By GreenGrowth CPAs Advisory Team · Updated October 2026 · Advisory
To calculate business valuation, start with normalized earnings or cash flow, then apply three accepted approaches: income, market, and asset. An appraiser compares the results, adjusts for control and marketability, and states a value under a defined standard, usually fair market value.
Below, we walk through each method the way a valuation analyst would, and flag when a quick estimate stops being enough.
QUICK ANSWER
To calculate business valuation, normalize the company's earnings, then value it three ways: the income approach (discounted cash flow or capitalization of earnings), the market approach (multiples of SDE, EBITDA, or revenue from comparable sales), and the asset approach (assets minus liabilities at current value). Weight the most reliable results, then apply any discounts for lack of control or marketability. Tax, SBA, and 409A work need a credentialed, independent appraisal.
Business Valuation: At a Glance
- Standard of value: Most tax and lending work uses fair market value between an informed, willing buyer and seller.
- Three approaches: Income, market, and asset. A good appraisal considers all three.
- Start point: Normalized earnings, with owner perks and one time costs removed.
- Small vs. mid-size: Owner operated businesses usually trade on SDE, larger ones on EBITDA.
- Discounts: A minority, non marketable stake is often worth less than its pro rata share.
- Credentials: Gift and estate filings, SBA acquisition loans, and 409A grants call for an independent appraiser.
What Does a Business Valuation Actually Measure?
A valuation answers one question: what is this interest worth, to whom, and on what date? The answer changes with the standard of value, so set that first.
Fair Market Value and Revenue Ruling 59-60
For federal tax purposes, fair market value is "the price at which the property would change hands between a willing buyer and a willing seller, neither being under any compulsion to buy or to sell and both having reasonable knowledge of relevant facts." That wording comes from Treasury Regulation 20.2031-1(b). Revenue Ruling 59-60 remains the core IRS guidance for valuing closely held businesses.
The ruling, echoed in the IRS valuation guidelines in IRM 4.48.4, lists eight factors to weigh:
- The nature and history of the business
- Economic and industry outlook
- Book value and financial condition
- Earning capacity
- Dividend paying capacity
- Goodwill and other intangible value
- Past sales of the stock and the size of the block being valued
- Market prices of comparable, actively traded companies
Other Standards You Will Hear
Investment value is what one specific buyer would pay, including its own synergies. Fair value in a shareholder dispute is a state law concept, and courts there may refuse discounts that a gift tax appraisal would include.
Step One: Normalize the Financial Statements
Every method depends on clean numbers. Owners keep private company books to minimize tax, not to show a buyer true earnings. Normalization fixes that.
- Owner compensation: Adjust salary and benefits to what you would pay a hired manager for the same role.
- One time items: Remove lawsuit settlements, a one off consulting project, or a casualty loss.
- Related party rent: Restate rent paid to an owner's real estate entity to market rates.
- Discretionary expenses: Back out personal vehicles, family on payroll, and travel that does not serve the business.
- Non operating assets: Separate excess cash or investment property and value those items on their own.
Buyers test each adjustment, and undocumented add-backs rarely survive diligence. Our business event readiness work helps owners build support for them before a sale.
The Income Approach: DCF and Capitalization of Earnings
The income approach values a business by the cash it will produce for an owner, adjusted for risk. It is the most common primary method for profitable operating companies. Our guide on the role of earnings in business valuation covers the inputs in more depth.
Discounted Cash Flow
A DCF projects free cash flow for a set period, often five years. Each year's cash flow is discounted to today at a rate that reflects the return an investor would demand for this level of risk. A terminal value captures everything after the forecast period. Small private companies carry higher discount rates because their cash flows are less certain.
Capitalization of Earnings
This method fits stable businesses with predictable growth. You divide one year of expected normalized cash flow by a capitalization rate. The cap rate equals the discount rate minus a long term sustainable growth rate.
Hypothetical example: A company expects $600,000 of normalized cash flow next year. Its discount rate is 20% and its long term growth rate is 3%, so the cap rate is 17%. Dividing $600,000 by 0.17 gives an indicated value of about $3.5 million. Raise the discount rate to 22% and the value falls to roughly $3.2 million. Small changes in risk move the result a lot.
Planning a sale, buyout, or gift of company stock? Get a clear view of value before you commit.
Book a Consultation →The Market Approach: What Similar Businesses Sold For
The market approach prices your company from what buyers paid for comparable ones. It is intuitive, but only as good as the comparables.
Guideline Public Company Method
This method borrows multiples, such as enterprise value to EBITDA, from public companies in the same industry, adjusted for size and risk. It suits larger private companies that resemble public peers.
Guideline Transaction Method
Here the analyst uses multiples from actual sales of private companies. Deal terms matter. A price that includes an earnout or seller note is not the same as an all cash price.
SDE vs. EBITDA Multiples
Owners often compare a multiple from one measure against earnings computed on the other. That mistake can overstate value badly. Always match the multiple to the earnings measure it came from.
▶ SDE vs. EBITDA at a Glance
| Feature | SDE (Seller's Discretionary Earnings) | EBITDA |
|---|---|---|
| Typical company | Owner operated, often smaller main street businesses | Larger companies with a management team in place |
| Owner pay | Adds back one owner's full compensation | Deducts a market salary for every manager, owners included |
| Buyer profile | Individual buyer who will run the business | Private equity, strategic, or financial buyer |
| Multiple level | Applied to a larger earnings figure, so multiples run lower | Applied to a smaller figure, so multiples run higher |
Industry structure can break standard multiples. Our posts on CPA firm valuation multiples and on why standard multiples fail for cannabis businesses show how deal structure and tax rules reshape the math.
