Seller's Discretionary Earnings (SDE), Explained

Seller's discretionary earnings — SDE — is the total cash one owner-operator pulls out of a small business in a year. It's net profit with the owner's pay, perks, and a handful of one-time costs added back, so you can see what the business actually puts in your pocket if you run it yourself. It's the number almost every small-business deal under ~$1M is priced on, and the number a seller has the most room to dress up.

If you're buying a small business, SDE is the first number that matters and the one you'll fight over most. So let's take it apart — the formula, why small deals use it instead of EBITDA, what the multiple actually means, and the add-back trap that quietly inflates half the listings you'll see.

What seller's discretionary earnings actually is

Net income on a small-business tax return is almost always a lie of omission. Not fraud — just incomplete. The owner runs personal stuff through the company, pays themselves a salary that's really just profit in a different costume, and books a few one-time costs that won't follow the business to a new owner. The bottom line you see is not the cash the business throws off.

SDE fixes that. The International Business Brokers Association defines it as the earnings of a business before income taxes, depreciation, amortization, interest, non-operating income and expenses, non-recurring income and expenses, and one owner's entire compensation — salary, benefits, and any personal expenses the business was paying for. Strip all of that out, add it back to profit, and you've got the real owner-operator cash flow.

Here's the formula in plain terms. Start with net income, then add back:

• Interest — it's a financing choice, not an operating cost, and your loan won't look like theirs.
• Taxes — same reason; depends on the entity and the owner, not the business.
• Depreciation and amortization — non-cash, paper expenses.
• One owner's full compensation — salary, payroll taxes, benefits. Key word: one.
• Owner perks and personal add-backs — the car the business pays for, the family phone plan, the "business" trip to Cabo, the health insurance for the owner's spouse.
• Genuine non-recurring items — the lawsuit that settled once, the new roof, the rebrand the business will never pay for again.

So SDE = net income + interest + taxes + depreciation + amortization + one owner's compensation + owner perks + true one-time items. That last bucket is where the whole thing gets gamed — hold that thought, it's the last section.

Why small deals price on SDE and big deals price on EBITDA

You'll hear both SDE and EBITDA thrown around, and people use them like they're interchangeable. They're not. The line between them is a single salary.

EBITDA — earnings before interest, taxes, depreciation, and amortization — does not add back the owner's pay. It assumes the business pays a manager to run it and measures what's left. SDE adds that one owner's compensation back in. Same business, two different numbers, and the gap between them is whatever it'd cost to replace the owner.

The reason small deals use SDE is simple: in a sub-$1M business, the owner is the operation. They answer the phones, close the sales, sign the checks. Asking "what does this earn if you ignore the owner" is a nonsense question, because there is no business without the owner. So you measure the whole pie — profit plus owner pay — and that's SDE. As a rough rule of thumb, businesses with under roughly $1M in earnings get valued on SDE; above that, where the business runs on a real management team and the owner is closer to an investor, deals move to EBITDA.

Why it matters to you as a buyer: never compare an SDE multiple to an EBITDA multiple. They're not the same units. SDE produces a bigger earnings number and trades at lower multiples (roughly 2-4x). EBITDA produces a smaller number and trades at higher multiples (roughly 4-8x). If a broker quotes you a "4x multiple" on a $400K-cash-flow business, ask 4x of what — because 4x SDE and 4x EBITDA are wildly different prices. This is the same logic that runs underneath how to value a small business; this post is just zoomed in on the SDE half.

The SDE multiple — what it means and what's normal

Once you have SDE, price is mostly SDE × a multiple. The multiple is the market's shorthand for how risky and how transferable the cash flow is. A business that runs without you, with diversified customers and recurring revenue, earns a higher multiple. One that's really just you with a logo earns a lower one — because the day you leave, so might the revenue.

What's a normal multiple? Real, current numbers: across all the small businesses that actually sold in 2024, the average cash-flow (SDE) multiple was about 2.57x, up from 2.49x the year before, on a median sale price of $345,000. That's the BizBuySell marketplace data — owner-operator businesses, not the $5M deals. Most small businesses land somewhere in the 2-3x band, with the better ones pushing toward 3-4x and the shakier ones below 2x.

