By Larry Van Quathem, CFP®
Your grant agreement arrived with a vesting schedule, an exercise price, and an acronym you never fully unpacked… so you signed it, filed it away, and left it out of your broader financial planning. Several grants later, you hold a position that may represent a sizable share of your net worth, carrying an expiration date and a tax treatment you would struggle to explain to your spouse.
Equity compensation is one of the few areas where executives who make consequential decisions all day typically put off a decision indefinitely. The cost of waiting tends to show up later, as an unexpected tax bill or a grant that expired without being exercised.
The first step is knowing which kind of option you hold. Incentive stock options (ISOs) and non-qualified stock options (NQSOs) look nearly identical on a statement, and they are taxed under two entirely different sets of rules.
What ISOs and NQSOs Have in Common
Both give you the right to buy company shares at a fixed price, called the strike price, once the options vest, and both typically expire 10 years after they’re granted. Both create value when the market price climbs above your strike price, and that gap between the two is called the bargain element, or the spread.
From there the two diverge, and the question becomes when the IRS taxes spread and at what rate.
NQSOs: Taxed When You Exercise
Companies can grant NQSOs to employees, board members, and outside contractors alike, which makes them the more common of the two.
When you exercise, the spread becomes ordinary compensation income for that year. It appears on your W-2 and is subject to income tax withholding along with Social Security and Medicare. Employers generally withhold federal income tax at a flat 22% on compensation of this kind, and at 37% on any portion above $1 million in a single calendar year.
That flat 22% is where executives often get caught short. If your top tax rate is 35% or 37%, payroll withholding may cover only part of what you owe, and the shortfall surfaces when you file.
Your cost basis, meaning the figure used to measure any future gain, then resets to the share price on the day you exercised. Anything the stock gains after that is a capital gain, taxed at the lower long-term rate if you hold the shares for more than a year.
With NQSOs, the harder questions are about timing and cash flow.
ISOs: Better Tax Treatment, With Conditions
ISOs can go only to employees, and the tax code caps them. No more than $100,000 of options, valued at the grant-date price, can become available to exercise in any single calendar year, and anything above that ceiling is treated as non-qualified.
Exercising ISOs produces no ordinary income under the regular tax rules. If you then hold the shares at least two years from the grant date and at least one year from the exercise date, the entire gain from your strike price to your eventual sale price is taxed as a long-term capital gain, an outcome the IRS calls a qualifying disposition.
Miss either holding period and the spread you captured at exercise converts back into ordinary income. This happens more often than executives anticipate, particularly through same-day cashless exercises, which sell the shares immediately by design.
A second condition applies in the year you exercise. The bargain element on an ISO gets added back into a separate calculation called the alternative minimum tax (AMT), even when you have sold nothing at all. You can owe real tax on a gain that exists only on paper.
Why 2026 Changed the ISO Math
For most of the past decade, the AMT stayed off the radar for top earners. The One Big Beautiful Bill Act, signed in July 2025, made the larger AMT exemption permanent while resetting the rules for how quickly that exemption disappears, beginning in 2026.
For 2026, the exemption is $90,100 for single filers and $140,200 for married couples filing jointly. It begins shrinking once your income under the AMT calculation passes $500,000 for single filers or $1,000,000 for joint filers. Those same thresholds sat at $626,350 and $1,252,700 in 2025, which means the 2026 starting line is considerably lower. Above it, the exemption now falls by 50 cents on every dollar, twice as fast as it did last year, and it disappears completely at $680,200 and $1,280,400.
The exercise itself is part of what carries you toward that line. Because the bargain element counts toward the income figure being tested, a large exercise can push you past the threshold on its own, shrinking your exemption in the same year it creates the tax. An exercise that produced no AMT in 2025 may produce one in 2026 at the same salary and the same share price.
Any AMT you do pay may create a credit, claimed later on IRS Form 8801, that can be recovered in future years, though the timing of that recovery is not yours to control.
The Decisions That Carry Weight
Knowing what you hold is only the starting point. The choices that shape your result include:
- Exercise timing against your other income. A bonus year, a severance package, or a deferred compensation payout can change the outcome considerably.
- Cash on hand. Exercising ISOs and holding the shares takes cash for both the purchase price and any AMT that follows. A cashless exercise solves the cash problem and gives up the favorable tax treatment.
- Concentration. A position that grew through vesting alone can become a large share of household net worth before anyone reviews it.
- Trading windows. Insiders often have far fewer days available to trade than the calendar suggests.
- Departure deadlines. ISOs generally must be exercised within three months of leaving an employer to keep their favorable status.
The sequence of these decisions can change the after-tax result considerably, even when the grant terms themselves are identical. Your grant agreement fixes the terms, and the planning happens inside the choices those terms leave open to you.
If you hold equity compensation and have not mapped how it fits alongside the rest of your finances, that conversation can begin well before your next vesting date.
Run the Numbers Before You Exercise
No two grants carry the same deadlines or the same tax consequences, and the 2026 AMT thresholds land differently depending on the rest of your income for the year.
The team at ABLE Financial Group works with senior-level executives on these decisions, including how the timing of an exercise interacts with bonuses, deferred compensation, and the size of the position you already hold.
If you’d like to go through your grant agreements together and map out the year ahead, call 480.258.6104 or email adam@ablefinancialgroup.com.
Frequently Asked Questions
What’s the difference between ISOs and NQSOs?
The difference comes down to how each one is taxed. ISOs go only to employees and can qualify for the lower long-term capital gains rate on the entire gain if two holding periods are met, though exercising one may trigger alternative minimum tax. NQSOs are taxed as ordinary income at exercise and reported on your W-2.
How are stock options taxed when you exercise them?
It depends on the type. Exercising NQSOs creates ordinary income equal to the gap between your purchase price and the share price, withheld through payroll like a bonus. Exercising ISOs creates no regular income tax, though that same gap is counted when figuring your alternative minimum tax for the year.
Will I owe alternative minimum tax if I exercise incentive stock options?
Possibly, and 2026 raised the odds. The AMT exemption now begins shrinking at $500,000 of income for single filers and $1,000,000 for joint filers, and it falls twice as fast as it did in 2025. An exercise that avoided AMT last year may not avoid it under identical circumstances this year.
What happens to my stock options if I leave my job?
Unvested options are typically forfeited when you go. Vested options come with a deadline, commonly 90 days from your last day. ISOs generally lose their favorable tax status if you do not exercise within three months of leaving, after which they are taxed like non-qualified options. Your plan document controls the specifics.
How do I decide when to exercise my stock options?
Run the tax numbers before the calendar decides for you. What matters most is your projected income for the year, the cash you have available, the expiration dates, your company’s trading windows, and how much of your net worth already sits in company stock. Advisors at ABLE Financial Group help Scottsdale and Phoenix executives model these scenarios.
About Larry
Larry Van Quathem, CFP®, is a Senior Financial Advisor at ABLE Financial Group, where he leverages over 30 years of industry experience to provide tailored transition planning and financial coaching to executives and families. An Arizona native and University of Arizona finance alumnus, he builds personalized, written strategies that simplify complex wealth and keep clients focused on their long-term goals.
