How to Value a Small Business for Acquisition

Most small business listings are priced by brokers using a multiple of earnings. The question isn't whether that's the right methodology (it usually is). The question is whether the earnings figure underneath that multiple is accurate.

Get the earnings figure right and the rest of the math follows. Get it wrong and you're building a deal structure on a foundation someone else fabricated.

This is a working guide to small business valuation: how the metrics work, what the numbers mean, where sellers and brokers introduce fiction into the calculation, and how to identify deals that are mispriced in either direction.

SDE vs EBITDA: Which One Matters and When

The two most common earnings metrics in small business acquisitions are SDE (Seller's Discretionary Earnings) and EBITDA (Earnings Before Interest, Taxes, Depreciation, and Amortization). They're often used interchangeably in casual conversation. They aren't the same thing, and using the wrong one will produce a wrong valuation.

SDE: The Owner-Operator Standard

SDE is the total economic benefit to a single full-time owner-operator. It starts with net income and adds back:

• Owner's salary and benefits (what the owner pays themselves)
• Owner's personal expenses run through the business
• Depreciation and amortization (non-cash charges)
• Interest expense (debt-dependent, not operational)
• One-time or non-recurring items (lawsuit settlement, one-time equipment purchase)

The logic: if you're buying this business to run it yourself, SDE represents the total cash benefit available to you before you service any acquisition debt.

SDE is the standard for small businesses where the owner is deeply involved in day-to-day operations, typically businesses under $5M in revenue (sometimes up to $10M). It's the metric your SBA lender will use for underwriting. It's what determines whether the deal DSCR passes or fails.

EBITDA: The Institutional Standard

EBITDA is earnings before interest, taxes, depreciation, and amortization. It doesn't add back the owner's salary because it assumes the business already has a management team in place, or that you'll need to hire one.

EBITDA is the right metric when the owner isn't an operating employee, or when the deal is large enough that professional management was already in place before the acquisition. It's used by private equity firms, middle-market buyers, and search funds targeting larger deals.

The rule of thumb: if the business needs the buyer to show up to work every day, use SDE. If the business runs without the owner and you're buying a management team, use EBITDA.

For self-funded searchers targeting SBA-eligible deals ($800K to $5M asking price), SDE is almost always the operative metric. You'll see EBITDA on listings, but the SBA underwriting will convert to SDE.

How Add-Backs Work (and Where They Go Wrong)

Add-backs are the adjustments that get you from reported net income to SDE. Done honestly, they reflect legitimate non-operating costs. Done creatively, they're how a $200K business gets presented as a $400K business.

Legitimate Add-Backs

• Owner compensation. Salary, health insurance, retirement contributions, vehicle allowances. All legitimate. The new owner will replace these with their own compensation structure.
• Depreciation and amortization. Non-cash charges. Add them back because they don't affect cash flow.
• Interest expense. The acquisition debt structure will be different from the seller's. Add it back to get to the operating economics of the business.
• One-time expenses with documentation. A legal settlement that's resolved, a one-time equipment repair, a non-recurring marketing campaign. Legitimate only if documented and truly non-recurring.
• Family member salaries above market rate. If the owner is paying their spouse $150K to answer phones, the portion above market rate is an add-back.

Aggressive Add-Backs (Red Flags)

• Recurring expenses labeled "one-time." If equipment breaks every two years and the most recent repair is being added back, that's a capital maintenance cycle masquerading as a one-time hit.
• Owner salary set artificially low to inflate SDE. If the owner is taking $60K in salary from a business that needs a full-time operator worth $120K, the SDE is overstated by $60K.
• Inflated personal expenses through the business. Personal travel, meals, and entertainment that aren't clearly documented as business expenses. Ask for backup.
• Adjusted add-backs that can't be tied to tax returns. If the P&L says one number and the tax return says another, ask which is accurate. The answer reveals the culture of the financials.

The test for any add-back: would a reasonable person running this business incur this expense? If yes, it stays. If it's specific to the current owner's lifestyle or choices, it's suspect.

