What Is SDE? The Complete Guide to Seller's Discretionary Earnings

If you are planning to sell an online business — whether it's an ecommerce store, digital agency, content site, or even a SaaS product — there is one number that will define your entire exit: Seller's Discretionary Earnings (SDE).

Every acquisition broker, marketplace platform, and private buyer uses SDE as the foundation for calculating how much your business is worth. Yet the majority of founders who approach a sale process have never formally calculated it. This guide walks you through exactly what SDE is, how to calculate it with real examples, and how to optimise it before you approach the market.

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What Is Seller's Discretionary Earnings (SDE)?

Seller's Discretionary Earnings is a measure of the total financial benefit that a business provides to a single owner-operator over a twelve-month period. It represents how much cash a working owner could realistically extract from the business annually, assuming they are the sole decision-maker managing day-to-day operations.

The formula is straightforward:

SDE = Net Profit + Owner's Salary + Owner's Personal Benefits + One-Time or Non-Recurring Expenses

Unlike institutional financial metrics like EBITDA (Earnings Before Interest, Taxes, Depreciation, and Amortisation), SDE is specifically designed for small to mid-sized businesses where the owner is actively involved. It is the default valuation metric for businesses generating under approximately $5 million in annual revenue.

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The SDE Formula: Line by Line

1. Net Profit (After Tax)

Start with your business's net profit, as reported on your profit and loss (P&L) statement. This is your top-line revenue minus all operating costs, including COGS (cost of goods sold), marketing, software subscriptions, contractor payments, and any other legitimate business expenses.

2. Add Back Owner's Salary

When calculating SDE, you add back the owner's compensation. The reason is straightforward: the buyer will replace the current owner, so the salary paid to the current owner is not a real operational expense — it is a distribution of profit.

Example: If your business generates $80,000 in net profit after paying yourself a $60,000 annual salary, your pre-add-back SDE base is $80,000. After adding the salary back, your SDE becomes $140,000.

3. Add Back Owner-Specific Perks and Benefits

Many owner-operated businesses run personal or semi-personal expenses through the business. Common examples include:

• Health insurance premiums paid by the business
• A company vehicle used partly for personal trips
• Home office rent or utilities claimed as business expenses
• Mobile phone bills
• Travel expenses that combine personal and business purposes

These add-backs must be disclosed accurately during due diligence. Buyers verify every line item. Overstating add-backs is one of the most common reasons deals collapse during escrow.

4. Add Back One-Time or Non-Recurring Expenses

Any extraordinary expenses that will not repeat under a new owner can be added back. Examples include:

• Legal fees from a one-time dispute
• Cost of a website redesign or rebrand
• Equipment purchases that have a multi-year useful life

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Worked Example: Calculating SDE for an Ecommerce Store

SDE Calculation:

• Net Profit: $240,000
• Add Back Owner's Salary: +$96,000
• Add Back Owner's Health Insurance (claimed through business): +$8,400
• Add Back One-Time Legal Fee: +$6,000

Total SDE: $350,400

At a 3.0x SDE multiple (typical for a profitable ecommerce brand), this business would be valued at approximately $1,051,200.

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SDE vs. EBITDA: Which One Applies to Your Business?

The distinction between SDE and EBITDA is critical and frequently misunderstood.

SDE is used for owner-operated businesses where a single person fulfils multiple roles — CEO, marketing lead, customer support, and operations. The owner's labour is a core input, and buyers need to understand the total economic benefit they would receive by owning and running the business themselves.

EBITDA is used for businesses with professional management teams that are independent of the owner. At this scale (typically $5M+ in revenue), the owner has been replaced by hired executives, making their salary a genuine operating cost rather than a profit distribution.

Attempting to use EBITDA for a business that genuinely requires the owner's daily involvement leads to overvaluation and deal failure.

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How to Increase Your SDE Before a Sale

1. Clean Up the P&L Now

Start producing clean, GAAP-consistent profit and loss statements at least 12 months before you want to go to market. Buyers will request a trailing 12-month P&L and a trailing 3-year historical view. Inconsistencies or missing documentation raise red flags.

2. Transition Personal Expenses Out of the Business

If you have been running personal expenses through the business, stop doing so 12 months before a sale. Add-backs are legitimate, but a clean P&L with minimal add-backs is infinitely more credible during diligence and commands higher confidence from buyers.

3. Document Every Add-Back with Evidence

For every add-back you plan to include in your SDE calculation, maintain documentary evidence: bank statements, invoices, receipts. Brokers call this the "add-back schedule" — it is submitted as part of the initial deal package.

4. Reduce Discretionary Spending

Evaluate every non-essential expense line. Any recurring cost that you can eliminate permanently (not just temporally) directly increases your SDE. Reducing annual software subscriptions from $24,000 to $12,000 adds $12,000 to SDE, which at a 3.0x multiple translates to $36,000 more in your exit cheque.

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SDE Multiple: What Is Your Business Worth?

SDE alone does not determine your sale price. The final value is calculated by multiplying your SDE by a market-determined multiple.

Typical SDE Multiples by Business Type (2026 Market):

The multiple you achieve depends on qualitative factors: business age, revenue diversification, growth trajectory, owner dependency, and buyer competition.

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Common SDE Mistakes That Kill Deals

Mistake 1: Including Lifetime Deal Revenue in SDE

If you ran a lifetime deal campaign (e.g., through AppSumo), that revenue is non-recurring and must be excluded from your SDE calculation. Buyers adjust for this automatically — but if you present it as recurring, you will be caught during diligence.

Mistake 2: Overstating Add-Backs

Every add-back must be verifiable. If you claim $30,000 in personal travel add-backs but your bank statements show only $8,000, your credibility collapses. Buyers use this to justify re-trading the entire deal price.

Mistake 3: Calculating SDE on a Single Year

Buyers want to see trend analysis, not a single snapshot. Present SDE for years one, two, and three. A growing SDE trend is far more valuable than a flat or declining one, even if the current year is strong.

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Frequently Asked Questions About SDE

Does SDE include depreciation?

No. SDE is calculated before depreciation and amortisation. These non-cash accounting adjustments are stripped out because they do not represent real cash that the owner could spend.

What if the business has no owner salary (the owner takes distributions only)?

If the owner takes distributions or dividends rather than a formal salary, the add-back principle still applies. Document the total amount extracted from the business as owner compensation and include it in the SDE calculation.

How many months of data do buyers use for SDE?

Most buyers and brokers calculate SDE using the trailing 12 months (LTM) as the primary benchmark, with the trailing 3 years provided for trend context. Some buyers apply a weighted average, giving more weight to more recent performance.

Can I calculate SDE myself or do I need an accountant?

You can calculate a preliminary SDE figure yourself using your P&L statements and the formula above. However, for a formal listing and brokered sale, work with a certified accountant or M&A advisor to prepare a verified add-back schedule that will hold up under buyer scrutiny.