409A Valuation Services

Whether you’re just setting up your first option plan or managing complex capital structures, Eton delivers 409A valuation services tailored to your stage of growth.

409a valuation services

Trusted by 1,000s of Companies

Audit-Ready 409A Valuation Services

A 409A valuation sets the fair market value (FMV) strike price of your common stock.

Under IRC 409A, all companies that offer stock options to employees and stakeholders have a legal requirement to get a 409A valuation annually, or upon experiencing a material event.

Eton ranks among the best 409A valuation firms, trusted by thousands of clients to deliver audit-ready valuations, including well-known companies like Perplexity, Substack, and Pinterest.

We’re a boutique team of Stanford Law lawyers and Ex-Big 4 Consultants that provide accurate, compliant 409A reports with the level of customer support founders expect but rarely get from larger 409A providers.

Our 409A Valuation Packages

Early-Stage (Seed–Series A)

For early stage startups, we provide audit-defensible 409A valuations founders can trust at affordable rates.

  • 1-day turnaround available
    Get it done fast so you can get back to building
  • Big 4 & Silicon Valley expertise
    At less than one-third the price
  • Signed, qualified appraisal
    IRS-compliant, safe-harbor protected
  • Audit-defensible reports
    Professional logic, documentation & comparables
  • Founder-first support
    Calls to walk you through every detail, no surprises later
  • Fair strike prices
    Prevent overpricing options and keep employees motivated

Late-Stage (Series B and beyond)

For late stage startups, we provide professional rigor, a hands on partnership, and a full suite of valuation services your finance team can lean on.

  • 1-day turnaround available
    Get it done fast so you can get back to building
  • Big 4 & Silicon Valley expertise
    At less than one-third the price
  • Signed, qualified appraisal
    IRS-compliant, safe-harbor protected
  • Audit-defensible reports
    Professional logic, documentation & comparables
  • Expertise beyond 409A
    Full M&A services across ASC 718, PPA, and more
  • True human partnership
    Investor-grade rigor, in-depth discussions and guidance, not just a PDF in your inbox

409A Valuations in less than 10 days

Day 1
Day 2
Day 8
Day 10
Forever
Information Collection
Valuation Modeling and Analysis
Draft Report Delivered; Client Review and Approval
Final Report Delivered
Audit Support

For urgent timelines, we offer a 1-day turnaround option. Contact us here to learn more.

Why Early-Stage Startups Choose Eton for 409A Valuation Services

Defensible Reports

Our reports are signed, independent, and fully IRS-compliant. This ensures safe harbor protection and gives you peace of mind knowing your valuation won’t get dismissed in an audit.

Founder-First Support

We don’t just send a PDF. We walk you through the findings and answer every question so you understand the outcome and are ready to present it with clarity to your board or investors.

Speed Without Compromise

Early-stage founders have bigger things to focus on. To help you keep momentum without roadblocks, we move quickly without sacrificing accuracy or reliability.

Why Late-Stage Startups Choose Eton for 409A Valuation Services

Built for Complex Valuations

We bring a proven track record in handling intricate capital structures, providing valuations that leadership can rely on in every high-stakes setting.

Human Expertise, Not Automation

Our valuations are prepared by professionals with legal, accounting, and Big 4 backgrounds, delivering realistic results that align with both regulatory expectations and business needs.

Continuity as You Scale

Beyond 409A, we support ASC 718, purchase price allocations, and gifting valuations for estate planning with the same rigor, giving you one trusted partner at every stage.

"As a former Gunderson lawyer, I co-founded Eton to bring the precision, efficiency, and the obsessive client service of corporate securities law to business valuation. I'm especially proud that our worldwide team of Big 4 trained CFAs has adopted that client service mantra wholeheartedly.

Our entire focus is on delivering audit-defensible, rigorous, and timely valuations without the inefficient back-and-forth of other firms. Client service is our religion. We always go the extra mile to overdeliver for every client."

Chris Walton, JD
President & CEO
Eton Venture Services
Previously at Gunderson Dettmer / Stanford Law

Testimonials

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409A Valuation Services | FAQs

How long do your 409A valuation services take?

