When you're evaluating an ecommerce business for sale, you'll encounter the term SDE — Seller's Discretionary Earnings — in almost every listing. It's the single most important number in small business acquisitions, yet it's often misunderstood by first-time buyers.
This guide explains what SDE is, how it's calculated, how it differs from EBITDA and net profit, and why it's the metric that determines how much you'll pay for a business.
What Is SDE? The Simple Definition
SDE (Seller's Discretionary Earnings) is the total pre-tax earnings available to a single full-time owner-operator of a business — after removing all non-cash expenses and non-recurring costs, but before owner compensation.
In plain English: SDE represents the maximum economic benefit a working owner could extract from the business in a year.
The formula is:
SDE = Net Profit + Owner's Salary + Owner's Benefits + Add-backs
Where "add-backs" are expenses that were run through the business for the owner's personal benefit or are one-time in nature.
Why SDE (Not Revenue) Determines Price
Valuing a business on revenue is like buying a rental property based on the rent collected — without accounting for mortgage, maintenance, or property taxes. Revenue is an input. SDE is the output.
A $2,000,000 revenue Shopify store could be worth anywhere from $100,000 to $2,000,000+ depending on its SDE:
| Revenue | Net Margin | Annual SDE | Valuation Range (3x SDE) | |---|---|---|---| | $2,000,000 | 5% | $100,000 | ~$300,000 | | $2,000,000 | 15% | $300,000 | ~$900,000 | | $2,000,000 | 30% | $600,000 | ~$1,800,000 |
The multiple (typically 2x-4x for ecommerce businesses) is applied to SDE, not revenue. This is why SDE is the number that matters.
How SDE Is Calculated: Step by Step
Start with the business's federal tax return (Schedule C for sole proprietors, Form 1120S for S-corps), then work up from net profit:
Step 1: Start With Net Profit
This is the bottom-line profit from the tax return — after all expenses have been deducted, before income tax.
Step 2: Add Back Owner's Compensation
The seller's salary (or guaranteed payments if an LLC) comes back in. Why? Because after you buy the business, you'll be the owner. Your compensation will replace the seller's. If the seller paid themselves $80,000/year, add that back.
Note: If you plan to hire someone to run the business while you stay passive, that future manager's salary is a real expense — don't add it back in your valuation model.
Step 3: Add Back Non-Cash Expenses
Depreciation and amortization are accounting expenses, not actual cash out the door. Add them back to arrive at true cash earnings.
Step 4: Add Back Personal Expenses
Business owners often run personal expenses through the business — a car lease, phone bill, travel, meals. These are legitimate business deductions but aren't necessary for the business to operate. Add them back.
Common personal expense add-backs:
- Owner's health insurance
- Owner's vehicle (lease + insurance + fuel)
- Personal phone plan
- Personal travel and meals
- Owner's gym membership or subscriptions
Step 5: Add Back One-Time / Non-Recurring Expenses
Anything that won't recur under new ownership:
- Legal fees from a one-time dispute
- Website rebuild cost
- One-time equipment purchase
- Consultant fees for a special project
Step 6: Subtract Missing Expenses (Normalize Down)
This is where buyers need to push back. Some sellers forget to add in expenses that should be there:
- If the seller was doing all fulfillment personally and you'll hire someone, add a fulfillment manager's salary
- If the seller used personal software subscriptions, add the actual cost
- If the business is run from home and will need a warehouse, add the lease
A real SDE calculation looks like this:
Net Profit (from tax return): $45,000
+ Owner's salary: $72,000
+ Owner's health insurance: $8,400
+ Owner's vehicle (personal use): $9,600
+ Depreciation: $4,200
+ One-time legal fee: $6,800
- Estimated manager's salary (if needed): ($0)
= Adjusted SDE: $146,000
At a 3x multiple, this business would be valued at approximately $438,000.
SDE vs. EBITDA: What's the Difference?
Both metrics are used to value businesses, but they serve different buyer profiles.
| | SDE | EBITDA | |---|---|---| | Best for | Small businesses (<$5M revenue), owner-operators | Mid-market companies, PE acquisitions | | Owner salary | Added back | Not added back | | Reflects | Single owner's total economic benefit | Company profitability independent of owner | | Typical multiple range | 2x-5x | 4x-10x | | Used by | Individual buyers, SBA lenders | Private equity, strategic acquirers |
The key distinction: SDE adds back the owner's salary. EBITDA does not.
This is important because at the small business level, the owner's compensation is often the largest variable expense. A business with $500K EBITDA and a $150K owner salary has $650K SDE. These two numbers produce very different valuations.
