Sell My Business Calculator: How to Estimate What Your Company Is Worth in 2026

Almost every owner’s first question is the same: ‘What is my business worth if I sell it?’ And almost every owner wants the answer in minutes, not weeks. That’s why ‘sell my business calculator’ is one of the most-searched M&A queries on Google — people want a fast, free estimate before they commit to a real process.

The good news: a back-of-the-envelope calculator can get you within 20-30% of the actual sale price. The math is straightforward: take your trailing-twelve-month adjusted EBITDA, multiply by an industry-appropriate multiple, then adjust up or down for the factors a buyer will actually care about. You can do this in five minutes with our free calculator at ctacquisitions.com/survey.

The bad news: calculators are wrong all the time. They are wrong when sellers use the wrong EBITDA (book EBITDA instead of adjusted), the wrong multiple (a SaaS multiple for a services business), or ignore the discounts buyers will apply for owner dependence and customer concentration. Most online calculators give an inflated number because they don’t penalize for risk. The result: sellers go to market expecting $8M and get $5M offers.

This guide walks through the calculator framework honestly. What goes into the formula. What buyers actually pay for. When a free 5-minute estimate is enough, and when you need a $3-15k formal valuation. We finish with worked examples for three common lower-middle-market businesses (HVAC, SaaS, professional services) so you can sanity-check the number before you sit across from a buyer.

“A calculator gives you a number in five minutes. The market gives you a price in six months. The two should agree within 20% — if they don’t, something in your inputs is wrong.”

Key Takeaways

• The core formula: Adjusted EBITDA × industry multiple = enterprise value. Then adjust for cash, debt, and working capital to get equity value to the seller.
• Lower-middle-market multiples typically range 4-8x adjusted EBITDA. Below $1M EBITDA: 2-4x (Main Street). $1-5M EBITDA: 4-6x. $5-25M EBITDA: 6-10x. Over $25M EBITDA: 8-12x+.
• Free option: our calculator at https://ctacquisitions.com/survey/ takes 5 minutes and produces an estimated range. Useful for setting realistic expectations.
• Paid option: a formal valuation from a credentialed appraiser (BVR, CVA, ASA) costs $3-15k and is required for ESOPs, estate planning, partner buyouts, and litigation.
• Inputs that move you up: size, growth rate, recurring revenue, defensibility, management depth, clean financials.
• Inputs that move you down: owner dependence, customer concentration, declining market, capex intensity, undocumented add-backs.

What a ‘sell my business calculator’ actually does

Every credible calculator uses the same core formula. Adjusted EBITDA × industry multiple = enterprise value. Enterprise value + cash − debt = equity value to the seller. There is no secret sauce. Calculators differ in (a) how aggressively they let you adjust EBITDA, (b) what multiple they assign your industry, and (c) whether they penalize for risk factors. The math itself is identical across every tool on the market.

EBITDA is the starting point because it approximates cash flow. Earnings before interest, taxes, depreciation, and amortization. It strips out financing decisions (interest), tax structure (which changes by entity type), and non-cash charges (depreciation, amortization). What’s left is roughly the cash the business generates from operations — the number a buyer cares about. Buyers don’t care about your tax bill or your depreciation schedule; they care about whether the business will throw off cash they can use to service debt and earn returns.

Multiples translate cash flow into a purchase price. If a buyer pays 5x EBITDA, they expect to recover the purchase price in about 5 years of cash flow (before financing). Higher multiples mean buyers expect faster recovery, lower risk, or higher growth. Lower multiples mean buyers see more risk or slower growth. Multiples are set by the market — they emerge from thousands of completed transactions in each industry and size range.

The free version of this exercise lives at ctacquisitions.com/survey. We built the survey for owners who want a fast estimate before deciding whether to pursue a sale. You answer 10-15 questions (industry, revenue, EBITDA, growth, recurring revenue percentage, customer concentration, owner involvement) and get an estimated value range. Free. No follow-up unless you ask. The estimate is most useful as a sanity check — if your gut says the business is worth $10M and the calculator says $4-6M, something needs explaining before you go to market.

