409A Valuation Explained: What It Is, Why You Need One, and How It Works

Your lawyer said "you need a 409A." Here's what that actually means.

A 409A valuation is an independent appraisal of the fair market value of your company's common stock. It's named after Section 409A of the Internal Revenue Code↗, enacted in 2004 as part of the American Jobs Creation Act. The regulation was a direct response to the Enron scandal, where executives manipulated stock option pricing for personal gain. Congress closed the loophole by requiring that stock options be granted at or above fair market value — and that FMV be determined by a defensible, independent process.

The practical consequence for you: if you grant stock options priced below FMV, the IRS imposes penalties on the option holders. Not on the company. On the employees. Under IRC §409A(a)(1)↗, those employees face immediate taxation of all vested deferred compensation, an additional 20% federal penalty tax, plus interest charges calculated from the date of vesting. In California, add another 5% state penalty on top. A $50,000 option grant can generate a $20,000+ tax bill on an employee who has never received a dollar of liquidity.

That's the reason your lawyer brought it up. Not because the IRS is watching your seed-stage startup. Because the penalties are severe, they fall on the people you're trying to attract, and the risk compounds with every grant you issue without a current valuation.

What the valuation actually produces

A 409A valuation produces a signed, written report from an independent appraiser that establishes the fair market value of one share of your common stock. That FMV becomes your strike price — the price employees pay to exercise their options.

This is not your fundraising valuation. Investors pay for preferred stock, which comes with liquidation preferences, anti-dilution protections, board representation, and information rights. Common stock has none of those protections. A willing buyer pays less for common than preferred — and the 409A reflects that difference. If you raised at a $20M post-money valuation, your common stock might be valued at $1.50 per share. Both numbers are correct. They measure different things. (For a deeper explanation, see Why Your 409A Is Always Lower Than Your VC Valuation.)

The report itself is typically 30–60 pages. It documents the company's business, financial position, capital structure, and the methodology used to arrive at the FMV conclusion. The length isn't vanity — it's the audit trail that protects you if the IRS or an auditor ever questions the number.

How the appraiser arrives at the number

Three valuation approaches exist under Revenue Ruling 59-60↗ and the AICPA Valuation Guide↗:

Market Approach. The appraiser identifies comparable public companies and recent private transactions in your industry, derives valuation multiples (typically revenue or EBITDA), and applies them to your financials. This is the most common approach for venture-backed startups because it's anchored to observable market data. After a priced round, the appraiser can also use the backsolve method — starting from the price investors just paid for preferred stock and working backward to derive common stock value. (See 409A Backsolve Explained for the full mechanics.)

Income Approach. The appraiser projects your future cash flows and discounts them to present value using a risk-adjusted discount rate. This approach is most useful for revenue-stage companies with projectable cash flows. Pre-revenue startups typically don't have the financial data to support it.

Asset Approach. The appraiser values your net assets (tangible and intangible). This is the fallback for pre-revenue companies with no financing history and minimal comparable data.

After determining enterprise value, the appraiser allocates that value across all share classes — preferred, common, options, SAFEs, warrants — based on their economic rights. This allocation step (usually performed using an Option Pricing Model) is where the common stock value is derived. Finally, a Discount for Lack of Marketability (DLOM) is applied, typically 15–35% for startups, reflecting that private stock can't be freely traded on a public market.

The result: a specific dollar amount per common share, documented and signed.

Safe harbor: the reason you're doing all of this

The entire point of a 409A valuation is to obtain safe harbor protection. Under Treasury Regulations §1.409A-1(b)(5)(iv)↗, if your valuation meets specific requirements, the IRS presumes it reflects fair market value. The burden of proof shifts to the IRS — they must demonstrate your valuation is "grossly unreasonable" to challenge it. That's an extraordinarily high bar.

Without safe harbor, the burden is on you. In an audit, that's the difference between "your report is presumed correct" and "prove to us why this number is right."

Safe harbor requires three conditions: the valuation must be performed by a qualified, independent appraiser; it must be documented in a signed, written report; and it must be dated within 12 months of the grant date with no material event in between. Miss any one of these and you lose the presumption. (For a complete breakdown of the five requirements, see 409A Safe Harbor: The Legal Shield Every Startup Needs.)

The 12-month clock is absolute. There is no grace period. Once your valuation expires, every option grant you issue lacks safe harbor protection until you obtain a new one. Annual refreshes aren't optional — they're the cost of continuous compliance.

What this means for you right now

If you're about to grant stock options and you don't have a current 409A, stop. Get one first. The cost of a valuation (see current pricing) is trivial compared to the penalties your employees face if the IRS challenges grants issued without safe harbor.

If you already have a 409A, check the valuation date. If it's more than 12 months old, or if a material event has occurred since (a funding round, major revenue change, key personnel change), you need a refresh before your next grant.

Express 409A delivers IRS-compliant valuations in 48 hours. Prepared by an investment banking team, not an algorithm. Every report includes a board resolution draft and strike-price schedule so you can act on the number immediately. No call required — upload your documents, and we start the same day.

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