Most 409A valuations at Eton are completed in ten days.

Our process includes information collection, methodology selection, full valuation modeling, a draft report by day seven, and final sign-off by day ten.

If you’re on a tight deadline we also offer a one-day expedited option at a small premium.

Your time investment is minimal after submitting documents; our team handles the analysis from there.

Eton offers two tailored 409A valuation packages:

  • Early-Stage Startup Package: For seed to Series A companies with simpler structures.
  • Late-Stage Startup Package: For Series B or later companies with multiple rounds and more complex cap tables.

Both packages are priced fairly for the level of rigor, documentation, and support included. For an exact quote, you can contact us and we’ll walk you through what applies to your company.

Eton ranks among the top 409A valuation firms because we deliver Big 4-level technical rigor with the speed, affordability, and customer support founders need, thanks to our boutique structure.

Our analysts come from Big 4 valuation practices and leading law schools, which means every report reflects deep expertise, not automated shortcuts.

Every valuation is:

  • fully USPAP-compliant and designed to meet IRS safe-harbor standards
  • performed by senior human analysts, never handed off to juniors or automated models
  • built using accepted Market, Income, or Asset approaches, applied only when the underlying support justifies them
  • documented thoroughly, with clear assumptions, defensible methodologies, and audit-ready reporting

We tailor each valuation to your company’s stage, walk you through the reasoning behind every assumption, and support you through draft review and sign-off.

This level of diligence is why startups like Perplexity, Substack, and Pinterest trust Eton for accurate, defensible valuations that consistently pass auditor and IRS scrutiny. 

Many 409A valuation companies lean heavily on automation to cut costs, which often leads to inaccurate reports that don’t meet IRS standards, or deliver high-cost, slow-turnaround reports to ensure quality.

Eton takes a different approach:

  • Big 4 experience with boutique-level pricing and timelines
  • Ten-day delivery with a one-day expedited option
  • 100% human analysis, no templates or automated models
  • Strong documentation that meets safe-harbor criteria
  • Hands-on guidance during valuation date selection, methodology choice, and draft review

You get a valuation that’s fast, accurate, and defensible, without the trade-offs founders often face with lower-cost automated 409A providers or larger firms with higher fees and long turnaround times.

Reputable 409A providers ensure compliance by delivering valuations that meet IRS safe-harbor standards. This includes:

  • preparing a full written valuation report (verbal estimates don’t qualify)
  • using independent, qualified appraisers
  • applying accepted USPAP-compliant methodologies
  • documenting all financial data, assumptions, and methods
  • updating the valuation every 12 months or after any material event

A safe-harbor-compliant report is presumed valid unless the IRS proves it “grossly unreasonable,” which significantly reduces risk for both the company and its employees.

At Eton, every valuation we deliver qualifies for safe-harbor protection and has passed auditor and IRS review.

If your report fails to comply with IRS regulations, for example, if it hasn’t been completed by a qualified appraiser with reasonable methodology or relies too heavily on automation common with many cap table platform valuation services, your company risks losing safe harbor protection and faces serious consequences:

  • Immediate taxation: Employees are taxed on the value of their vested stock options, even if they haven’t exercised them.
  • 20% federal penalty tax, plus premium interest (retroactive charges applied at the IRS underpayment rate +1%).
  • Possible state-level penalties, such as California’s additional 5%.
  • Employee morale issues, as unexpected tax bills damage trust and retention.
  • Financing and M&A risks, since non-compliant valuations are red flags in due diligence.

If you are a client of ours and in the rare case that your 409A valuation faces a challenge, we’ll be with you every step of the way and ready to defend our report in court.

Early-stage startups need their first 409A valuation before issuing stock options. After that, valuations must be updated every 12 months or sooner if a material event occurs.

For early-stage companies, material events typically include:

  • your first priced financing round (Seed or Series A)
  • a major shift in the business model
  • significant market changes
  • signing a term sheet

If any of these occur, you’ll need a new valuation before granting further options. The 12-month cycle resets from the date of the updated report.

Featured 409a Valuation Insights

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