How to Value a Small Business

A small business is worth some multiple of what it really earns for its owner. Get the earnings right and the multiple honest, and you won’t overpay.

Start with SDE

Most Main Street businesses are valued on Seller’s Discretionary Earnings (SDE) — the total financial benefit a single owner-operator gets from the business. You build it from net profit, then add back the owner’s salary, perks, interest, taxes, depreciation, and one-time costs. SDE answers the buyer’s real question: how much will this business pay me to run it?

The multiples (illustrative)

• Main Street businesses typically sell for roughly 2–3.5× SDE (the broad range runs ~1.5–4×). In 2024 the average was around 2.6× with a median sale price near $350,000.
• Revenue rules of thumb land near 0.6–0.7× annual sales for many Main Street firms — useful only as a sanity check.
• Larger, professionally managed firms shift to EBITDA multiples — often 4–7× or more — usually once EBITDA passes roughly $2M and a management team has replaced the owner.

These are general ranges for orientation, not a quote; actual value varies widely by industry, size, and quality.

The SDE add-back ladder — how a $180K net income becomes $340K SDE

Most Main Street tax returns dramatically understate what the business actually pays the owner-operator. The tax return is optimized for the smallest possible taxable income. SDE is optimized for the largest defensible economic benefit. The gap between the two is what a business broker or a Quality-of-Earnings analyst spends most of their time constructing.

The SDE build starts with reported net income and adds back every dollar the current owner-operator captures that a new owner would either eliminate, replace with a market-rate expense, or restructure. The categories are consistent across most Main Street deals:

SDE vs EBITDA — when each applies

SDE and EBITDA measure related but different things. Using the wrong one for a given business produces a valuation that’s off by 30–50 percent in either direction.

The transition from SDE to EBITDA happens somewhere between $1M and $2M of underlying earnings, when the business is either large enough that the owner has stopped doing the work themselves, or the buyer pool has shifted from individual searchers to institutional acquirers. A business right at that transition is often valued both ways in a sale process, with the higher of the two anchoring the ask.

Main Street vs lower-middle-market multiples by industry

The 2–3.5× SDE range is a starting point, not a specific answer. The actual multiple for a given business tracks the industry’s current transaction data, the specific business’s quality attributes, and the buyer pool competing for the deal. The table below shows current-market Main Street SDE multiple ranges by industry, based on published broker association data (BizBuySell Insight Report, IBBA Market Pulse, Pratt’s Stats), practitioner-reported deals, and Institute case coverage.

Ranges are current-market illustrative benchmarks; industry-specific brokers, appraisers, and Quality-of-Earnings firms will produce more precise ranges for a given transaction. Data sourced from BizBuySell Insight Report (Q2 2025), IBBA Market Pulse (2024), practitioner survey data, and Institute case coverage.

The nine drivers that move a multiple within its industry range

Once the industry range is established, the specific multiple within that range is determined by nine business-quality drivers. Two HVAC companies in the same city with identical $400K SDE can transact at 2.2× and 3.4× SDE, a difference of $480,000 on the same earnings, based entirely on where each falls on these nine dimensions.

1. Growth trajectory

Trailing-three-year revenue and SDE trend. A business growing 15% annually with expanding margins commands a premium; a business declining 5% annually is discounted or unsaleable at any multiple. Buyers pay for the future, not the past.

2. Recurring or contracted revenue

Contracted revenue — maintenance agreements, subscriptions, service plans — is worth 1.5–2× what one-time transactional revenue is worth, dollar for dollar. A pest-control company with 80% recurring contract revenue trades at a materially higher multiple than a landscape company that re-quotes every job.

3. Customer concentration

Any single customer representing more than 15–20% of revenue is a discount factor. Any single customer above 40% is a deal-killer or an aggressive discount. Buyers price the risk that the customer walks after transition. Diversified customer bases (top-10 customers under 30% combined) command premium multiples.

4. Owner dependence

The single largest driver, and the hardest one for owner-operators to accept. If the business runs because the owner is the technical expert, the primary salesperson, the key relationship, or the operational nerve center, the multiple drops materially. Buyers pay premium multiples for businesses where the owner could disappear for six months and revenue would not decline. This is why professional-services businesses (law, accounting, medical) chronically underperform on multiple — they are structurally owner-dependent.

5. Financial statement quality

Businesses with GAAP-compliant accrual financials reviewed by a CPA transact at higher multiples than businesses with cash-basis QuickBooks records assembled by a bookkeeper. The reason isn’t just verifiability — it’s that clean financials give the buyer’s lender confidence to size the debt more aggressively, which raises what the buyer can pay.

6. Working capital efficiency

Cash conversion cycle, days-sales-outstanding, inventory turnover. Businesses that don’t require large working capital investments to grow (or that generate negative working capital — customers pay before vendors are paid) command premium multiples. Distribution and specialty-retail businesses that require substantial inventory investment trade at lower relative multiples.

7. Capital expenditure requirements

Ongoing capex to maintain the business (replacement vehicles, machinery refresh, technology upgrades) reduces true free cash flow below reported SDE. Capex-light businesses (professional services, e-commerce, SaaS) command premium multiples versus capex-heavy businesses (manufacturing, transportation, medical practices with imaging equipment) at the same nominal SDE.

8. Workforce and key-employee stability

Long-tenured, key employees who intend to stay after transition (and ideally have contractual retention agreements) increase value. Businesses where the owner is the only person with critical knowledge, or where key employees have signaled departure, are discounted. Tenure and voluntary-turnover rates are diligence-standard metrics.

