Equity Compensation · ISO vs NSO · 2026
Employee Stock Options: ISO vs NSO Tax Treatment (2026)
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Employee stock options can create tax at exercise, sale, or both. The rules differ sharply between incentive stock options (ISOs) and nonqualified stock options (NSOs), so timing matters.
ISO vs. NSO: Key Differences
NSOs: the spread between exercise price and fair market value is generally ordinary compensation income at exercise. A later sale can create capital gain or loss.
ISOs: exercise generally does not create regular-tax ordinary income, but the spread can affect the alternative minimum tax (AMT). A qualifying sale may receive capital-gains treatment if the holding requirements are met.
Restricted Stock and 83(b) Elections
An 83(b) election applies to certain restricted stock, not to every equity award. It can shift income recognition earlier, often before appreciation, but the election has a strict deadline and can backfire if the shares are forfeited. Consult a tax professional before making one.
Planning Strategies
Before exercising options, review the award type, vesting schedule, fair market value, exercise cost, holding period, AMT exposure, and sale plan. Equity-compensation decisions can affect both payroll withholding and your tax return.
Model withholding for restricted stock unit vesting.
Use the RSU tax calculator →Frequently Asked Questions
Are stock options taxed as income?
NSOs are generally taxed as ordinary income when exercised. ISOs may qualify for capital-gains treatment if holding requirements are met.
When do I owe tax on stock options?
NSOs generally create ordinary income at exercise. ISOs can create an alternative minimum tax adjustment at exercise and capital-gains tax when sold.
What is the 83(b) election?
An 83(b) election may let a person receiving restricted stock choose to recognize income earlier, potentially before appreciation. It has strict timing and risk tradeoffs; consult a tax professional.
Figures and methods are based on official-source data encoded in the calculator. Not tax advice. Review the methodology and consult a qualified professional for your situation.