Step 1: calculate adjusted EBITDA correctly

Start with your tax-return EBITDA, then add back legitimate adjustments. Adjusted EBITDA = book EBITDA + owner’s excess compensation + non-recurring expenses + personal expenses run through the business + non-arm’s-length rent adjustments. Each add-back must be defensible — meaning a buyer’s quality-of-earnings (QoE) accountant will scrutinize every line. Aggressive add-backs that get rejected during diligence are the #1 reason deals retrade lower.

Owner compensation is the largest typical add-back. Most owners pay themselves above market rate to minimize taxes. If you pay yourself $400k and a hired CEO would cost $200k, you can add back $200k as ‘excess owner compensation.’ This is the most common, most legitimate adjustment. Buyers will accept it if you can document it (W-2s, comparable salary surveys, BLS data for your industry/region).

Non-recurring expenses are the second-largest category. One-time legal fees, a 2024 lawsuit settlement, a roof repair, a failed software migration. These are real expenses but won’t recur for a buyer. Document each one with invoices and explanation. Buyers typically accept 80-90% of well-documented non-recurring add-backs.

Personal expenses run through the business are common but risky. Country club, personal vehicle, family member on payroll, personal travel. These are legitimate add-backs if they were genuinely personal — but the IRS treatment vs. the M&A treatment can differ. Some buyers haircut personal-expense add-backs by 20-50% because they’re harder to verify. See our adjusted EBITDA add-backs guide for the full list of accepted vs. rejected add-backs.

Aspirational add-backs are the fastest way to lose buyer trust. ‘If we cut our marketing spend, EBITDA would be $200k higher.’ ‘If the new owner moves us to a smaller office, we save $100k.’ These are not real add-backs — they’re hypothetical future cost savings, and buyers will value them at zero. Worse, listing aspirational add-backs in your CIM signals to buyers that your other add-backs may also be unreliable. Stick to documented, defensible, non-recurring or non-business expenses.

Your TTM (trailing-twelve-month) EBITDA is the market’s reference point, not last fiscal year’s. Buyers underwrite off TTM at the time of LOI — usually 12 months ending the most recent month-close. If your business is growing, TTM is higher than last fiscal year. If declining, TTM is lower. Make sure your free calculator inputs reflect TTM, not stale annual numbers. Run it at ctacquisitions.com/survey using your most recent rolling-twelve-month adjusted EBITDA for the most accurate estimate.

Step 2: pick the right multiple for your industry and size

Multiples are mostly a function of size and industry. Size dominates. A $500k EBITDA HVAC business trades at 2-3x. A $5M EBITDA HVAC business trades at 6-8x. Same industry, different multiple, because larger businesses are more diversified, more institutional, and more attractive to PE buyers. The size premium is real and shows up in every industry.

Industry adjusts the size multiple up or down. Recurring-revenue businesses (SaaS, MSPs, subscription services) trade higher than one-time-revenue businesses (project-based contractors, custom manufacturing). High-margin businesses trade higher than low-margin businesses. Asset-light businesses trade higher than capex-intensive businesses. Defensible businesses (proprietary tech, brand, contracts) trade higher than commoditized businesses.

Typical 2026 multiple ranges by EBITDA size. Under $500k EBITDA (Main Street): 2-3.5x. $500k-$1M EBITDA: 3-4.5x. $1M-$3M EBITDA: 4-6x. $3M-$10M EBITDA: 5-8x. $10M-$25M EBITDA: 6-10x. Over $25M EBITDA: 8-12x+. These are general ranges — specific industries can be higher or lower.

Industry-specific overlays. SaaS with strong NRR: 1.5-2x premium over base. Recurring-service businesses (HVAC service contracts, MSP managed services): 1-1.5x premium. Highly regulated services (law firms, CPA firms with limited transferability): 0.5-1x discount. Capex-heavy manufacturing: 0.5-1x discount. Specialty distribution: at base. The calculator at ctacquisitions.com/survey applies these overlays automatically based on the industry you select.

Step 3: adjust the multiple up or down based on real risk factors

Once you have the base multiple, the calculator should adjust it for the factors buyers price into every deal. These adjustments are where most online calculators fail — they give you a flat industry multiple without penalizing for the risks a real buyer will identify in diligence. The result: an inflated number that disappoints when the LOIs come in. Our calculator at ctacquisitions.com/survey applies plus/minus adjustments for each of the factors below.

