A publicly traded company gets valued every few seconds by thousands of strangers trading shares. A privately held business doesn't have that luxury. There's no live price feed, no market consensus updating in real time, just a set of methodologies, some negotiation, and a fair amount of judgment. That's what makes private market valuation genuinely harder than it looks from the outside, and also why so many deals stall over disagreements about a number that was never going to be perfectly objective in the first place.

According to the BizBuySell Insight Report's 2025 full-year data, roughly 9,586 small businesses closed through BizBuySell-tracked brokers last year, at a median sale price of $350,000 and a median 170 days on market. Valuation disagreements are a major reason deals don't reach that finish line at all. The Pepperdine Private Capital Markets Report found that a valuation gap between buyer and seller was the single most common reason lower middle market engagements failed to close, cited in roughly 26 percent of cases. Getting the number right, or at least defensible, matters more than most first-time sellers expect.

Why Private Valuation Works Differently Than Public Markets

Public company valuation leans heavily on market data that simply doesn't exist for private businesses: real-time trading prices, analyst coverage, continuous disclosure. Private valuation has to build that picture from scratch using whatever data is available, comparable transactions, industry benchmarks, the company's own financial history, and a negotiated view of risk.

That's part of why private valuations tend to carry a discount relative to similarly performing public companies. Investors demand compensation for illiquidity, for the fact that a private stake can't be sold in an afternoon the way a public share can, and for the added risk that comes with thinner disclosure and a smaller pool of potential buyers.

The Three Core Approaches

Most private valuations pull from three broad methodologies, often blended together rather than used in isolation.

  • Income approach: values the business based on its ability to generate future cash flow, typically through a discounted cash flow model or a multiple applied to current earnings.
  • Market approach: compares the business to similar companies that have recently sold, or to comparable public companies, adjusting for size and growth differences.
  • Asset approach: values the business based on the fair market value of its underlying assets minus liabilities, more common for asset-heavy or distressed businesses than for going concerns with strong cash flow.

For most small and mid-sized private businesses, the market approach, applying a multiple to a normalized earnings figure, ends up doing the heavy lifting, largely because it's the method buyers, brokers, and lenders all default to when comparing a deal against what similar businesses have actually sold for.

Getting Earnings Right Before Applying Any Multiple

Before any multiple gets applied, the earnings figure itself has to be normalized, and for smaller owner-operated businesses, that figure is usually Seller's Discretionary Earnings rather than straight net income. SDE adds back the owner's salary, personal perks run through the business, one-time expenses, and non-cash items like depreciation, producing a figure that reflects what a new owner-operator could actually expect to take home.

This step trips up a lot of first-time sellers, because two businesses with identical net income on paper can have very different SDE once add-backs are accounted for, and buyers scrutinize this number closely. According to the same BizBuySell 2025 data, the median cash flow of sold small businesses was $158,950, on median revenue of $703,000, and the average business sold for roughly 2.5 times SDE. That multiple varies enormously by industry: car washes averaged 4.7x SDE, HVAC businesses around 2.8x, and restaurants typically fell in the 1.5x to 2.5x range.

Where EBITDA Multiples Take Over

Once a business grows past the point where a single owner-operator's discretionary earnings capture the full picture, typically once professional management is running day-to-day operations, valuations shift from SDE multiples to EBITDA multiples. The gap between the two isn't just terminology. EBITDA multiples generally run higher than SDE multiples for a given business, partly because EBITDA-valued companies tend to be larger and less dependent on a single owner, which lowers the buyer's perceived risk. Those multiples vary considerably by industry and revenue band, and you can see a full breakdown Here to get a sense of just how much range exists even within a single sector once company size changes.

GF Data's tracking of lower middle market buyouts found an average EBITDA purchase multiple of 5.9x for platform deals in the $10 million to $25 million enterprise value range through the first nine months of 2025, a meaningfully different number than what a $500,000-revenue small business would command. Size, industry, growth trajectory, customer concentration, and management depth all shift where a specific company lands within its industry's typical range.