For ecommerce businesses under $5M in revenue, SDE is the right metric. Brokers like Empire Flippers, Quiet Light, and our marketplace all use SDE as the primary valuation basis.
SDE vs. Net Profit
Net profit understates the business's true value because it includes the owner's salary as an expense. If a business nets $50,000 after paying the owner $90,000, it has $140,000 in true owner earnings.
Never evaluate a business on net profit alone. Always reconstruct SDE.
Why SBA Lenders Care About SDE
SBA lenders use SDE to calculate DSCR (Debt Service Coverage Ratio). This is the primary loan approval metric:
DSCR = SDE ÷ Annual Debt Service (loan payments)
Minimum DSCR for SBA approval: 1.25x
Example:
- SDE: $200,000
- Annual SBA loan payments: $115,000 (on $900K loan)
- DSCR: 200,000 ÷ 115,000 = 1.74x ✓ Approved
If SDE drops to $150,000 at the same loan amount:
- DSCR: 150,000 ÷ 115,000 = 1.30x ✓ Barely approved
If SDE drops to $120,000:
- DSCR: 120,000 ÷ 115,000 = 1.04x ✗ Declined
This is why SDE accuracy matters so much. An inflated SDE leads to a business price you can't finance, or worse, a loan that can't actually be serviced by the business's real cash flows.
Use our SBA affordability calculator to see exactly what SDE you need to support any acquisition loan.
Red Flags in Seller-Stated SDE
Sellers naturally present their businesses in the best light. Watch for:
Aggressive Owner Add-Backs
If a seller is adding back $80,000 in "personal expenses" for a business generating $120,000 in net profit, something is off. Get documentation for every add-back.
Add-Backs That Don't Normalize
A seller adds back $40,000 in "one-time" expenses that happened the last two years in a row. That's not one-time — that's a recurring cost.
Revenue vs. SDE Mismatch
High revenue with very low SDE often signals a commoditized business with thin margins or hidden costs. Dig into COGS, fulfillment, and platform fees.
Inconsistency Between Tax Return and P&L
The P&L says $250,000 SDE. The tax return says $80,000 net profit. The difference is hard to explain with add-backs. This gap should make you very uncomfortable. Request a CPA-prepared financial reconciliation.
Future SDE Projections as Current Value
Some sellers present projected SDE ("We're growing 40% MoM, so next year will be $400K SDE") as the basis for current valuation. Value on trailing 12-month SDE (T12) or trailing 24-month average (T24), not projections.
How to Use SDE When Evaluating Listings
Step 1: Get the raw financial data — tax returns and bank statements, not just the broker's P&L.
Step 2: Reconstruct SDE yourself from the tax return, adding back documented add-backs only.
Step 3: Compare your SDE to the broker's stated SDE. If they differ by more than 10-15%, understand why.
Step 4: Apply the appropriate multiple for the business's risk profile (2x-4x for most ecommerce businesses).
Step 5: Use our business valuation tool to stress-test different multiple scenarios and see how price changes with SDE assumptions.
Frequently Asked Questions
What does SDE stand for in business?
SDE stands for Seller's Discretionary Earnings. It represents the total annual earnings available to a single owner-operator of a small business — net profit plus owner compensation plus non-cash and one-time expenses.
Is SDE the same as cash flow?
SDE is close to owner cash flow but not identical. Cash flow accounting also factors in changes in working capital, capital expenditures, and debt service. SDE is a simplified proxy for cash available to a working owner before any debt service or investment spending.
How is SDE different from EBITDA?
The key difference is owner's salary. SDE adds back the owner's compensation; EBITDA does not. For owner-operated small businesses, SDE is the right metric. For mid-market companies managed by hired executives, EBITDA is more appropriate.
What multiple of SDE should I pay for an ecommerce business?
Most ecommerce businesses sell for 2x-4x SDE. Premium businesses (strong repeat revenue, diversified traffic, proprietary products) command 3.5x-5x. Businesses with concentration risk or declining trends sell at 2x-2.5x. A 3x multiple is a reasonable starting point for most standard Shopify and Amazon FBA businesses.
Can I use SDE to calculate my SBA loan eligibility?
Yes — SBA lenders use SDE to calculate your Debt Service Coverage Ratio (DSCR). You need a minimum 1.25x DSCR for approval, meaning your SDE must be at least 25% higher than your annual loan payments. Use our SBA affordability calculator to run this calculation for any deal.
Understanding SDE is the foundation of smart ecommerce acquisition. Before you make an offer on any business, rebuild SDE from scratch using the seller's tax returns. What you find in that reconstruction will tell you everything you need to know about whether the asking price is fair. Ready to find a business to evaluate? Browse verified listings with transparent SDE documentation.