Founder Equity, Stock Options, and the 409A Valuation
Author: Redwood Valuation Content Team
Published: July 28, 2026
The moment your startup grants stock options to employees or contractors, Section 409A of the Internal Revenue Code becomes your concern. The core rule is straightforward: the strike price needs to be supported by a defensible fair market value (FMV) determination for the company's common stock. Granting options below that value can create a significant tax problem for the people who received the options.
For founders setting option strike prices, 409A isn't a valuation standard. It's a tax regime that makes the valuation matter. The valuation is what determines whether the penalty rules are triggered.
A lot of 409A content frames the issue too narrowly. That can lead to real compliance risks that tend to fall on the people least equipped to absorb them: the employees holding the options.
| Topic | Practical Point |
|---|---|
| What 409A governs | Nonqualified deferred compensation; discounted compensatory stock options can be treated as deferred compensation |
| Who bears the penalty | The employee or contractor (service provider), not the company |
| The penalty | Income recognized when the option vests + 20% additional income tax + premium interest |
| The standard | Fair market value (FMV) of common stock at grant date |
| Safe harbor methods | Three: independent appraisal (M1), formula-based (M2), illiquid start-up stock (M3) |
| IRS rebuttal standard (inside safe harbor) | "Grossly unreasonable" (high bar) |
| IRS rebuttal standard (outside safe harbor) | No presumption; taxpayer must show the valuation was reasonable under the facts and circumstances |
Why Your Option Grants Are Subject to IRC Section 409A
IRC Section 409A governs nonqualified deferred compensation (NQDC). In the stock option context, an option granted below the fair market value of the underlying common stock at the grant date can be treated as nonqualified deferred compensation under 409A. That can trigger income inclusion when the option vests, a 20% additional income tax, and premium interest charges.
That last piece matters more than people expect. The 20% charge under 409A is an additional income tax, not an excise tax. And it falls on the employee who received the option, not the company. That is why the FMV determination needs to be part of the grant process, not a cleanup item after options have already been issued.
What the employee faces if options are granted below FMV:
Income recognized at vesting (not at exercise, as with a properly granted option)
A 20% additional income tax on that income amount
Premium interest computed from the year the compensation was initially deferred, or the first year it vested, whichever is later
What the company faces:
Withholding and reporting obligations, including W-2 box 12 code Z for employees and applicable Form 1099 reporting for non-employees where Section 409A income is involved
Potential gross-up liability if the employment agreement requires the company to make employees whole
Legal and financial statement audit costs
The Section 409A taxpayer is the service provider (the employee or contractor who received the option). A founder who grants discounted options isn't just creating a company compliance issue in the abstract. They're creating a tax problem for the people they hired, before those people can sell a share to pay it.
The standard for “not discounted” is the fair market value of the common stock. In the 409A context, “fair market value” is not the same as “fair value” under the ASC 820 standard used in financial reporting. Both concepts involve valuation, but they are different frameworks serving different purposes. In an ASC 820 context, the question is generally what price would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. For 409A, the question is whether the option strike price was at least equal to the fair market value of the common stock on the grant date. That is the standard that connects directly to how your strike price gets set.
How the Strike Price Connects to Section 409A
Every compensatory stock option grant should carry a strike price at or above the fair market value of the common stock on the grant date. Not the preferred stock price from your last funding round. Not the price your board approved without a valuation. The fair market value of the common stock, on the date of grant.
The preferred stock price is not the fair market value of common stock. Preferred stock carries liquidation preferences and other economic rights that make it more valuable than common stock at early stages. A backsolve analysis or Subject Company Transaction Method, using the company's own preferred stock financing as the observed transaction, derives a common stock value from preferred round data. That result is different from the preferred price per share.
Board approval of a strike price is governance best practice. It doesn't substitute for a defensible FMV determination under the Treasury Regulations. A board can approve a strike price, but the price still needs to meet or exceed FMV under one of the established methods. The board process should be paired with valuation support, not treated as a substitute for it.
The Treasury Regulations provide three safe harbor methods for supporting a defensible FMV determination.