Typical Acquisition Multiples

Small businesses sell at 2 to 4x SDE in most cases. That range is wide enough to be nearly useless on its own. What moves a business within that range (or outside of it) is what matters.

Factors That Push the Multiple Higher

• Recurring revenue. Contracted, subscription, or repeat customers create predictability. A pest control company with annual service contracts commands a premium over one that's purely transactional.
• Absentee or minimal owner involvement. If the business runs without the owner, a buyer is paying for a cash-flowing asset, not a job. That's worth more.
• Growing revenue trend. Three years of 10 to 15% year-over-year growth justifies a higher multiple than flat revenue. The buyer is buying future earnings, not just historical ones.
• Clean books with tax-return-verifiable numbers. Sellers who file their actual income (and pay taxes on it) present less verification risk. That reduces buyer risk and supports a higher price.
• Strong management team in place. A business that has a GM, operations manager, and sales team doesn't require the buyer to backfill multiple roles on day one.
• Long customer tenure. Average customer relationship of 5+ years indicates low churn and sticky value delivery.

Factors That Push the Multiple Lower

• High owner-dependence. If the owner is the primary customer relationship, the main technical skill, and the daily decision-maker, you're buying a job. The business's earnings may not survive the transition without heavy investment.
• Customer concentration. When one or two customers represent 30 to 40% of revenue, the DSCR calculation should include a downside scenario where that customer leaves. The multiple should reflect that risk.
• Declining revenue. A business earning $400K SDE in 2023 and $340K in 2025 is a different asset than a stable one. The multiple should drop accordingly, and so should the SDE figure you use in the calculation.
• Industry tailwinds are negative. Print shops, certain retail categories, businesses exposed to AI disruption. Industry decline doesn't make a deal undoable, but it affects the premium you should pay.
• Key-person risk in employees. If the lead technician, sales rep, or office manager walks when the owner leaves, that's a material operational risk.

Multiple by Business Type

General ranges by category. These are directional, not definitive:

• Main street retail / simple service: 1.5 to 2.5x SDE. High owner involvement, transactional revenue, limited defensibility.
• B2B services (landscaping, cleaning, HVAC, staffing): 2.5 to 3.5x SDE. Recurring client relationships, predictable demand, transferable.
• Professional services (accounting, insurance, consulting): 2.5 to 4x SDE. Depends heavily on whether clients follow the owner or the firm.
• Recurring revenue / SaaS-like businesses: 3.5 to 5x SDE. Premium for predictability and lower churn.
• Manufacturing / niche industrial: 3 to 5x SDE. Depends on equipment condition, proprietary processes, and customer relationships.

Anything above 4.5x SDE with SBA financing requires exceptional justification. The DSCR math gets very tight at those multiples with a standard 10% down payment.

Normalizing Financials

Normalization is the process of adjusting historical financials to reflect the true economic performance of the business: removing owner-specific decisions, one-time events, and accounting choices that distort the picture.

The normalization process, step by step:

1. Start with the tax return, not the P&L. The P&L is the broker's document. The tax return is what the seller swore to under penalty of perjury. If they diverge, find out why before you model anything.
2. Identify and add back legitimate owner items. Owner salary, benefits, and personal expenses run through the business. Document each one.
3. Add back non-cash charges. Depreciation and amortization.
4. Add back interest expense. You'll replace the seller's debt structure with your own.
5. Scrutinize one-time items. Request supporting documentation for anything labeled non-recurring. A $50K legal settlement from a resolved lawsuit is a legitimate add-back. A "one-time" marketing spend that happens every other year is not.
6. Adjust owner salary to market rate. If the owner is underpaying themselves to inflate SDE, or overpaying themselves relative to what the role would cost to hire, adjust to fair market compensation for that role.
7. Look at three years, not one. A business that earned $500K SDE in 2023 but $380K in both 2024 and 2025 is a $380K business, not a $500K one. Use a weighted average or the most recent year, depending on what the trend tells you.

