Stock Options
Rights to purchase company shares at a fixed price (strike price) within a specified exercise window.
Stock options are contractual rights granted to employees, directors, or consultants to purchase a specified number of company shares at a fixed price (the exercise or strike price) for a defined period. The option has value when the company's current stock price exceeds the strike price (the option is 'in the money'); options are worthless if the stock price never exceeds the strike.
Two primary types exist. Incentive Stock Options (ISOs) are granted only to employees under plans qualifying under IRC Section 422. ISOs offer favorable tax treatment: no ordinary income tax at exercise (though the spread triggers AMT preference income), with long-term capital gains rates on appreciation if held properly (1 year from exercise and 2 years from grant). The total fair market value of ISOs vesting per year cannot exceed $100,000 per employee.
Non-Qualified Stock Options (NQSOs or NSOs) can be granted to employees, directors, and consultants. At exercise, the spread (current FMV minus strike) is taxable as ordinary income (and subject to payroll taxes for employees). Subsequent appreciation is capital gain. NSOs have no qualifying plan requirements or annual limits.
Options typically vest over 4 years with a 1-year cliff (25% vests after 12 months; remainder vests monthly or quarterly over the following 36 months). This structure retains employees for the full vesting period to maximize equity benefits.
For employees at startups, options are often priced at the company's 409A fair market value—the IRS-required independent valuation of common stock (which is lower than preferred stock value, where investors invest). The spread between 409A and eventual exit price is the value creation employees are rewarded for.
FAQs
What is an option exercise price and how is it set?
The exercise price (strike price) is the fixed price at which the option holder can purchase shares. IRS regulations require options to be granted at no less than 100% of the fair market value (FMV) of the underlying shares on the grant date to receive favorable tax treatment (options granted below FMV trigger immediate ordinary income recognition under IRC Section 409A). For private companies, FMV is determined by an independent 409A valuation. For public companies, the exercise price is typically the closing market price on the grant date. The lower the strike price relative to eventual stock value, the more valuable the option.
What is the difference between the option's grant date, vesting date, and exercise date?
Grant date: when the option agreement is signed and the option is officially awarded—the exercise price is set on this date. Vesting date: when a tranche of options becomes exercisable—unvested options cannot be exercised. Employees who leave before vesting typically forfeit unvested options. Exercise date: when the employee actually purchases shares by paying the exercise price—options can be exercised anytime after vesting until expiration. Expiration date: options must be exercised by this deadline (typically 10 years from grant for public companies; 90 days after termination for post-termination exercise windows at many companies—a critical limitation for employees who leave before IPO).
Why do startup employees sometimes face a difficult decision about exercising options?
Startup option exercises are difficult because: cash must be paid equal to the strike price × shares (potentially tens or hundreds of thousands of dollars for large grants); ISOs trigger AMT on the spread even if shares aren't sold (potential tax liability before any liquidity); shares in private companies are illiquid—you can't sell them immediately; the company may fail, making the shares worthless; and post-termination exercise windows (often only 90 days to exercise after leaving) create time pressure during potentially volatile personal situations. Employees must evaluate their conviction in the company's success, ability to fund the exercise and AMT tax, and expected liquidity timeline. Many companies now offer extended 10-year post-termination exercise windows to reduce this pressure.
Related Terms
Restricted Stock Units
Equity awards that vest over time and convert to actual shares upon vesting, taxed as ordinary income at vesting.
Total Compensation
Complete value of all monetary and non-monetary benefits provided to an employee in exchange for their work.
Alternative Minimum Tax
Parallel tax calculation ensuring high-income taxpayers pay a minimum federal tax regardless of deductions.