The Three Safe Harbor Methods
Treasury Regulation Section 1.409A-1(b)(5)(iv)(B) provides three methods that can create a presumption of reasonable FMV for private company stock. Use one of them correctly, and the IRS can rebut the valuation only by showing that the valuation method, or the application of that method, was "grossly unreasonable." The valuation receives a rebuttable presumption of reasonableness.
Outside safe harbor, that presumption disappears. A company may still have a reasonable valuation, but it doesn't get the same rebuttable presumption. The question becomes whether the method and its application were reasonable under the facts and circumstances as of the valuation date.
Method 1: Independent Appraisal
Under Method 1, a qualified independent appraiser performs the valuation. The appraisal must meet the requirements of Section 401(a)(28)(C), and the valuation date must be no more than 12 months before the grant.
This is usually the standard path after a first institutional funding round. Investors and legal counsel expect it, and it provides the strongest evidentiary foundation if the valuation is ever challenged. In practice, boards, counsel, auditors, and investors will expect a written valuation, even though the regulatory safe harbor is framed around the independent appraisal itself.
Method 2: Formula-Based
A consistent formula reflecting FMV is applied to transactions involving the same class of stock. The consistency requirement is the limiting factor here. For startup equity programs, where grant activity varies and the cap table changes with each round, meeting that consistency requirement is difficult in practice. Method 2 works better for mature businesses with predictable transaction patterns.
Method 3: Illiquid Start-Up Stock
Method 3 is the one many early-stage founders should understand. A written valuation is required, and the valuation can be performed by a person the company reasonably determines is qualified. That can include someone internal to the company.
The main qualifying conditions are:
The company, including any predecessor, has not conducted a material trade or business for 10 years or more
No class of the company's equity securities is traded on an established securities market
The stock being valued is not subject to a put, call, or other right or obligation to purchase it, except for permitted rights such as certain rights of first refusal or lapse restrictions
No change of control is reasonably anticipated within 90 days
No public offering of securities is reasonably anticipated within 180 days
The third condition is easy to overlook because startup equity documents often include repurchase rights or transfer restrictions. Those terms need to be reviewed rather than assumed harmless.
The illiquid start-up method becomes unavailable if the qualifying conditions are not satisfied. When a public offering or a change of control becomes reasonably anticipated within the regulatory windows, the company will need to use a different safe harbor path.
Method 3 for Early-Stage Startups: When Internal Valuations Work
Method 3 explicitly allows a valuation performed by someone inside or closely affiliated with the company, as long as the qualifying conditions are met and the person is qualified. Many founders assume internal valuations are automatically disqualified. They're not.
The bar is competence, not credentials alone. The regulation requires the company to reasonably determine that the person is qualified based on significant knowledge, experience, education, or training. A CPA with years of business valuation work, or someone with a Chartered Financial Analyst (CFA) designation and valuation experience, could meet that standard. Where internal Method 3 valuations fail is often on that competence threshold.
The illiquid start-up method also requires a written valuation. That report is not just best practice; it is part of the safe harbor requirement.
The transition question matters too. When conversations about a public offering or change of control become real, the illiquid start-up method may no longer be available. After a first institutional funding round, most companies commission a third-party appraisal by a qualified appraiser. By that stage, the cap table is often more complex, investors and counsel expect the stronger evidentiary path, and the qualifying conditions for the illiquid start-up method can be harder to satisfy.
Understanding 409A also means understanding how it connects to IRC Section 83, a different rule that governs founder equity and the 83(b) election.
Your Founder Stock and the 83(b) Election
Many founders receive restricted stock, not options. That distinction matters because restricted stock is governed by IRC Section 83, while employee stock options raise a separate Section 409A issue if they are granted below fair market value. The 83(b) election can significantly reduce a founder's tax bill when it applies, but it applies to restricted stock and to early exercise of unvested options. It does not apply to a standard stock option grant.
Here's why: Section 83 governs property transfers subject to a substantial risk of forfeiture. At a standard option grant, no property is transferred. The property transfer happens at exercise, so there is nothing for the 83(b) election to apply to at the grant stage.
