Grant, Vest, Exercise, Sale: The Four Moments Your Stock Comp Gets Taxed
Twice in the past week, someone very smart sat across from me holding a six figure piece of their own compensation and admitted they did not really know how it works. Engineers, directors, people who read contracts for a living. This is not a them problem. Companies hand out stock compensation with a grant letter and a login, and nobody ever explains the machine. So this issue is the explanation: the four moments your stock comp gets taxed, drawn out plainly enough to keep.
RSUs: THE SIMPLER MACHINE
A restricted stock unit is a promise of shares later. At grant, nothing happens; a promise is not income. The moment that matters is the vest. When shares vest, their full market value lands on your W-2 as ordinary income, exactly like a cash bonus you immediately spent on company stock, and your employer withholds federal tax at the flat 22 percent default, which is quietly too low for most high earners. Longtime readers know that gap well. From the vest forward, you simply own stock: sell later and only the growth since vest is a capital gain, held over a year and it is a long term one. Two decisions, that is all. You cannot choose when the vest taxes you. You absolutely choose whether to keep the shares afterward, and keeping is a decision, not a default.
ISOs: THE MACHINE WITH A CLOCK IN IT
Incentive stock options are the opposite personality. At grant, nothing. At exercise, when you pay the strike price and take the shares, there is no regular tax at all, which feels like magic until you meet the fine print: the spread between your strike and the market value counts as income for the alternative minimum tax, and a big exercise can trigger a real AMT bill in a year you sold nothing. Then comes the clock. Hold the shares two years from grant and one year from exercise, and the entire gain from your strike price up gets long term capital gains treatment. Sell before the clock runs out and the spread converts to ordinary income instead. In one breath: ISOs reward patience with a lower rate and charge AMT rent along the way, so the size and timing of an exercise is a planning decision, never an impulse.
THE 83(b) CONFUSION, SETTLED
The 83(b) election generates more anxious questions than anything else in stock comp, and here is the part that defuses most of them: it does not apply to RSUs at all, and not to ordinary options either. An 83(b) belongs to restricted stock and early-exercised options, mostly startup territory, and it lets you choose to be taxed today on a small value so all future growth becomes capital gain. It has one unforgiving rule: the election must be filed within 30 days of the grant, and there are no extensions and no do-overs. If that deadline could apply to you, it is a this-week conversation, not a next-quarter one.
A SIMPLE EXAMPLE
Nora is 37, a director in Columbus with both flavors. In March, RSUs vest: that is income at 22 percent withholding against her 35 percent reality, so the projection flags the gap in the summer and the estimated payment goes on the calendar, money waiting in the money market until it is due. In the fall, she wants to exercise ISOs. We size the exercise against the AMT line instead of exercising the whole grant at once, because the AMT math resets every January and a two year exercise plan can carry the same shares at a fraction of the tax friction. And her vested RSU shares get the same two sided question any stock deserves: if keeping them doubles, what changes about her life, and if they fall by half, what changes? None of these moves required predicting the stock. Every one of them required knowing which moment does the taxing.
THE WHOLE IDEA
Four moments: grant, vest, exercise, sale. Two of them tax you on someone else’s schedule, and two of them are yours to time. The people who get hurt by stock comp are almost never hurt by the stock. They are hurt by learning which moment was taxable after it already happened. A full tax plan, refreshed every year you hold these things, is how the four moments stop being surprises and start being decisions.
CLOSER TO RETIREMENT? FILE THIS AWAY
Before you pick a retirement date, read your stock plan document, specifically the definition of retirement inside it. Many plans keep your unvested awards vesting after you leave once you hit an age plus service formula, and missing that line by a few months can mean walking away from a year of compensation. The same document controls your final option exercise window, often only 90 days after separation for regular options. The date on your resignation letter can be worth more than your last bonus. Read the document first.
WORTH A READ
Topic 427: Stock Options (IRS.gov)
About Form 6251, Alternative Minimum Tax (IRS.gov)
About Form 15620, Section 83(b) Election (IRS.gov)
If any part of your pay arrives as letters instead of dollars, RSUs, ISOs, or a plan document you have never fully read, reply anytime. Happy to walk your grants through the four moments with you.
Curious what working together looks like? There is more at jcsretirementtaxadvisors.com, and if a conversation sounds easier, you can grab 30 minutes on my calendar whenever it suits you. No pressure, just a conversation.
Know someone who should be reading this? Forward it along, that is how most people find me. And if this was forwarded to you, one subscription at buckeyeretirementbrief.beehiiv.com gets you both briefs: retirement on Mondays, equity comp on Thursdays.
Jesse Stacy MTAX, CFP®, EA
JCS Retirement Tax Advisors
This newsletter is for education only and is not tax, legal, or investment advice for your situation. Plan terms vary by employer and the example is illustrative; figures reflect 2026 federal rules.