Small Business Valuation: How SDE and Multiples Set Your Price

By MercConsulting · Published 2026-07-19

Most small businesses are priced on SDE, not EBITDA. Here's how Seller's Discretionary Earnings and valuation multiples work, and how to calculate yours.

Most small businesses — companies earning roughly under $5 million a year — aren't valued the way you see on business news, with an EBITDA multiple pulled from a public company's earnings call. They're valued off Seller's Discretionary Earnings (SDE), a number that captures everything the business actually puts in one owner-operator's pocket, multiplied by a market-based multiple that usually lands somewhere between two and four times SDE. The multiple isn't a fixed rate; it moves up or down based on how risky and how transferable that income stream looks to somebody who isn't you.

If you've ever heard a broker, a buyer, or an SBA lender ask "what's your SDE?" and not been totally sure how to answer, you're not alone. Most owners know their revenue and profit cold, but SDE is a different calculation, built specifically for how small businesses get bought and sold. Get it wrong and you either scare off a serious buyer with an inflated number, or leave real money on the table by underselling what you've built.

MercConsulting has advised Houston-area owners on formation, acquisition, and growth since 1998 — better than 25 years across both sides of the table. The mechanics below are the same ones we walk clients through before any number goes in front of a bank, a broker, or a buyer.

"I knew exactly what the business made me every year. What I didn't understand was that the number I lived on and the number a buyer would actually pay for it were two completely different calculations."

What SDE Actually Measures

Seller's Discretionary Earnings is the total financial benefit one full-time owner-operator gets from running the business, before that owner's own compensation is subtracted out. It starts with net profit and adds back the things that are really discretionary spending by the owner rather than a true cost of running the company: the owner's salary, personal expenses routed through the business, one-time or non-recurring costs, and non-cash items like depreciation and interest.

The reason SDE exists as its own metric comes down to who's buying. A private equity firm acquiring a $40 million company assumes a professional management team stays in place, so EBITDA (earnings before interest, taxes, depreciation, and amortization) is the right lens because it measures earnings independent of any one person. A buyer of a $600,000 landscaping company or a $1.2 million HVAC business is usually planning to step into the owner's chair personally. SDE answers the question that buyer actually has: "if I do this job myself, what does this business pay me?"

SDE vs. EBITDA vs. Net Profit

Net profit is what's left after every expense, including whatever the owner currently pays themselves. EBITDA adds back interest, taxes, depreciation, and amortization but leaves owner compensation untouched — appropriate when a replacement manager needs a market-rate salary. SDE goes one step further and adds owner compensation back in too, along with personal expenses many owners legitimately run through the company. None of the three is "wrong" — they answer different questions for different buyers, and using the wrong one is one of the fastest ways to misprice a deal.

How to Calculate Your Business's SDE

The calculation itself is straightforward arithmetic. The work — and where owners get it wrong — is in identifying every legitimate add-back and being able to document each one if a buyer's accountant asks.

What SDE Multiple Should You Use?

Most small, owner-operated businesses sell in a range around two to four times SDE, though the number that applies to your business depends heavily on industry, size, and how it's run. A larger, more established business in the same industry typically commands the higher end of that range, because it looks less risky and less dependent on any one person, including its current owner.

There isn't a single universal number, and treating an online "SDE multiple calculator" as gospel is one of the more common ways owners misjudge their own business. The multiple is really a proxy for risk and transferability — how confident a buyer can be that earnings continue once the owner walks away, and how much work it takes a new owner to keep them going.

What Pushes a Multiple Higher

• Recurring or contracted revenue — service agreements or long-standing repeat customers reduce a buyer's uncertainty about next year's numbers.
• Low owner dependency — a business with a working manager and trained staff can survive the owner stepping back for two weeks, which tells a buyer the same will be true after closing.
• Diversified customer base — no single customer representing an outsized share of revenue.
• Documented systems — written procedures, a real CRM, and clean books signal that institutional knowledge lives in the business, not just in the owner's head.
• A multi-year growth trend — consistent, explainable growth beats a single strong year that looks like an outlier.

