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Operator guideIRC Section 409A requires that private company stock options be granted at or above fair market value. A 409A valuation establishes that FMV. Strike prices set below FMV can trigger 20% additional tax plus interest on options.
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409A Valuation Guide · File.Business

409A valuation. Setting option strike prices.

A 409A valuation is an independent appraisal of common stock fair market value for a private company. Required by IRC Section 409A to set stock option strike prices. Without a current 409A, the IRS may impose major penalties on optionees. Standard cadence: annually, plus after material changes (financing rounds, M&A).

Key facts

Start here.

Key fact
What it is

Independent appraisal of private company common stock FMV.

Key fact
Why required

IRC Section 409A penalizes options granted below FMV.

Key fact
Who provides

Valuation firms (Carta 409A, Aranca, KeyValueData, others). Typically $1,500-$5,000.

Key fact
When done

Annually, plus after material changes: financing rounds, M&A, key personnel changes.

Key fact
Safe harbor

Use of qualified independent appraiser provides safe harbor.

In depth

The full picture.

01

What 409A is and why

IRC Section 409A taxes "deferred compensation" not meeting specific rules. Stock options granted at below-FMV strike are deemed deferred compensation subject to 20% additional federal tax plus interest at the option holder level. 409A valuation establishes FMV; setting strike at or above the 409A FMV avoids the penalty.

02

What gets valued

Common stock fair market value for a private company. The valuation produces a per-share FMV that becomes the floor for stock option strike prices.

03

Who does the valuation

Independent valuation firms. Common providers: Carta 409A (most common for startups), Aranca, KeyValueData, EquityList, and specialized appraisers.

04

Methods

Various approaches per AICPA Practice Aid: market approach (comparable company multiples), income approach (DCF), asset approach (book value or net asset value). For early-stage companies with recent funding, the market approach using the post-money valuation is most common.

05

Cost

$1,500-$5,000 typical. Lower for early-stage companies with minimal valuation complexity. Higher for late-stage with multiple share classes.

06

Frequency

Annually at minimum. Plus after material changes: priced equity rounds, M&A, key product launches, significant revenue changes, material litigation.

07

Safe harbor

Section 409A provides safe harbor for valuations performed by qualified independent appraisers using accepted methods. Strike prices set at or above 409A FMV are deemed compliant.

08

Validity period

12 months from valuation date, or until material change. After material change, new valuation typically required before further option grants.

09

Common mistakes

Letting 409A expire and granting options. Setting strike below 409A FMV. Not getting new valuation after a priced round (the round itself changes FMV).

FAQ

Common questions.

Do I need a 409A valuation?
If you grant stock options as a private company, yes.
When do I need it?
Before granting options, and renewed annually or after material change.
What if I miss it?
Strike prices below FMV trigger 20% additional federal tax plus interest at the option holder level.
How much does it cost?
$1,500-$5,000 typically.
Who does it?
Carta, Aranca, KeyValueData, specialized appraisers.
How long is it valid?
12 months or until material change.
Does this affect founder stock?
Founder stock at par value at incorporation is typically not subject to 409A. Subsequent grants are.
What is a material change?
Priced equity round, M&A, key personnel, significant revenue change, material litigation.

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