A business valuation for tax purposes is a formal appraisal of a private company interest at fair market value, required whenever ownership changes hands through death, gift, charitable donation, or certain compensation arrangements. The numbers matter. For 2026, estates above the $15,000,000 basic exclusion face a top rate of 40%, and misstating the value of a business interest can add accuracy-related penalties of 20% to 40% of the resulting tax underpayment.1Office of the Law Revision Counsel. 26 USC 2001 – Imposition and Rate of Tax A defensible appraisal, prepared by someone the IRS recognizes as qualified, is what stands between you and those penalties.
The Fair Market Value Standard
Every valuation for tax purposes turns on one question: what would a hypothetical buyer pay a hypothetical seller, neither under pressure and both reasonably informed? That definition comes from Revenue Ruling 59-60, and the IRS still treats it as the foundational framework for closely held businesses. The ruling directs appraisers to weigh eight factors:
- Business history and nature — what the company does and how it evolved
- Economic and industry outlook
- Book value and financial condition
- Earning capacity
- Dividend-paying capacity
- Goodwill and other intangibles
- Prior sales of the company’s stock and the size of the block being valued
- Market prices of comparable public companies
The standard deliberately ignores what any specific buyer would pay. A competitor who wants your customer list might pay a premium, but that strategic value has no place in a tax valuation. Fair market value assumes a generic transaction between generic parties.
When the IRS Requires a Valuation
Estate Tax
When an owner dies, every asset in the estate, including closely held business interests, is reported on Form 706 at fair market value as of the date of death.2Office of the Law Revision Counsel. 26 USC 2031 – Definition of Gross Estate The 2026 basic exclusion is $15,000,000 per person, and estates above that line face graduated rates topping out at 40%.3Internal Revenue Service. Whats New – Estate and Gift Tax Where the business is the bulk of the estate, the valuation essentially determines the tax bill.
Gift Tax
Lifetime transfers of business interests to family members are gifts for tax purposes and go on Form 709. Each person can give up to $19,000 per recipient per year without filing.4Internal Revenue Service. Gifts and Inheritances Larger gifts draw against the same $15,000,000 lifetime exemption that shelters the estate. When a valuation discount is claimed, Form 709 requires an attached statement explaining the method and the factors used.5Internal Revenue Service. Instructions for Form 709
Charitable Donations
Donating a non-publicly traded business interest worth more than $5,000 requires a qualified appraisal to support the deduction; without one, the IRS will generally deny the deduction entirely.6Internal Revenue Service. Publication 561 – Determining the Value of Donated Property The appraisal must be completed no earlier than 60 days before the donation and no later than the due date of the return on which you first claim the deduction.7Internal Revenue Service. Instructions for Form 8283
Stock Options Under Section 409A
Private companies granting stock options must set the exercise price at or above fair market value on the grant date. If it comes in too low, the IRS treats the shortfall as deferred compensation under Section 409A, triggering immediate income tax and a 20% penalty tax on the employee. The common way to satisfy this rule is an independent appraisal, which creates a safe harbor presumption that the valuation was reasonable. That appraisal must be performed within 12 months before the grant date.
Employee Stock Ownership Plans
Companies with an ESOP holding stock not traded on a public exchange must obtain an independent appraisal. The plan cannot distribute shares or process transactions without a current valuation.8Internal Revenue Service. Examining Employee Stock Ownership Plans
Discounts That Reduce Taxable Value
Applied discounts are often the single largest driver of the final number. Two dominate.
Discount for Lack of Control
A 20% owner who cannot hire management, force a distribution, or approve a sale holds something worth less than 20% of the whole enterprise. The IRS does not allow a flat percentage; the appraiser has to analyze the specific rights attached to the interest and justify the discount from the facts. The IRS has confirmed that family members’ holdings are not aggregated to deny a minority discount. A 20% interest given to a child is valued as a 20% block, not as part of the family’s larger position.
Discount for Lack of Marketability
Shares in a private company cannot be sold on an exchange, and finding a buyer takes time and usually a price concession. Professional appraisers typically apply marketability discounts between 15% and 40%, depending on distribution history, earnings stability, transfer restrictions in the operating agreement, and expected time to a sale. Courts have rejected discounts above 30% when the evidence showed active buyer interest, so documentation matters.
These discounts can compound, but the IRS scrutinizes them closely, and appraisers have to avoid double-counting the same disadvantage in both categories.
The Three Valuation Approaches
The IRS recognizes three broad approaches. Most reports use at least two and reconcile the results into a single conclusion.
Income Approach
The income approach values the business on the cash it is expected to generate. In a discounted cash flow analysis, the appraiser projects earnings, typically over five to ten years, then converts those future dollars to present value using a discount rate that reflects the risk of actually receiving them. A riskier business gets a higher discount rate and a lower value. Alternatively, the appraiser may capitalize a single representative year of earnings by dividing it by a rate that accounts for risk and expected growth. This approach tends to carry the most weight for operating businesses with predictable revenue.
