How Auditors and VCs Scrutinize a 409A Valuation

Why the reviewer's view matters: Most 409A guidance is written for the company buying the report. This article looks at the same report from the other side. If you know what a Big 4 audit team and a lead investor will test, you can hand them the answers before they ask, and avoid the two outcomes that cost the most time: a revised valuation in the middle of audit season and a diligence issue in the middle of a financing. For the producer's side of the same question, what a report needs to contain to survive review, see our guide to audit-defensible 409A valuations.

How do VCs assess 409A valuations?

VCs assess 409A valuations in three roles. As board members, they check that the value is reasonable before adopting it. As new investors, they confirm past option grants were priced at fair market value. As sellers, they know an acquirer will retest the history. In each role they focus on support and consistency, not a target number.

The three roles produce different questions:

• The board seat. An investor director votes to adopt the valuation and to approve grants at its price. Directors want a number that is low enough to keep options attractive to employees but supported well enough that the board has met its duty to rely on a reasonable valuation. They read the summary, the allocation method and the bridge from the latest preferred price to the common value.
• The new investor. A lead investor in a new round inherits the option pool. Its counsel checks that each grant was made at no less than the fair market value in effect on its grant date, because standard financing documents commonly include a representation to that effect, and a breach is the company's problem to fix.
• The fund manager. A fund values its own preferred holdings for its financial statements under ASC 820. Partners notice when the 409A tells a very different story about the company's equity value than the fund's mark does, and they ask why.

VCs rarely want an aggressively low common value. A value that looks engineered creates option holder tax exposure, a messy diligence record and, near an IPO, cheap stock questions from the SEC. Our overview of 409A valuations for VC-backed startups covers how investor expectations shift by stage.

What do auditors look for in a 409A valuation?

Auditors look for evidence that the common stock value used for stock compensation is reasonable. They evaluate the appraiser's competence and objectivity, test whether the method fits the company's stage, check key inputs such as comparable companies, volatility and DLOM against market data, and confirm the valuation date supports each grant date.

The audit hook is ASC 718. Stock options are expensed at grant-date fair value, and the fair value of common stock is the most important input to the option pricing model. That makes the 409A an accounting estimate, and the auditor applies the standards for estimates: AU-C 540 for private company audits under AICPA standards, or AS 2501 for audits under PCAOB standards. Because the estimate comes from an outside appraiser, the auditor also applies the rules for evidence prepared by a management's specialist (AU-C 500, or Appendix A of PCAOB AS 1105).

In practice, that means the audit team works through these steps:

1. The appraiser. Credentials, experience with venture-backed equity, and any relationship with the company or its investors that could impair objectivity.
2. The method. Whether the approach and allocation method suit the company's stage and capital structure, and whether they follow the AICPA Accounting and Valuation Guide on privately held company equity securities issued as compensation, which most audit teams use as their reference.
3. The inputs. Source data, the guideline public companies, volatility, the risk-free rate, the expected term to exit, scenario weights and the DLOM.
4. The math. On larger engagements, the firm's internal valuation specialists may recompute the allocation or build an independent range.
5. The dates. Whether anything happened between the valuation date and each grant date that should have changed the value.

The auditor is not testing Section 409A compliance as such. It is testing whether the expense in your financial statements is fairly stated. The overlap is large, though, because a value that would not hold up for financial reporting is usually weak for tax purposes too.

Auditor vs VC: The 409A Valuation Review at a Glance

The two reviewers read the same report with different goals. The table summarizes where each one looks and what typically triggers follow-up questions.

Methodology Support: Does the Approach Fit the Company?

The first question any reviewer asks is whether the report used the right tools for this company at this date. They are not looking for one correct method. They are looking for a choice that the report explains and that matches the facts.

The most common test is calibration. When the company has closed a priced round recently, the reviewer expects the valuation to reconcile to it, often by solving an option pricing model for the equity value that reproduces the round price (the backsolve method). If the report instead relies mainly on public company multiples or a discounted cash flow and lands far from the round, the auditor will ask why the market evidence was set aside. Our guide to the income, market and cost approaches explains when each one applies.

