Option Expiration

An option expiration date is a hard deadline. Miss it by a day and your options are gone forever, regardless of how much the stock is worth. Most options expire 10 years after grant; some earlier. Plan accordingly or lose years of compensation.

The 10-year standard

Most employee stock options have a 10-year term. You’re granted options on January 1, 2024; they expire on January 1, 2034. Anytime in between, as long as shares have vested, you can exercise.

The 10-year term is federal tax law for ISOs. Section 422 of the tax code limits ISOs to 10 years. Non-qualified options have no legal limit, but 10 years is industry standard by convention.

Why 10 years? It’s long enough for most companies to mature or exit (median venture-backed startup runway is 4–7 years to acquisition or pivot). It’s short enough to motivate exercise before the company changes hands through acquisition or liquidation. It’s also easier to administer than perpetual options.

Expiration before departure

If you’re still employed when your options expire, you have until the expiration date to exercise. Most employees don’t think about expiration—if the company hasn’t exited by year 10, the business probably isn’t valuable anyway, and underwater options are abandoned.

But occasionally an employee strategically exercises shortly before expiration. If your company is private and mature but not yet exiting, and you have in-the-money options expiring in six months, exercising now (vs. waiting) locks in ownership before expiration.

Expiration after departure: the 90-day cliff

This is where expiration gets brutal. When you leave, your post-termination exercise window typically closes in 90 days. This doesn’t mean your options expire in 90 days—your legal right to exercise under the option plan expires after 90 days. But the underlying option itself expires on its original date (often 5–7 years out).

Scenario: You’re granted options on January 1, 2024 with a 10-year term (expiring January 1, 2034). You leave the company on January 1, 2027. You have 90 days from departure to exercise your vested options. If you don’t exercise by April 1, 2027, you permanently lose the right to exercise, even though the options technically don’t expire until January 1, 2034.

This 90-day window is the real expiration date for most departing employees. The 10-year term becomes irrelevant.

Extended windows in negotiation

Employees sometimes negotiate longer post-termination windows as part of the hire or promotion. Instead of 90 days, you get 6 months or a year to exercise after departure. This is attractive because:

1. You have more time to raise capital or plan the exercise.
2. You’re less vulnerable to unexpected job loss forcing an immediate exercise decision.
3. For ISOs, a longer window means you’re not forced into disqualification.

Extended windows are more common at:

• Late-stage private companies (where post-termination liquidity is hard to plan).
• C-level executives and founders (who have leverage to negotiate).
• Friendly departures (e.g., you’re leaving to start a company and the board wants to retain goodwill).

Public companies almost never extend the window. 90 days is standardized.

The expiration gotcha: ISOs and the disqualification cliff

ISOs have an additional expiration-adjacent rule: if you don’t exercise your ISO within 90 days of departure, it’s automatically disqualified and becomes a non-qualified option. This is actually a conversion, not an expiration, but it matters tremendously for tax purposes.

Your ISO’s advantage is that the spread between exercise and sale can potentially be taxed as long-term capital gain (15–20% federal). Your NSO’s disadvantage is that the spread is always ordinary income (up to 37%). Disqualification due to late exercise costs you 15–20 percentage points of tax rate.

An employee who exits a company with in-the-money ISOs needs to plan carefully:

• If exercising in 90 days, exercise before disqualification.
• If you can’t afford to exercise, the ISO is worthless (and becomes NSO if you ever do exercise later).
• Some plans allow “extension agreements”—the company agrees to extend the post-termination window beyond 90 days, delaying disqualification.

Expiration and underwater options

If your options are underwater (stock price below exercise price), expiration doesn’t matter. You won’t exercise, so the expiration date is irrelevant. Your option just dies quietly, worthless.

But occasionally an underwater option recovers before expiration. A startup that’s foundering can recover with new funding or pivoting. If your $50-strike options expire in six months and the stock rises from $20 to $55, suddenly you have six months to get $50,000 together to exercise before expiration.

Private companies and uncertain expiration

For private companies, the expiration date is set in your grant letter, but it’s often moot. The company either exits (through acquisition or IPO) or fails before expiration. You rarely get a situation where a private company remains solvent and private past the 10-year expiration date.

When a private company approaches its 10-year anniversary and is still unfunded and unsold, employees usually assume their options are worthless and stop thinking about expiration.

Expiration and tax planning

If you’re strategically managing your equity tax situation, expiration matters. If you have:

• Underwater options expiring in a year: Let them expire (no tax consequence).
• In-the-money options expiring in a year: Exercise before expiration to lock in value.
• ISOs expiring in 90 days post-departure: Exercise ASAP to preserve ISO treatment (or accept disqualification).
• NSOs expiring: Less urgent; no special tax consequence if you miss expiration.

Tax professionals sometimes advise clients to exercise options before expiration to lock in cost basis at a known price, then hold for long-term gains. But this requires capital and market confidence that the stock will appreciate further.

The expiration date in your grant letter

Your equity grant letter specifies the expiration date. It’s non-negotiable (the 10-year limit for ISOs is federal law). But you can negotiate the post-termination window—the grace period after you leave to exercise before losing the right.