How to Value a Small Business in the US

Most owners find out what their company is worth twice: once when they guess, and once when a buyer’s accountant runs the actual numbers. The gap between those two figures is rarely small. An owner who spent a decade building the business tends to value the hours, the risk, and the sacrifice that went into it. A buyer values the cash flow that survives after the owner walks out the door. Neither view is wrong, but only one of them ends up on the purchase agreement.

If you are trying to figure out how to value a small business, or you are staring down an actual sale and need to know how to value a small business for sale, the honest answer is that small business valuation rarely comes down to one formula. There are three recognized approaches, and which one sets your price depends on your industry, your size, and how much profit walks out the door with you every night. 

This guide covers how to calculate business value using each approach, when buyers move from an SDE multiple to an EBITDA multiple, which add-backs survive due diligence, and where a free business valuation calculator helps versus where it gets you into trouble.

Key Takeaways:

• Most Main Street businesses (roughly under $5 million in revenue) get priced on a multiple of seller’s discretionary earnings; larger, institutional buyers price on EBITDA instead.
• The valuation formula you choose matters less than the quality and documentation of your earnings number.
• Add-backs can raise your SDE or EBITDA substantially, but only the ones a lender or buyer’s accountant will actually accept.
• A free business valuation calculator gives you a ballpark; a certified appraisal is what banks, courts, and skeptical buyers rely on.

The Three Approaches to Business Valuation

Every business valuation comes down to one of three approaches. Owners searching how to evaluate a business worth or trying to pin down how to determine the value of a business more precisely usually need to understand all three before they trust any single number.

The income approach values a business on the cash flow it is expected to produce, either discounted back to today’s dollars (a discounted cash flow model) or capitalized using a multiple of earnings, which is where SDE and EBITDA multiples come from. This dominates for any small business that is actively profitable, since buyers are purchasing future income, not a pile of equipment.

The market approach values a business against what similar businesses actually sold for, using comparable sales data to build industry multiples for a given trade and revenue band. Private sale data is thinner than public data, so this approach rarely stands alone for a small business, but it works as a strong sanity check against an income-based number.

The asset-based approach values a business as net book value minus liabilities, or liquidation value if the doors are closing. This carries the most weight when a business is asset-heavy but earns thin or inconsistent profit: equipment-heavy contractors, real estate holding companies, or businesses being wound down rather than sold as a going concern.

A profitable, ongoing service business or restaurant leans almost entirely on the income approach, checked against the market. A company sitting on expensive equipment or property with weak margins often sees its asset-based number set the floor instead.

The SDE Multiple Method

Seller’s discretionary earnings (SDE) is the standard business valuation formula for Main Street businesses, generally anything valued under roughly $5 million. SDE is the total financial benefit one full-time owner-operator gets from the business in a year, after operating expenses but before the owner’s own pay, perks, and one-time items get added back.

How to Calculate SDE From a P&L

Start with net income and add back owner compensation and payroll taxes, owner perks run through the business (vehicle, phone, health insurance, travel), interest expense, income taxes, depreciation and amortization, and any one-time or non-recurring costs.

SDE = Net Income + Owner Compensation + Owner Perks + Interest + Taxes + Depreciation & Amortization + One-Time Costs

Brokers typically build this off a trailing twelve-month P&L rather than the last fiscal year, since it reflects the current run rate of the business.

Typical SDE Multiples by Business Type

For example, a landscaping company shows $85,000 in pretax net income. The owner takes a $65,000 salary, runs a personal vehicle through the business at $8,000 a year, paid a one-time legal settlement of $12,000, and the P&L carries $10,000 in depreciation and $3,000 interest.

SDE = $85,000 + $65,000 + $8,000 + $12,000 + $10,000 + $3,000 = $183,000

At a 2.0x to 2.5x multiple typical for a home service business, this puts the value at roughly $366,000 to $457,500, before adjusting for inventory, working capital, or debt assumed at closing.

The EBITDA Multiple Method

EBITDA meaning: earnings before interest, taxes, depreciation, and amortization. It strips out financing decisions and non-cash accounting choices so buyers can compare operating performance across companies with different capital structures. The formula is simple:

EBITDA = Net Income + Interest + Taxes + Depreciation + Amortization

The key difference from SDE is that EBITDA does not add back the owner’s full compensation. It assumes the business needs a market-rate manager to run it day-to-day, so only pay above what a hired manager would cost gets normalized out.

When Buyers Move From SDE to EBITDA

Once a business crosses roughly $5 million in revenue, or earnings clear about $1 million, the buyer pool shifts from individual owner-operators toward private equity firms and strategic acquirers who plan to install professional management rather than run the business themselves. EBITDA becomes the relevant formula at that point, and EBITDA margin (EBITDA as a percentage of revenue) becomes a key screening number for these buyers.

