409a Valuation Calculator

Background.

This 409a valuation page is built to derive a simplified common-share value after debt and preferred claims and apply an entered marketability discount. Section 409A requires a reasonable fair-market-value process for nonqualified deferred compensation strike prices; a qualified independent appraisal can provide a safe harbor. The implemented convention is “simplified common value = max(enterprise value + cash - debt - preferred claims, 0) / common shares x (1 - entered marketability discount).”

The editable entries are enterprise-value indication from selected valuation work, cash added to enterprise value, debt deducted from enterprise value, preferred claims ahead of common in this simplified allocation, fully diluted common shares, entered discount for lack of marketability. Use values from the document or measurement that governs this 409a valuation question; the defaults are only the worked fixture below. Real valuations allocate enterprise value across security classes and use comparables or cash flow, so this arithmetic is not an appraisal. If that 409a valuation condition is not true, choose a calculation that models the missing convention.

IRS final regulations under section 409A, Internal Revenue Bulletin 2007-19 documents the convention or governing rule used here. The 409a valuation output is a transparent scenario under those facts: it does not manufacture an unentered market price, professional determination, carrier quote, legal eligibility finding or locally adopted code value.

What is 409a valuation calculator?

409a Valuation is the relationship behind this decision: section 409A requires a reasonable fair-market-value process for nonqualified deferred compensation strike prices; a qualified independent appraisal can provide a safe harbor. On this page it means simplified common value = max(enterprise value + cash - debt - preferred claims, 0) / common shares x (1 - entered marketability discount). Real valuations allocate enterprise value across security classes and use comparables or cash flow, so this arithmetic is not an appraisal; that is the line between the reported quantity and a broader corporate finance analysis.

How to use this calculator.

1. 01Confirm that “simplified common value = max(enterprise value + cash - debt - preferred claims, 0) / common shares x (1 - entered marketability discount)” matches the 409a valuation convention you need.
2. 02Replace the fixture values for enterprise-value indication from selected valuation work, cash added to enterprise value, debt deducted from enterprise value, preferred claims ahead of common in this simplified allocation, fully diluted common shares, entered discount for lack of marketability with dated values from the governing record.
3. 03Keep all currencies, measurement units and time periods on the same basis before calculating.
4. 04Read simplified indicated common-share value together with this boundary: Real valuations allocate enterprise value across security classes and use comparables or cash flow, so this arithmetic is not an appraisal.

The formula.

The calculation uses simplified common value = max(enterprise value + cash - debt - preferred claims, 0) / common shares x (1 - entered marketability discount). In this 409a valuation model, the entered terms are enterprise-value indication from selected valuation work, cash added to enterprise value, debt deducted from enterprise value, preferred claims ahead of common in this simplified allocation, fully diluted common shares, entered discount for lack of marketability. Section 409A requires a reasonable fair-market-value process for nonqualified deferred compensation strike prices; a qualified independent appraisal can provide a safe harbor, which is why the relationship is presented under this name rather than as a universal alternative. Real valuations allocate enterprise value across security classes and use comparables or cash flow, so this arithmetic is not an appraisal. Calculations keep full decimal precision through the relationship and round only the returned display values.

A worked example.

Frequently asked questions.

References& sources.

1. [1]IRS final regulations under section 409A, Internal Revenue Bulletin 2007-19. Retrieved 2026-08-07. access: open unless marked otherwise.
2. [2]U.S. Internal Revenue Service. Topic no. 427, Stock options. Retrieved 2026-08-07. independence: primary; access: open.
3. [3]U.S. Securities and Exchange Commission. Investor.gov glossary: Stock option. Retrieved 2026-08-07. independence: primary; access: open.