If you’re selling a small, owner-operated business, the most important number in the conversation is usually seller’s discretionary earnings — SDE. If you’re buying one, it’s the number you most need to verify.
What SDE measures
SDE is the total annual financial benefit the business provides to one full-time owner-operator before taxes, interest and non-cash expenses. It answers: “If I owned and ran this business, what would it produce for me each year?”
How it’s calculated
Start with pre-tax net profit from the tax return or profit-and-loss statement, then add back:
- One owner’s compensation — salary, payroll taxes and benefits for one working owner.
- Interest expense — because the buyer’s financing will be different.
- Depreciation and amortization — non-cash expenses (though buyers still think about real equipment needs).
- Personal expenses run through the business — documented personal vehicle, phone, travel or insurance.
- True one-time expenses — a lawsuit, a one-time move, a non-recurring repair.
The total is SDE.
A worked example, in words
Imagine a small residential service company. The tax return shows a modest profit. The owner pays themselves a salary, runs a family vehicle and phone through the business, paid a one-time legal bill last year, and has depreciation on two trucks. Adding back the owner’s salary and benefits, the documented personal vehicle and phone, the one-time legal bill, interest on the truck loans and depreciation gives SDE — a number noticeably higher than the profit line, and the starting point for valuation.
Now a buyer asks the hard questions: Are the trucks going to need replacing soon? Was the legal bill really one-time? Does the owner’s spouse work unpaid in the office? If so, someone will need to be paid to do that work — and that reduces SDE.
Legitimate vs aggressive add-backs
| Usually legitimate | Often challenged |
|---|---|
| One owner’s salary and benefits | A second family member’s salary when they actually work in the business |
| Documented personal vehicle, phone, travel | “Personal” expenses with no documentation |
| A genuine one-time lawsuit or repair | Repairs that happen every year |
| Interest and depreciation | Ignoring equipment that will soon need replacing |
| Owner’s above-market rent to themselves (adjusted to market) | “Cash revenue not on the books” |
That last one deserves its own warning: unreported cash income isn’t an add-back. Buyers, lenders and the IRS can’t count income that isn’t reported, and claiming it raises legal and ethical problems for everyone.
How buyers and lenders test SDE
- Tie to tax returns. The starting profit should match filed returns.
- Tie to bank deposits. Revenue should match money that actually came in.
- Request support for each add-back — receipts, statements, explanations.
- Look for hidden labor. Unpaid family help, an owner who does two jobs.
- Check trends. Is SDE consistent, rising or falling over several years?
- Quality of earnings review on larger deals — required for some SBA acquisitions under current rules.
SDE vs EBITDA
SDE adds back one owner’s full compensation. EBITDA assumes the business pays a manager to run it, so it doesn’t. That’s why larger businesses with management in place are usually valued on adjusted EBITDA. See EBITDA for small business.
If you’re selling: build a clean SDE package
- Three to five years of tax returns and profit-and-loss statements.
- An add-back schedule with documentation for each item.
- A short explanation of any unusual year.
- A list of what the owner does each week (so buyers can price replacing it).
A clean package makes buyers more confident — and confidence shows up in price and terms. See how to prepare a business for sale.
If you’re buying: never accept SDE on faith
Rebuild it yourself from the source documents. Remove anything you can’t verify. Add costs you’ll actually have — a manager, market rent, equipment replacement. Then value the business on the number you believe, not the one in the brochure.
Why SDE matters to lenders
Lenders start from similar math, then subtract the payments the new owner will owe and a reasonable salary for the buyer to live on. If the remaining cash can’t comfortably cover the debt, the deal won’t be financed as proposed — no matter how strong the SDE looks on paper. That’s why clean, defensible SDE helps sellers twice: it supports the price and it helps the buyer get the loan to pay it.
Next steps
For the full valuation picture, see how to value a small business. If you’re a South Carolina owner who’d like a buyer’s honest read on your SDE, start a confidential conversation.
Put the effort in early, and SDE becomes your strongest selling tool instead of your biggest argument.
Questions people ask
How do you calculate seller's discretionary earnings?
Start with pre-tax net profit, then add back one owner’s salary and benefits, interest, depreciation and amortization, documented personal expenses run through the business, and true one-time expenses. The result is the total annual benefit to a single owner-operator.
What are add-backs?
Expenses on the books that a new owner wouldn’t incur — such as the owner’s personal vehicle or travel, one-time legal costs, or non-recurring repairs. Legitimate add-backs are documented and genuinely non-recurring or personal.
What is the difference between SDE and EBITDA?
SDE adds back one owner’s full compensation; EBITDA does not, because it assumes the business pays a manager market wages. SDE is typically used for smaller owner-operated businesses, EBITDA for larger businesses with management in place.