409A vs 8-K Valuation: Key Differences for Startups

Last Updated: March 2026

A 409A valuation and an 8-K valuation serve fundamentally different purposes in equity markets. A 409A valuation is an independent appraisal of a private company’s common stock fair market value (FMV) required under IRC Section 409A before stock options can be granted to employees or service providers. An 8-K valuation refers to the fair value or business valuation disclosures that public companies are required to file in a Form 8-K (a current report of material events) with the SEC when specific transactions occur. Sofer Advisors, a nationally recognized business valuation firm, provides both 409A valuations for private companies and valuation support for public company disclosures, led by David Hern CPA ABV ASA. Schedule a consultation to discuss your specific situation.

Key Takeaways

  • A 409A valuation applies exclusively to private companies; it establishes the strike price for employee stock options and is mandated by the IRS under IRC Section 409A.
  • An 8-K is an SEC current report filed by public companies; it may include or reference a business valuation when a material event such as an acquisition, merger, or impairment requires fair value disclosure.
  • 409A valuations are confidential internal documents; 8-K filings are public disclosures reviewed by the SEC and the market.
  • The standard of value for a 409A is fair market value (the IRS hypothetical willing buyer/seller standard); 8-K fair value disclosures follow ASC 820, which uses the “exit price” framework.
  • When a private startup transitions to a public company through an IPO, the 409A compliance history is reviewed by the SEC in the S-1 process, creating a direct link between 409A rigor and public market readiness.

Why This Matters

Founders, executives, and investors moving between the private and public company worlds often encounter both 409A and 8-K valuation contexts without fully understanding how they relate. Confusing the two creates compliance risk: treating a 409A as sufficient public disclosure, or assuming public company fair value standards are interchangeable with the IRS 409A framework, are both errors. For late-stage startups approaching an IPO, the 409A history directly affects SEC review. For public companies acquiring private targets, the 409A of the acquired company affects the purchase price allocation. Knowing the differences between these two valuation contexts is essential for any company navigating growth from private to public.

What Is a 409A Valuation and Who Must Get One?

A 409A valuation is a formal appraisal of a private company’s common stock FMV conducted by an independent qualified appraiser to satisfy the requirements of IRC Section 409A. The valuation establishes the minimum strike price at which the company may grant stock options without creating a deferred compensation arrangement subject to immediate income tax plus a 20% excise tax on the option holder. Any private company, regardless of revenue stage, that grants compensatory stock options or similar equity instruments must have a current 409A valuation. This includes C-corporations, S-corporations, LLCs, and foreign companies with US employees receiving equity compensation. The valuation is performed at a specific measurement date, is valid for 12 months (or until a material event occurs), and must be prepared by a qualified independent appraiser, meaning someone who is not employed by the company and who holds relevant education and experience in business appraisal. The IRS safe harbor, achieved by using a qualified independent appraiser, presumes the resulting FMV is reasonable, shifting the audit burden to the IRS.

What Is an 8-K Valuation and When Is It Filed?

An 8-K is a current report that publicly traded companies file with the SEC to disclose material events that shareholders and the investing public should know about. The SEC defines the events requiring an 8-K filing in Form 8-K instructions, which cover over 30 triggering event categories including:

  • Entry into or termination of a material definitive agreement (Item 1.01)
  • Completion of an acquisition or disposition of assets (Item 2.01)
  • Results of operations and financial condition (Item 2.02)
  • Amendments to articles of incorporation or bylaws (Item 5.03)
  • Financial statements and pro forma disclosures for significant acquisitions (Item 9.01)

When the material event involves a transaction with a valuation component, such as the acquisition of a target at a price that reflects a business valuation, the 8-K may reference or attach the relevant financial statements, fairness opinions, or pro forma disclosures. For very large acquisitions (above 20% significance thresholds under SEC rules), the 8-K must include audited financial statements of the acquired business and pro forma financial information. A 409A valuation is never itself filed as an 8-K exhibit Schedule a consultation with Sofer Advisors to get a defensible valuation.

How Do the Standards of Value Differ Between 409A and 8-K Contexts?

