Our free 409A valuation calculator gives you a quick estimate of your common share value. Just answer a few questions. No signup needed.
This calculator is helpful for early planning and rough estimates. But when you’re issuing stock options or updating your 409A, a professional valuation is essential. Eton Venture Services delivers audit-ready 409A valuations at affordable rates. Reach out to our team here.
Our calculator uses two widely accepted methods to estimate the fair market value of your common shares:
Your company’s value, share structure, funding history, and stage all shape the result. That’s why we ask for those details. They help us apply the right method and logic behind the scenes.
But remember: A professional 409A valuation goes beyond formulas. It weighs multiple scenarios, applies nuanced judgment, and includes the documentation needed to support IRS safe harbor status. The result is a valuation you can trust to protect your team and your equity plan.
If you’re setting option prices or preparing for a board review, reach out to our team for expert support.
It's more than just math and plugging in numbers.
A professional 409A looks at your cap table, exit plans, and funding to give you a result that reflects your real situation, not just a rough estimate.
If you're granting stock options, a proper valuation supports IRS safe harbor, keeps you compliant, and shows your board you're doing things right.
Safe harbor means your employees won’t face surprise taxes. A professional valuation makes sure your option grants are fair and protected.
At Eton Venture Services, we’ve been delivering high-quality, defensible 409A valuations since 2010. We’re a boutique firm with Big Four expertise. So you get the same expert analysis, but with more personal attention, faster turnaround, and affordable pricing for growing businesses. And our clients appreciate it:
Eton works with many Attivo Partners clients and we are confident introducing Eton to our clients for their valuation needs. Eton is easy to work with, process oriented and reasonably priced. Eton listens to what our client needs, understands their business model, and provides a level and ease of communication that is rare among valuation firms. Eton’s old-school approach to customer service is refreshing! 
The team at Eton is fantastic! Those guys cut their teeth as securities lawyers at premier firms in Silicon Valley so no matter how complex a situation we have presented to them, they are quick on the uptake, and they quickly produce great work. Plus, I can talk to the founder of the firm by simply picking up the phone. Eton truly exceeds our expectations! 
As a firm, Kruze Consulting is extremely confident in introducing Eton to our clients for valuation work. Eton is super responsive, reasonably priced, and they take customer service to impressive levels. Eton is a great partner for us and the companies we work with! 
Working with Eton has been a fantastic experience, and they have been a great partner of ours. The team provides us with well-priced services, delivers quickly and is very responsive to our requests and questions, whether those communications are from our board of directors, our outside counsel, or from our financial statement auditors. 
Our 409A valuation calculator is a useful starting point. It uses simplified versions of OPM and PWERM to calculate what common shares might be worth in scenarios like a sale, IPO, or new funding round.
But for stock option grants or IRS compliance, you’ll need a professional 409A valuation. That’s what gives you safe harbor protection and audit-ready documentation. If that’s what you need, reach out to our team here.
You can first use our free startup valuation calculator to estimate your total company value, then return here to run your 409A estimate.
If you need a professional valuation, Eton Venture Services can provide both full business valuations and 409A valuations that are accurate and IRS-compliant.
Yes. It’s built to give startups across industries (SaaS, fintech, healthtech, and more) a helpful starting point using simplified logic.
In a professional 409A valuation, though, we tailor the analysis more closely to your industry by selecting relevant comparable companies and applying assumptions that reflect how similar businesses perform. This supports a valuation that reflects market context and meets IRS safe harbor standards. If this is what you’re looking for, contact our team for expert support.
You’ll need a 409A valuation if you plan to give stock options to employees. It sets the fair market value of your common shares, which helps you price those options correctly and stay compliant with tax rules.
You’ll also need a new valuation if something big happens (so-called ‘material events’) like raising a new round, merging with another company, or changing your business model.
If nothing major happens, you should update your 409A at least once every 12 months.
We discuss this in more detail in our article on 409A Valuation Requirements.
Absolutely. At Eton Venture Services, we’ve delivered high-quality, audit-ready 409A valuations since 2010.
We’re a boutique firm with Big Four expertise, so you get the same top-tier insight with faster turnaround, more affordable pricing, and a hands-on team. We’ll help you meet IRS safe harbor standards and support your board reviews with full documentation. Contact us today.
