Full Definition
Stock options grant the holder the right—but not the obligation—to purchase company shares at a specified price (the exercise or strike price) during a defined exercise window (typically 10 years from grant date for ISOs, sometimes shorter for NSOs). Options are "in the money" when the current stock price exceeds the exercise price, creating economic value equal to the difference. Options that are "out of the money" (current price below exercise price) have no immediate economic value and may expire worthless if the stock price never exceeds the exercise price during the exercise window. This asymmetric payoff structure—unlimited upside if the stock rises, zero downside beyond forgone cash compensation—makes options a high-risk, high-reward compensation instrument aligned with shareholder interests. Two types of stock options have significantly different tax treatment. Incentive Stock Options (ISOs) are available only to employees (not contractors), have favorable personal income tax treatment if statutory holding periods are met (gains taxed at long-term capital gains rates rather than ordinary income), and carry AMT (alternative minimum tax) risk at exercise. Non-Qualified Stock Options (NSOs or NQSOs) are available to employees, directors, and contractors; gains at exercise are taxed as ordinary income (plus payroll taxes for employees) with no special tax treatment. From the company's perspective, NSO exercises generate a tax deduction equal to the employee's ordinary income; ISO exercises (when held long enough for favorable treatment) generate no company deduction. The tax analysis is situation-specific and employees should consult tax advisors before exercising options. Early exercise provisions (Section 83(b) elections) allow employees to purchase unvested options at grant date value, paying tax now on the current spread (typically zero if options are granted at FMV) and beginning the long-term capital gains clock immediately. This strategy can be highly advantageous for early startup employees who receive grants at low valuations before significant appreciation—but requires cash to exercise and understanding of the risk that the shares may never reach an exit value that justifies the investment.
FAQs
What happens to unvested options when an employee is terminated?
Standard option agreements specify that unvested options are forfeited upon termination (for any reason). Vested options typically have a post-termination exercise window—90 days for most ISOs (after which they convert to NSOs), and variable periods (90 days to 10 years) for NSOs depending on company policy. Employees with significant vested option value who are terminated must decide quickly whether to exercise before the window closes, requiring cash for the exercise price and tax planning for the income recognition.
When are RSUs preferable to stock options for employee compensation?
RSUs are preferable when: the company's stock price is high relative to early grants (options deeply in the money provide RSU-like economics with exercise price complexity), when employees need compensation certainty (RSUs deliver value even if stock declines from grant date), when the company is later-stage with more predictable valuation trajectory (the asymmetric upside of options is most valuable when substantial value creation is still ahead), and when administrative simplicity is a priority (RSUs are simpler to understand and administer than options with their varying exercise prices and expiration dates).
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