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This calculator provides tax estimates for educational purposes only. Consult a licensed tax professional before making financial decisions. EquityTax is not a CPA firm and does not provide tax, legal, or financial advice.

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Calculators

ISO AMT Calculator
RSU Tax Calculator
Multi-Year Planner
83(b) Election Guide
IPO Lock-Up Planner

Quick Links

Pricing
Blog
About
FAQ
Login
Get Started
Support

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support@myequitytax.com

Blog | EquityTax

The Equity Tax Guide

Expert insights on equity compensation, tax planning, and strategies to keep more of what you've earned.

All(37)Tax Planning(8)RSU Taxes(5)Stock Options(8)Equity Compensation(12)State Tax(4)

Equity Compensation

83(b) Election Explained: What It Is, How to File, and When It Saves You Thousands

A complete guide to 83(b) elections — what they are, how to file, the 30-day deadline, and when filing saves you tens of thousands in taxes on startup equity.

Mike Navarro·March 9, 2026·12 min read

#83b#Restricted Stock#Early Exercise+2 more

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Run the Numbers for Your Situation

Every equity package is different. Try our free calculators — results in 60 seconds, no signup required.

ISO AMT Calculator

Find your AMT-free exercise limit before it costs you $20K+

RSU Tax Calculator

Uncover hidden withholding shortfalls on your RSU vests

Multi-Year Planner

Optimize ISO exercise timing across 3-5 years

83(b) Election Calculator

Compare tax outcomes of filing vs. not filing an 83(b)

IPO Lock-Up Planner

Plan for taxes and liquidity around your IPO