Ask any buyer what they want to see first, and the answer is almost always the same: "What does the business really earn?" Not what your tax return shows after you've run every legitimate deduction through it, but the true economic benefit an owner takes home. That number has a name - seller's discretionary earnings, or SDE - and it's the single figure that drives what your business is worth. If you're thinking about selling in the next few years, this is the number to understand.

Your tax return says one thing, your business earns another

Here's a situation we see almost every week. An owner comes in convinced their business isn't worth much because the bottom line on the tax return is thin - maybe $40,000 in net profit on $1.6 million of revenue. On paper, that looks like a business barely scraping by.

But that same owner pays themselves a $95,000 salary, runs a truck and a family cell phone plan through the company, took a one-time $18,000 hit to replace a roof, and expensed a trip to a trade show in Orlando that doubled as a family vacation. None of that is hidden or improper - good accountants legally minimize taxable income. But it means the tax return dramatically understates what the business actually produces for the person who owns it.

SDE exists to bridge that gap. It takes your reported profit and adds back the things that are really benefits to you as the owner, or that a new owner simply wouldn't have to pay. The result is a defensible, apples-to-apples picture of earning power - the number a buyer can borrow against and build their offer on.

So what exactly is SDE?

Seller's discretionary earnings is the total financial benefit a single full-time owner-operator gets from the business in a year. It's the standard measure of earnings for owner-operated "Main Street" businesses - the HVAC company, the landscaping outfit, the restaurant, the machine shop, the distribution firm.

The formula starts with your net profit and adds back four broad categories:

  • Owner's compensation - your salary, payroll taxes on it, and any distributions you take, because a buyer will replace you and account for that separately.
  • Non-cash expenses - primarily depreciation and amortization, which reduce your taxable income but aren't money actually leaving the bank each year.
  • Interest - because the debt is yours, not the business's; a new owner will have their own financing structure.
  • Discretionary and one-time expenses - personal perks run through the business and unusual costs that won't repeat under new ownership.

Add those back to net profit and you have SDE. It answers the buyer's real question: if I step in and run this myself, how much money does this business put in my pocket before financing and taxes?

A worked example: Miller Comfort Heating & Air

Let's make this concrete. Say you own an HVAC company doing $1.6 million in annual revenue. Your tax return shows a net profit of $60,000. A buyer glancing at that might walk away. Here's what an add-back analysis reveals.

Starting from net profit of $60,000, we add back:

  1. Owner's salary and payroll taxes: $110,000 - you pay yourself a market wage plus the employer-side taxes.
  2. Depreciation: $34,000 - mostly on trucks and equipment; a real deduction, but not cash going out this year.
  3. Interest expense: $12,000 - on an equipment loan that's yours, not the buyer's.
  4. Health insurance for you and your spouse: $16,000 - a personal benefit run through the company.
  5. Personal vehicle and phone: $9,000 - the pickup your spouse drives and family phone lines on the business plan.
  6. One-time legal fees: $14,000 - a contract dispute that's now settled and won't recur.
  7. Above-market building rent: $10,000 - you own the building and charge the company $10,000 a year more than a new tenant would pay at market rate.

Add it all up: $60,000 + $110,000 + $34,000 + $12,000 + $16,000 + $9,000 + $14,000 + $10,000 = $265,000 in SDE. The same business that looked like a $60,000 earner is actually generating $265,000 of benefit to its owner. That's not accounting magic - every one of those add-backs is defensible and documentable. And it's the difference between an offer nobody would take and a business worth selling.

Why SDE sets the asking price, not net profit

Main Street businesses are typically priced as a multiple of SDE. Depending on the industry, the quality of the earnings, customer concentration, recurring revenue, and how dependent the business is on you personally, that multiple often lands somewhere in the range of 2 to 4 times SDE - sometimes higher for businesses with strong recurring contracts or genuinely turnkey operations.

