SDE Multiple for Ecommerce: How Small Online Stores Are Valued

Sooner or later most store owners wonder what their business is worth, whether because they are thinking about selling, bringing in a partner, or simply measuring progress. For small online businesses, the number most often used in the conversation is a multiple of seller's discretionary earnings, usually shortened to the SDE multiple. This guide explains what SDE is, how to calculate it from an online store's books, where the multiple comes from, and what to check before relying on any estimate.

What seller's discretionary earnings means

Seller's discretionary earnings (SDE) is a measure of the total financial benefit that one full-time owner-operator gets from a business. The business-brokerage glossary definition, as quoted by the business-sale advisory firm Iconic, describes SDE as the earnings of a business prior to income taxes, depreciation, amortization, interest, and non-operating and nonrecurring income and expenses, plus one owner's entire compensation (including benefits and any non-business or personal expenses paid by the business). In practice that means: start with net profit, then add back the things that would not necessarily continue under a new owner, or that reflect how the owner chose to run and pay for the business.

The reasoning is that a small business is often a job as well as an investment. A buyer of a store with one owner who works full time is, in effect, buying the owner's role together with the profit. SDE shows the pool of money that a person stepping into that role could expect to take home.

How to calculate SDE for an online store

Work from the profit and loss statement for a consistent period, such as the last 12 months, and adjust it line by line.

SDE = net profit + one owner's total compensation + interest + depreciation and amortization + discretionary personal expenses + non-recurring costs (minus non-recurring gains)

Typical add-backs:

• Owner compensation. One owner's salary or draws, plus related payroll taxes, benefits and retirement contributions. A second family member's pay generally is not added back in full if that person does real work the buyer would have to replace.
• Interest, depreciation and amortization. These are financing and accounting items rather than operating cash costs.
• Discretionary personal expenses. Costs such as a personal vehicle, phone plan or travel run through the business, if you can document them.
• Non-recurring items. A one-time legal settlement, a one-off platform migration, or an unusual write-off that is unlikely to repeat. Gains that will not repeat, such as a single large wholesale order or a one-time insurance payout, are deducted.

Items that should generally not be added back are normal operating costs that a buyer will also bear: advertising spend, payment and marketplace fees, shipping, software subscriptions, contractor pay for ongoing work and cost of goods. Adding those back makes the business look more profitable than it is, and a buyer's due diligence tends to find it.

An illustrative example

The figures below are invented to show the arithmetic and are not data from any real store.

What the multiple is

Once you know SDE, a value estimate is that SDE multiplied by a multiple. The multiple is not a formula. It comes from what comparable businesses have sold for relative to their SDE, so it moves with size, growth, risk and industry.

To give a sense of the range, Iconic's overview cites the BizBuySell 2025 Year in Review, which reported an average SDE multiple of about 2.61x across small businesses sold, with a median SDE of $158,950 and a median sale price of $350,000 in that dataset. The same article cites BizBuySell's industry report with an online or technology category at roughly 3.33x, and cites IBBA and M&A Source figures showing median multiples that rise as a business gets larger. These are averages across many different sales, they are not specific to ecommerce stores, and an individual store can land well above or below them. Treat them as context for a conversation, not as a quote for your business.

Using the illustrative $148,000 SDE above, a 2.5x multiple would imply about $370,000 and a 3.0x multiple about $444,000. The point of the exercise is to see how sensitive the result is: a half-point change in the multiple moves the estimate by $74,000 here, which is why the quality of the earnings figure and the case for a higher multiple matter more than any single average.

What tends to raise or lower the multiple

Buyers and valuers look at risk. For an online store the usual factors are:

• Traffic and sales concentration. Heavy dependence on one ad platform, one marketplace or one supplier is a recognised risk. A diversified acquisition mix generally supports a better multiple.
• Owner dependence. If the business only runs because the owner personally handles suppliers, support and ads, a buyer will discount it. Documented processes and a team help.
• Trend. Steady or growing profit over several years is more convincing than one strong year.
• Margin quality. Stable gross and contribution margins, and low return and chargeback rates, reduce uncertainty.
• Customer base. A meaningful share of repeat customers and an owned email list make revenue more predictable than a store living on first-time buyers from paid ads.
• Assets and accounts. Clean ownership of the domain, store platform account, social accounts, supplier agreements and brand rights. If the brand name has trademark questions, that can complicate a sale.
• Inventory. Whether inventory is included in the price or added on top at cost is a negotiation point, and slow-moving stock may be discounted.

SDE versus EBITDA

You will also hear about adjusted EBITDA. Both measures add back interest, taxes, depreciation and amortization. They differ on owner pay: SDE adds back one owner's full compensation because it assumes the buyer will run the business, while adjusted EBITDA assumes the buyer will hire a market-rate manager and so adds back only the owner pay above that manager's cost. The two use different multiples, and mixing them up can badly over- or under-value a business. Smaller owner-operated stores are usually discussed in SDE terms, while larger businesses with a management team are more often valued on adjusted EBITDA.

A due diligence checklist for the seller

Whatever multiple is used, a serious buyer will test the earnings behind it. Having these ready makes a sale smoother and makes your own estimate more honest:

1. Profit and loss statements and balance sheets for several years, reconciled to tax returns.
2. Platform reports for revenue, orders, refunds and chargebacks that tie to the books.
3. A list of every add-back with documentation.
4. Supplier terms, inventory records and cost of goods history.
5. Traffic and advertising reports by channel.
6. Customer and email-list data, handled in line with privacy rules.
7. Ownership records for the domain, store, brand assets and social accounts.
8. Any pending disputes, tax questions or compliance issues.

Limits of a back-of-the-envelope valuation

An SDE multiple is a quick way to frame a conversation, not a substitute for a professional valuation. Add-backs are judgment calls and buyers often challenge them. Multiples published as averages mix very different businesses. Tax treatment, deal structure, inventory and earn-outs can change what a seller actually receives. For a transaction of any size, speak with an accountant and a business-sale adviser before agreeing a price.

Summary

SDE is net profit adjusted to show what one full-time owner earns from the business. The SDE multiple turns that figure into a rough value, and the multiple depends on comparable sales, risk and size rather than on a fixed formula. Calculate your SDE conservatively, document every add-back, understand what lifts or lowers a multiple in your own store, and treat published averages as a reference point, not a promise.

This article is general information, not financial, tax or legal advice. Valuation depends on facts specific to each business.

Sources

• Iconic, "Discretionary earnings" (SDE definition drawing on the IBBA glossary, add-backs, SDE versus adjusted EBITDA, and the cited BizBuySell 2025 Year in Review figures of 2.61x average SDE multiple, $158,950 median SDE and $350,000 median sale price; BizBuySell industry multiple for online/technology of about 3.33x; IBBA/M&A Source tiers): https://iconic.co/blog/discretionary-earnings/
• The risk factors listed under "What tends to raise or lower the multiple", the list of costs that should not be added back, and the deduction of non-recurring gains (which follows from the IBBA wording "nonrecurring income and expenses") are general reasoning, not sourced statistics.
• Dollar figures in the worked examples are invented illustrations.