The Asset Approach: Building Value From the Balance Sheet
The asset approach restates every asset and liability to current value and subtracts. Book value is only the starting point, because depreciation schedules rarely match what equipment or property would actually fetch.
It fits holding companies, real estate entities, and businesses with thin earnings. It also tends to set a floor on value. For a deeper walkthrough, see our asset valuation guide.
Discounts for Lack of Control and Marketability
Valuing a 20% stake is not as simple as taking 20% of the company value. A minority owner cannot set salaries, force distributions, or sell the company. That gap supports a discount for lack of control.
A second discount, for lack of marketability, reflects that a private interest cannot be sold quickly for cash. The IRS has published a job aid for its own appraisers on this discount, and it scrutinizes large discounts in gift and estate returns. Transfer restrictions and buy-sell terms in the operating agreement often drive the size.
When Do You Need a Credentialed Valuation?
An internal estimate is fine for planning. Several situations require more.
409A Valuations for Stock Options
Private companies granting options must set the strike price at or above fair market value. Treasury Regulation 1.409A-1 treats an independent appraisal as presumptively reasonable if it is dated no more than 12 months before the grant. Certain illiquid startups can instead rely on a qualified internal valuation, subject to strict conditions.
Gift and Estate Tax
Transfers of private company interests to family members or trusts need a qualified appraisal to support the reported value. Adequate disclosure on a gift tax return also starts the statute of limitations running.
SBA Acquisition Loans
Under SBA lending rules, a change of ownership loan generally needs an independent valuation from a qualified source. That applies when the financed amount, minus the appraised value of real estate and equipment, exceeds $250,000, or when buyer and seller have a close relationship.
Credentials and Standards
Look for an ASA from the American Society of Appraisers, an ABV from the AICPA, or a CVA from NACVA. CPAs who value businesses follow the AICPA's VS Section 100. It separates a full valuation engagement, which ends in a conclusion of value, from a narrower calculation engagement.
Divorce, buyouts, and litigation also need a defensible report. For owners planning an exit, our succession planning team pairs valuation with tax structure.
KEY TAKEAWAYS
- ›To calculate business valuation, normalize earnings first, then test the income, market, and asset approaches against each other.
- ›Fair market value, as framed in Revenue Ruling 59-60, is the standard for most tax work.
- ›Match SDE multiples to SDE and EBITDA multiples to EBITDA. Mixing them can overstate value.
- ›Minority and non marketable interests often carry discounts that the IRS reviews closely.
- ›409A grants, gift and estate transfers, and many SBA loans require an independent appraiser.
Frequently Asked Questions
Start by normalizing the last three to five years of financials so they show true, repeatable earnings. Next, apply the income approach (a DCF or capitalization of earnings), the market approach (multiples from comparable companies or sales), and the asset approach where it fits. Then compare the results and weight the most reliable ones. Finally, adjust for control and marketability and state the result under a defined standard of value, usually fair market value.
Look at what a buyer actually pays for: dependable cash flow, growth, and low risk. Review earnings quality, customer concentration, owner dependence, margins, and the condition of the books. Then compare your normalized SDE or EBITDA against multiples from similar businesses that sold recently. A quick evaluation like this is fine for planning. For a sale, a loan, a tax filing, or a dispute, get a formal valuation from a credentialed analyst.
It relies on future expected earnings. Historical profits matter only as evidence of what the business can earn going forward. A discounted cash flow model projects future cash flows and discounts them to today at a rate that reflects risk. Capitalization of earnings divides one normalized year of expected earnings by a capitalization rate. Net asset value belongs to the asset approach, which is a separate method.
Asset valuation estimates what a company's assets are worth, minus its liabilities, to reach the value of the equity. A proper asset approach restates each item to current value rather than book value. That includes real estate, equipment, inventory, and, where they can be identified, intangible assets. The method works best for holding companies, asset heavy businesses, and companies whose earnings are too low to support a higher income based value.
Use the income approach or the market approach. Service firms, software companies, and agencies often own very little equipment, yet they can be worth a great deal because of recurring revenue and customer relationships. Value comes from normalized cash flow and its risk, priced through a DCF, a capitalization rate, or comparable transaction multiples. Contracts, customer lists, and brand are intangible assets that an appraiser can value separately when a purchase price allocation requires it.
A 409A valuation sets the fair market value of a private company's common stock so stock options can be granted at or above that value. Under the Treasury regulations, an independent appraisal is presumed reasonable if it is dated no more than 12 months before the grant. Companies usually refresh it each year and after a funding round or another material event. A low strike price can trigger immediate income inclusion and an extra 20% tax for the employee.
Where to Go From Here
Know What Your Business Is Worth Before You Negotiate
Planning a sale, buyout, estate transfer, or SBA loan? We help owners clean up earnings, document add-backs, and see value the way buyers and the IRS will.
KEY NUMBERS
A Defensible Valuation Starts With Clean Earnings.
Book a free consultation. We will review your financials, flag the adjustments buyers will question, and map out the valuation you need.
Book Your Free Consultation →GreenGrowth CPAs · Advisory Team
Get more GreenGrowth CPAs insights in Google Search and AI Mode.
