83(b) Election Tax Savings Calculator
Model tax liability on startup restricted stock. Compare paying tax upfront at grant versus vesting, track the 30-day deadline, and project exit capital gains.
83(b) Election Tax Savings & Deadline Calculator
Compare ordinary income tax at grant vs vesting. Model long-term capital gains savings and IRS 30-day deadlines.
Federal & state tax saved by locking in capital gains treatment upfront.
Why the 83(b) Election is Essential for Startup Equity
When startup founders or early employees receive equity subject to vesting (typically a 4-year schedule with a 1-year cliff), IRS Section 83(a) dictates that every time a tranche of shares vests, the recipient incurs ordinary income tax on the difference between the fair market value (FMV) on that vesting date and the initial purchase price.
If your startup grows rapidly and increases in valuation from $0.05/share to $10.00/share, you could face massive dry tax bills on illiquid shares you cannot even sell. By timely filing an 83(b) election, you freeze the tax valuation at Day 1, pay nominal tax upfront, and treat 100% of future appreciation as lower-taxed long-term capital gains.
Key Features
Statutory 30-Day Deadline Counter
Accurately computes your exact IRS filing deadline from equity grant date to prevent irreversible missed elections.
Dual Tax Path Comparison
Models upfront tax liability at grant date vs crushing ordinary income tax liabilities as equity vests at higher valuations.
Capital Gains Holding Period Acceleration
Calculates the tax benefit of starting the one-year long-term capital gains clock on Day 1 rather than on vesting date.
Downside Risk Modeling
Displays upfront capital at risk if the company becomes insolvent before shares can be liquidated.
Common Use Cases
- ✓Startup Founders & Co-Founders
File 83(b) elections immediately upon incorporating and issuing common stock to pay pennies today rather than millions at exit.
- ✓Early-Stage Tech Hires
Evaluate early-exercise of unvested ISO/NSO stock option grants to minimize future Alternative Minimum Tax (AMT) and ordinary income.
- ✓Angel Investors & Advisors
Structure restricted stock advisory agreements for maximum tax deferral.
Frequently Asked Questions
What is an IRS Section 83(b) election?
An 83(b) election is a provision under the US Internal Revenue Code that allows an employee or founder receiving restricted stock to pay ordinary income taxes on the fair market value of the shares at the time of grant, rather than as the shares vest over time.
What is the strict deadline to file an 83(b) election?
You must file your written 83(b) election letter with the IRS within exactly 30 calendar days of receiving or acquiring the restricted property. There are NO exceptions or extensions granted by the IRS, even for postmarked delays.
What are the risks of filing an 83(b) election?
The primary risk is that if you pay tax upfront and later leave the company before shares vest, or if the startup goes bankrupt, you cannot claim a tax refund or deduction for the tax already paid on unvested shares.
Do I file an 83(b) with my annual tax return or immediately?
You must mail the physical letter via USPS Certified Mail (with Return Receipt Requested) directly to the IRS Internal Revenue Service Center within 30 days of the grant date, and attach a copy to your annual Form 1040 return.
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