What the 83(b) election applies to:
Restricted stock grants (subject to vesting)
Early exercise of unvested options (exercising before vesting, resulting in unvested shares)
What it does not apply to:
Standard option grants (no property transferred at grant)
Exercise of already-vested options (no substantial risk of forfeiture)
The 30-day filing window runs from the property transfer date, not from any option grant date. For restricted stock, that's the date the stock is issued. For early exercise, it's the exercise date. There's generally no routine fix for missing that window.
For founders, this can matter a lot. If you receive restricted stock at incorporation when the company is worth very little, a timely 83(b) election lets you include the current stock’s value, less what you paid for it, in income now. At incorporation, that amount is often little or nothing. Future appreciation is then generally taxed under capital-gain rules, assuming the stock is held and disposed of in a way that qualifies. The dollar difference at exit can be substantial.
If options were granted below FMV, early exercise doesn't fix the 409A problem. The Section 409A violation is created at grant. Early exercise and an 83(b) election address Section 83 timing; they don't cure a 409A issue that already exists.
When to Get a 409A Valuation (and When to Update It)
Before issuing options, the company should have a defensible fair market value determination for the common stock so it can support setting the strike price at or above FMV. Under the independent appraisal safe harbor, the valuation date must be no more than 12 months before the grant. That's a regulatory requirement, not a guideline.
A valuation can also become unreliable before that 12-month mark. If material new information emerges that could affect the company's value, the prior valuation may no longer support a new grant even if it's within 12 months. That caveat matters every time someone invokes the 12-month rule.
Events that commonly prompt consultation with your appraiser are not automatic triggers. The assessment is facts-and-circumstances-based, but the list often includes:
Closing a new preferred stock funding round
Signing or losing a significant customer contract
Departure of a key executive
A secondary transaction in common stock
Entering or exiting a business line
After a funding round, attorneys commonly recommend refreshing the 409A within approximately 90 days. That's industry practice, not a regulatory deadline. The regulation requires the valuation to reflect the company's condition at the time of the grant, which is a facts-and-circumstances question, not a calendar rule. Before issuing any post-round grants, consult with your valuation firm rather than assuming the pre-round report still holds.
On timing and cost, the process typically takes 3-4 weeks once the appraiser has the information needed. That usually includes historical financials to the extent available, business updates, financing documents, forecasts or budgets, and cap table details. Cost varies by company stage and complexity, generally ranging from $4,000 to $10,000 or more for most early-to-mid-stage companies working with a credentialed valuation firm.
The Five Most Common 409A Mistakes Founders Make
1. Granting options before any FMV analysis. Without a safe harbor method, there is no presumption of reasonableness to rely on and no grossly unreasonable rebuttal standard to protect the valuation. The valuation may still be tested under the facts and circumstances, and the risk falls on your employees.
2. Using a stale valuation. The 12-month limit is regulatory. A valuation from 14 months ago doesn't support today's grant. Neither does a valuation that fails to reflect material information that emerged after the valuation date, even if the valuation is technically within 12 months.
3. Assuming the preferred round price equals the FMV of common stock. The preferred price reflects preferred-specific economics, such as liquidation preferences, conversion rights, anti-dilution protection, and dividend preferences. Backsolve analysis can derive a common stock value from the preferred transaction, but the result is typically lower than the preferred price. These are different numbers.
4. Treating board approval as an FMV determination. The board can approve a strike price, but approval doesn't establish FMV. A defensible method under the Treasury Regulations is what supports FMV. Board approval is governance; it is not a substitute.
5. Conflating founder restricted stock with employee options. Your 83(b) election, the Section 83 rules governing your own equity, and Qualified Small Business Stock (QSBS) treatment all operate under different statutes from the 409A mechanics that govern the options you issue to employees. The rules for your equity and the rules for your employees' equity are not the same framework.
