What Is SDE and Why It Matters for Selling Your Business
If you're planning to sell your business, you've probably heard the term Seller's Discretionary Earnings (SDE) thrown around. But what does it actually mean, and why do buyers care so much about it?
SDE is essentially the profit available to an owner who buys your business. It's calculated by taking your net income and adding back owner-related expenses that a new owner wouldn't necessarily incur. Think of it as the true earning power of your business—stripped of the personal expenses that happen to run through it.
Most small businesses are valued using an SDE multiple. A buyer might offer 3x to 5x your SDE, depending on industry, growth, and risk. Get your SDE calculation wrong, and you could leave serious money on the table—or price yourself out of the market entirely.
The SDE Formula: Start With Net Income
The calculation is straightforward:
SDE = Net Income + Owner Add-Backs
Your starting point is your net income (also called net profit or bottom-line earnings). This is what you see on your tax return or financial statements. Then you add back expenses that are specific to you as the current owner—things a new owner wouldn't pay or would pay differently.
Let's say your business had a net income of $150,000 last year. That's your baseline. From there, you'll identify and add back any owner-specific costs.
Common SDE Add-Backs (And How to Identify Them)
Not every expense is an add-back. The key question is: Would a new owner have to pay this? If the answer is no, or "not at this level," it's likely an add-back.
Owner Salary and Bonuses
This is the most common add-back. If you pay yourself a salary, add it back. A new owner will pay themselves a market-rate salary for the role they fill—which might be different from what you pay yourself. Some owners pay themselves $30,000 a year; others pay $150,000 for the same business. That difference matters.
Owner Benefits
Health insurance, retirement contributions, life insurance, car allowances, gym memberships—if it's a personal benefit you receive as the owner, add it back. A new owner will have their own benefits package.
Discretionary Spending
Meals and entertainment, travel, professional dues, subscriptions—anything that's genuinely discretionary and not essential to running the business. Be honest here. If you took a $5,000 vacation and expensed it as a "business trip," it's an add-back. But if you attended a mandatory industry conference, it probably isn't.
Family Members on Payroll
If your spouse or kids work in the business but are overpaid relative to their actual contribution, the excess is an add-back. A new owner won't pay family rates.
One-Time or Non-Recurring Expenses
Lawsuit settlements, one-time equipment repairs, moving costs, severance for a departed employee—these don't reflect ongoing operations. Add them back.
Related-Party Expenses
Rent paid to a property you own, consulting fees to your brother-in-law, insurance commissions to your friend—if the business is paying more than market rate to someone you know, the excess is an add-back.
Depreciation and Amortization
These are non-cash charges. If your business has $20,000 in annual depreciation, add it back. A new owner will have their own depreciation schedule based on assets they acquire.
Interest Expense
If you have a business loan, the interest is an add-back. A new owner may refinance or pay with different capital, so this expense shouldn't reduce the SDE.
Excess Owner Expenses
Sometimes you spend more on something than necessary. If you use a premium vendor when a standard one would work, the difference might be an add-back. This requires judgment—and honesty.
Step-by-Step SDE Calculation Example
Let's walk through a real example. Say you own a digital marketing agency with the following financials:
- Net Income: $180,000
- Your owner salary: $80,000
- Health insurance (you): $12,000
- Car allowance: $8,000
- Meals and entertainment: $6,000
- Professional development (discretionary): $4,000
- Depreciation on equipment: $5,000
- Interest on business loan: $15,000
SDE Calculation:
- Net Income: $180,000
- + Owner salary: $80,000
- + Health insurance: $12,000
- + Car allowance: $8,000
- + Meals/entertainment: $6,000
- + Professional development: $4,000
- + Depreciation: $5,000
- + Interest expense: $15,000
- = SDE: $310,000
Your SDE is $310,000—nearly double your reported net income. If the market multiple for your industry is 4x SDE, your business might be valued at $1.24 million.
Common Mistakes When Calculating SDE
Even experienced business owners slip up here. Watch out for these:
Adding back too much. Buyers and brokers scrutinize add-backs. If you add back an expense that clearly benefits the business, you'll lose credibility. Stick to legitimate owner-specific costs.
Forgetting to document. A buyer will ask for proof. Keep receipts, credit card statements, and explanations. If you can't show it, you can't claim it.
Using inconsistent years. If you're adding back $20,000 in owner bonuses but only took a bonus once in five years, that's a red flag. Use normalized or average figures when appropriate, but be transparent about it.
Ignoring tax implications. Some add-backs are tax-deductible; others aren't. Work with your CPA to make sure your SDE aligns with your actual tax filings. Discrepancies kill deals.
Not adjusting for growth or decline. If your business is trending downward, a buyer may discount the SDE. If it's growing, they might apply a premium. SDE is a snapshot, not a guarantee.
Who Validates Your SDE?
In a professional sale, a broker or M&A advisor validates your SDE. In a DIY sale, the buyer will do it—and they'll be skeptical. That's why documentation and honesty matter.
Tools like ExitKit help you organize and present your SDE calculation in a way that buyers expect. The SDE workbook walks you through the add-backs systematically, pulling from your actual financials, so there's a clear audit trail. When you're selling without a broker, that credibility is essential.
Normalizing SDE: When One Year Isn't Enough
Sometimes a single year's SDE doesn't tell the whole story. If your business had an unusually good or bad year, buyers often ask for a normalized SDE—an average or adjusted figure that reflects typical performance.
For example, if your business earned $200,000 SDE last year but $150,000 the year before, a buyer might use $175,000 as the normalized figure. Or if you had a one-time client that inflated revenue, you'd back that out.
Calculate SDE for the past 2–3 years if you have them. This gives buyers confidence that your earnings are sustainable.
SDE vs. EBITDA: What's the Difference?
You might also hear EBITDA (Earnings Before Interest, Taxes, Depreciation, and Amortization). For larger companies, EBITDA is the standard. For small businesses, SDE is more common because it accounts for owner-specific expenses.
The short version: SDE is for small businesses; EBITDA is for larger ones. Stick with SDE unless your buyer specifically asks for EBITDA.
Getting Your SDE Right: The Checklist
- Pull your financials. Gather tax returns, P&L statements, and bank statements for the past 2–3 years.
- List all owner-related expenses. Go through your P&L line by line. Flag anything that's personal to you.
- Verify with your CPA. Make sure your add-backs align with your tax filings. No surprises.
- Document everything. Keep receipts, explanations, and supporting evidence for every add-back.
- Calculate normalized SDE. If you have multiple years, average them or explain unusual items.
- Be conservative. It's better to understate SDE than to add back expenses a buyer will challenge.
- Prepare to defend it. A buyer will ask questions. Have answers ready.
What Comes After SDE?
Once you've calculated your SDE accurately, you're ready to value your business using industry multiples. From there, you can price your listing, create a confidential information memorandum, and attract serious buyers.
Getting SDE right is the foundation of a successful exit. Spend the time to do it properly—it'll pay off when you're negotiating with a buyer.
