Stock Options Tax Calculator
Compare tax implications of ISO vs NSO stock options. Calculate AMT exposure, capital gains, and optimal exercise strategies.
ISO vs NSO Comparison
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Total Exercise Cost
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Spread Value
ISO (Incentive Stock Options)
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Tax on Exercise
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AMT Exposure
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Net Profit
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Effective Rate
NSO (Non-Qualified Stock Options)
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Income Tax
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FICA Taxes
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Net Profit
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Effective Rate
Summary
Frequently Asked Questions
What is the difference between ISO and NSO stock options?▾
ISOs (Incentive Stock Options) receive favorable tax treatment with no ordinary income tax at exercise, but may trigger AMT. NSOs (Non-Qualified Stock Options) are taxed as ordinary income on the spread at exercise.
What is AMT and how does it affect ISOs?▾
The Alternative Minimum Tax (AMT) is a parallel tax system. The spread on ISO exercises (fair market value minus exercise price) is added to AMT income, potentially triggering additional tax.
When should I exercise my stock options?▾
Timing depends on your tax situation, stock price outlook, and cash flow. This calculator helps you compare the tax impact of exercising now vs later and ISO vs NSO treatment.
Is my financial data safe?▾
Yes. All calculations happen entirely in your browser. No data is ever sent to a server.