Typical EBITDA Multiples by Size

An HVAC company, for example, generates $4 million in revenue. After normalizing owner add-backs and inserting a market-rate general manager salary, EBITDA comes to $600,000, a healthy 15 percent EBITDA margin. At a 4.5x to 5.0x multiple for this size band, enterprise value lands between $2.7 million and $3.0 million.

That answers how to calculate enterprise value of a private company at this tier: a cash-free, debt-free number before adjusting for working capital and inventory, negotiated separately through a working capital peg.

Asset-Based and Market-Based Valuation

Net book value is the simplest number on the page: total assets minus total liabilities, straight off the balance sheet. The net book value formula is NBV = Total Assets – Total Liabilities. It is a useful floor, especially for equipment-heavy businesses, but it usually understates true value because it ignores goodwill (the premium buyers pay for a trained team, an established customer base, and a recognized name) and because depreciated book values often sit below what assets would fetch on the open market.

Liquidation value goes a step further: what the assets would bring if sold quickly, typically at a discount to fair market value. This is the number lenders and bankruptcy courts look at, and it represents the floor for a business that cannot be sold as a going concern.

The market approach sanity-checks all of this. Brokers and appraisers pull comparable sales data from transaction databases covering closed deals in a given trade and revenue range, then translate that into industry multiples specific to your type of business. If your SDE-multiple valuation comes in far above what similar businesses in your region actually sold for, that is a warning sign for buyer financing, for an SBA lender’s appraisal, and for your own expectations heading into negotiations.

Add-Backs and Normalizing Your Earnings

Add-backs turn a modest bottom line into a defensible SDE or EBITDA number, but only if a lender’s underwriter or a buyer’s accountant will actually accept them. Normalizing your earnings means adjusting the P&L to reflect what the business would earn under an arm’s-length owner, not the specific owner sitting in the chair today.

Expenses that typically get added back include the owner’s salary and payroll taxes, personal vehicle and cell phone costs run through the business, above or below-market rent paid to a related party, family members on payroll who are not actually working, and genuinely one-time items like a legal settlement or a single major repair.

Documentation matters as much as the add-back itself. Every add-back should tie to a paid invoice, a canceled check, or a line item matching the tax return, because SBA lenders will pull three years of returns and reconcile them against the deal package before funding anything.

Add-Backs Buyers Routinely Reject

What Raises and Lowers Your Multiple

Two businesses with identical SDE can sell for very different prices because the multiple reacts to how reliable and transferable that earnings number actually is.

Recurring revenue (contracts, subscriptions, service agreements) raises the multiple, since buyers are paying for cash flow likely to continue rather than start over from zero. Customer concentration works the other way: if one client accounts for a large share of revenue, buyers discount the multiple to price in the risk of losing that account. Owner dependency has the same effect. 

A business that cannot run a week without the founder answering calls or doing the skilled work personally is worth less than one with a manager and a trained team already in place. A consistent growth rate raises the multiple, while flat or declining revenue compresses it, since buyers price a trend, not a single year. Margin quality matters too: a business with stable margins above its industry peers commands a premium over one with the same revenue but thinner, more volatile profit. Industry itself sets a baseline: software and recurring-revenue service businesses structurally trade at higher multiples than low-margin retail or restaurants, regardless of how well any single operator runs the place.

Valuation Calculators vs a Professional Valuation

Search how to value a business calculator and you will find dozens of tools promising an instant number. A small business valuation calculator, or any free business valuation calculator, is useful for a first gut check: plug in revenue and a rough earnings figure, apply a generic industry multiple, and get a ballpark before investing real time. Treat a company value calculator like a home value estimator online: directionally helpful, not something you would put in a contract.

Where these tools mislead is in the details that actually move price. A valuation calculator cannot see your customer concentration, whether your add-backs will survive a lender’s underwriting, or how your growth rate compares to your trade. Two businesses with identical revenue and the same generic multiple can land 30 percent apart once those factors get priced in properly.

A formal valuation or certified appraisal earns its cost when the number must hold up to outside scrutiny: an SBA loan above a certain size requires an independent appraisal, gifting shares for estate and tax purposes needs an appraisal the IRS will respect, and partner buyouts or shareholder disputes need a defensible fair market value a calculator cannot produce.

Conclusion

How to value a business comes down to matching the method to the business itself. Income-based multiples, whether SDE or EBITDA, dominate for profitable, ongoing operations. Asset-based valuation sets the floor for equipment- or property-heavy businesses with thin margins. Market comparables sanity-check whichever number you land on.

But the approach matters less than most owners assume. Two companies using the identical business valuation formula can land on very different values, because the multiple reacts to the quality of the earnings behind it: how documented the add-backs are, how much revenue repeats without new sales effort, how owner-dependent the business is, and which direction the trend line is moving. Get the earnings number right and defensible first. The multiple takes care of itself.