Stock Option Plan

A stock option plan is the legal scaffold that holds equity compensation together. Without it, the company has no authority to grant options, employees have no contractual rights to them, and the tax treatment is murky. It’s the document almost no one reads but everyone relies on.

The plan vs. the individual grant

A stock option plan is a template. It says: “Employees may be granted options; vesting is four-year schedule with one-year cliff; post-termination window is 90 days; ISOs for employees, NSOs for consultants.” It’s adopted by the board and filed with the state (for Delaware corporations). It’s public information.

An individual option grant is a specific instantiation of that template. When you’re hired, HR issues you a grant letter saying: “You are granted 10,000 options at $50 per share, vesting over four years starting [date].” The grant is bound by the plan’s rules but customized to your terms.

The plan is the constitutional document. The grant is the decree under that constitution.

What a plan authorizes

Every plan specifies the total number of shares that can be granted—the “share pool.” A company might authorize a 10,000,000-share pool, meaning the board can grant up to 10M shares of options and restricted units (RSUs) combined. Once the pool is exhausted, no new grants can be made without amending the plan.

Startup plans often have large pools (to accommodate future hires without amendment) and can be dilutive at IPO if not carefully managed. Companies sometimes “refresh” the pool (amend to increase it) every few years.

The plan also sets per-employee limits. A typical rule: no single employee can be granted more than 2% of the total share pool in any year. This prevents founders from hoarding all the equity.

Tax treatment in the plan

Plans must declare upfront whether options granted under them are ISOs (incentive stock options) or non-qualified. This affects everything: the vesting window, exercise price rules, tax withholding, and participant eligibility.

For ISOs: The plan must state that only employees can receive ISOs (not contractors or directors). The exercise price must be 100% of fair market value at grant (no discount). Post-termination exercise window must be stated, and ISOs exercised beyond three months after termination are automatically disqualified.

For NSOs (non-qualified options): More flexible. Contractors, directors, advisors can all receive them. The plan can allow discounted exercise prices (though tax consequences are harsher). The post-termination window can be longer.

Many plans authorize both ISOs and NSOs, letting the board choose the type for each grant based on the recipient and goals.

The plan document itself

A typical stock option plan is 15–30 pages and covers:

• Definitions: What constitutes a “change of control,” “termination,” “disability,” “approved leave,” etc.
• Eligibility: Who can receive options (employees only? employees + directors + consultants?).
• Grant terms: Vesting schedule, exercise price rules, expiration dates.
• Exercise mechanics: How options are exercised; broker procedures; tax withholding.
• Post-termination rules: What happens to vested vs. unvested options after departure.
• Plan amendments: How the board can change the plan (with shareholder approval if required).
• Clawback provisions: Whether the board can reclaim options in case of misconduct or financial restatement.

Plan adoption and amendments

A new plan is adopted by the board and approved by shareholders (for public companies; sometimes for private too). Once adopted, the plan binds the company and participants.

Amendments require board approval and usually shareholder approval (especially for increases to the share pool, changes to eligibility, or changes to the definition of a change of control). Companies amend plans frequently—refreshing the pool, adding tax provisions, or adjusting vesting schedules.

Evergreen provisions: Some plans include an “evergreen” clause that automatically increases the share pool each year by a fixed percentage (e.g., 5% of outstanding shares) or fixed number (e.g., 1M shares). This lets the company make grants without shareholder approval each time, simplifying administration. Shareholders usually approve the evergreen formula upfront.

Plan termination

If a company is acquired, the acquirer often assumes the old plan or rolls all options into a new plan. If the company shuts down, the plan terminates—all unexercised options are forfeited unless there’s an acceleration clause. Public companies must disclose plan termination in filings.

Common disputes: what the plan says vs. what you were told

The written plan is binding. If your grant letter says “vesting is one-year cliff on a four-year schedule” but the plan says “straight-line vesting over four years,” the plan controls. If you were verbally promised accelerated vesting in a merger but the plan says “double-trigger, 25% acceleration only,” the plan controls.

This is why reading your option grant letter and the plan (if available) is important. Many companies provide a plan summary with the grant letter, but not the full document. Asking for the full plan is reasonable and should not raise red flags.