What does it mean to exercise vested options?
James Craig
Published Mar 28, 2026
Exercising a stock option means purchasing the issuer’s common stock at the price set by the option (grant price), regardless of the stock’s price at the time you exercise the option. See About Stock Options for more information.
What is the difference between vested and exercised?
You must earn the right to purchase those shares; you need to become vested in those shares. Exercising your options will make you a shareholder and provide you with an investment vehicle with growth potential.
How do you qualify as an ISO?
The Qualifications and Limitations
- ISOs can only be granted to employees.
- Only the first $100,000 that becomes exercisable during any 12 month period can qualify for ISO treatment.
- ISOs to 10% or greater stockholders have to be priced at 110% of FMV and have no more than 5 year term.
“Vesting” refers to the date upon which the stock option becomes exercisable. In other words, the option holder must wait until the option “vests” before he can purchase the stock under the option agreement. A vesting date is a common feature of stock options granted as part of an employee compensation package.
What is the ISO limit?
The $100K ISO limit (also known as the $100K rule) prevents employees from treating more than $100K worth of exercisable options as incentive stock options (ISOs) in a year. Incentive stock options (ISOs), as opposed to non-qualified stock options (NSOs), qualify for favorable tax treatment by the IRS.
Is the vesting of an ISO a taxable event?
Unlike RSUs, vesting isn’t a taxable event for non-qualified stock options (NQSOs) and incentive stock options (ISOs). With options, vesting simply means that you can act upon your ability to exercise that option if you chose. You don’t create a reportable tax event until you exercise.
When do vested stock options have to be exercised?
If you have vested stock options (incentive stock options (ISOs) or non-qualified stock options (NQSOs)) that you have not exercised, you may have the opportunity to do so before you leave the company or within a defined period of time after your departure from the company.
When does an employee have to exercise an ISO?
An employee who separates from employment must exercise any ISO the employee holds within three months of termination to retain the ISO status of the options. 2 Requirements to Qualify Options as ISOs
When does an ISO hold period expire?
As noted earlier, the ISO holding period to receive favorable ISO treatment is two years from the date the ISO was granted and one year from the date that stock was transferred on ISO exercised. A transfer occurs whether or not the stock is vested on exercise of the ISO.