Model Startup Options & 83(b) Tax Arbitrage
Compare 1x, 3x, 5x, and 10x startup exit payouts with and without an IRS 83(b) election to quantify long-term capital gains savings.
Launch Startup Equity Exit Matrix →1x to 10x Exit Matrix
Stress-test your startup option grant across Downside (0x), Flat (1x), Series C/IPO (3x), Breakout (5x), and Unicorn (10x) outcomes.
83(b) Ordinary vs. LTCG Spread
Quantify the exact federal tax savings of locking in Long-Term Capital Gains within 30 days of early exercise.
Public RSU Volatility Mode
Switch seamlessly to public RSU appreciation scenarios (-20% Bear to +30% Hypergrowth) with stacking refreshers.
Key Questions Answered
When must an 83(b) election be filed?
Within exactly 30 calendar days of your stock grant or early exercise date—there are no extensions.
How much tax can an 83(b) election save?
By shifting future appreciation from ~37% ordinary income rates to ~20% long-term capital gains, early-stage employees can save tens or hundreds of thousands on a 5x–10x exit.