Business Valuation Standards: Approaches, Appraisers, and IRS Rules

Business valuation standards are the professional and legal rules that govern how a company’s worth is measured, who is qualified to measure it, and how the result must be documented so it survives review by the IRS, a court, or a transaction counterparty. They come from three main sources in the United States: the Uniform Standards of Professional Appraisal Practice (USPAP), the AICPA’s Statement on Standards for Valuation Services, and the tax code and Treasury regulations that dictate what the IRS will accept. A valuation prepared outside these rules can be rejected outright, and the penalties for a bad number can reach 20% to 40% of any resulting tax underpayment.¹

When You Actually Need a Compliant Valuation

Not every decision about a business requires a formal appraisal, but several situations do. Federal tax law drives most of them. Any noncash charitable contribution over $5,000 requires a qualified appraisal by a qualified appraiser, and the IRS can deny the deduction entirely if either piece is missing.² Estate and gift tax filings involving closely held business interests draw active IRS scrutiny, and the agency maintains its own business valuation guidelines for its examiners.³

Courts require valuations in divorce cases, shareholder disputes, and partnership dissolutions. Employee Stock Ownership Plans need an annual independent appraisal. Mergers and acquisitions rely on them to justify price to boards, lenders, and regulators. Buy-sell agreements often lock in a valuation standard so the price is defined when an owner dies, exits, or is bought out. In every one of these settings the methodology matters as much as the final number.

Who Sets the Standards

USPAP is the most widely recognized set of ethical and performance standards for appraisers in the United States. It covers real property, personal property, business valuation, and mass appraisal. The Appraisal Standards Board of The Appraisal Foundation writes and updates USPAP, with the current edition taking effect January 1, 2024.⁴

The AICPA has its own framework, VS Section 100, which governs AICPA members performing engagements that produce a conclusion of value or a calculated value.⁵ Credentialing bodies add another layer. The American Society of Appraisers requires a USPAP course and an ethics exam for membership. The National Association of Certified Valuators and Analysts holds the only valuation credential accredited by the National Commission for Certifying Agencies.⁶

At the international level, the International Valuation Standards Council publishes standards aimed at consistency across borders.⁷ For U.S. work, USPAP and the AICPA standards are what matter, and they share most core principles with the international framework.

The Standard of Value

The standard of value defines the hypothetical transaction the appraiser is measuring. Choose the wrong one and the entire valuation answers the wrong question. Three standards cover most engagements.

Fair Market Value

Fair Market Value (FMV) is the price property would change hands for between a willing buyer and a willing seller, neither under compulsion, both with reasonable knowledge of the relevant facts. The definition comes from IRS Revenue Ruling 59-60, originally written for closely held stock in estate and gift tax matters but now the dominant standard for essentially all federal tax valuations. The ruling directs appraisers to weigh factors including the nature and history of the business, economic and industry conditions, financial condition and book value, earning capacity, dividend capacity, goodwill and intangibles, prior sales of the company’s stock, and prices of comparable public companies. No rigid formula applies; the appraiser has to exercise judgment about how much each factor matters for the specific business.

Getting FMV wrong on a tax return has teeth. If the claimed value is 150% or more of the correct value, the IRS treats it as a substantial valuation misstatement and imposes a 20% penalty on the resulting tax underpayment. At 200% or more of the correct amount, it becomes a gross valuation misstatement and the penalty doubles to 40%.¹

Fair Value

Fair Value means different things in different contexts. Under ASC 820 for financial reporting, it is the price that would be received to sell an asset (or paid to transfer a liability) in an orderly transaction between market participants at the measurement date. In shareholder litigation, Fair Value is what courts use when ordering a buyout of an oppressed minority owner. The most important practical difference between Fair Value and FMV is that Fair Value usually does not permit discounts for lack of control or lack of marketability, which can change the final number by 20% to 40% or more.

Investment Value

Investment Value is what a business is worth to a specific buyer, taking into account that buyer’s synergies, tax position, or operational advantages. A strategic acquirer able to eliminate $2 million in overlapping costs will produce a higher Investment Value than an anonymous open-market buyer would. This standard fits acquisition negotiations and internal capital decisions. The IRS will reject it on a tax return because it is a subjective, buyer-specific number rather than an arm’s-length market price.

