Stock Option Calculator
Model your equity value across exit scenarios
Your Option Details
$
50%
Company Details
$
$
Dilution & Preferences
20%
$
Tax Settings
32%
9%
Your Ownership
0.05%
Potential Value (at $100M)
$35,000
After dilution & preferences
Exercise Cost
$5,000
To buy vested shares
Breakeven Exit Valuation
$12.5M
Company must exit above this for your options to have value
Option Value by Exit Scenario
Exit Scenario Details
| Exit Valuation | Price/Share | Gross Value | After Preferences | Your Take (Pre-Tax) | Your Take (Post-Tax) |
|---|
ISO vs NSO Tax Comparison (at $100M Exit)
Incentive Stock Options (ISO)
Gross Proceeds
$45,000
Exercise Cost
-$5,000
Federal LTCG Tax
-$6,000
State Tax
-$3,600
AMT (if applicable)
$0
Net Proceeds
$30,400
Non-Qualified Stock Options (NSO)
Gross Proceeds
$45,000
Exercise Cost
-$5,000
Federal Income Tax
-$12,800
State Tax
-$3,600
FICA (up to limit)
-$1,530
Net Proceeds
$22,070
ISO Qualification Requirements
To receive favorable LTCG treatment on ISOs, you must hold shares for at least 1 year after exercise AND 2 years after grant date.
Exercising ISOs may trigger Alternative Minimum Tax (AMT) based on the spread between strike price and FMV at exercise.
Model Assumptions
Important Disclaimer
This calculator provides estimates only and should not be relied upon for tax, legal, or investment decisions.
Actual outcomes depend on many factors including deal structure, cap table mechanics, tax law changes, and negotiations.
Consult a qualified tax advisor and attorney for advice specific to your situation.