Factors that move the multiple up. Recurring revenue over 50% of total: +0.5-1.5x. Annual revenue growth over 15%: +0.5-1.0x. Customer concentration with no customer over 10%: +0.5x. Strong management team independent of owner: +0.5-1.0x. Multi-year customer contracts: +0.5-1.0x. Proprietary tech, brand, or process: +0.5-1.5x. Clean GAAP financials with audit history: +0.25-0.5x.

Factors that move the multiple down. Owner dependence (owner involved in sales, key customer relationships, daily operations): -0.5-2.0x. Customer concentration (one customer over 25%): -0.5-1.5x. Customer concentration (one customer over 50%): -1.5-3.0x. Declining or flat revenue: -0.5-1.0x. High capex requirements: -0.25-0.75x. Pending litigation, regulatory issues, environmental exposure: -0.5-2.0x. Cash-basis or unaudited financials: -0.25-0.75x.

The math: cumulative adjustments rarely exceed +/- 2.5x. Even a business with multiple positive factors and minimal negative factors won’t move the multiple by 4-5 turns. The size band is the dominant factor; risk adjustments are second-order. A $3M EBITDA business with a 5x base multiple won’t become a 10x business no matter how good the risk profile. It might become a 6.5-7x business at the top of its size band — that’s the realistic ceiling.

Step 4: convert enterprise value to equity value (the number you actually receive)

Enterprise value is not what hits your bank account. Enterprise value (EV) is the value of the business’s operations, independent of how it’s financed. To get equity value (EqV) — the actual proceeds to the seller — you adjust for cash, debt, and working capital. Most online calculators stop at EV and let owners assume they’ll receive that number in cash. They won’t.

The bridge from EV to equity proceeds. Equity value = Enterprise value + cash on the balance sheet − interest-bearing debt − working-capital shortfall (if any) − transaction expenses. In a typical $5M EV deal: maybe $200k cash retained, $500k debt paid off, $0 working-capital adjustment, $250k transaction expenses (broker, legal, QoE) = $4.45M equity value to the seller before taxes.

Working capital is the most-overlooked adjustment. Buyers expect a ‘normal’ level of working capital to come with the business. If your AR is unusually high or your AP is unusually low at close, buyers will demand a working-capital true-up. The peg is set during the LOI and reconciled at close. A working-capital shortfall directly reduces equity proceeds. See our working-capital guide (in related guides) for how the peg is calculated.

Then subtract taxes to get net proceeds. Federal long-term capital gains: 20% (above $500k taxable income for joint filers in 2026). State capital gains: 0-13.3% depending on state. Net Investment Income Tax (NIIT): 3.8% on most M&A gains. Total tax on a $4.5M gain in California: roughly 35-37% = $1.65M, leaving net proceeds of about $2.85M. Asset sales are typically taxed harder than stock sales for sellers; see our asset vs stock sale guide for details.

Three worked examples: HVAC, SaaS, and professional services

Example 1: $2.5M revenue HVAC service-and-installation business in Texas. Owner draws $250k. Hired manager would cost $130k. Service contracts are 35% of revenue, project work is 65%. No customer over 8% of revenue. Owner involved in sales but not daily operations. Book EBITDA: $400k. Add-backs: $120k owner excess compensation, $40k personal expenses, $20k one-time legal = $180k add-backs. Adjusted EBITDA: $580k. Base multiple at $580k EBITDA: 3.5-4.0x. Recurring service-contract premium: +0.25x. Owner-involvement discount: -0.25x. Net multiple: 3.5-4.0x. Estimated EV: $2.0-2.3M. Equity value (no debt, $50k cash retained): $2.05-2.35M. Net after tax (Texas, no state income tax): roughly $1.65-1.85M.

Example 2: $4M ARR vertical SaaS with 110% NRR and 25% growth. Two co-founders, each earning $200k. Replacement cost: $180k each. Gross margin 78%. Customer concentration: largest customer 12% of revenue. Recurring revenue: 100%. Growth: 25% YoY. Book EBITDA: $400k (heavy R&D investment depresses margin). Add-backs: $40k owner excess comp + $30k one-time recruiting fees = $70k. Adjusted EBITDA: $470k. SaaS at this scale and growth often values on revenue multiples instead of EBITDA: 3-5x ARR = $12-20M EV. EBITDA-based check: $470k EBITDA × 12-15x SaaS multiple = $5.6-7.0M (lower because EBITDA is depressed by growth investment). The revenue multiple is the right one here. Estimated EV: $14-18M. Equity value: similar (assume minimal debt). Significant tax exposure for two founders.

