Stock options are compensation that can be taxed as ordinary income, capital gains, or both - depending entirely on the type of option (ISO vs. NSO), when it is exercised, and how long the stock is held afterward. The difference between these two paths can be tens of thousands of dollars in tax on the same underlying equity grant. Understanding the rules before exercise is the only way to plan effectively.
Incentive Stock Options (ISO): No ordinary income at grant or exercise (but AMT applies to the bargain element). Tax deferred until sale. If holding requirements are met, all gain taxed at long-term capital gains rates. The best tax outcome of any equity form.
Non-Qualified Stock Options (NSO/NQ): No tax at grant. At exercise, the bargain element (FMV minus exercise price) is ordinary income - W-2 for employees, 1099-NEC for contractors. FICA applies. Post-exercise appreciation is capital gain. No way to avoid ordinary income on exercise.
To receive long-term capital gain treatment on the entire spread, ISO shares must satisfy both: (1) held more than 2 years from the grant date, and (2) held more than 1 year from the exercise date. If both are met, the entire gain from exercise price to sale price is long-term capital gain. No ordinary income anywhere in the chain.
If either holding period is not met - a disqualifying disposition - the bargain element at exercise becomes ordinary income in the year of sale. The remaining appreciation (from exercise FMV to sale price) is capital gain, with the holding period determining long-term vs. short-term.
When an NSO is exercised, the spread (FMV on exercise date minus exercise price) is compensation income under IRC §83. For employees, it appears on the W-2. For consultants, on 1099-NEC. FICA taxes (Social Security and Medicare) apply to employee NSO spreads. The employee's basis in the stock is the FMV on the exercise date, so subsequent appreciation to sale is capital gain, with the holding period starting on the exercise date.
There is no planning available to avoid the ordinary income at NSO exercise - the character is fixed by statute. The only variable is timing: exercising when the spread is small (early after grant, before significant appreciation) minimizes the ordinary income component.
ISOs that become exercisable for the first time in a calendar year cannot exceed $100,000 in value (based on grant-date FMV) under IRC §422(d). Options in excess of $100,000 that vest in a given year are automatically treated as NSOs regardless of how they are labeled in the grant agreement. This is a mechanical rule that applies even if the company and employee intended ISO treatment for the full grant.