How Long the Process Actually Takes

Valuation doesn't happen in isolation from the sale process itself, and the timeline matters for how an owner should think about the number. BizBuySell's 2025 data puts the median time on market for a small business at 170 days from listing to close, and that's only for the roughly 20 to 30 percent of businesses that go to market and actually sell at all, according to figures from the Exit Planning Institute. A majority of listed businesses never close a deal, and a stale or overly optimistic valuation is frequently part of why.

That statistic changes how a valuation should be used practically. A number that only makes sense if a buyer materializes within a few weeks isn't a realistic anchor for a process that, on average, runs nearly six months even when it succeeds. Owners who treat their valuation as fixed regardless of how long a business sits on the market often end up chasing a number the market has already told them, through months of buyer silence, isn't supportable.

Preparing the Business Before Seeking a Number

A valuation performed on clean, well-organized financials and one performed on inconsistent bookkeeping can produce meaningfully different results for the same underlying business, even before a buyer gets involved. A few steps tend to move the eventual number more than owners expect:

  • Separate personal and business expenses clearly for at least two to three years of financials, since this is exactly what determines a defensible SDE or EBITDA figure.
  • Document any customer contracts or recurring revenue arrangements formally, rather than relying on informal, handshake relationships that don't transfer cleanly to a new owner.
  • Address any owner-dependency issues, delegating key relationships and operational knowledge, well before a sale process starts rather than during diligence.
  • Get at least a rough estimate early, well before actively marketing the business, so expectations can be reset gradually rather than during active negotiation with a buyer.

None of this changes the underlying methodology used to reach a number. What it changes is how defensible that number is once a buyer's advisors start asking for the documentation behind it, which is usually where early, unprepared valuations start to unravel.

Why the Same Business Can Get Two Very Different Numbers

It's common for a business owner to get one number from an online estimate and a very different one from a broker or M&A advisor, and both can be defensible depending on what each is actually measuring. A quick estimate based on industry-average multiples gives a useful starting point, but it can't account for factors a buyer will absolutely weigh: customer concentration, the strength of the management team below the owner, recurring versus one-time revenue, and how transferable the business actually is without its current owner in the picture.

A Valuation Calculator is a reasonable way to get an initial range before investing in a full valuation engagement, especially for an owner who's still deciding whether a sale makes sense at all. It won't replace a formal valuation once a deal is actually on the table, but it turns a vague guess into a number grounded in real transaction data, which tends to make the first conversation with a broker or buyer considerably more productive.

What Actually Moves the Number in Negotiation

Once a formal process starts, the initial estimate is really just an opening position. A few factors consistently move the final number more than owners expect going in:

  • Customer concentration: a business where one client represents 30 percent or more of revenue is a red flag buyers price in immediately.
  • Recurring revenue: contracted or subscription-based revenue commands a premium over one-off project work, even at similar total revenue.
  • Management depth: a business that can run without its owner for an extended stretch is worth more than one that can't.
  • Financial documentation quality: clean, well-organized financials shorten diligence and reduce the discount buyers apply for perceived risk.
  • Growth trajectory: a business trending upward supports a higher multiple than a flat or declining one, even with identical current-year earnings.

None of these show up cleanly in a quick multiple-based estimate, which is exactly why the gap between an owner's expectation and a buyer's opening offer tends to widen the longer a business has been valued using only a rule-of-thumb multiple rather than a full picture of these factors.

The Takeaway

Private market valuation isn't a single formula, it's closer to a negotiation supported by data. The strongest starting position comes from understanding which earnings figure actually applies to a business's size and structure, where its industry multiple typically lands, and which specific factors are likely to move a buyer's number up or down from there. Getting that groundwork right before a deal is ever on the table tends to be the difference between a valuation that holds up under scrutiny and one that falls apart the moment a buyer starts asking real questions.