Key Takeaways
- A 409A valuation is an appraisal of a private company's common stock, used to set the exercise price of employee stock options at or above fair market value on the grant date
- An option priced below fair market value is treated as deferred compensation; if it fails Section 409A, the holder owes income tax on vested amounts plus an additional 20% tax and interest
- The Treasury regulations give three safe harbor methods; the most common is an independent appraisal dated no more than 12 months before the grant
- A safe harbor shifts the burden to the IRS, which must then show the value was grossly unreasonable
- Refresh the 409A at least every 12 months and after any material event: a priced round, a large SAFE raise, an acquisition offer or a big change in revenue
- The 409A price of common is normally well below the price investors pay for preferred stock, because preferred carries a liquidation preference and other rights
- The 409A is a tax and accounting number, not your fundraising valuation, and investors do not use it to price a round
A 409A valuation is an independent appraisal of a private company's common stock that sets the minimum exercise price for employee stock options. Pricing options at or above that fair market value keeps them outside Section 409A's deferred compensation rules. Startups need one before the first option grant, then at least every 12 months and after any material event.
This guide is general information, not tax or legal advice. Your counsel and valuation provider should confirm how the rules apply to your company and each grant.
Why does a startup need a 409A valuation?
Because an option granted below fair market value is deferred compensation, and deferred compensation that fails Section 409A is taxed immediately with a 20% penalty on top.
Section 409A of the Internal Revenue Code governs nonqualified deferred compensation. The Treasury regulations under Section 409A exclude stock options from those rules only if the exercise price can never be less than the fair market value of the underlying stock on the date of grant. Grant an option below that value and the exclusion falls away.
If a discounted option fails 409A, the consequences land on the employee, not the company:
The company carries the cost through withholding failures and a diligence finding that a Series A investor will ask you to fix.
Do incentive stock options have the same rule?
Yes, and a stricter one. Under Section 422, an incentive stock option (ISO) must carry an exercise price of at least fair market value at grant. For anyone holding more than 10% of the company's voting power, the price must be at least 110% of fair market value and the option term no longer than five years. Only the first $100,000 of stock (measured at grant-date value) that becomes exercisable in a year qualifies as ISOs; the excess is treated as non-qualified options. The company also reports ISO exercises to the IRS and employees on Form 3921, so the grant-date value follows the option for its whole life.
What is the 409A safe harbor?
The safe harbor is a set of three valuation methods that the IRS presumes reasonable; if you use one, the IRS can challenge the value only by proving it was grossly unreasonable.
The regulations at 26 CFR 1.409A-1(b)(5)(iv) list them:
Without a safe harbor, the company still has to use a "reasonable valuation method", but it carries the burden of proving the method was reasonable if the IRS disagrees. That is a weak position to defend years later with a different cap table.
When do you need a new 409A valuation?
Get one before the first option grant, refresh it at least every 12 months, and refresh it immediately after any event that could materially change the value of the common stock.
The regulations say a previously calculated value stops being reasonable if it fails to reflect information available after the calculation date that may materially affect value, or if it was calculated more than 12 months earlier. In practice, these events usually trigger a refresh:
The common mistake is a stale report. A company closes its seed round in March, keeps granting options off last year's 409A through the summer, and discovers at Series A diligence that every grant since March may be underpriced. The fix is retroactive repricing or a tax gross-up, both expensive. Freeze grants from the day a priced round signs until the new report arrives.
How is a 409A valuation calculated?
Providers value the whole company first, then allocate that value across the share classes, then apply a discount because common stock in a private company cannot be sold.
The steps:
The result is a per-share common price usually far below the preferred price investors just paid. That gap is normal, and it is why early employees receive meaningful option value.
What will the provider ask for?
Have these ready, ideally in one folder:
How is a 409A different from your fundraising valuation?
The 409A values one share of common stock for tax purposes; your fundraising valuation is the negotiated price of preferred stock in a specific deal.
Investors do not price a round off your 409A, and a low 409A does not signal a weaker company.
What else depends on the 409A number?
Option grants, securities-law disclosure, financial statements and future diligence all read from the same number.
How do you choose a 409A provider?
Pick a provider that is independent, documents its methods in a report your auditors will accept, and turns refreshes around quickly after a financing.
Criteria worth checking:
Fees scale with cap-table complexity. Treat the fee as insurance on every option you grant over the next year.
What are the most common 409A mistakes?
Most problems come from timing, not from the valuation method.
Investor-standard documents assume a clean option history. The NVCA model legal documents include representations about capitalization and option grants that the company signs at closing, so a 409A gap becomes a disclosure problem in your next round.
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What is a 409A valuation in simple terms?
It is an independent appraisal of what one share of a private company's common stock is worth. Startups use it to set the exercise price of employee stock options. Pricing options at or above that value keeps them outside the Section 409A deferred compensation rules and the 20% additional tax.
How often do startups need a 409A valuation?
At least every 12 months, and immediately after any material event such as a priced round, a large SAFE raise, an acquisition offer or a major change in revenue. The regulations treat an older value, or one that ignores later material information, as no longer reasonable. Most companies pause option grants until a fresh report arrives after a financing.
Does a SAFE round require a new 409A valuation?
Not automatically, but a significant SAFE raise is information that may materially affect the value of common stock. Many valuation providers and counsel treat it as a refresh trigger. Ask your provider before granting options after a SAFE round closes.
Why is the 409A price lower than the price investors paid?
Investors buy preferred stock, which is paid first in a sale and carries other rights. Common stock gets what remains and cannot be sold easily, so the appraiser allocates less value to it and applies a marketability discount. A large gap between the two prices is normal at early stages.
Is a 409A valuation the same as a pre-money valuation?
No. A 409A values common stock for tax and accounting purposes and is set by an independent appraiser. A pre-money valuation is the negotiated price of the company before new preferred money comes in, and it determines investor ownership.
What happens if options were granted without a valid 409A?
If the exercise price was below fair market value, the options can fall under Section 409A, and holders may owe tax on vested amounts plus a 20% additional tax and interest. Companies usually fix the problem by repricing affected options before they vest or are exercised, under advice from tax counsel. The issue also tends to surface in the next round's diligence.