Employee Stock Options (ISO/NSO) Valuation Calculator
Model vested options, exercise cost, spread and hypothetical exit value for ISO or NSO scenarios with user-entered tax assumptions.
✓ No signup✓ Mobile friendly✓ Clear limitations✓ Browser-first where practical
Recent tools are remembered only on this device.
Planning estimate only. This is a simplified option-value scenario, not tax advice or a 409A valuation. ISO alternative minimum tax, holding periods, state tax, early exercise, exercise timing and company-specific plan terms are not modeled.
Vested options15,000
Exercise cost$30,000
Current spread$90,000
Hypothetical exit intrinsic value$195,000
Modeled exercise tax$0Regular exercise tax shown as $0; AMT not modeled.
Modeled after-tax option value$174,000
Why use this employee stock options (iso/nso) valuation calculator?
Use this free employee stock options (iso/nso) valuation calculator directly in your browser. There is no account to create and the result appears immediately.
How to use it
Start with the inputs shown above, review the assumptions or options, then generate the result. Where the tool creates a file, keep the original until you have opened and checked the downloaded output.
Frequently asked questions
Is Employee Stock Options (ISO/NSO) Valuation Calculator free?
Yes. The core tool is free to use without creating an account.
Do I need an account to use Employee Stock Options (ISO/NSO) Valuation Calculator?
No. You can use the core Toolbox workflow without signing up.
Does Employee Stock Options (ISO/NSO) Valuation Calculator work on mobile?
Yes. Toolbox is designed for modern mobile and desktop browsers, although complex file workflows can be easier on a larger screen.