SDE Calculator: Seller's Discretionary Earnings

The Accounting Mechanics of SDE (Seller's Discretionary Earnings)

In the mergers and acquisitions (M&A) space, particularly for businesses valued under $5 million, Seller’s Discretionary Earnings (SDE) is the foundational financial metric used to calculate valuation.

Unlike larger corporations that are valued on EBITDA (which assumes a professional management team is running the company), smaller online businesses are usually owner-operated. SDE calculates the true, complete financial benefit that a single owner-operator derives from running the business. This gives potential buyers a clear view of the cash flow they would inherit if they acquired the business and stepped into the operator's shoes. In this guide, we explore the exact formulas, add-back categories, and multiple drivers for SDE-based valuations.

1. SDE vs. EBITDA: What is the Difference?

Understanding the distinction between SDE and EBITDA is critical for positioning your business during a sale:

• SDE (Seller's Discretionary Earnings): Adds the owner's salary, health insurance, and personal perks back into the earnings. SDE represents the total cash flow available to a single active owner-operator.
• EBITDA (Earnings Before Interest, Taxes, Depreciation, and Amortization): Treats the owner's salary as a true operating expense (since a professional manager would need to be hired to replace them). EBITDA measures the earnings of the business itself, independent of the owner's compensation.

As a general rule, businesses generating under $1M in SDE are valued on an SDE basis. Once SDE exceeds $1.5M to $2M, buyers (especially private equity firms) transition to EBITDA-based valuations because the organizational complexity requires a professional management structure.

2. The Add-Back Schedule: Maximizing Your SDE

To calculate SDE, you start with your net profit from your tax returns or profit and loss (P&L) statement, then apply "add-backs" to adjust the earnings to their true discretionary power. Add-backs are expenses that a new owner would not necessarily incur or personal benefits you run through the business. Common add-back categories include:

Owner Compensation

This is the most common add-back. If you pay yourself a salary of $100,000, that is added back. If there are multiple active owners, buyers will only allow you to add back the salary of one owner-operator. The salary of any other active partners must be adjusted to market rates for their roles.

Depreciation & Amortization

These are non-cash accounting expenses that reduce your taxable income but do not affect your actual bank account balance. They are added back to reflect true cash flow.

Non-Recurring, One-Time Expenses

Expenses that occurred once and will not repeat post-acquisition are added back. Examples include:

• Legal fees for registering a trademark or settling a dispute.
• One-time consulting or custom software development fees.
• Redesign fees for your website or logo.
• Moving expenses for inventory relocation.

Discretionary Perks

Personal expenses that are run through the business for tax purposes. These include personal vehicles, mobile phone plans, home internet, gym memberships, and business travel that is primarily personal. Each add-back must be supported by receipt documentation.

3. Common Add-Back Mistakes to Avoid

During due diligence, buyers will scrutinize your add-back schedule. Attempting to add back standard operating costs will destroy your credibility and can cause the deal to collapse. Never attempt to add back:

• Advertising or customer acquisition spend (even if you believe it was "inefficient").
• Standard software subscriptions or hosting fees required to run the product.
• Product inventory costs (this is COGS, not a discretionary expense).
• Regular employee salaries (unless they are leaving the business post-sale).

4. SDE Multiples and Exit Strategies

Once your SDE is calculated, a multiple is applied based on the risk profile of your business. In the 2026 market, typical multiples range from 2.0x to 4.5x annual SDE. Adjusting your multiple upwards requires demonstrating low owner dependency, diversified traffic, high gross margins, and clean, auditable financial records.

Typical SDE Multiples by Business Type