Non-Qualified Stock Options (NSOs)

NSOs are a common type of employee stock option, especially at startups. They offer equity upside but come with immediate tax implications.
• NSOs are taxed as ordinary income at the time of exercise based on the spread between strike price and fair market value
• Unlike ISOs, NSOs can be granted to contractors, board members, and non-employees
• There’s no AMT impact, but payroll taxes may apply
• Any gain after exercise is taxed as capital gains when you sell the shares
• Planning the timing of your exercise can help manage taxes and risk
NSOs can be valuable, but it’s important to understand how taxes affect your real return.
A NSO is a type of employee stock option that gives an employee the right to purchase company stock at a certain price called the strike price. NSOs do not require employment and the expiration date can be extended well over 90 days, although they do not come with the same favorable tax benefits as ISOs. This means they can be given to contractors, advisors, and other non-W2 employees.
NSOs are subject to ordinary income taxes based on the spread between the current FMV and the strike price of the option. As opposed to ISOs, NSO holders will pay taxes which are withheld when exercised. NSOs do have the possibility of an IRS Section 83(i) election where you can defer taxes for 5 years.
The minimum NSO exercise withholding requirement is only 22% for up to $1 million in spread value (37% if over $1 million). Many companies try to estimate the right amount but it isn’t very easy. Companies are required to withhold NSO taxes only for employees. Contractors can be given a 1099 instead, meaning they handle their own payments via quarterly estimated taxes. Regardless of whether the company withholds taxes or you make estimated payments, you will true it up to the required amount when you actually file taxes. That could result in a refund or additional taxes, such as when lottery winners are surprised that they often owe more taxes despite the mandatory withholding at the beginning. If you sell NSO shares you are also responsible for paying quarterly estimated taxes which you calculate yourself. If you don’t pay enough, there are interest penalties when you file next April. Additionally, Medicare, Social Security taxes, and Federal Unemployment Tax are charged on NSO exercises.
If NSOs are sold within a year of exercising after ordinary income tax was paid on the original exercise, short term capital gains are paid on the spread between the final sale price and the FMV at the time of exercise.The short term capital gains on the portion of the income above the FMV from the sale of NSOs can be offset by other capital losses you may have that tax year.
If you hold employee stock options or restricted shares in a private company funded by institutional venture capital, feel free to contact us at the Employee Stock Option Fund for ways to reduce stock option taxes or more information on how we can assist you. By doing so, you can not only avoid the risks associated with investing directly in a startup but possibly improve your taxes as well. For specific tax related support related to stock option exercises, please contact Scott Chou.
or more information on how to monetize your private company equity, please contact us at below.
Written by Jordan Long, Marketing Lead at ESO Fund
Incentive Stock Options (ISOs) have tax advantages, while Non-Qualified Stock Options (NSOs) are taxed as regular income. Click here for more on the differences between ISOs and NSOs.
Yes, taxes at exercise are based on the spread between your strike price and the current FMV. If you have ISOs, you will owe AMT and NSO holders are charged with ordinary income tax.
ESO Fund helps startup employees exercise their stock options without risking their own cash. We provide non-recourse funding, covering 100% of the exercise cost and taxes, so employees can retain ownership and benefit from future upside. If the company doesn’t succeed, you owe us nothing—we take on all the risk.
Yes! ESO Fund considers any option exercise related taxes (AMT or NSO) as part of the exercise cost and includes tax coverage in our funding.
Equity decisions are complex, but you don’t have to navigate them alone. ESO Fund has been helping employees unlock the value of their hard-earned equity for over a decade. Whether you’re exercising, planning for taxes, or looking for liquidity, we’re here to provide clear, non-recourse funding solutions tailored to your situation.
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Schedule a CallThis innovative service promotes and enables a healthier relationship between companies and employees. I my opinion it's valuable to employees and great for the overall tech environment and economy. It is good for nobody when employees feel trapped because they can't afford to leave. In less extreme cases exercising can be expensive and somewhat risky and this is simply a good smart hedge and a good square deal. Brilliant!