SDE: The Valuation Metric That Drives Small Business Prices
Seller's Discretionary Earnings (SDE) is the total economic benefit an owner-operator receives from a business in a given year. It's the primary valuation metric for small business acquisitions — the number that gets multiplied by an industry multiple to produce the asking price.
If a business sells for "3× SDE" and SDE is $200,000, the purchase price is $600,000. Understanding SDE — and verifying it — is the most important financial skill in small business acquisitions.
The SDE Formula
SDE = Net Income + Owner Salary & Benefits + Depreciation & Amortization + Non-Recurring Expenses + Personal Expenses Run Through the Business
This is the output of the financial recasting process. Each line represents a category of add-back.
SDE vs. EBITDA
The critical difference: SDE adds back the owner's entire compensation (salary + benefits + any other personal economic benefit), treating the business as if one person captures all the economic value. EBITDA, by contrast, subtracts a market-rate management salary — it assumes a hired professional runs the business.
This matters because SDE is the right metric when the buyer plans to work in the business as an owner-operator (capturing all earnings). EBITDA is right when the buyer plans to hire a manager (one layer of earnings goes to that manager's salary before the buyer sees returns).
| Metric | Who it's for | Typical multiple |
|---|---|---|
| SDE | Owner-operators; businesses under ~$2M earnings | 2× – 4.5× |
| EBITDA | Platform acquisitions; PE; management-run businesses | 4× – 10×+ |
What a Good SDE Number Looks Like
SDE multiples are driven by business quality, not just industry. Within any sector, businesses at the high end of the multiple range typically have:
- Multiple years of stable or growing SDE (not a single good year)
- Diversified customer base (no customer concentration)
- Documented processes and a team that runs without the owner daily
- Transferable contracts and relationships (low key man risk)
- Clean, auditable financials that reconcile to tax returns
Trailing 12 Months vs. Average
SDE is usually calculated based on the trailing 12 months (TTM) — the most recent year of operation. For businesses with recent growth, sellers prefer TTM (higher). For businesses with a recent dip, sellers may push for a 3-year average (smoother). Buyers should understand which basis is being used and model both. For cyclical businesses, a 3-year average is more reliable; for businesses with clear and sustainable revenue growth, TTM may be appropriate.
Common SDE Mistakes
- Adding back recurring expenses as "one-time" — marketing spend, equipment maintenance, and professional fees that recur annually aren't add-backs
- Adding back a replacement role — if the owner does sales and a new owner would need to hire a salesperson, that salary can't be fully added back
- Not verifying against bank statements — SDE built from P&L alone can be inflated; deposits don't lie
Deal-Model Context
SDE is the core earnings metric for many owner-operated small businesses because it shows the cash flow available to one working owner before the buyer decides how to pay themselves. It is powerful, but it is also easy to inflate.
In the model, calculate SDE only after reviewing net income, owner compensation, add-backs, non-recurring costs, and replacement labor. If the buyer will not personally operate the business, a market manager salary should usually be deducted before valuation.
Buyer Diligence Questions
A strong SDE file reconciles to tax returns and bank activity. It also separates normal business expenses from true owner discretion. If the seller's SDE depends on vague personal expenses or recurring one-time costs, use a lower base case.
This term connects to add-backs, recasting, EBITDA, valuation multiples, and SBA underwriting. Ask which add-backs are documented, which owner roles must be replaced, and whether the same SDE supports debt service after closing.
Related Terms
- Add-backs — the individual adjustments that build up SDE
- Recasting financial statements — the process that produces SDE
- Enterprise value — how SDE multiples relate to total deal value
Sources & Further Reading
- IBBA Market Pulse — quarterly data on SDE multiples by industry and deal size
- BizBuySell Insight Report — transaction data on how SDE translates to purchase price in real deals