Seller's Discretionary Earnings is the single number that prices nearly every business small enough for an individual to buy. Brokers quote it, sellers inflate it, and buyers who confuse it with EBITDA quietly overpay. It is neither cash flow nor profit in the textbook sense. It is the total pre-tax benefit a single owner-operator extracts from a business, and once you can read it, the whole market for small companies becomes legible.
The number every listing is built on
Pull up any listing for a business priced under a few million dollars and you will find one figure doing most of the work: Seller's Discretionary Earnings, almost always abbreviated to SDE. The asking price is SDE times a multiple. The broker's pitch is SDE. The bank's loan sizing leans on SDE. It is the lingua franca of the lower end of the market, and it is also, in this writer's experience, the number buyers most often misread. The misreading is not academic. It is the difference between a fair price and a structural overpayment that no amount of operational hustle can recover.
The confusion is understandable, because SDE looks like a cousin of metrics buyers already know: net income, EBITDA, free cash flow. It is related to all of them and identical to none. The International Business Brokers Association, the trade body whose standards most main-street brokers cite, defines SDE as the earnings of a business before income taxes, depreciation, amortization, interest, and non-operating and non-recurring items, plus the owner's compensation and benefits and any discretionary expenses. Read that definition slowly and a single idea falls out of it: SDE measures the total economic benefit available to one owner who actively runs the business. It assumes a buyer who will replace the seller, not hire a manager on top of the seller.
That assumption is the whole story. SDE is the answer to a specific question: if I, one person, buy this business and run it the way the current owner does, how much pre-tax money does it put in my pocket, counting both the profit and the salary I would otherwise pay myself? Every add-back, every adjustment, every argument between a buyer and a seller about what belongs in the number is really an argument about that one question.
What SDE actually adds back
Start with the bottom line of the tax return, the net income, which on a healthy small business that an owner has spent years minimizing for tax purposes is often a small or even negative number. SDE rebuilds the real economics on top of it. First, add back the owner's full compensation: salary, payroll taxes, and the personal benefits run through the company. A business showing $40,000 of net income but paying its owner a $120,000 salary is not a $40,000 business; it is a $160,000 business to the person who will sit in that seat. Next, add back interest, because the buyer will bring their own financing structure, and depreciation and amortization, because those are non-cash accounting entries, not money that left the building.
Then come the discretionary and non-recurring items, where most of the negotiation lives. The owner's personal vehicle on the company books, the family phone plan, the one-time legal bill from a lawsuit that will not recur, the above-market rent paid to a building the owner also owns: each is a legitimate add-back if, and only if, it genuinely will not burden the next owner. This is where honest analysis separates from wishful thinking. A defensible SDE adds back what truly disappears when the seller leaves. An inflated SDE adds back recurring costs dressed up as one-offs, and a buyer who accepts those add-backs is paying a multiple on expenses they will keep incurring.
SDE is not EBITDA, and the difference costs real money
Here is the single most expensive misunderstanding in small-business acquisition: treating SDE and EBITDA as interchangeable. They are not. EBITDA, earnings before interest, taxes, depreciation, and amortization, deliberately does not add back owner compensation. It assumes the business pays a market-rate manager to run it, and it measures what is left over for an absentee owner. SDE adds the owner's pay back in because it assumes the buyer is the manager. The gap between the two numbers is, almost exactly, one full owner's salary.