The standard of value used in a 409A is fair market value (FMV), defined by the IRS as the price at which property would change hands between a hypothetical willing buyer and a hypothetical willing seller, both having reasonable knowledge of all relevant facts and neither being under any compulsion to buy or sell. The fair value standard applicable to 8-K disclosures and financial statement fair value measurements (including purchase price allocations under ASC 805 and impairment tests under ASC 350) is ASC 820 fair value, which defines fair value as the exit price, 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. | Dimension | 409A Valuation | 8-K / ASC 820 Fair Value |

Standard of Value IRS Fair Market Value ASC 820 Exit Price
Applies To Private companies only Public companies (and acquired targets)
Governing Authority IRS / IRC Section 409A SEC / FASB ASC 820
Purpose Option strike price compliance Financial statement disclosure
Confidentiality Internal document Public filing / audited disclosure
Frequency Annual or per material event Per triggering event

In practice, FMV and ASC 820 fair value produce similar results for most operating businesses, but they can diverge in specific contexts such as valuing illiquid minority interests or assets in distressed markets.

What Happens to 409A Compliance When a Company Goes Public?

When a private company files an S-1 registration statement for an IPO, the SEC reviews the company’s option grant history in detail. The SEC compares the strike prices at which options were granted in the 12-24 months before the IPO filing to the IPO price. If there is a large gap between the most recent 409A FMV and the IPO price, the SEC may issue a comment letter alleging “cheap stock,” arguing that options were granted at prices below FMV. A strong 409A history, including defensible methodologies and appropriate equity allocation methods (OPM, PWERM, or hybrid as the stage warranted), is the best protection against a cheap stock comment. Companies that can demonstrate that the step-up from 409A FMV to IPO price reflects genuine value creation events (rather than an understated 409A) are better positioned to respond to SEC comments without restating prior compensation expense. The AICPA’s valuation guidance for privately-held company equity securities, and SEC guidance on stock compensation accounting, both emphasize that the transition from private to public does not erase the compliance history of the 409A program.

How Do Fairness Opinions Relate to 8-K Filings and Valuations?

A fairness opinion is a letter from an investment bank or independent financial advisor stating that the financial consideration to be paid or received in a proposed transaction is fair, from a financial point of view, to the shareholders. Public companies often obtain a fairness opinion before completing a significant merger or acquisition and then file it as an exhibit to the 8-K or proxy statement. A fairness opinion is neither a 409A valuation nor a formal business appraisal. It is a qualitative statement of opinion rather than a written fair value report, and it applies a different analytical framework.

Frequently Asked Questions

What is the main difference between a 409A and an 8-K?

A 409A is an internal private company valuation of common stock FMV, required by the IRS for stock option compliance. An 8-K is a public SEC filing by a publicly traded company disclosing a material event. The two are governed by different authorities (IRS versus SEC), apply different standards of value (fair market value versus ASC 820 exit price), and serve entirely different purposes.

Schedule a consultation to get expert guidance.

Does a public company need a 409A valuation?

Generally no. A public company’s stock is traded on an exchange, and the market price provides observable evidence of fair market value. Stock options granted at the market price on the grant date are not subject to Section 409A because the exercise price equals FMV at grant by definition. However, if a public company has outstanding convertible instruments, subsidiary entities with separate equity, or compensation programs involving private company equity, those instruments may require a separate 409A-type analysis.

Can a 409A valuation be used in an 8-K filing?

No. A 409A valuation is an internal compliance document and is not filed with the SEC. However, the existence of a 409A program and the FMV conclusions may be disclosed indirectly. In an S-1 IPO filing, the company includes a table of all option grants and related exercise prices in the 24 months before the filing. The SEC compares those prices to the IPO price and may reference the company’s 409A methodology in its review comments.

What is an ASC 820 fair value measurement?

ASC 820 defines fair value as the exit price, 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. ASC 820 applies to all fair value measurements in US GAAP financial statements, including purchase price allocations (ASC 805), goodwill impairment tests (ASC 350), equity compensation measurements (ASC 718), and financial instrument fair values.

What is a “cheap stock” comment from the SEC?