A note on retrospective valuations: If your startup issued options in the past without a proper FMV analysis, that doesn't mean those grants are unaddressable. A valuation can sometimes be prepared today with a retrospective effective date, as long as it relies only on information that was known or reasonably knowable at that earlier date. That can help assess and document the position, but it isn't the same as having contemporaneous safe harbor support, and it doesn't automatically cure a discounted grant. Consult with your appraiser and counsel to assess whether a retrospective analysis makes sense for your situation.
If you're concerned about how a prior grant might hold up under examination, the central question is whether the strike price was supported by a reasonable FMV determination using information that was known or reasonably knowable at the relevant date.
The Bottom Line
Getting 409A right protects the people you're trying to compensate. A discounted option grant creates a tax problem for employees not just in the abstract, but concretely at vesting, before they can sell a share to cover it.
Courts have addressed this directly. In Sutardja v. United States (2013), the Court of Federal Claims held that discounted stock options may be subject to Section 409A. The compliance framework exists, and using one of the three safe harbor methods correctly is the clearest way to stay inside it.
If you're about to grant stock options or have questions about an existing valuation, Redwood Valuation's team of American Society of Appraisers (ASA) and Accredited in Business Valuation (ABV)-credentialed appraisers can help you evaluate your situation.
Frequently Asked Questions
Do I need a 409A valuation before my first employee option grant?
Yes. Every compensatory option grant requires a defensible fair market value determination. Without one, you lose the rebuttable presumption of reasonableness, and the IRS can challenge the valuation under a facts-and-circumstances standard. That's a lower bar than the "grossly unreasonable" standard that applies when you're inside a safe harbor.
Can my startup do its own 409A valuation?
Under Method 3 (the illiquid start-up method), yes, in limited circumstances. The company must satisfy the illiquid start-up conditions: no material trade or business conducted for 10 years or more, no publicly traded equity securities, no disqualifying put, call, or purchase rights on the stock, no reasonably anticipated public offering within 180 days, and no reasonably anticipated change of control within 90 days. The person who performs the valuation must be qualified based on significant knowledge, experience, education, or training. A written valuation is required.
What's the difference between fair market value and fair value?
Fair market value (FMV) is the Section 409A tax concept generally focused on what a willing buyer and willing seller would agree to for the common stock in an arm's-length transaction as of the grant date. "Fair value" is the standard under ASC 820, a GAAP measurement framework used in financial reporting, based on exit price from a market participant's perspective. The two are different frameworks serving different purposes. Using "fair value" language in a 409A context is a terminology error that can create problems if the valuation is ever challenged.
How often do I need to update my 409A valuation?
The valuation date must be no more than 12 months before any grant. It can also become unreliable before that if a material event occurs, such as a new funding round or a significant operational change. The 90-day refresh that attorneys often recommend after a funding round is industry practice, not a regulatory deadline.
What happens to my employees if we granted options below FMV?
The employees who received those options may face income inclusion at vesting, a 20% additional income tax on that income, and premium interest charges. The company faces withholding and reporting obligations. The tax burden lands on the employee, not the company, which makes this an employee relations problem as much as a compliance one.
Can an 83(b) election protect employees from a below-FMV option grant?
No. The Section 83(b) election applies to restricted stock and to early exercise of unvested options. It doesn't apply to a standard option grant because no property is transferred at grant. And if options were granted below FMV, early exercise doesn't cure the 409A problem. The violation is created at grant.
When does the illiquid start-up method stop being available?
The illiquid start-up method (Method 3) becomes unavailable when its qualifying conditions are no longer satisfied. That includes a reasonably anticipated public offering within 180 days or a reasonably anticipated change of control within 90 days. It can also become unavailable if the company's age, public trading status, or stock rights no longer fit the regulation. In practice, most companies commission a third-party qualified-appraiser report after their first institutional funding round, when investors and counsel expect the stronger evidentiary path and the company's cap table complexity warrants it.
Redwood Valuation Partners is a business valuation firm serving companies at all stages, from early-stage startups to established enterprises. Our credentialed team (ASA, CFA, ABV) provides 409A valuations, fairness opinions, ASC 820 portfolio valuations, and litigation support services. We work with founders, legal counsel, fund managers, and CFOs who need defensible valuations backed by regulatory expertise.