Example 3: $6M revenue regional CPA firm. Three partners, each earning $400k base + $150k bonus. Replacement cost: $250k each. Recurring revenue (annual tax + monthly bookkeeping): 80% of total. Customer base: 800 clients, no customer over 2%. Book EBITDA: $800k. Add-backs: $450k partner excess comp ($150k per partner × 3) + $50k personal expenses = $500k. Adjusted EBITDA: $1.3M. Base multiple for $1.3M EBITDA professional services: 4.5-5.5x. Recurring revenue premium: +0.5x. Customer diversification: +0.25x. Partner-dependence and transferability discount (clients may follow partners, not the firm): -1.0x. Net multiple: 4.0-5.5x. Estimated EV: $5.2-7.2M. Significant earnouts likely (clients are sticky to relationships, not firms). Estimated cash at close: 60-75% of EV. Run your own numbers at ctacquisitions.com/survey.

What the examples show. Same basic formula, three very different outcomes. The HVAC business sits in the lower-mid range because its EBITDA is small and the work is partly project-based. The SaaS business commands a revenue multiple because its growth and recurring revenue make EBITDA the wrong metric. The CPA firm faces a transferability discount that’s industry-specific. A calculator that gives all three the same multiple is wrong. Use a tool that adjusts for industry, size, and risk.

Free calculator vs. paid formal valuation: which do you need?

Free 5-minute calculator: enough for 80% of sellers. If you’re considering a sale to a strategic, PE buyer, or family office, the market sets the price — not an appraiser. A free calculator like ctacquisitions.com/survey tells you whether your expectations are realistic before you spend $50-200k on a sale process. If the calculator says $5-7M and your number is $10M, the gap needs explaining. If the calculator says $5-7M and your number is $6M, you’re probably ready for an LOI.

Paid formal valuation: required in specific situations. ESOP transactions: required by ERISA, performed annually by an independent appraiser ($10-30k initial, $5-15k annual). Gift and estate planning: required by IRS, performed by a credentialed appraiser ($5-15k). Partner buyouts: required by buy-sell agreements ($3-10k). Divorce: required by court ($5-25k depending on contention). Litigation: required as expert testimony ($15-50k+). For these situations, an arms-length sale calculator is not enough — you need a credentialed valuation.

Credentials to look for in a paid valuation. ASA (Accredited Senior Appraiser, American Society of Appraisers). CVA (Certified Valuation Analyst, NACVA). ABV (Accredited in Business Valuation, AICPA). ASA-BV is the gold standard for litigation; CVA is the most common for small business transactions; ABV is held by CPAs who specialize in valuation. BVR (Business Valuation Resources) publishes industry data many appraisers use. Avoid ‘valuation services’ without credentials — their reports won’t hold up in court or with the IRS.

What a paid valuation gives you that a free calculator can’t. (1) A defensible report (typically 50-150 pages) for tax, legal, or court purposes. (2) Three valuation approaches reconciled (income, market, asset). (3) Discounted-cash-flow analysis with explicit assumptions. (4) Comparable transaction analysis with specific deals. (5) Discount for lack of marketability (DLOM) and discount for lack of control (DLOC) where applicable. (6) Expert testimony in litigation. For an arms-length sale to a real buyer, none of this matters — the buyer’s offer is the price. For ESOPs, gifts, divorce, or court, all of it matters.

Common mistakes that produce inflated calculator estimates

Mistake 1: using book EBITDA without normalizing add-backs. Book EBITDA is what shows up on your tax return. It’s usually too low because owner compensation, personal expenses, and one-time costs depress it. Add-backs raise the number to a normalized level. Conversely, some sellers add back too aggressively, which inflates the multiple input. The right adjusted EBITDA is the one a QoE accountant will defend — not the highest one you can justify on a spreadsheet.

Mistake 2: applying a SaaS or tech multiple to a services business. A 12x multiple looks great on a calculator until you realize it doesn’t apply to a $3M EBITDA distribution business. Pick the multiple that matches your actual industry, not the one you’d like. SaaS multiples (8-15x EBITDA, 3-7x revenue) don’t apply to project-based services or capex-heavy manufacturing.

