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What is a stock option vesting schedule?

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When you get stock options, their vesting schedule is what determines when you’ll actually own and be able to exercise them. 

Vesting schedules are basically the way that companies incentivise their employees to build the company and ‘earn’ their options by sticking around.

Otherwise, employees could exercise their options as soon as they’re granted and jump to another company.

Most companies follow a four-year vesting schedule with a one-year cliff.

If that’s the case for you, you can start exercising 25% of your options after the first year, and 100% of your options after your fourth year.

What is cliff vesting (and how does it work)?

Cliff vesting is a type of vesting schedule where you don’t get any of your options until a certain date.

On that date you get a chunk of your options all at once (the cliff).

After that, you receive a portion of the remaining options until all your options have vested.

The most common cliff vesting schedule is a four-year vesting period with a one-year cliff.

In this case, for the first year, you get nothing at all.

Then on day one of year two, you immediately own 25% of your options.

Then every month after that, you get 1/48th of your options until they’ve all vested at the four year mark.

At that point, they’re 100% yours. (Although, of course, you’ll still need to exercise them.)

Here’s a real-world example of a typical vesting schedule

Let’s say Startup Inc. grants you 10,000 stock options on a four-year vesting period with a one-year cliff.

Here’s how that would play out:

Are there other types of vesting schedules?

While a four-year vesting schedule with a cliff is the most common, it’s not the only vesting schedule out there.

The second most common is a four-year vesting period with no cliff. 

Sometimes this happens when a company gives an employee a bonus options grant (also called a refresh grant). Since the company has already established a good relationship with the employee, rather than attaching a cliff to the bonus, the shares start vesting immediately over the next four years.

There are other types of vesting schedules out there (like a two-year period with a one-year cliff), but they aren’t very common.

Sometimes executives with more leverage negotiate their options to vest under a different schedule that works better for them, but you almost never run into these.

What actually happens when my stock options vest? 

Once your options have vested, you now have the opportunity to exercise your options and purchase shares of the company.

If your company initially granted you 10,000 options, you can now buy up to 10,000 company shares at the strike price they were granted at. (That’s basically what an option is — a right to buy shares of the company at a set price, regardless of the current fair market value of those shares).

That means even if those shares are currently valued at $10, $20, or even $100 a share, you can still buy them for your original strike price — even if that’s just 50 cents a share.

Note that you’ll likely owe taxes on the difference between your strike price and 409A valuation (also known as fair market value).

Do I have to exercise all of my options once they’ve vested?

No. Once they've vested, you can exercise as many or as few options as you’d like. There’s no restriction.

How long do I have to exercise my options once they’ve vested?

Every option comes with an expiration date. Most commonly, that’s 10 years after grant and 90 days after you leave the company.

That means that if you leave the company, you have to exercise the stock options within 90 days, or you'll lose them.

The 10 years after grant is a legal requirement, but the 90 days after you leave the company isn’t.

Some companies are more lenient, and allow you 3, 5 or even 10 years to exercise your stock options even after having left the company. In that case however, if your stock options are ISOs, they'll convert to NSOs, which has some drawbacks.

Can I exercise my stock options before they’ve fully vested?

In some cases, yes.

Some companies will allow employees to do what’s called an early exercise.

Basically, early exercising means you can exercise your options before they vest and before you actually own them. 

It’s a way to save on taxes if it looks like your company’s valuation will keep rising (more on that here).

Even though early exercising is becoming more and more common, not every company allows it. So check with your HR or finance department to see if it’s an option for you.

Is there a way to accelerate the vesting schedule?


Typically once you have a grant, there's not really much you can do about the way that it vests.

But if there’s a special event, like an acquisition, sometimes the company will accelerate the vesting schedule.

So if you’ve been at a company for two years (and you’re on a four-year schedule), your company may accelerate your vesting upon acquisition so that all your options immediately vest and you can own shares in the new company.

We’re also seeing more companies take a friendlier approach to employee equity and vesting schedules when it comes to forced layoffs.

At the start of the pandemic, for example, a lot of companies had to let go of employees. Some of these companies accelerated their employees’ vesting schedule as a form of compensation. 

Other companies accelerated the cliff for laid-off employees who hadn’t reached the one-year mark. That way, they got to keep at least 25% of their options.

It’s not very common, but it’s happening more and more often.

What if I leave my company (or get laid off) before all my options vest?

Your options will only vest while you are working at the company.

In the event that you leave before they fully vest, your vesting schedule will stop.

Anything that’s vested is yours to keep (though you’ll have a limited window to exercise them). Anything that hasn't vested will be returned to the company, 

Let's say that you've worked at your company for three years and you decide to leave — 75% of your options will have vested and you’ll keep the possibility to exercise them.

Unfortunately, the remaining 25% won't belong to you. They’ll still belong to the company.

Where can I find out what my vesting schedule is?

Your vesting schedule will be detailed in your stock option grant documents. These are the documents your company gives you when you get an offer.

Or, if your company uses an equity management platform (such as Carta), you can find the details of your vesting schedule there — as well as how many options have already vested.

Final thoughts

Vesting schedules are usually pretty straightforward. There’s not a lot of complexity to them.

It’s a different story once your options vest, though. At that point you’re faced with the decision of if, when, and how to exercise your options.

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