Sep 11, 2026
Funding

409A valuation: the common-stock price behind option grants

A 409A valuation sets a defensible fair-market-value reference for private-company option prices, separate from a startup’s headline funding valuation.

Marcus Adeyemi

By Marcus Adeyemi · Startups Editor

· 5 min read

A 409A valuation is an appraisal of the fair market value, or FMV, of a private company’s common stock. For a startup granting options, it supplies the per-share value used to support an exercise price at or above FMV under Section 409A of the U.S. tax code. The figure is used for equity compensation, and it is separate from the valuation announced in a venture round.

The distinction can be easy to miss after a fundraise. Investors may pay a stated price for preferred shares, while an employee option typically covers common stock. Those securities can carry different economic rights, so a funding-round price cannot be copied directly into the option strike price.

What is a 409A valuation used for?

Private-company shares do not have a continuously quoted public-market price. A 409A appraisal establishes a supportable FMV for common stock on a particular valuation date. The board can use that conclusion when setting the exercise price, also called the strike price: the amount an option holder would pay to buy a share after exercising an option.

Section 409A addresses nonqualified deferred compensation. In the option context, the practical concern is whether an option was granted below the stock’s FMV. Options priced below FMV can produce adverse tax consequences, including taxes and penalties for recipients.

Why the 409A figure differs from a fundraising valuation

A financing valuation is the negotiated price for a new investment and commonly reflects the price paid for preferred stock. Preferred holders may have rights and protections, including liquidation preferences, that common holders do not have.

A 409A analysis instead asks what one share of common stock is worth, accounting for the company’s full capital structure. The analysis may also reflect that private-company common stock is illiquid. Common-stock FMV can therefore be lower than the latest preferred-share price without either number being an error.

For the financing side of that distinction, see how startup valuation sets the price of a round. A round prices the securities sold to investors; a 409A supports the price at which options on common shares are granted.

The path from company value to an option price

  1. Estimate enterprise value. The appraiser evaluates the business using facts appropriate to its stage, financial condition and market. Common approaches include the market approach, which uses comparable companies or transactions; the income approach, which considers expected cash flows; and the asset approach, which looks at net assets.
  2. Allocate value across the securities. The company may have common stock, several preferred series, options, warrants or convertible instruments. The allocation reflects the rights and preferences attached to each class. An option-pricing model, or OPM, is one method used in more complex capital structures.
  3. Conclude a common-stock FMV per share. The result is a per-share common-stock value that supports option exercise prices. There is no universal formula because the inputs, security terms and facts differ across companies.

A simplified illustration

Assume an appraiser estimates a company’s total equity value at $20 million after considering the business and its capital structure. The appraiser does not divide $20 million by every share outstanding as though every share had identical rights. It first models the claims of preferred and common holders, then reaches a value attributable to common stock. If that allocation attributes $4 million to 4 million common shares, the indicated common-stock FMV is $1 per share. An option grant could use $1 as its exercise-price reference, subject to the company’s actual valuation report and grant process.

The example does not imply that a $20 million financing valuation produces a $1 common-stock price. The allocation, the share count, investor preferences and the company’s circumstances determine the conclusion.

When a company needs to refresh a 409A valuation

Companies typically obtain a valuation before initial option grants, then refresh it at least every 12 months or sooner if a material event could affect the company’s value. The relevant issue is substance, not a fixed checklist: an event is material if it could meaningfully change the value used to price common stock.

  • A new financing round or significant secondary activity.
  • A major product launch, regulatory clearance, partnership or other operating milestone.
  • A significant change in performance, such as a major customer win or loss, rapid growth or a change in margins.
  • A substantial cash infusion, new debt, recapitalization or another change to the capital structure.
  • Developments around a potential IPO, acquisition or other liquidity event.

A fresh priced round is a common trigger because it supplies new evidence about the company and its securities. It still does not dictate common-stock FMV. The valuation analysis accounts for what was sold in the round and the rights attached to it.

What “safe harbor” means

A qualified, independent appraisal may provide 409A safe-harbor protection. In broad terms, that gives the valuation a presumption of reasonableness unless the IRS shows it was grossly unreasonable, provided the applicable conditions are met. Safe harbor is not automatic because a company labels a report “409A,” and a valuation may need updating after 12 months or an intervening material event.

For operators, the practical sequence is to obtain an independent appraisal before granting options, use the concluded common-stock FMV to support the strike price, and reassess after financing, major business changes or at the 12-month mark.

Frequently asked questions

How does a 409A valuation differ from a post-money valuation?

A post-money valuation is the negotiated value of a company after a financing round and commonly relates to preferred shares sold to investors. A 409A valuation concludes the fair market value per share of common stock for option-pricing purposes. Preferred shares may have rights and protections that common shares lack, so the figures need not match.

When does a company need to update a 409A valuation?

Companies typically refresh a 409A valuation at least every 12 months, or sooner after a material event that could affect value. Common examples include a financing round, a major operating milestone or performance shift, a capital-structure change, or developments toward an IPO or acquisition.

What is 409A safe harbor?

Safe harbor is a presumption that a valuation is reasonable when the applicable requirements are met, including use of an independent, qualified appraiser. It does not make every report immune from scrutiny: a valuation may need updating after a material event, and the presumption can be challenged if the valuation was grossly unreasonable.

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