Cliff Vesting

What Is Cliff Vesting?

Cliff vesting is a vesting structure in which an employee earns no equity until a specific milestone — usually a period of time — is reached. Once that milestone is met, a significant portion of the total grant vests all at once. The most common cliff in startup equity compensation is a one-year cliff, meaning that no shares vest during the first 12 months of employment. On the one-year anniversary, 25% of the total option grant vests in a single block, and the remaining 75% vests incrementally (typically monthly) over the following three years.

How Cliff Vesting Works

The Standard Structure

The industry-standard vesting schedule for startup stock options is a four-year vest with a one-year cliff. Here is how it works in practice:

• Months 1–11: No options have vested. If you leave the company during this period, you forfeit the entire grant.
• Month 12 (the cliff): 25% of your total option grant vests immediately.
• Months 13–48: The remaining 75% of your options vest on a monthly or quarterly basis, in equal increments.

For example, if you are granted 10,000 options, nothing vests for the first year. On your one-year anniversary, 2,500 options vest at once. After that, approximately 208 options vest each month for the next 36 months.

Why Companies Use Cliffs

The cliff serves as a trial period. Hiring is inherently uncertain, and the cliff protects the company from giving equity to employees who leave or are terminated early in their tenure. It ensures that only employees who demonstrate commitment and fit over a meaningful period earn a share of ownership.

Practical Implications for Startup Employees

The Risk of Leaving Before the Cliff

The most important thing to understand about cliff vesting is that leaving before the cliff means walking away with nothing. If you are eight months into your job and decide to leave, you will have zero vested options — even if you have contributed meaningfully to the company. This creates a strong financial incentive to stay at least through the cliff date.

Negotiating Your Cliff

While the one-year cliff is standard, it is not always fixed. Experienced candidates, especially those joining at senior levels, sometimes negotiate a shorter cliff (such as six months) or no cliff at all. If you are leaving a position where you have significant vested equity, this is a reasonable point of negotiation.

Termination Scenarios

If you are terminated before the cliff, most option agreements state that all unvested options are forfeited. Some companies may, at their discretion, accelerate a portion of your vesting, but this is uncommon and not something you should count on unless it is written into your offer letter or employment agreement.

Cliff Vesting and Early Exercise

Some companies allow early exercise, meaning you can exercise unvested options before they vest. In this case, the cliff still applies to vesting, but you can purchase shares early and file an 83(b) election to start the capital gains clock. If you leave before the cliff, the company typically has the right to repurchase your unvested shares at your original exercise price. This distinction between vesting and exercise is important to understand.

How It Relates to Exercising Stock Options

Cliff vesting determines when you first become eligible to exercise vested options. Until the cliff is reached, you have no vested options to exercise (unless your plan permits early exercise). After the cliff, you can begin making exercise decisions — weighing factors like the current 409A valuation, your tax situation, and your confidence in the company's trajectory. The cliff date is effectively the starting line for your option exercise strategy, so plan accordingly.