Mistake 3: ignoring owner dependence. If you do most of the sales calls, hold the key customer relationships, or are the technical expert who solves hard problems, your business is owner-dependent. Buyers heavily discount owner-dependent businesses. A 5.5x multiple might become 3.5-4x once owner dependence is priced in. Calculators that don’t ask about owner involvement give inflated numbers.

Mistake 4: ignoring customer concentration. If one customer is 30%+ of revenue, the multiple gets cut by 1-3 turns — and some buyers walk away entirely. See our customer concentration guide for the math. A calculator that shows you 6x without asking about your top customer is incomplete.

Mistake 5: confusing enterprise value with equity proceeds. EV is the price of the business; equity proceeds are what you receive. Subtracting debt and working-capital shortfalls and transaction expenses can reduce equity proceeds by 10-20% from EV. Then taxes take another 25-37%. The cash that hits your bank account is typically 50-65% of the headline EV in a healthy lower-middle-market deal.

Mistake 6: using a calculator built for the wrong size segment. Some online calculators are built for Main Street businesses (under $500k EBITDA) and apply 2-3x multiples regardless of size. Others are built for SaaS and apply 8-15x EBITDA multiples regardless of growth. Make sure the calculator you use is appropriate for your size band. Our tool at ctacquisitions.com/survey auto-detects size band based on EBITDA input and applies the right base multiple before layering industry and risk overlays.

Mistake 7: assuming the calculator answer is the negotiated price. The calculator gives an estimated value range. The market produces an actual price — one that emerges from a real auction process with multiple buyers, due diligence, and negotiation. Even with perfect inputs, the calculator and the final price will differ by 10-25% in either direction. Use the calculator to know whether you’re in the right ballpark before investing months in a sale process. Don’t use it as a price-setting tool for negotiations — that’s what your M&A advisor and a competitive process are for.

Conclusion

A ‘sell my business calculator’ is a sanity check, not a price tag. The formula is simple: adjusted EBITDA × industry multiple, then plus/minus adjustments for size, growth, recurring revenue, owner dependence, and customer concentration. The free version at ctacquisitions.com/survey takes five minutes and gets you within 20-30% of where the market will land. The paid version (a $3-15k formal valuation from an ASA-, CVA-, or ABV-credentialed appraiser) is necessary for ESOPs, gift/estate, partner buyouts, divorce, and litigation — but unnecessary for most arms-length sales. The number a calculator gives you is a starting point. The actual price comes from a buyer who has read the CIM, completed diligence, and signed an LOI. The closer your calculator estimate is to a real buyer’s offer, the better your inputs were — and the better-prepared you are to negotiate the next 5% rather than discover you were 30% off and have to start over.

Frequently Asked Questions

What is the basic formula for a sell my business calculator?

Adjusted EBITDA × industry multiple = enterprise value. Then enterprise value + cash − debt − working-capital shortfall − transaction expenses = equity value to the seller. After capital-gains tax (typically 25-37% combined federal + state + NIIT), the result is net proceeds. Most online calculators only show enterprise value, which is why owners are surprised when they see net proceeds.

Where can I find a free sell my business calculator?

We offer a free calculator at ctacquisitions.com/survey. It takes about 5 minutes, asks 10-15 questions about your business (industry, revenue, EBITDA, growth, recurring revenue, customer concentration, owner involvement), and produces an estimated value range. No follow-up unless you ask. There are other free calculators online — just be sure they adjust for risk factors, not just industry averages.

How accurate is a free sell my business calculator?

Typically within 20-30% of an actual sale price for owners who input accurate adjusted EBITDA and answer risk questions honestly. The biggest sources of error are (1) using book EBITDA instead of adjusted, (2) over-aggressive add-backs that won’t survive QoE, (3) under-stating owner dependence, and (4) ignoring customer concentration. With clean inputs the estimate is usable as a sanity check before a sale process.

When should I pay for a formal business valuation?

When you need a defensible report for tax, legal, or court purposes. Required for: ESOP transactions (annually), gift and estate planning (IRS-required), partner buyouts (buy-sell agreement), divorce (court), and litigation (expert testimony). Not required for arms-length sales to strategic, PE, or search-fund buyers — the market sets the price.