In our Miller Comfort example, an SDE of $265,000 at a 3x multiple points to an asking price in the neighborhood of $795,000, before accounting for inventory, equipment, or real estate. Price it off the $60,000 net profit instead and you'd be leaving hundreds of thousands of dollars on the table. This is exactly why the number matters so much - and why buyers scrutinize it so hard.

Two businesses on the same street can report nearly identical tax returns and be worth wildly different amounts. The gap is almost always in the add-backs - and in whether the seller can prove them.

A common lesson from the deal table

There's another reason SDE rules the price: lenders use it too. When a buyer applies for an SBA-backed acquisition loan, the lender wants to see that the SDE comfortably covers the buyer's new loan payments, a reasonable salary for themselves, and a cushion. A clean, well-documented SDE doesn't just raise your price - it makes your business financeable, which dramatically widens the pool of buyers who can actually afford it.

Common mistakes owners make with SDE

Because SDE moves the price so much, it's also where sellers most often trip themselves up - in both directions. The most frequent problems we see:

  • Adding back things you can't prove. If you claim a $9,000 personal vehicle add-back but can't point to it in the books, a buyer's accountant will strike it - and start doubting your other numbers.
  • Adding back a full replacement manager's salary. SDE already assumes one owner-operator. If the business truly needs a $70,000 general manager to run without you, that's a real cost, and sophisticated buyers may adjust for it.
  • Double-counting. Adding back both your W-2 salary and your distributions when they overlap, or counting the same perk twice under different lines.
  • Ignoring legitimate ongoing costs. If you've been deferring truck replacement or equipment maintenance to pump up earnings, buyers notice - and discount accordingly.
  • Cherry-picking your best year. One strong year isn't a trend. Buyers want to see two or three years of SDE, and they'll weight the recent and the typical, not just the peak.

SDE vs. EBITDA - what's the difference?

You may hear the term EBITDA - earnings before interest, taxes, depreciation, and amortization. It's a cousin of SDE, and the distinction is simple but important. The big difference: EBITDA does not add back the owner's salary. It assumes the business pays a market-rate manager to run day-to-day operations.

As a rough rule, SDE and EBITDA differ by roughly one owner's compensation. SDE is the standard for smaller, owner-operated businesses where the owner is hands-on in the daily work. EBITDA becomes the more relevant measure for larger companies - generally north of a few million dollars in earnings - that already run on a management team the owner isn't part of. For most Main Street businesses in the $500K to $10M revenue range, SDE is the right lens. If your business is large enough that a buyer would treat it as an investment they'll hire someone else to run, EBITDA starts to matter more.

How a broker builds a defensible SDE

Calculating SDE isn't just arithmetic - it's building a case you can stand behind when a buyer's accountant and lender pull it apart. Here's how a broker approaches it:

  1. Start with three years of tax returns and financials. Trends and consistency matter as much as any single year's number.
  2. Recast the financials line by line, identifying every legitimate add-back and tying each one to source documents - payroll records, invoices, loan statements.
  3. Separate the truly one-time from the recurring, so a $14,000 legal settlement counts but ordinary annual repairs don't sneak in.
  4. Normalize owner compensation and related-party items like above-market rent on a building you own.
  5. Stress-test each add-back by asking the question a skeptical buyer will ask: can we prove this, and would it really go away under new ownership?
  6. Package it into a clear, documented presentation a buyer and their lender can follow - which is often the difference between a full-price offer and a lowball.

That last point is where owners tend to underestimate the value of a professional. A number you assert is worth far less than a number you can defend. When your SDE holds up under due diligence, the deal closes near the asking price. When it falls apart, buyers renegotiate - usually downward, and usually right before closing when you have the least leverage.

Illustrative figures aside, the principle holds for every business: your reported profit and your real earning power are two different numbers, and knowing the gap between them is the first step toward knowing what your life's work is actually worth. A good broker's recast of your financials, combined with real market data on what comparable businesses have sold for, turns a guess into a defensible valuation.