409A Explained: The Hidden Tax Bill in Your Startup Equity
A company does everything right. Good lawyers. A reputable valuation firm. A board that does its job.
And it still hands an employee a tax bill she never saw coming, on stock she never sold, from options she never exercised.
That scenario is the subject of a recent Letters of Intent episode, where Pankaj Raval and Sahil Chaudry worked through how it happens. The mechanism is a rule most founders think they understand and most do not.
If your company issues options, or if you hold them, this determines what you eventually owe.
What a 409A Actually Is
Start with the misconception. Most people treat a 409A as a valuation you purchase once a year, file away, and forget.
That is not what you are buying.
The name and the origin
Section 409A entered the Internal Revenue Code through the American Jobs Creation Act in 2004 and took effect in January 2005. Final regulations followed in April 2007, and the core rules have stayed remarkably consistent since.
That stability is unusual for tax law.
The provision came out of Enron. Executives accelerated payment on their deferred compensation in the weeks before the company collapsed, while everyone else lost everything. Congress responded by regulating deferred compensation tightly.
What people mean when they say 409A
In common usage, a 409A refers to an independent appraisal of the fair market value of a private company’s common stock.
That fair market value becomes the strike price on employee options. And the strike price determines what an employee eventually pays tax on, because tax falls on the spread between the exercise price and the price at which shares are sold.
The rule itself
Here is the statutory requirement, stated plainly. A nonqualified stock option is exempt from Section 409A only if the strike price is at least equal to fair market value on the grant date.
No discounts. Price at or above fair market value and you are fine.
Go below that line and the option stops being an option in the eyes of the statute. It becomes deferred compensation, which is taxed very differently.
How a Grant Goes Wrong
The episode walked through a composite example. Pankaj and Sahil were explicit that the company is hypothetical, assembled from patterns they have seen, with the details changed to preserve confidentiality.
Call it Meridian Robotics. Six years old, roughly forty people, warehouse automation, Series B, based in Los Angeles.
January
Meridian obtains a 409A valuation from a reputable independent firm. Common stock comes back at $1.10 per share. The board formally adopts it, and the report states in plain language that it is good for twelve months.
All of that is correct and normal.
April
A strategic buyer sends a letter of intent. Non-binding. The number implies roughly $4.20 per share for the common stock, about four times the January figure.
May
Diligence is underway. Meridian hires a VP of operations specifically to help close the deal. She accepts a below-market salary because she is receiving equity.
The board grants her 60,000 options at $1.10, because the January valuation is four months old and everyone knows it lasts a year.
August, and then two years later
The deal dies. That happens constantly, and Meridian keeps building. Nobody thinks about the grant again.
Two years on, a different buyer arrives and this deal closes. During diligence, the buyer’s counsel does something entirely routine. They request the valuation history and the grant history, then lay them side by side.
There it is. A May grant priced off a January number, with a signed letter of intent sitting between them.
Who has the problem
Not the board, and not the founders.
The VP of operations, who took less cash, exercised nothing, sold nothing, and had no vote on any of it.
The Rule Nobody Internalizes
The twelve-month figure in that valuation report is a ceiling, not a guarantee.
The safe harbor from an independent appraisal lasts a maximum of twelve months from the valuation date, or until a material event occurs, whichever comes first.
What counts as a material event
Anything that could significantly affect the value of the company. In practice that means a priced financing round, a signed term sheet or letter of intent, filing an S-1, a secondary sale of shares, a major shift in financial performance, or a down round.
At Meridian, the letter of intent ended the safe harbor in April. The May grant was priced off a valuation that had already expired.
The nuance worth understanding
Sahil raised an important distinction during the episode. A signed LOI does not retroactively invalidate grants made before it.
Going forward, though, the company can no longer claim ignorance. A new number sits on the table, and pricing the next grant at the old figure becomes indefensible.
Pankaj added practical texture. Receiving an LOI does not automatically make your company worth that amount. Someone offering $100 per share does not establish that value by itself, and the legitimacy of the offer matters.
But a signed LOI that leads into diligence is different from an unsigned one you decline. If you sign and proceed, update the valuation. Either way, document what happened so it does not surface awkwardly years later.
