About
About
Equity Tax Lab builds source-linked federal stock compensation tax calculators and guides for U.S. taxpayers.
Editorial scope
Equity Tax Lab focuses on federal tax mechanics for RSUs, ISOs, NSOs, ESPP, capital gains, and 83(b) elections.
Content is informational only and is not personalized tax, legal, or investment advice.
Who is responsible
Public content is maintained by the Equity Tax Lab operator. Equity Tax Lab is not a CPA firm, law firm, payroll provider, investment adviser, or tax preparation service.
The site is built around source-linked calculators, visible assumptions, exclusions, and official references so readers can verify the basis for each estimate.
Review status
Pages marked source-checked have been compared against listed IRS, Treasury, SEC, or state agency materials. This is an editorial source check, not professional tax review.
Pages are marked expert-reviewed only after a qualified external tax, legal, payroll, or financial professional reviews the page for accuracy and clarity.
How to use this site
Use Equity Tax Lab to understand the inputs, formulas, exclusions, and official source families behind a stock compensation tax estimate. Use a qualified professional for filing decisions, state tax, high-value transactions, AMT planning, 83(b) elections, or facts that depend on your personal return.
Corrections
See the Editorial Policy for sourcing, review, correction, and monetization rules. Potential corrections can be sent through the contact page.