What You Should Know About NSOs
By James McDougal, CFP® | July 7, 2026
This article is for informational purposes only and does not constitute tax, legal, or financial advice. Tax rates and IRS rules are subject to change; consult a qualified tax professional before making decisions about your equity compensation.
Picture this: you've just gotten a job offer, and it sounds pretty good. The base compensation is a healthy raise from your last role, they're offering some creative non-cash benefits (shout-out to employer-sponsored pet insurance), and the cherry on top is a stock option grant that looks like it's made up of Incentive Stock Options (ISOs) and Non-Qualified Stock Options (NSOs). You've taken the evening to celebrate, and now it's time to dive into the mechanics of this special form of option agreement.
What are NSOs?
Non-Qualified Stock Options (NSOs) are a form of option agreement where an employer allows a grant recipient to purchase shares in their company at a set price (the strike price), typically subject to a vesting schedule and with a predetermined expiration date. Under ideal circumstances, you'd find yourself in a position where the company's share price has appreciated considerably from where it was at the time of grant, allowing you to exercise your options at a strike price lower than the current fair market value.
Because there's often a vesting component, companies will use NSOs as a tool for employee retention. The company's calculus usually looks something like this: if they can incentivize their employees to stick around, that will hopefully mean good news for their share price, and a higher share price increases total compensation without the company having to shell out extra cash. Sounds like magic, but good management practices often are.
Before we talk about what happens after your NSOs vest, it's worth pausing to make sure you know how they differ from ISOs.
What's the difference between ISOs and NSOs?
If your offer letter mentions both ISOs and NSOs in the same breath, you're not imagining things! Companies often grant a mix of the two, and they carry distinct tax characteristics. Here are the big differences at a glance:
| NSOs | ISOs | |
|---|---|---|
| Who can receive them | Employees, contractors, advisors, board members | Employees only |
| Tax at exercise | Ordinary income on the option spread | Generally none (may trigger AMT) |
| Withholding at exercise | Required | Not required |
| Special holding-period benefit | None | Yes, if held 2 years from grant and 1 year from exercise |
| Payroll Taxes (FICA & Medicare) | Yes; owed on the income from the option spread | None |
Now that we have an understanding of how NSOs differ from ISOs, how do you know when to exercise them?
When should I exercise my NSOs?
Ideally, you'll exercise your NSOs when three conditions are met: your options have vested, the strike price is below the current fair market value, and you have immediate access to liquidity. The first two conditions likely feel straightforward, but why the third?
Unlike Incentive Stock Options (ISOs), NSOs don't offer special tax incentives for holding your shares after exercising them. In fact, you should typically expect a tax bill as soon as you exercise, and that bill can be tough to manage without liquidity. To make matters trickier, you may not have access to liquidity at all for a long stretch, as is so common at bright-eyed startups. The real risk to watch for is ending up out of cash with no clear sense of when you'll recoup it. That's not to say it's never a good idea to exercise NSOs without immediate liquidity, only that the use cases are fewer than with ISOs.
Now that we understand when exercising makes sense, let’s take a look at how NSOs are taxed.
What are the tax implications of exercising NSOs?
Immediately upon exercise, you should expect to recognize the difference between the strike price and fair market value as Ordinary Income, subject to the same tax tables as your wage income. If you're an employee of the company who granted the options, your company will be required to withhold income and payroll taxes on the 'spread'.
One very important item to note here is that this income will most likely be treated as Supplemental Wage Income, which is subject to a flat withholding rate and often undershoots your true tax liability. As of the writing of this article, those withholding rates are 22% on the first $1M of supplemental wage income, and 37% thereafter.
After your options have been exercised, you have two options: either sell the shares immediately or hold them into the future. Selling your shares less than a year after exercise will result in a Short-Term Capital Gain on the difference between the fair market values at exercise and sale, and selling more than a year after exercise will likewise result in a Long-Term Capital Gain. And please note, the company's withholding obligation only applies to the income recognized at exercise, not the capital gain post-exercise.
Beyond the simple explanation of exercising, you’ve likely heard about different forms of exercise. Let’s take a moment to unpack that.
What are the different types of NSO exercise transactions?
You'll see a variety of jargon out there, but we'll group all NSO exercises into two categories for the sake of this article: Exercise-and-Hold and Cashless Exercise.
| Exercise-and-Hold | Cashless Exercise | |
|---|---|---|
| Upfront cost | Paid by the option holder | None |
| How the cost is covered | Cash, financing, or tendered shares | Broker or company sells or withholds settled shares |
| What you receive | Settled shares, net of withholding | Remaining shares (net exercise) or cash (same-day sale) |
Remember that these transactions can typically only take place where your options have vested, but what about situations where you can early-exercise?
What does it mean to Early-Exercise NSOs?
Early-exercising is a special opportunity where your company agrees to allow you to exercise your NSOs prior to the stated vesting date. The key here is that early-exercising can allow you to recognize Ordinary Income on a lower spread between strike price and fair market value than you otherwise would by waiting until your options have vested. But it does come with certain nuances that are important to understand.
When early-exercising makes sense:
You expect your company's share price to rise, minimizing the Ordinary Income recognized on the option spread.
The strike price and fair market value are equal, resulting in zero Ordinary Income on exercise (common with newly-granted options)
When early-exercising may not make sense:
You expect to leave your company before the stated vesting date or otherwise don't satisfy the vesting requirements.
Option agreements typically specify that you forfeit your shares in these situations. This can result in a situation where you've paid exercise cost and taxes on shares you'll never receive — womp womp.
If you do early-exercise, it's imperative that you file an 83(b) Election within 30 days of exercising, or you'll risk negating the tax benefits mentioned just above. Missing the boat on an 83(b) election means you'll be paying the exercise cost today only to recognize the full spread between strike price and fair market value as ordinary income upon vesting.
Read more about 83(b) elections in our Getting a Grip on Restricted Stock article.
NSO Exercise Checklist
NSO Exercise Checklist
Not sure where to start? Work through this in order:
| ☐ | Confirm vesting status. Have your options vested, or are you able to early-exercise? |
| ☐ | Check the spread. Is the strike price below the current fair market value? |
| ☐ | Confirm liquidity. Do you have cash to cover the exercise cost and tax bill? |
| ☐ | Confirm sellability. Will you be able to immediately sell your shares? |
| ☐ | Choose your exercise type. Exercise-and-Hold (if you have cash and want to hold) or Cashless Exercise (if you don't, or want to sell). |
| ☐ | Double-check withholding. Supplemental Wage withholding often undershoots your true tax liability. Don't assume you're covered. |
| ☐ | Early-exercising? Mark your calendar: you have 30 days from exercise to file your 83(b) Election. |
Unlock your NSOs with HiFi Planning
Vesting schedules, exercise types, supplemental withholding, and a 30-day election window that waits for no one can be a lot to juggle for one line item on your compensation package. If you've read this far, you're probably ready to make the most of your NSO grant. HiFi Planning specializes in offering tailored financial and tax planning to help people just like you make the most of their equity compensation. Schedule your Discovery Call with HiFi Planning today to make your NSO grant work for you!