The Three Safe Harbors
The IRS provides three paths. In practice, most companies use one.
Independent appraisal
An appraisal by a qualified independent appraiser is the strongest and most common option.
Qualified means something specific. The regulations look for significant knowledge and experience in business valuation, generally five or more years of relevant experience. That usually appears as a credential such as an ASA, CVA, or ABV.
Independence matters just as much. No material financial interest in your company, and no family or employment relationship with management. Your CFO cannot do it. Neither can the CPA who handles your books.
The illiquid startup presumption
This one lets someone inside the company perform the valuation, such as a financially sophisticated board member or a CFO.
It is narrow. The company must be under ten years old with no publicly traded securities, and you cannot be anticipating an IPO within 180 days or a change of control within ninety.
Pankaj noted that plenty of early-stage startups do qualify, and the firm has relied on this safe harbor for companies that are not yet liquid and would rather not spend five to ten thousand dollars. His caution: have an opinion and documentation behind it rather than simply asserting it.
Note also that this option disappears exactly when you would most want it, meaning once you are in a process.
Binding formula
You set a mathematical formula and apply it to every transfer of stock, including buybacks from founders. Rigid, and it breaks the moment you sell the company in an arm’s length deal.
In practice this shows up in closely held family businesses rather than startups.
Choose the Appraiser Carefully
Cost pressure produces bad decisions here.
Plenty of services now offer 409A valuations. Cap table platforms like Carta provide them and Pankaj described those as good options. Other providers, particularly unverified overseas ones, may not produce something defensible.
What defensible means
Ask whether the appraiser could actually stand behind the number if questioned. Someone based in the United States with real credentials and more than five years of experience gives you that.
Expect to pay around five thousand dollars or more. Choosing the cheapest option available risks paying for something that provides no protection when it matters.
What you are actually purchasing
This is the reframe from the episode worth carrying with you.
Inside the safe harbor, your valuation is presumed valid. If the IRS wants to challenge your strike price, they must prove the valuation was grossly unreasonable.
That word matters. The distance between unreasonable and grossly unreasonable is substantial, which is precisely why the qualifier appears throughout contract drafting.
Outside the safe harbor, the presumption flips. You and your employees must affirmatively defend the number years later, with hindsight running against you.
As Sahil put it, you are not buying a number. You are buying a legal presumption. The question is never whether this is the right price. The question is who has to do the proving if someone challenges it three years from now.
Why Employees Bear the Damage
Understanding the consequence explains why this deserves attention.
An option priced below fair market value becomes deferred compensation under the statute. Section 409A permits payment only on six specific events: separation from service, death, disability, change of control, an unforeseeable emergency, or a fixed date set in advance.
A normal stock option does not work that way. The employee decides when to exercise, and that choice is not on the list.
Phantom income
The result is tax on value the employee has not received. She has no cash from the options, no sale, and a bill anyway.
Sahil framed the broader lesson for founders. Any time money or value lands in your pocket, ask your attorney and your CPA how it gets taxed and whether you will have cash available when the tax comes due.
Situations where the IRS values something you hold but cannot readily convert to cash require planning well in advance.
What the employee can do
If you hold options and suspect a pricing problem, ask two questions. What was the valuation date used for your grant, and did anything significant happen at the company between that date and your grant date?
You are entitled to understand how your own strike price was set. A company handling this properly will have a clear answer ready.
Get the Timing Right
409A compliance is inexpensive relative to the exposure. A valuation costs a few thousand dollars. Reclassified options create penalties and personal tax liability for people who had no say in the decision.
Refresh your valuation annually, and refresh it again whenever a material event occurs. A signed letter of intent is a material event, even when the deal later collapses.
Pankaj Raval and our team at Carbon Law Group advise Los Angeles founders on equity compensation, including option grants, safe harbor analysis, board approvals, and the documentation that survives buyer diligence. We coordinate with your CPA, because the legal structure and the tax consequence are one decision.
If you are issuing options, considering a sale, or reviewing grants made in the past, contact Carbon Law Group at carbonlg.com. Spending a little now avoids a great deal later, usually for someone who never had a vote in the matter.
Carbon Law Group’s links: https://linktr.ee/carbonlawgroup