The second test is the allocation method, the step that splits total equity value between preferred and common stock:

• Option pricing model (OPM). The default for most venture-backed companies with no near-term exit in view. Reviewers check the term, volatility and breakpoints.
• Probability-weighted expected return method (PWERM). Expected when specific exits can be described, such as an IPO in preparation, a sale process or a real risk of wind-down. Reviewers check that the scenario weights match what the board knows.
• Hybrid. Used when one scenario is concrete and the rest are not. Reviewers check that the weighting is explained.

A mismatch here is one of the clearest signals to a reviewer. A company whose board minutes describe an active sale process but whose 409A runs a five-year OPM with no exit scenario will draw questions from both the auditor and any investor who sat in that board meeting.

Comparable Company Selection: Where Reviewers Start Recomputing

Guideline public companies feed a 409A in two places: market multiples, if the market approach is used, and volatility, which almost every option pricing model needs. Because both inputs move the answer, reviewers often rebuild this part of the analysis first.

An auditor's valuation specialist will typically ask:

• Do the peers share the company's business model, customers and risk profile, or only its industry label?
• Are there enough of them to produce a stable volatility estimate, and is the look-back period consistent with the expected term to exit?
• Were any companies dropped since last year, and if so, was it because they were acquired or because their volatility was inconvenient?
• Is the concluded volatility at a sensible point in the peer range, given the company's stage and size?

Consistency matters as much as the selection itself. A peer set that changes every year without explanation, or a volatility that moves while the peers do not, looks like a result chosen before the analysis. Our guide to Black-Scholes volatility inputs walks through how volatility should be sourced and supported.

VCs look at the same list differently. They know how the market prices their company, and they notice when the peers are slower-growing or lower-margin businesses that pull the market multiples down. That observation rarely comes up in a board meeting, but it does come up when a new lead investor's team reads the history in diligence.

The DLOM Basis: Where Reviewers Push Hardest

The discount for lack of marketability (DLOM) reflects the fact that common stock in a private company cannot be sold easily. It is often the largest single judgment in a 409A, and it is the input reviewers challenge most often, because a few percentage points move the concluded value directly.

Reviewers do not expect a particular percentage. They expect a basis. An auditor will look for:

• A model, not a number. Put-option models such as the Chaffe protective put and the Finnerty average-strike put are common, often cross-checked against empirical restricted stock and pre-IPO studies.
• Inputs that match the rest of the report. The DLOM's term and volatility should agree with the OPM's. A five-year term in the DLOM next to a three-year term in the allocation is a frequent finding.
• A direction that matches events. As an exit gets closer, the discount should usually fall. A DLOM that stays flat or rises while the company prepares for an IPO will be questioned.

VCs see the DLOM as a proxy for how far away liquidity is. If the board is discussing a sale within a year while the 409A assumes several years to exit, the investor directors will ask how the two fit together.

The Board Approval Trail: Dates, Minutes and Grant Prices

The quality of the report is only half the review. The other half is whether the company used it correctly. Auditors and diligence counsel both build a timeline that lines up four dates for every grant: the valuation date, the date the board adopted the valuation, the grant date, and the date of any event that might have changed the value.

Under Treasury Regulations Section 1.409A-1(b)(5)(iv)(B), an independent appraisal is presumed reasonable only if it is as of a date no more than 12 months before the grant, and a valuation can stop being reasonable sooner if material information arises after its date. Reviewers therefore look hard at grants made:

• After a signed term sheet or letter of intent, but at the price from the earlier valuation.
• After a large secondary sale or tender offer at a price well above the common value.
• After a major customer win, a product approval or a clear change in the company's outlook.
• By written consent with no record that the board considered the current valuation.

For financial reporting, auditors may go a step further. Even when the 409A was adopted properly, if a grant came shortly before a priced round at a much higher price, the auditor may ask the company to reassess grant-date fair value for the ASC 718 expense. The exercise price stays the same, but the company records more expense. This is the private company version of the cheap stock analysis that the SEC applies before an IPO, covered in our pre-IPO 409A guide. When an event like this happens, the fix is a fresh valuation before the next grant. Our guide to material events that trigger a new 409A lists the usual triggers.

Can an auditor reject a 409A valuation?

