDE is for

Seller’s Discretionary Earnings is the earnings figure buyers, brokers, and SBA lenders actually price a Main Street business on — not the profit line on your tax return. A tax return is optimized to minimize taxable income; SDE reverses that, adding back the expenses that only exist because of how you ran the business, so a buyer can see what it would put in their pocket instead.

The definition comes from the International Business Brokers Association’s glossary: pre-tax net profit, plus one owner’s entire compensation, interest, depreciation and amortization, non-operating and non-recurring items, and personal expenses the business paid. Every add-back below traces back to one of those terms — nothing on this list is a rule of thumb.

The five categories

1. Owner compensation & benefits

Everything one full-time owner-operator takes out of the business: salary or draws, the payroll taxes paid on that salary, and health insurance or retirement contributions made on the owner’s behalf. This is usually the largest add-back, because it’s the whole point of SDE — showing what the business pays its operator, not just its accounting profit.

2. Financing & non-cash expenses

Interest expense, depreciation, and amortization are added back because a buyer brings their own financing and their own asset basis — how you financed equipment or structured debt doesn’t transfer to them. These add-backs are usually the most defensible: they're line items straight off the tax return or P&L, with no judgment call attached.

3. Personal expenses run through the business

Real spending, but spending a buyer wouldn’t have to make: a personal vehicle, family phone plans, travel that wasn’t business. This is also the category buyers and lenders scrutinize hardest, because it’s the easiest to overstate.

4. One-time items

Costs — and income — that genuinely won’t repeat: a lawsuit settlement, a flood repair, a one-off equipment move. Note the direction on income: a grant, an insurance payout, or a one-off asset sale gets subtracted, not added, because a buyer can’t count on it recurring either.

5. Normalization adjustments

Restating costs to what a buyer would actually face, in whichever direction that cuts. Paying above-market rent to a related landlord adds back the excess; owning the building and charging yourself below market subtracts the shortfall, because a buyer without your building will pay full market rent. The same logic applies to family wages paid above or below market.

The one-owner rule

Only one full-time owner-operator’s compensation gets added back in full. If a second owner also works in the business, their compensation is added back too — but what it would cost to hire a replacement for their role gets subtracted in the same step. This single rule is the one most first-time worksheets get wrong, usually by adding back every owner’s full pay and inflating SDE.

A worksheet that only ever adds numbers up is a sales pitch, not a valuation input. Normalization running in both directions — add-backs and deductions — is what separates a defensible SDE figure from an inflated one.

The provability test

Every add-back should trace to something a buyer or lender can actually check: a tax return line, a payroll record, a receipt. In diligence, an add-back you can only assert — “trust me, that was personal” — typically gets discounted or thrown out entirely. Build your worksheet as if someone else’s lender will read it, because eventually one will.

Work through your own numbers, category by category, in the SDE Calculator & Add-Back Worksheet — it follows this exact structure and prints a clean breakdown you can hand to a broker or lender.

This guide is for informational purposes only. It is not financial, legal, or business-brokerage advice, and it is not a formal valuation or appraisal. What a business actually sells for is set by a specific buyer, a specific lender, and a specific deal — no article or calculator can know that in advance, and we say so instead of pretending otherwise.

Last reviewed: July 2026 · Against the IBBA glossary's SDE definition.