After normalization, you have the SDE figure you'll use for both the multiple calculation and the DSCR calculation. Use it consistently throughout your analysis.

Worked Example: The Math on a $2M Asking Price

A listing hits your feed: $2M asking price, $550K SDE (as stated). Let's run the numbers.

Step 1: Calculate the Multiple

Multiple = Asking Price ÷ SDE = $2,000,000 ÷ $550,000 = 3.6x. That's in the reasonable range for a well-run service business.

Step 2: Normalize the SDE

You review the financials and find the following in the add-backs:

• Owner salary: $120,000 (legitimate)
• Owner health insurance: $18,000 (legitimate)
• Depreciation: $35,000 (legitimate)
• Interest expense: $22,000 (legitimate)
• "One-time" equipment repair: $45,000 (you ask for documentation; this has happened twice in three years)
• Owner's vehicle lease: $18,000 (legitimate if used for business)
• Owner's personal travel labeled as "client entertainment": $24,000 (no client documentation)

Total stated add-backs: $282,000. The $45,000 equipment repair is recurring, not one-time, so remove it from the add-back. The $24,000 "client entertainment" without documentation is suspect, so remove it too.

Adjusted SDE: $550,000 − $45,000 − $24,000 = $481,000.

Step 3: Recalculate the Multiple

$2,000,000 ÷ $481,000 = 4.2x. Still within range for the right business, but meaningfully different from 3.6x. The story changed.

Step 4: Run the DSCR

Assume 10% down ($200K), 10% seller note ($200K), SBA loan of $1.6M at 10.5% over 10 years, seller note at 6% over 5 years.

• SBA monthly payment on $1.6M: approximately $21,700/mo = $260,400/year
• Seller note monthly payment on $200K: approximately $3,867/mo = $46,400/year
• Total annual debt service: $306,800
• DSCR = $481,000 ÷ $306,800 = 1.57x

1.57x clears the SBA minimum of 1.25x and lands in the "good" range. This deal can get financed, but there isn't a lot of margin for revenue underperformance.

You can model any scenario in the free SBA loan calculator. Change the asking price, down payment, or SDE and see exactly how the DSCR and deal structure shift.

Identifying Overpriced Deals

Most listings at any given time are overpriced. The math says so. Sellers anchor to peak earnings years. Brokers price optimistically to create negotiating room. The market clears at lower prices than the ask, or doesn't clear at all (the average time on market for small business listings is 6 to 18 months).

Signs a deal is overpriced:

• Multiple based on peak year earnings. A business that earned $600K SDE in 2022 and $380K in 2025 being priced at 4x the 2022 number. That's a 2022 price. They're dreaming.
• Add-backs that don't survive scrutiny. Inflated SDE from aggressive add-backs means the stated multiple is artificially compressed. The real multiple, after normalization, may be 5x+ on actual cash flow.
• DSCR fails at stated price. Run the numbers at the asking price with standard SBA terms. If DSCR comes in below 1.25x, the deal doesn't qualify for SBA financing at that price. The price needs to come down, the down payment needs to go up, or both.
• Premium multiple without premium characteristics. Asking 4x SDE on a single-owner-operated business with transactional revenue and customer concentration. The multiple implies institutional quality that the operations don't support.
• Time on market. Listings that have been sitting for 12+ months weren't priced to sell. Either the seller isn't serious or the price is too high for the deal to pencil for buyers.

The right response to an overpriced deal is to understand why it's overpriced and whether there's a price at which it works. If the business is fundamentally sound but the asking price is based on an inflated SDE, there may be a deal at the right number.

Identifying Underpriced Deals

Underpriced deals exist. They're uncommon, but they're not rare, especially among sellers who prioritize speed and certainty over maximum price, or who have undervalued a business characteristic that a particular buyer can capitalize on.