Market Approach
The market approach uses what comparable businesses have actually sold for. The appraiser identifies public companies or recent private transactions in the same industry and derives multiples such as price-to-earnings or enterprise value-to-revenue, then applies them to the subject company. The challenge is finding truly comparable businesses, especially in niche industries.
Asset-Based Approach
This method restates every asset and liability on the balance sheet to fair market value; the difference is the company’s net asset value. It fits holding companies, real estate firms, and businesses that are winding down or hold value mainly in tangible property. For a profitable operating company, the asset-based approach often produces a lower figure because it does not capture ongoing earnings power.
The appraiser weights the approaches based on the nature of the business, and the final report has to explain why each method received the weight it did.
What the Appraiser Needs From You
Expect requests for several years of financial statements (balance sheet, income statement, and cash flow) plus federal income tax returns for the same period, which give the IRS a verified baseline to cross-reference.
The appraiser also needs governance documents: articles of incorporation, bylaws or operating agreements, and any buy-sell provisions. These control ownership rights, voting structure, and transfer restrictions, all of which feed directly into discount analysis. A list of subsidiaries and affiliated entities captures the full organizational picture.
One of the most common adjustments is officer compensation. In many closely held businesses, the owner’s salary is set for tax efficiency rather than market reality. An owner might pay themselves $400,000 when a hired manager would cost $200,000, or the reverse. The appraiser normalizes this by substituting a market-rate salary, which changes the earnings picture and often moves the valuation more than any other single adjustment.
Non-operating assets need to be identified and valued separately: excess cash, investment portfolios, or real estate not used in daily operations. On the liability side, disclose pending lawsuits, environmental obligations, and off-balance-sheet commitments. Incomplete information is the fastest way to produce a valuation that collapses under IRS scrutiny.
Who Counts as a Qualified Appraiser
The IRS does not accept valuations from just anyone. A qualified appraiser must either hold a recognized designation from a professional organization (such as Accredited in Business Valuation or Certified Valuation Analyst) or have completed relevant professional-level coursework and accumulated at least two years of experience valuing the type of property in question.7Internal Revenue Service. Instructions for Form 8283 The appraiser must regularly perform appraisals for compensation and must describe their education and experience in the report.
Certain people are automatically disqualified: the taxpayer, the recipient of the gift or donation, any party to the transaction, and anyone employed by or related to these individuals.9eCFR. 26 CFR 1.170A-17 – Qualified Appraisal and Qualified Appraiser The appraiser must also acknowledge in the report that they may face civil penalties for a substantial or gross misstatement.
Those penalties are real. Under Section 6695A, an appraiser whose valuation causes a substantial or gross valuation misstatement faces a penalty equal to the greater of 10% of the resulting tax underpayment or $1,000, capped at 125% of the fee received for the work.10Office of the Law Revision Counsel. 26 USC 6695A – Substantial and Gross Valuation Misstatements Attributable to Incorrect Appraisals The IRS can also seek a court injunction barring the appraiser from preparing future tax appraisals.11Internal Revenue Service. IRM 20.1.12 – Penalties Applicable to Incorrect Appraisals
Penalties for Getting the Value Wrong
For the taxpayer, the accuracy-related penalty is 20% of the tax underpayment caused by the misvaluation, doubled to 40% for a gross valuation misstatement.12Office of the Law Revision Counsel. 26 USC 6662 – Imposition of Accuracy-Related Penalty on Underpayments A gross misstatement generally means a reported value that is 40% or less of the correct value (for overstatements that inflate deductions) or 200% or more of the correct value (for understatements that shrink taxable transfers).
These penalties come on top of the tax and interest owed. A defensible valuation report from a qualified appraiser is the best protection, because it demonstrates reasonable cause and good faith, the statutory defense against accuracy-related penalties.
Filing and Adequate Disclosure
The valuation report attaches to whichever form the transaction triggers. Estate tax returns use Form 706.13Internal Revenue Service. About Form 706 – United States Estate and Generation-Skipping Transfer Tax Return Lifetime gifts use Form 709.5Internal Revenue Service. Instructions for Form 709 Charitable contributions of business interests use Form 8283, Section B.7Internal Revenue Service. Instructions for Form 8283
Adequate disclosure carries more weight than most taxpayers realize. For gift tax returns, the IRS can only challenge a reported value within three years of filing.14Internal Revenue Service. Time IRS Can Assess Tax That three-year clock only starts if the gift was adequately disclosed, meaning the return details the valuation method, the financial data used, any discounts claimed, and, for entity interests, the fair market value of the entire entity before discounts.15Internal Revenue Service. Treasury Decision 8845 – Adequate Disclosure of Gifts If disclosure falls short, the IRS can reopen the return at any time, even decades later.
What a Valuation Costs
For a small to mid-sized company, a standard valuation report from a qualified appraiser typically runs between $5,000 and $15,000. Simple businesses with clean financials fall toward the lower end. Multiple entities, complex ownership structures, or significant intangibles push the cost higher. Litigation-ready or highly detailed reports for large estates can exceed $20,000. The fee tracks the complexity of the business and the work needed to normalize financials, analyze comparable transactions, and document discount calculations.