What Is a 409A Valuation?
A 409A valuation is an independent appraisal of the fair market value (FMV) of a private company's common stock. The name comes from Section 409A of the US Internal Revenue Code, which created the rules for deferred compensation — including stock options.
The practical purpose is to set the strike price for option grants. Options granted at or above FMV are not immediately taxable; options granted below FMV are immediately taxable as deferred compensation, with penalties for both the employee and the company. So getting the FMV right is the difference between a clean equity program and a tax catastrophe.
In Europe, there is no exact 409A equivalent, but the same principle applies: option strike prices must be set at FMV at grant date, and FMV is typically established by an independent valuation. The UK has the EMI scheme with HMRC-approved valuation processes. France has BSPCE with similar valuation requirements. Germany has no specific safe harbour but requires FMV documentation for any real-share option program.
How a 409A Valuation Works
Step 1 — Engagement: the company engages an independent valuation firm. Cost typically €3K–€15K depending on company size and complexity. Big-4 firms charge more; specialist 409A providers charge less.
Step 2 — Information gathering: the valuation firm reviews financials (P&L, balance sheet, cash flow projections), cap table, prior round terms, recent secondary transactions, and comparable company data.
Step 3 — Methodology selection: the firm applies one or more standard valuation approaches — discounted cash flow (DCF), market comparables, asset approach. For a typical Seed/Series A startup, market comparables (multiples of revenue or ARR) and DCF are most common.
Step 4 — Allocation to common: the firm computes enterprise value and allocates it across the cap table using an option pricing model (Black-Scholes) or probability-weighted expected return method (PWERM). The output is FMV per common share — which is materially lower than the preferred share price from the last round, due to preferences and other rights.
Step 5 — Report: the firm issues a written valuation report, typically 40–80 pages, documenting methodology, assumptions, and conclusions. This is the document that establishes the safe harbour and goes into your [data room](/dataroom).
Step 6 — Validity period: the valuation is valid for 12 months from the date of issue, or until a "material event" (new funding round, acquisition discussion, major business change). After expiry or a material event, you need a new valuation before granting any new options.
Key Terms and Definitions
Fair Market Value (FMV): the price at which a willing buyer and willing seller would transact in an arm's length transaction. The required strike price for option grants.
Safe harbour: a 409A valuation by a qualified independent firm creates a presumption that the FMV is correct. The IRS (or local tax authority) can rebut this presumption only with clear evidence of error. Without safe harbour, the company carries the burden of proof in any audit.
Material event: a change that significantly affects the company's value — a new funding round, a definitive acquisition discussion, a major business change. Triggers the requirement for a new valuation before further option grants.
12-month rule: a 409A is presumed valid for 12 months from issuance unless a material event occurs. After 12 months, a refresh is required.
Common vs. preferred FMV: common shares are typically valued at a 60–85% discount to preferred shares at early stages, narrowing toward 100% as the company matures. The discount reflects the preferences and rights that preferred holders have and common holders do not.
EMI / BSPCE / VSOP: country-specific equivalents. UK EMI has HMRC-approved valuation processes with favourable tax treatment. France BSPCE has similar tax-advantaged structure. Germany typically uses VSOP (phantom stock) to avoid the notarial requirements of real share grants.
Why 409A Valuations Matter for Founders
The first reason is tax safety. Granting options below FMV without a defensible valuation creates immediate tax liability for the employee (the discount is treated as deferred compensation), additional penalties, and ongoing complexity. A €3K valuation prevents tens of thousands in potential tax exposure across a single grant.
The second reason is timing. You need a current valuation BEFORE granting options after any material event — typically a new funding round. The classic mistake is granting options to a senior hire in the week between Series A closing and the new 409A being issued. Either delay the grant until the new 409A is ready, or use the old (lower) valuation explicitly knowing that the IRS could later argue the FMV was higher.
The third reason is hiring competitiveness. A lower common FMV means a lower strike price, which means more in-the-money value for the option holder at exercise. The 409A process exists partly to legitimise the legitimate gap between common FMV and the preferred round price. Don't try to manipulate the valuation lower — that's how safe harbour is lost — but make sure the firm correctly applies the discounts for lack of marketability, preferences, and protective provisions.
The fourth reason is European specifics: choose the right wrapper for your jurisdiction at the start. UK EMI options carry significant tax advantages and a streamlined HMRC valuation. French BSPCE similarly. German VSOP avoids notarial complexity but loses capital gains treatment. Get jurisdiction-specific advice before incorporating your equity plan.
Common Scenarios
Post-Series A new hire: company closes Series A on day 1, hires a VP Engineering on day 30, needs to grant 1% equity. New 409A is in process but not yet issued. Best practice: delay grant 30 days until new 409A lands. Acceptable practice: grant at old 409A FMV with explicit board acknowledgement and risk acceptance.
Stale 409A at month 13: company has not commissioned a new valuation, options are still being granted at month-12 strike price. IRS audit could disallow the grants. Resolution: commission new 409A immediately, re-paper open grants at the current FMV.
Acquisition discussion in progress: company is in due diligence with a potential acquirer. A new 409A is required because the discussion is a material event. The new FMV typically reflects acquisition pricing pressure, which is materially higher than the prior 409A — meaning new option grants will have a higher strike price.
European founder with US employee: company is German GmbH, employee is US-resident receiving an option grant. The grant must satisfy both German law and US 409A requirements. This requires both an FMV documentation (German requirement) AND a 409A safe harbour valuation (US requirement) — often the same firm can produce both in one engagement.
How CAPLINK Helps You Manage 409A Valuations
CAPLINK's cap table module tracks the current 409A valuation, its expiry date, and the strike price applied to each option grant. When the 12-month expiry approaches, the system flags it so you commission a refresh before the next grant cycle. When a funding round closes, the system flags the material event so you know to commission a new valuation before further grants.
The valuation report itself goes into the [data room](/dataroom) where it is needed for diligence — Series B investors will ask for the full 409A history of the company to confirm option grants were issued at FMV. Having every report indexed and accessible accelerates diligence by days.
For European founders, CAPLINK supports the multiple legal structures (UK EMI, French BSPCE, German VSOP, real share grants) and tracks the country-specific valuation requirements alongside the grants. See [ESOP](/captable/esop) for the broader employee equity program structure, [vesting schedules](/captable/vesting-schedules) for the vesting mechanics on top of the FMV-set strike price, and [pre-money vs. post-money valuation](/captable/pre-money-post-money-valuation) for the preferred share valuation that feeds the common FMV gap.