Signals to look for:

• Multiple below 2x on a stable, recurring-revenue business. At 1.8x SDE with documented clean books, ask why. Motivated seller, estate situation, or a business with a solvable problem the current owner couldn't address.
• Revenue trend understating future earnings. A business that added a major contract in the last 6 months may be valued on trailing twelve months that don't reflect the current run rate. A forward-looking SDE can be materially higher.
• Owner salary inflated above market. If the owner is paying themselves $300K to run a business that could be managed for $150K, the true SDE available to a buyer is higher than stated. Adjust accordingly.
• Operational inefficiencies with clear fixes. A business with a known, fixable cost problem (outdated vendor contracts, manual processes, overstaffing in one area) may be priced on current margins when post-fix margins are significantly better.
• Geographic or market expansion potential not priced in. A pest control business that only operates in one county in a metro area could expand. That optionality has value that doesn't show in the trailing P&L.

The distinction between "underpriced" and "broken" matters. Underpriced deals have identifiable reasons for the discount that can be resolved. Broken deals have structural problems (customer concentration, key-person dependence, declining markets) that explain why no one else is buying them.

From Valuation to Offer Price

Valuation gives you a range. Offer price is where you land in that range based on your conviction in the normalized earnings, the DSCR math, and your assessment of risk.

A practical framework:

1. Calculate your walk-away price. The maximum asking price at which the deal produces a DSCR of at least 1.25x with your target down payment and deal structure. Above that number, the SBA loan doesn't qualify and the deal doesn't close without a larger equity injection.
2. Anchor your offer to normalized SDE. If the stated SDE doesn't survive normalization, your offer should be based on what you believe the real number is, not what the broker claims.
3. Price in the risks. Customer concentration, owner-dependence, revenue trend. Each of these should compress the multiple you're willing to pay. If you're taking on more risk, you need more return.
4. Use seller notes as a bridge. If the seller is asking $2.2M but the deal pencils at $2M with 10% down, a $200K seller note at a favorable rate may close that gap in a way that works for both sides.
5. Leave room for working capital. The purchase price funds the acquisition. You'll need separate capital for working capital, typically 1 to 2 months of operating expenses. Build that into your total cash requirement, not just the down payment.

For the full picture on how DSCR interacts with deal structure, see what is DSCR. For SBA financing mechanics that affect how you can structure the deal, see the SBA 7(a) loan guide.

The Multiple That Breaks Deals

At 10% down and standard SBA terms, the math on deal financing produces a ceiling multiple of roughly 4 to 4.5x SDE before DSCR starts failing. The exact number depends on the SDE amount and current interest rates. Higher SDE gives more room; higher rates compress it.

This is a hard constraint. If you're modeling deals at 5x SDE with 10% down, you need to understand that you're either not getting financed, increasing your down payment significantly, or paying below-market rates on seller financing to make the debt service work.

Sellers who insist on 5x+ multiples for main-street businesses are asking for something the SBA loan structure won't support for most buyers. They want the price they want; the financing math doesn't change to accommodate them. Either they wait for a cash buyer, the multiple comes down, or the deal doesn't close. The arithmetic is the arithmetic.

Use the free SBA loan calculator to run your own scenarios. Plug in any asking price, SDE, and deal structure and see exactly where the DSCR lands. It takes about two minutes and will tell you more than any rule of thumb.

Summary: What Actually Matters

Small business valuation comes down to three things:

1. Normalized SDE. The actual earnings available to a buyer after removing owner-specific add-backs that won't survive scrutiny, adjusting owner compensation to market, and using the earnings trend (not the peak year) as the baseline.
2. Multiple relative to business quality. A 3x multiple on a business with recurring revenue, absentee management, and growing margins is a good deal. A 3x multiple on a business with owner-dependence, customer concentration, and flat revenue is a different risk profile entirely.
3. DSCR at your deal structure. All of the above is context. The deal works or it doesn't based on whether the normalized SDE can service the debt you'll take on to buy it. That number has to clear 1.25x minimum. Comfortable deals clear 1.5x+.

For a complete guide to the acquisition process, from sourcing through closing, see how to buy a small business. For a detailed framework to validate what's in a CIM before you commit to deeper analysis, see how to read a CIM.