"How to Calculate SDE (Seller's Discretionary Earnings) Without an Accountant"

If you have spent any time researching the sale of your business, you have seen the term SDE. Seller's Discretionary Earnings is the single number that drives most small business valuations. Get it right and you negotiate from strength. Get it wrong and a buyer's accountant will reset the price for you during due diligence.

This article explains exactly what SDE is, how to calculate it yourself, which add-backs hold up and which ones buyers will fight, and how the number converts into a purchase price.

Why Buyers Price Off SDE Instead of Revenue or Net Income

Revenue does not tell a buyer how much they will earn. Net income from a tax return does not either. Owners of privately held businesses routinely reduce taxable income through legal means: paying themselves a salary, running personal vehicles through the company, taking health insurance as a business expense. That reduces reported profit without reducing actual cash the business generates.

SDE corrects for this. It measures the total financial benefit the business provides to a single full-time owner-operator. The International Business Brokers Association defines SDE as the earnings of a business prior to income taxes, depreciation, amortization, interest, non-operating income and expenses, nonrecurring income and expenses, and one owner's entire compensation including benefits and personal expenses paid by the business (IBBA Glossary of Terms).

According to BizBuySell's 2025 Year in Review, across 9,586 closed transactions, the median SDE was approximately $158,950 and the average cash flow multiple was 2.7x. Most main street businesses sell for 2x to 4x SDE.

The Calculation: Start From Net Income and Work Up

SDE is calculated by starting with net income from your tax return and adding back items that reduced it but that a new owner-operator would either capture as income or would not incur.

The formula:

SDE = Net Income + Owner Compensation + Personal Expenses Run Through the Business + Interest + Depreciation + Amortization + One-Time Non-Recurring Expenses

Each line is an "add-back." You are rebuilding the income statement to show what the business actually earns before the owner takes anything out.

Add-Backs a Buyer Will Accept Without Argument

These are standard and a competent buyer expects to see them:

Your salary and benefits. Your W-2 wages or owner's draw, payroll taxes the company paid on your behalf, and your retirement plan contributions all come back. The owner's salary is the most important add-back in every deal.

Owner health insurance. Health insurance premiums paid by the business for the owner (and often the owner's family) are added back, because a corporate buyer or a new owner-operator would either not incur this expense or would count it as personal compensation.

Personal vehicle. If the company pays for a vehicle you use personally, the lease payment, insurance, and other direct costs are legitimate add-backs, supported by the actual invoices.

Interest expense. The business's interest payments on loans get added back because the buyer will bring their own capital structure. Your debt is not their debt.

Depreciation and amortization. These are accounting entries, not cash leaving the business. They come back in every SDE calculation and buyers almost never contest them.

Genuinely one-time expenses. A legal settlement, a one-time piece of equipment repair that will not repeat, a relocation cost, a consultant hired for a specific project that is now complete. These are legitimate add-backs if they truly will not recur.

Above-market rent paid to a related party. If you own the building your business operates in and your company pays you rent above what the market rate would be, the excess over market rent is an add-back. You will need a market rent comparables analysis to support it.

Add-Backs Buyers Will Fight

These are the ones that get contested in due diligence. A buyer has direct financial incentive to disqualify every add-back they can, because each dollar they remove at a 3x multiple saves them three dollars on the purchase price.

Family members on payroll who do real work. You can add back a family member's salary only to the extent their role would not need to be replaced. If your spouse handles bookkeeping and a buyer would need to hire someone, that salary is an operating cost, not an add-back.

"One-time" expenses that appear every year. If the same category of expense shows up in three consecutive returns, a Quality of Earnings reviewer will remove it. The label one-time has to be accurate.

Aggressive personal expense claims. Meals, travel, and entertainment are contested without clear documentation. A country club membership with no documented business purpose is harder to defend than a vehicle lease registered in your name.

Two owners on payroll. Only one owner's salary can be added back. The second is either a real operating cost or requires explanation.

How to Document Add-Backs So They Survive Due Diligence

A legitimate add-back that you cannot prove might as well not exist.

For every add-back you plan to claim, gather the supporting document before you list:

• Owner salary: W-2s or payroll reports for the past three years
• Health insurance: The insurance invoice showing the company as the payor
• Personal vehicle: The lease or loan statement, plus a registration in your name
• One-time expenses: The invoice and a one-sentence explanation of why it will not recur
• Interest expense: Loan statements showing interest paid each year
• Above-market rent: A market rent comparables analysis from a commercial real estate professional

A buyer's accountant will match every add-back to a bank statement, invoice, or contract. Clean documentation survives. No paper trail means the add-back gets removed.

A Worked Example

Here is a hypothetical plumbing business to show how the numbers stack up.

Item	Amount
Net income (from tax return)	$185,000
Owner salary and payroll taxes	+ $95,000
Owner health insurance	+ $14,400
Personal vehicle (lease + insurance)	+ $12,000
Interest on business loan	+ $18,500
Depreciation and amortization	+ $32,000
One-time equipment repair (documented)	+ $11,000
SDE	$367,900

Net income was $185,000. SDE is $367,900. The gap is not inflated numbers; it is the cash the owner was taking out in forms that do not show up as profit.

At the market average of about 2.7x SDE for main street businesses, this company would be valued at roughly $993,000. At a stronger multiple of 3.2x for a well-documented business in a solid market, that climbs to about $1.18 million. The multiple is where negotiating room lives.

How the Multiple Gets Assigned

Multiples vary by industry, growth trend, customer concentration, and size. BizBuySell's 2025 data shows an average of 2.7x across all closed transactions. Businesses with SDE between $750,000 and $1 million commonly see 3.5x to 5x when a management team is in place (CT Acquisitions, 2026; Eightx, 2026).

Factors that raise the multiple: recurring revenue, transferable customer relationships, documented systems, a business that runs without the owner day to day.

Factors that lower it: heavy customer concentration (one customer above 20-25% of revenue), an owner who is irreplaceable, declining revenue, undocumented processes.

SDE vs. EBITDA: When the Switch Happens

Both metrics add back interest, depreciation, and amortization. The difference is owner compensation.

SDE adds back the owner's entire pay, on the assumption the buyer steps in and runs the business themselves. EBITDA leaves owner pay as a cost, assuming the company will hire a professional manager. Adjusted EBITDA adds back only the portion of owner pay above what a market-rate replacement manager would cost.

The crossover from SDE to EBITDA pricing happens in the range of $1 million to $2 million in earnings, but the real trigger is owner-dependence rather than a fixed dollar threshold (Eightx, 2026; CT Acquisitions, 2026). A business generating $1.5 million where the owner is genuinely indispensable may still be priced on SDE. A business at $900,000 that already operates with a general manager will often attract buyers thinking in EBITDA terms.

For most sellers in the $1 million to $5 million price range, SDE is the right number to build. Your broker will flag if your deal size or management structure shifts the conversation to EBITDA.

Before You Meet a Broker

You do not need an accountant for a first-pass SDE calculation. Pull your last three years of tax returns, identify each add-back category above, and build a simple spreadsheet. Three years matters because buyers want to see a trend, not just one good year.

For each add-back, ask: can I hand a document to a stranger and confirm this number in 30 seconds? If not, find the document now. Every unsupported add-back is one a buyer will challenge in diligence.

Arriving at a broker meeting with a clean, three-year SDE schedule puts you ahead of most sellers and signals to any buyer that your numbers will hold up under scrutiny.