How much does a formal business valuation cost?

$3,000-$15,000 for a small to lower-middle-market business from a CVA-, ASA-, or ABV-credentialed appraiser. ESOP valuations: $10-30k initial, $5-15k annually. Litigation valuations: $15-50k+ depending on complexity. Divorce valuations: $5-25k depending on contention. The fee scales with complexity, deal size, and the level of defensibility required.

What credentials should I look for in a business appraiser?

ASA (Accredited Senior Appraiser, American Society of Appraisers), CVA (Certified Valuation Analyst, NACVA), and ABV (Accredited in Business Valuation, AICPA) are the three main credentials. ASA is the gold standard for litigation; CVA is most common for small business; ABV is held by CPAs specializing in valuation. Avoid anyone offering ‘valuation services’ without one of these credentials.

What multiple should I use in the calculator for my business?

Multiples scale with size and adjust for industry. Under $1M EBITDA: 2-4.5x. $1-3M EBITDA: 4-6x. $3-10M EBITDA: 5-8x. $10-25M EBITDA: 6-10x. Over $25M: 8-12x+. Then apply industry overlays (SaaS premium, recurring-revenue premium, capex-heavy discount) and risk adjustments (owner dependence, customer concentration, growth rate). Our calculator at ctacquisitions.com/survey applies these automatically.

What is the difference between adjusted EBITDA and book EBITDA?

Book EBITDA is what appears on your tax return or financial statements. Adjusted EBITDA adds back legitimate non-recurring or non-business expenses: owner’s excess compensation, personal expenses run through the business, one-time costs (lawsuit settlement, failed software project), and non-arm’s-length rent. Adjusted EBITDA is typically 20-50% higher than book EBITDA. Buyers value the business off adjusted EBITDA, but only after their QoE accountant verifies each add-back.

How do I know if my add-backs will be accepted by a buyer?

Acceptable add-backs are documented, defensible, and clearly non-recurring or non-business. Owner excess compensation (with comparable salary data): 90%+ accepted. One-time legal/professional fees (with invoices): 80-90% accepted. Personal expenses run through the business: 60-80% accepted with documentation. Discretionary or aspirational add-backs (‘we plan to cut costs’): 0-30% accepted. The QoE process verifies every line.

What factors increase my business’s multiple?

Recurring revenue over 50% of total (+0.5-1.5x). Annual growth over 15% (+0.5-1.0x). No customer over 10% of revenue (+0.5x). Strong management team independent of owner (+0.5-1.0x). Multi-year customer contracts (+0.5-1.0x). Proprietary tech, brand, or process (+0.5-1.5x). Clean GAAP financials with audit history (+0.25-0.5x). The combination rarely exceeds +2.5x off the size-band base.

What factors decrease my business’s multiple?

Owner dependence (-0.5-2.0x). One customer over 25% of revenue (-0.5-1.5x). One customer over 50% of revenue (-1.5-3.0x). Declining or flat revenue (-0.5-1.0x). High capex requirements (-0.25-0.75x). Pending litigation, regulatory issues, environmental exposure (-0.5-2.0x). Cash-basis or unaudited financials (-0.25-0.75x). The combination can easily exceed -2.5x and push a business into unsellable territory.

How long does it take to actually sell a business after I run a calculator?

Typical lower-middle-market timeline: 6-12 months from engagement to close. Month 0-1: prep CIM, gather diligence materials. Month 1-3: outreach to 30-100 buyers, NDAs, IOIs. Month 3-5: management meetings, LOI negotiation. Month 5-8: due diligence (financial QoE, legal, commercial). Month 8-10: definitive purchase agreement negotiation. Month 10-12: signing and closing. Calculators take 5 minutes; sale processes take a year. The calculator helps you decide whether the year is worth it.

About the Author

Christoph Totter is the founder of CT Acquisitions, a buy-side deal origination firm headquartered in Sheridan, Wyoming. CT Acquisitions sources founder-led businesses for 75+ private equity firms, family offices, and search funds across the U.S. lower middle market ($1M–$25M EBITDA). Christoph writes about M&A from the perspective of someone on the phone with both sides of the deal table every week. Connect on LinkedIn · Get in touch