The Premise of Value

Where the standard defines the transaction, the premise defines the assumed condition of the business at the time of that transaction. A going concern premise assumes the business will keep operating indefinitely and is the default for a profitable, stable company. If the business is expected to close, the appraiser shifts to a liquidation premise. Orderly liquidation gives the seller a reasonable window to market assets. Forced liquidation assumes an immediate sale under pressure, which almost always produces significantly lower proceeds.

The gap between these premises can be enormous. An operating company with loyal customers and recurring revenue routinely commands multiples of what its equipment would bring at auction. Professional standards require the appraiser to identify the highest and best use of the business and match the premise to the most probable economic outcome. Assuming liquidation for a healthy company understates value; assuming perpetual operation for a business already winding down overstates it.

The Three Valuation Approaches

Professional standards recognize three approaches, and most engagements use more than one and reconcile the results.

Income Approach

The income approach values the business as the present value of its expected future earnings. The most common method inside this approach is a discounted cash flow analysis, which projects free cash flow over a forecast period and applies a discount rate reflecting the risk that those cash flows won’t materialize. A company with stable, predictable revenue gets a lower discount rate and therefore a higher value than a startup burning cash to chase growth. For operating companies this is usually the most influential method, because buyers pay for future profits, not past ones.

Market Approach

The market approach values the business by comparison. The guideline public company method uses trading multiples of comparable public companies, adjusted for size, growth, and risk. The guideline transaction method uses actual sale prices of comparable private companies. Both provide a reality check against what real buyers have paid. The difficulty is finding truly comparable companies, especially in niche industries with few transactions.

Asset-Based Approach

The asset-based approach restates each asset and liability on the balance sheet to current value. It fits holding companies, real estate-heavy businesses, and companies whose value sits in tangible property rather than earnings. For an operating company with a strong brand or valuable customer relationships, this approach usually understates value because those intangibles rarely appear on the balance sheet at what they are actually worth.

Discounts for Lack of Control and Marketability

Two discounts show up in almost every closely held business valuation and are among the most litigated topics in the field.

A lack-of-control discount, sometimes called a minority discount, reduces the value of an ownership interest that cannot direct company decisions such as setting dividends, hiring management, or forcing a sale. A 30% interest in a closely held company is typically worth less than 30% of the enterprise value because the holder cannot compel a liquidity event or change strategy.

A lack-of-marketability discount reflects the difficulty of selling an interest with no public trading market. Selling private company shares takes longer, costs more, and carries more uncertainty than selling public stock. Combined, these discounts can reduce a minority interest’s value by 25% to 50% compared with a pro-rata share of the whole.

Whether the discounts apply depends on the standard of value and the purpose. For federal gift and estate tax filings under FMV, the IRS generally accepts both when properly supported, and taxpayers routinely claim them to reduce the taxable value of transferred interests. In shareholder oppression cases applying Fair Value, most courts reject them, reasoning that allowing them would punish the minority owner for the very lack of control and marketability the majority created. The party asserting a discount bears the burden of proving it applies.

IRS Rules for Qualified Appraisals and Qualified Appraisers

The IRS does not accept a valuation from just anyone. For noncash charitable contributions over $5,000, federal law requires both a qualified appraisal and a qualified appraiser, and missing either can wipe out the deduction.²

A qualified appraisal must be prepared in accordance with generally accepted appraisal standards, which the regulations define as the substance and principles of USPAP. A qualified appraiser must have verifiable education and experience in valuing the type of property involved, either through professional or college-level coursework plus at least two years of relevant experience, or through a recognized appraiser designation for that property type.⁸

Some people are automatically disqualified from serving as the appraiser no matter their credentials: the donor, the recipient of the donated property, any party to the transaction in which the donor acquired the property, and anyone related to or employed by those parties.⁸ These exclusions block the obvious conflict when someone with a stake in the outcome controls the number.

For contributions above $500,000, the full qualified appraisal must be attached to the tax return.⁹ Below that threshold, you keep the appraisal in your records; the IRS can still request it during an exam.

Appraiser Penalties

Appraisers themselves are on the hook for inflated or deflated numbers. Under IRC Section 6695A, an appraiser whose valuation causes a substantial or gross valuation misstatement owes a penalty equal to the lesser of two amounts: the greater of 10% of the tax underpayment or $1,000, capped at 125% of the gross income the appraiser received for the appraisal. The appraiser can avoid the penalty by showing the reported value was more likely than not correct.¹⁰ An appraiser earning a $7,000 fee on a valuation that produces a $100,000 underpayment can face a penalty of up to $8,750, more than the fee itself.