An auditor cannot invalidate a 409A for tax purposes, but it can refuse to accept the value for financial reporting. If the method or inputs are unsupported, the auditor may propose an adjustment to stock compensation expense, ask for a revised or new valuation, or report a control deficiency over the estimate.

In practice, outright rejection is rare. The usual sequence is a list of questions to the appraiser, a call to discuss the answers, and sometimes a revised report with better support or a corrected input. Disagreements most often end in a revised report when an input was clearly wrong, such as a volatility built on an outdated peer set, or when a known event was left out of the analysis.

The tax consequences run on a separate track. If a grant's exercise price turns out to be below fair market value on the grant date, the option can fail the stock right exclusion in Treasury Regulations Section 1.409A-1(b)(5)(i) and be treated as deferred compensation. If that deferred compensation does not comply with Section 409A, the option holder faces income inclusion as the option vests, an additional 20% federal tax and a premium interest charge under Section 409A(a)(1)(B), and some states add their own tax. An audit finding does not trigger those consequences by itself, but it can point to grants that need a closer look with tax counsel. Our guides to 409A penalties and to how the IRS evaluates 409A valuations cover the tax side.

What VCs and Acquirers Check in Due Diligence

In a financing or an acquisition, the 409A review moves from "is this number reasonable" to "is the company's grant history clean." Diligence counsel will usually request:

• Every 409A report since the first option grant, with the board consents that adopted them.
• The option ledger, showing grant dates, exercise prices and holders.
• Any secondary sales, tender offers or term sheets during the period.
• Any grants made more than 12 months after the valuation they relied on.

The reviewer then matches each grant to the valuation in effect on its date. Gaps are not fatal, but they cost time. A new investor may ask for a specific representation, a retrospective valuation or a fix before closing. An acquirer may ask the company to address affected options before signing, and the fix can involve repricing options upward or other changes that tax counsel must structure carefully. Because this review looks at the whole history at once, a pattern of small timing gaps can matter more than any single report.

Investors also read the trend. They compare the common value with each preferred round price over time. That ratio usually rises as a company matures and an exit gets closer. A ratio that falls while the business grows, or that stays at an early-stage level into a late-stage round, invites questions about the method. Our 409A valuation benchmarks show typical ranges by stage.

How to Prepare for a 409A Valuation Review

You cannot control what a reviewer asks, but you can control how quickly you answer. Before audit fieldwork or a diligence request, put together a single folder that holds:

1. Each 409A report with its board consent and the date it was adopted.
2. A grant-to-valuation map: every grant, its date and price, and the valuation it relied on.
3. A list of events between each valuation date and the grants that followed, with a note on why none required a new valuation.
4. The appraiser's contact details and a confirmation that the appraiser will answer auditor questions.
5. A short memo on any change in method, peers or DLOM model from the prior year.

The content of the reports themselves, the documentation, methods and red flags that decide whether a report survives review, is covered in our guide to audit-defensible 409A valuations. Our 409A preparation checklist covers the data to gather before the valuation starts.

The Bottom Line on How VCs Assess 409A Valuations and How Auditors Review Them

How VCs assess 409A valuations and how auditors review 409A reports come down to the same two questions: is the number supported, and was it used correctly? Auditors approach those questions through ASC 718 and the auditing standards on estimates and specialists. Investors approach them as directors, as new money inheriting the option pool and, eventually, as sellers. Both look hardest at the methodology fit, the comparable companies, the DLOM basis and the board approval trail.

A 409A valuation review rarely goes wrong because of one bad assumption. It goes wrong when the report and the company's actual history tell different stories. Keep the valuation current, line up every grant with the valuation behind it, and make sure your appraiser can explain each judgment call to a skeptical reader.

This article is general information about valuation practice and the review of 409A valuations, not legal, tax, accounting or audit advice. References to auditing standards describe their general requirements; how an auditor applies them depends on the engagement and the auditor's professional judgment. Whether a particular valuation qualifies for a presumption of reasonableness under Treasury Regulations Section 1.409A-1(b)(5)(iv)(B) depends on the specific facts. Consult your own counsel, tax advisor and auditor about how IRC Section 409A and ASC 718 apply to your company's equity grants.