9. Market position and moat

A business with local brand recognition, exclusive supplier relationships, favorable long-term lease terms, or specialized certifications (contractor licenses, medical credentials, franchise territory rights) commands a premium. These are the closest thing a Main Street business has to a durable competitive moat.

When to use revenue multiples (and when not)

Revenue multiples get invoked whenever earnings are volatile, when the business is early-stage without stable profitability, or when a specific industry has developed a revenue-multiple convention that overrides the earnings-multiple default.

The industries where revenue multiples are the working reference:

• Professional services firms (accounting, law, consulting) — typically 0.9–1.4× annual revenue, with the higher end for firms with contracted retainer or recurring engagement revenue
• Medical and dental practices — typically 0.65–0.95× annual collections, adjusted for payer mix and provider count
• SaaS businesses — typically 3–7× annual recurring revenue (ARR), scaling with growth rate and retention
• Insurance agencies — typically 2.5–3.5× commission revenue
• Franchise resales — sometimes 40–60% of trailing-year revenue, subject to franchisor approval

For most other Main Street businesses, the revenue multiple is a sanity check only — the earnings multiple is what a buyer’s bank will underwrite against, and no deal closes at a price the buyer can’t finance.

The lower-middle-market break — why $2–5M EBITDA changes everything

Somewhere between $1M and $2M of EBITDA, the buyer universe fundamentally shifts. Below that threshold, the pool is individual searchers, small holdcos, ETA-fund partnerships, and family-office direct investments. Above it, the pool expands to include lower-middle-market private equity funds, family-office platform investments, and strategic acquirers running roll-ups.

The consequences of the buyer-pool shift are material:

This shift is why owner-operators who can grow their business past the $2M EBITDA threshold before selling frequently double or triple the sale value versus selling at $1M EBITDA. The same business at $2M EBITDA is often worth more than three times what it was worth at $1M EBITDA, because the multiple expands as the buyer pool expands. The Institute’s Family Business Succession Guide and Liquidity Event Playbook both address this threshold-crossing dynamic in depth.

Common buyer mistakes on valuation

1. Accepting the seller’s SDE without a build from source

Every SDE number from a broker or seller should be reconstructed from tax returns and bank statements before the buyer commits to a multiple. Add-backs that seem reasonable in a summary often shrink materially when the underlying documentation is reviewed.

2. Applying an industry multiple range to a below-average business

The 2.5–3.5× range is the middle 50% of transactions. A specific business at the bottom of the nine-driver scorecard should trade below the range, not within it. Buyers who anchor to the range middle systematically overpay for below-average businesses.

3. Underestimating post-close working capital needs

The purchase price does not include the working capital the business needs to operate. Many small-business acquisitions require $50K to $500K of additional working capital at close, funded either by the buyer’s equity or by the SBA lender. Failing to account for this converts a well-priced deal into a cash-crunch problem in month three.

4. Ignoring the owner-transition risk

A three-to-six-month transition period with the seller on-site as a paid consultant is standard for good reason: the concentrated knowledge of an owner-operated business does not transfer instantly. Deals that don’t include a transition arrangement, or where the seller is unwilling to commit to one, are riskier than the multiple suggests.

5. Confusing SDE with buyer take-home cash

SDE is the total economic benefit to a single owner-operator. Buyer take-home is SDE minus new debt service on the acquisition loan, minus the buyer’s own market-rate salary if the business needs to pay them one, minus reinvestment for growth. On a $1.1M acquisition at 2.75× $400K SDE, the buyer’s year-one take-home after servicing an SBA 7(a) loan may be $180K–$220K, not $400K.

The practitioner sequence — how Institute members actually value a business

The five-step framework the Institute recommends for any small-business valuation:

Step 1 — Build SDE from source documents.

Do not accept a broker’s SDE number. Rebuild from three years of tax returns and bank statements. Document every add-back with a source. Any add-back the seller cannot defend with documentation gets removed from the SDE number.

Step 2 — Establish the industry multiple range.

Use published broker data (BizBuySell Insight Report, IBBA Market Pulse, Pratt’s Stats), or engage a business appraiser for a target-industry comparable set. Establish the top, middle, and bottom of the current-market range for the specific industry and business size.

Step 3 — Score the nine drivers.

Systematically rate the specific business on the nine value drivers above. Use the +1 / 0 / −1 shortcut to develop a defensible position on where within the industry range this specific business belongs.

Step 4 — Model buyer take-home and financing feasibility.

Take the tentative purchase price. Model the acquisition financing (SBA 7(a) terms, seller note, buyer equity). Compute buyer year-one take-home after debt service and market-rate replacement salary. If buyer take-home is negative or de minimis at the tentative price, either the price is too high or the buyer needs to increase equity contribution.

Step 5 — Structure the offer around the price.

The headline price is one variable in a deal. Escrow, earn-out, seller note terms, working capital adjustment, transition period, non-compete duration, and buyer covenants all affect the effective purchase price. A price at the top of the range with a large seller note at 5% interest and a 30% earn-out based on next-year performance is often better for the buyer than a lower headline price with all-cash-at-close.

What moves the multiple — the summary

Two businesses with identical earnings can be worth very different amounts. The multiple rises with growth, recurring or contracted revenue, a diversified customer base, clean and verifiable books, and — most of all — independence from the owner. It falls with customer concentration, messy financials, declining sales, and a business that walks out the door when the seller does. Many of those same factors are exactly what you stress-test in diligence.