A cheap stock comment is an SEC review comment, typically issued in response to an S-1 IPO filing, that questions whether stock options were granted at prices below the true FMV of common stock in the period leading up to the IPO. The SEC compares the historical option exercise prices disclosed in the S-1 to the IPO price. If the gap between the most recent 409A FMV and the IPO price is large without a clear explanation of intervening value creation events, the SEC may argue that the 409A was understated and that compensation expense was therefore understated in the company’s historical financial statements.

Does a 409A need to be done every year?

Yes. A 409A valuation is valid for 12 months from the measurement date, or until a material event occurs, whichever comes first. Material events include closing a financing round, receiving a term sheet for an acquisition, experiencing a significant change in financial performance, or filing an S-1. Companies that grant options annually must complete a new 409A at least annually. Companies that grant options multiple times per year, or that experience frequent material events, may need 409A updates more often than once per year.

What qualifications should a 409A appraiser have?

The IRS requires a 409A valuation to be performed by a “qualified independent appraiser” with appropriate education and experience in business valuation and who is independent from the company. The most widely recognized credentials are ABV (Accredited in Business Valuation, issued by the AICPA) and ASA (Accredited Senior Appraiser, issued by the American Society of Appraisers). Sofer Advisors appraisers hold dual ABV and ASA credentials, satisfying the most stringent interpretation of the qualified appraiser standard applicable to 409A compliance.

How does a startup’s 409A history affect M&A diligence?

When a private startup is acquired, the acquirer’s legal and financial diligence team reviews the target’s 409A valuation history as part of equity compensation diligence. A gap in 409A coverage, a non-qualified appraiser, or options granted at prices the buyer believes were below FMV can result in a purchase price reduction, an indemnification holdback, or a representations and warranties insurance exclusion.

What is the difference between a 409A and a fairness opinion?

A 409A valuation is a formal appraisal that establishes the FMV of common stock for IRS compliance purposes. A fairness opinion is a qualitative statement by a financial advisor that the financial terms of a proposed transaction are fair from a financial point of view. A fairness opinion is not a valuation report; it does not establish FMV and is not intended for IRS compliance.

What happens to a startup’s 409A program when it is acquired by a public company?

When a startup is acquired by a public company, the startup’s equity compensation program (and its 409A history) becomes part of the acquisition diligence and the purchase price allocation. Any unvested startup options may be assumed, rolled into acquirer equity, or cashed out, depending on the deal structure. The startup’s 409A valuations are reviewed to determine whether historical option grants were compliant.

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Executive Summary

A 409A valuation and an 8-K valuation are governed by different authorities, serve different purposes, and apply different standards of value. A 409A is an IRS-required internal document for private company stock option compliance using the fair market value standard; an 8-K is a public SEC disclosure that may reference or incorporate fair value measurements under ASC 820. When a private startup goes public, its 409A history is reviewed by the SEC in the S-1 process, creating a direct link between historical 409A rigor and IPO readiness. Sofer Advisors delivers 409A engagements for private companies at every stage, with written reports that satisfy IRS, auditor, and SEC standards.

What Should You Do Next?

Private company founders who are granting stock options today are building a 409A compliance record that will be reviewed in every future financing round, M&A transaction, and IPO process. A defensible 409A history is not an administrative burden; it is a strategic asset. David Hern CPA ABV ASA, founder of Sofer Advisors, and a team of 14 W2 valuation professionals have completed 409A engagements for companies across all growth stages. Schedule your free consultation and build a compliance program that holds up under the scrutiny that comes with growth and discover The Sofer Difference.

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About the Author

David Hern CPA ABV ASA is the founder of Sofer Advisors and a nationally recognized business valuation expert with 15+ years of experience. He holds dual credentials as an Accredited in Business Valuation (ABV) from the AICPA and Accredited Senior Appraiser (ASA) from the American Society of Appraisers – certifications recognized by the IRS, SEC, and FINRA. A Georgia Tech Scheller College MBA graduate and former Director of Valuation at Alvarez & Marsal, David leads a team of 14 W2 valuation professionals serving clients in all 50 states.

This content is for informational purposes only and does not constitute professional valuation advice. Business valuation conclusions depend on specific facts and circumstances. Contact Sofer Advisors for guidance regarding your specific situation.