What Pushes a Multiple Lower

• Heavy customer concentration — one client at 40% of revenue is a single point of failure a buyer has to price in.
• Total owner dependency — if the business only runs because you personally handle sales, service, and every key relationship, a buyer is effectively purchasing a job, not a company.
• Messy or commingled financials — books mixing personal and business expenses without documentation slow diligence and raise doubt about every number you present.
• Declining or flat revenue — a shrinking trend line gets discounted even if current profitability still looks fine.

Buyers run through nearly this exact checklist before they ever talk price — our guide to buying an existing business covers it from the other side of the table, and it's worth reading even as a seller.

Common Valuation Mistakes We See

Beyond that specific mix-up, the mistakes tend to repeat across industries:

• Treating SDE as a fixed formula instead of a judgment call. Two accountants can produce two defensible numbers from the same financials depending on how aggressively they normalize add-backs. Consistency and documentation matter more than chasing the highest possible figure.
• Forgetting to adjust owner salary to market rate. If you've been paying yourself far below what it would cost to hire a replacement manager, your "unadjusted" SDE overstates what's really available to a new owner.
• Anchoring to what a friend's business sold for. Multiples vary by industry, region, size, and deal structure — a number from a different type of business is close to useless as a benchmark for yours.
• Skipping the buyer's-eye view of risk. Owners tend to value the business on its good years and their own emotional investment. Buyers value it on how confidently they can underwrite next year's earnings without the owner in the building.

DIY Estimate vs. a Formal Valuation

A back-of-the-envelope SDE times an industry-typical multiple is genuinely useful for internal planning — deciding whether it's worth exploring a sale, setting expectations before talking to a broker, or gut-checking an unsolicited offer. It is not the same as a formal valuation, and the two shouldn't be confused when real money or legal obligations are involved.

A certified or professionally prepared valuation earns its cost when the number needs to hold up to outside scrutiny: SBA or bank financing, a partner buyout, a divorce or estate matter, or a negotiation with a buyer who has their own advisors picking apart your assumptions. In those situations, a defensible, documented valuation is often the difference between a deal that closes on your terms and one that stalls in diligence.

This is exactly the kind of work our business acquisition consulting engagements are built around — getting the SDE calculation right and benchmarking the multiple against comparable transactions. See the range of situations we've worked through in our portfolio, and how we approach the work on our Why Us page.

Frequently Asked Questions

What is SDE in a business valuation?

SDE, or Seller's Discretionary Earnings, is the total financial benefit one owner-operator gets from a business in a year. It starts with net profit and adds back owner salary, interest, taxes, depreciation, amortization, and one-time or personal expenses run through the company. It's the standard earnings measure used to value most small, owner-operated businesses.

What's a good SDE multiple for a small business?

Most small, owner-operated businesses sell somewhere between two and four times SDE, but the exact multiple depends on industry, size, growth trend, and how dependent the business is on its owner. A larger, well-documented business with recurring revenue typically lands toward the higher end; a smaller, owner-dependent one lands lower.

How is SDE different from EBITDA?

EBITDA adds back interest, taxes, depreciation, and amortization but leaves owner compensation as an expense — appropriate when a buyer expects to hire a professional manager. SDE goes further and adds owner compensation back in too, since it's built for buyers who plan to run the business themselves. Mixing the two multiples will misstate the value significantly.

Do all industries use the same SDE multiple?

No. Multiples vary by industry based on typical risk, growth prospects, and how transferable the business model is to a new owner. A service business with contracted, recurring revenue often supports a different multiple than one built on one-off transactions, even at similar revenue levels.

Can I estimate my SDE multiple myself?

You can build a reasonable starting estimate using the add-back steps above, and it's a useful exercise for internal planning. But a self-prepared estimate typically won't hold up in a bank's or serious buyer's due diligence, since it relies on your own judgment calls about which add-backs are legitimate.

When do I need a formal, certified valuation instead of an estimate?

Get a formal valuation whenever the number needs to survive outside scrutiny: SBA or bank financing for a purchase, a partner buyout, a legal matter like divorce or an estate, or a negotiation with a buyer who has their own financial advisors. In those situations, a documented, defensible valuation protects you far more than a quick estimate does.

This article is for educational purposes only and is not legal, tax, or investment advice. Consult qualified professionals about your specific situation.