What the Report Must Contain

The valuation is only as strong as the report documenting it. A verbal estimate or a one-page letter generally will not survive court scrutiny, satisfy the IRS, or meet professional standards. The written report should include a statement of non-advocacy confirming the appraiser has no personal interest in the outcome, a description of the appraiser’s qualifications, the specific scope of work performed, and enough detail for a third party to follow the data, assumptions, and reasoning behind the conclusion.

Valuation Engagements vs. Calculation Engagements

Under VS Section 100, an AICPA member can perform two types of engagements.¹¹ A valuation engagement is comprehensive: the analyst applies whichever approaches and methods are appropriate and produces a conclusion of value, meaning a professional opinion of what the business is worth. A calculation engagement is narrower. The analyst and client agree in advance on specific methods, and the result is a calculated value rather than a full opinion. Calculation engagements cost less and take less time, but because the analyst did not consider all appropriate approaches, the result cannot be presented as a conclusion of value and may not hold up in contested proceedings.

Typical Costs

For most small to mid-sized businesses, a standard certified appraisal runs roughly $4,000 to $9,000, with price driven by complexity, number of entities, and the quality of the financial records. Simple broker opinions of value cost less. Complex enterprise valuations for private equity or IPO preparation can exceed $15,000 to $35,000. Forensic or litigation-support work, where the appraiser may need to testify, typically runs $20,000 or more. Flat fees are the norm for small business appraisals; hourly billing, often $300 to $700 per hour, is more common on large or contentious engagements.

Valuation Date, Shelf Life, and Record Retention

Every valuation is tied to a specific effective date, and the difference between the valuation date and the report date matters. The valuation date is the moment at which the appraiser estimates value. The report date is when the appraiser signs and delivers the document. The two can be weeks or months apart, and the appraiser generally considers only what was known or knowable as of the valuation date.³

For estate tax, the valuation date is typically the date of death, or six months later if the executor elects the alternate valuation date. For gift tax, it is the date of the gift. For charitable contributions, it is the date of the donation. The IRS does not publish a formal expiration for valuations, but because a valuation reflects conditions at a single point in time, its usefulness deteriorates as circumstances change. In practice, a valuation older than 12 to 18 months is risky to rely on for a tax filing or transaction without an update.

Events between the valuation date and the report date, called subsequent events, take professional judgment. If a major customer cancels a contract the week after the valuation date, the appraiser has to decide whether that event was reasonably foreseeable as of the valuation date. The IRS instructs its examiners to consider subsequent sales of the subject interest if those sales were reasonably foreseeable at the time of valuation.³ When an appraiser relies on a subsequent event, professional standards require disclosure and explanation in the report.

Under USPAP, appraisers must keep the work file at least five years after preparation, or at least two years after the final disposition of any judicial proceeding in which the appraiser testified about the assignment, whichever is later. As a business owner you should keep your copy of the report at least as long. For tax-related valuations, the IRS can examine a return for three years after filing, or six years if gross income is understated by more than 25%, so holding the supporting appraisal for at least that long protects you if questions come up.

The work file is more than the final report. It includes the data gathered, the analysis performed, correspondence, and the reasoning behind key judgments. If the valuation is challenged in an audit or in court, the depth of that file often decides whether the conclusion holds. A well-documented file signals a rigorous process; a thin one invites second-guessing.

1
Office of the Law Revision Counsel. 26 USC 6662 – Imposition of Accuracy-Related Penalty on Underpayments
2
Office of the Law Revision Counsel. 26 USC 170 – Charitable, Etc., Contributions and Gifts
3
Internal Revenue Service. Business Valuation Guidelines
4
The Appraisal Foundation. USPAP
5
AICPA & CIMA. Statement on Standards for Valuation Services (VS Section 100)
6
American Society of Appraisers. Information About ASA, NACVA, AICPA-ABV, CBV Institute, and RICS
7
International Valuation Standards Council. About IVSC
8
eCFR. 26 CFR 1.170A-17 – Qualified Appraisal and Qualified Appraiser
9
Internal Revenue Service. Instructions for Form 8283 (Noncash Charitable Contributions)
10
Office of the Law Revision Counsel. 26 USC 6695A – Substantial and Gross Valuation Misstatements Attributable to Incorrect Appraisals
11
AICPA & CIMA. VS Section 100 – Calculation Engagement and Report FAQs