Why does this matter so much? Because multiples are quoted against the metric, and EBITDA multiples are higher than SDE multiples. If a seller hands you an EBITDA figure but the broker quotes a typical SDE multiple against it, or worse, if you take an SDE number and apply a multiple you saw quoted for EBITDA-priced deals, you have mismatched the numerator and the denominator. The error compounds: you have both overstated the earnings base relative to the multiple and applied the wrong multiple to it. Conflating the two leads to systematic overpayment, and it happens constantly because both acronyms sound like 'the profit number.'
| SDE (Seller's Discretionary Earnings) | EBITDA | |
|---|---|---|
| Owner's salary | Added back (buyer replaces the owner) | NOT added back (assumes a paid manager) |
| Interest, taxes, D&A | Added back | Added back |
| Discretionary / personal items | Added back when truly non-recurring | Generally normalized, not owner-specific |
| Implied buyer | Owner-operator running the business full time | Investor with management in place |
| Size range where it applies | Under roughly $1-2M of earnings | Above roughly $1-2M of earnings |
| Typical multiple range | Roughly 2-3x for the smallest deals | Roughly 4-6x and up as size grows |
How SDE turns into a price
SDE on its own is only half of a valuation. The other half is the multiple, and the multiple is where the real intelligence of pricing lives. A business does not trade at 'the SDE multiple.' It trades at a multiple set by how risky, how transferable, and how growable its specific SDE is. Two businesses with identical SDE can be worth twice as much as each other purely on the quality of that SDE.
- Establish a clean, defensible SDE by rebuilding it from tax returns and stripping out add-backs that will burden the next owner.
- Pick a base multiple for the size and category, using transaction data such as BizBuySell's medians, which for the smallest main-street businesses cluster around 2-3x SDE.
- Adjust the multiple up for durable, recurring revenue, documented systems, a diversified customer base, and clean books, and down for owner-dependence, customer concentration, and lumpy or declining sales.
- Multiply the clean SDE by the adjusted multiple to get an indicated value, then sanity-check it against what a buyer can actually finance and service from the same cash flow.
Notice what is doing the work in that sequence. The SDE sets the scale, but the multiple captures everything that makes one business safer or more promising than another. Owner-dependence pulls the multiple down hard, because if the business is really the owner's relationships and reputation, the SDE walks out the door at closing. Recurring revenue pulls it up, because durable cash flow is worth more than cash flow you have to re-win every month. This is why the multiple, not the SDE alone, is what risk, growth, and owner-dependence actually move.
Size your indicated value
The arithmetic of a first-pass valuation is genuinely this simple: clean SDE times the right multiple. The calculator below does exactly that. Put in an SDE and a market multiple and it returns the indicated business value. The discipline is not in the multiplication; it is in making sure both inputs are honest.
Run the defaults and the answer is straightforward: at $250,000 of SDE and a 3x multiple, the business is worth about $750,000. But hold the SDE fixed and watch what the multiple does. The same $250,000 of earnings at a 2x multiple is a $500,000 business; at a 4x multiple it is a $1,000,000 business. Nothing about the cash flow changed. What changed is the market's read on its risk, its growth, and how much of it depends on the seller personally. The multiple, not the SDE alone, is what risk, growth, and owner-dependence actually move, which is why two listings with the same SDE can carry wildly different asking prices and both be fairly priced.
Where SDE stops working
SDE is the right lens for owner-operated businesses, and only those. As a business grows past the point where one working owner can plausibly run it, the metric breaks down. Somewhere in the range of $1-2M of earnings, buyers stop pricing on SDE and switch to EBITDA, because at that scale the buyer will not personally run the company; they will own it and employ managers. Adding an owner's salary back becomes meaningless when the business already pays a full management team that the next owner will keep.
This transition is not a hard line but a zone, and it is exactly where the most interesting mid-market deals live. A business earning $1.5M with a real management layer might be quoted on EBITDA at a higher multiple, while a similar-sized business still run hands-on by its founder gets quoted on SDE at a lower one. The same dollars of cash flow, priced two different ways, because the question 'who runs this after closing?' has two different answers. Knowing which lens applies, and pushing back when a seller picks the more flattering one, is a core acquisition skill.
See SDE in real business models
The fastest way to internalize SDE is to watch it move in concrete businesses. Each of these models on SMBNEST lets you see how owner pay, add-backs, and recurring revenue shape the number that ultimately sets the price.