So when you see a listing asking 4.5x SDE, that's not automatically a ripoff — but it is above the market average, and the price tag is making a claim about quality. Your job in diligence is to find out whether the business earns it. And before you can even argue about the multiple, you have to trust the SDE it's multiplying. Which brings us to the part where most listings cheat.

The add-back trap — legit vs. aggressive

Here's the thing about SDE: the seller calculates it. They decide what counts as an add-back. And every add-back is a dollar-for-dollar boost to the number your purchase price is built on. A $50K "add-back" at a 3x multiple is $150K of asking price. So sellers are heavily, heavily motivated to add back everything they can get away with, and brokers help them. This is the single biggest place small-business deals get inflated.

A legitimate add-back passes one test: would a new owner genuinely not have this cost? Two kinds clear that bar.

• True owner perks. The owner's salary, the personal car, the country-club membership booked as "client development," the health insurance for the owner's family. A new owner can choose not to spend that. Legit — add it back.
• Genuine one-offs. A lawsuit that settled once and is over. A roof replacement. The cost of moving locations. Things that happened, are documented, and will not recur. Legit — add it back.

Now the aggressive ones — the add-backs that quietly turn a $200K business into a "$300K" business on paper. Hunt these:

• The "one-time" cost that happens every year. A "one-time marketing push," a "one-time" software migration, a "one-time" equipment repair — that shows up in 3 of the last 5 years. A useful rule: if a cost has happened twice, you budget for it; three times and it's recurring, not an add-back. Pull the actual tax returns and count.
• Add-backs for work a new owner will actually have to pay for. The seller adds back their own $0 salary because they "work for free" — but they're doing the job of a $90K operations manager. The day you take over, that's a real $90K cost you'll either pay yourself in sweat or pay someone in cash. That's not discretionary earnings; that's a job. With two owners, you only add back one salary — the second one's function still needs to be filled.
• A below-market owner salary that hides a negative add-back. If the owner pays themselves $60K but the role really costs $130K to fill, the honest adjustment is minus $70K, not zero. Sellers conveniently forget that direction exists.

A fast gut-check from the lending side: if add-backs run more than ~30% of the claimed SDE, assume a haircut until each one is proven on a tax return. Lenders live by a simpler version — if it's not on the tax return with documentation, it doesn't exist. You should treat it the same way. A clean SDE you can verify is worth more than a fat SDE you have to take on faith, because at closing the bank underwrites the verifiable one, not the story.

None of this is in the CIM in plain sight, by the way — the add-back schedule is usually a footnote you have to dig for. If you want the map of where these games hide in the deal package, that's exactly what how to read a CIM walks through.

What to actually do with this

You don't need to be an accountant. You need to do 3 things on every deal. One: get the real SDE, not the broker's SDE — which means tracing every add-back back to a tax return or a bank statement and throwing out the ones that don't hold. Two: figure out which "add-backs" are really jobs you'll have to fill, and subtract those, because they're your future cost. Three: only then look at the multiple, and ask whether this specific business — its customer concentration, its dependence on the owner, its growth — earns the one being asked.

This is the boring math that separates buyers who overpay from buyers who don't. It's also exactly the part DealStratum is built to speed up: drop in the CIM, and it pulls the SDE and the add-backs the seller listed, charts the revenue trend, flags customer concentration, and hands you the implied multiple — so you start from a structured read instead of a 40-page PDF and a calculator. It doesn't decide which add-backs are real for you, it doesn't value the business, and it won't do your diligence — that part is on you and your advisors. It just gets you to the number fast enough that you can spend your time on the question that matters: is this SDE real, and is it worth the price.

DealStratum helps you find and source a business to buy — on-market and off. It's not a broker, a lender, or a financial advisor. Nothing here is investment or financial advice.

Sources

• International Business Brokers Association (IBBA) — SDE definition
• BizBuySell 2024 Insight Report — median sale price & cash-flow multiple (via Small Business Trends)
• Morgan & Westfield — SDE vs. EBITDA and the ~$1M threshold
• Wall Street Prep — Seller's Discretionary Earnings formula
• EBIT Community — SDE adjustments: what lenders accept vs. reject