For many employees at technology companies in San Francisco and Raleigh, restricted stock units have become one of the more significant components of overall compensation. Employees at firms such as NVIDIA and Microsoft, along with countless others across both markets, may find that a single vesting event carries more tax consequence than an entire year of salary. Understanding how that moment is treated — and what decisions surround it — is often the first step toward more thoughtful, coordinated planning.
What Happens When RSUs Vest
An RSU is a promise from an employer to deliver shares of company stock once certain conditions, typically continued employment over a specified period, have been met. Unlike stock options, there is generally no purchase decision involved — once the shares vest, they belong to the employee.
That simplicity is part of what makes RSUs appealing, but it can also create a planning blind spot. The moment shares vest is not simply a delivery of stock; it is generally treated as a compensation event. The value of the shares on the vesting date is typically included in ordinary income, much like a bonus, and is generally subject to payroll withholding.
This is where many employees encounter their first real surprise. Employers often withhold at a standard supplemental wage rate, which may not reflect an individual's actual marginal tax position — particularly for households in California, where combined federal and state obligations can be considerably higher than what standard withholding is designed to cover. An employee who assumes the withholding "took care of it" may find, well after the fact, that additional tax is owed. The IRS's own guidance on equity-based compensation confirms that RSUs are treated as a form of compensation subject to these general income-recognition rules.
Why the Vesting Decision Deserves Attention
Because the vesting event is fundamentally a tax event, the more consequential planning questions tend to be tax-driven rather than purely investment-driven:
- Does the standard withholding rate come close to covering the actual liability? For a household already in a higher tax bracket, or for one that lives in a state with meaningful income tax, the answer is often no.
- Should additional shares be sold at vesting to cover the shortfall, rather than waiting until the following April to discover a gap?
- How does a large vesting event affect estimated tax payments for the remainder of the year, particularly for a household that receives multiple vesting tranches?
These are the kinds of decisions employees are generally willing to act on, because they involve a concrete dollar consequence with a deadline attached. By contrast, the broader question of whether to hold or sell the shares long-term — the concentration question — tends to be approached far more gradually, and often not until a separate planning conversation altogether.
The Hidden Opportunity
I've mentioned "The Hidden Opportunity" in past articles. While there is an opportunity here for employees with RSUs to learn about their benefits and complexities, there is also an opportunity to learn more about taxes. This means multiple opportunities to master the art of navigating taxes, some of which may include: Net Investment Income Tax (NIIT), Alternative Minimum Tax (AMT), FICA, Additional Medicare Tax (also known as the Medicare surtax), and possible city or local taxes. Most of these are advanced topics, but below we'll tackle federal and state taxes in broad terms.
My point is this: whether you're discussing RSUs, NSOs, ISOs, or ESPPs, the nuances of tax implications are inherently tied to each of these forms of employee compensation. If you're an employee in tech who will likely receive many of these valuable compensation benefits in the future — slow down and take the time to learn the details surrounding your benefits through a tax lens.
Tax knowledge doesn't just protect your wealth — it transforms it; the employee who understands the tax terrain doesn't just survive equity compensation, they master it, turning complexity into clarity and clarity into wealth that compounds long after the vesting schedule ends.
Federal Tax Considerations
At the federal level, the value of RSU shares on the vesting date is generally treated as ordinary income, taxed at the employee's marginal rate rather than at capital-gains rates. Once the shares have vested and the employee owns them outright, any further appreciation — or decline — from that point forward is treated separately, as a capital gain or loss, based on how long the shares are subsequently held.
This distinction matters. The compensation portion of an RSU is generally not eligible for preferential tax treatment, regardless of how long the underlying company has been held in a broader sense. It is only the appreciation after vesting that has the potential to qualify for capital-gains treatment, and generally only after the shares have been held for the requisite period. Because capital-gains treatment is often preferable to ordinary-income treatment, some employees choose to hold a portion of vested shares with this distinction in mind — though that decision should be weighed against the additional concentration and market risk that holding creates.
The applicable rates and thresholds for both ordinary income and capital gains change periodically, so rather than anchor to a specific figure, it is generally more useful to understand the mechanism: vesting income now, potential capital treatment later, and a withholding system that may not fully bridge the two. This is one of several themes we return to often; readers may also find our earlier piece on high-net-worth tax strategies a useful companion.
State Tax Considerations: A Tale of Two States
State taxation adds a meaningful additional layer, and the outcome can differ substantially depending on where an employee lives and works. North Carolina and California offer a useful contrast.
North Carolina applies a comparatively modest, flat individual income tax, as reflected on the North Carolina Department of Revenue's tax rate schedules. An employee living and working in Raleigh will generally see less state-level erosion of an RSU vesting event than a counterpart in the Bay Area, all else being equal.
California, by contrast, taxes both ordinary income and capital gains under the same progressive state income tax structure, with no separate, preferential rate for capital gains at the state level. For a San Francisco-based employee experiencing a substantial vesting event, the combined federal and California tax exposure can be considerably more significant than for a similarly situated employee elsewhere. The California Franchise Tax Board's guidance on equity-based compensation outlines how the state approaches these awards.
There is an added complexity worth noting for employees who move between the two: California may continue to tax compensation connected to work performed while a California resident, even after an employee has relocated to North Carolina or another state. Simply changing a mailing address does not necessarily eliminate exposure to income that was earned, or that vested, while the employee was still subject to California's tax rules. The Financial Planning Association's overview of nonresident equity-compensation taxation discusses this dynamic in more depth. This sourcing question deserves its own dedicated discussion, but it is worth keeping in mind even at this foundational stage.
Bringing It Together
An RSU vesting event is rarely just a payday. It is a compensation event with immediate tax consequences, a withholding system that may not fully match the actual liability, and — depending on where the employee lives — a state tax layer that can vary considerably in its impact. For employees at NVIDIA, Microsoft, and comparable employers across San Francisco and Raleigh, understanding these mechanics is generally the first step toward coordinating equity compensation with the broader financial picture: cash flow, diversification, retirement planning, and the household's overall tax situation.
The decisions that follow — how much to sell, when to sell it, and how to plan for the next vesting cycle — are best made with a complete view of federal and state tax exposure, alongside the household's broader goals. That kind of coordinated planning is often where working with a Private Wealth Advisor, alongside a CPA and other professionals, becomes most valuable. For a broader look at how earning power compounds over a career in technology, our earlier article on ultra-high-net-worth earning power may also be of interest.
Frequently Asked Questions
Are RSUs taxed when they are granted, or when they vest?
Generally, RSUs are not taxed at grant. The taxable event is typically the vesting date, when the shares are delivered and the fair market value on that date is generally included in ordinary income.
Does selling RSU shares immediately after vesting create a separate tax bill?
Selling shares at, or very close to, the vesting date generally results in little additional gain or loss, since the shares' cost basis is generally established at the vesting-date value. Any meaningful gain or loss tends to arise from later price movement, not from the sale itself.
Is the standard withholding on RSUs usually enough to cover the full tax liability?
Not necessarily. Employers often withhold at a flat supplemental rate, which may not reflect a household's actual marginal tax position, particularly for higher-income households or those in states with meaningful income tax. This is generally a question worth reviewing with a tax professional at each vesting event.
Does moving from California to North Carolina eliminate California tax on previously earned equity compensation?
Not automatically. California may continue to tax compensation connected to services performed while an employee was a California resident, even after a subsequent move. The specific outcome generally depends on the timing of the grant, vesting, and relocation, and is worth reviewing with a qualified tax professional.
How does an RSU vesting event affect estimated tax payments?
A large vesting event can meaningfully increase a household's income for the year, which may affect whether existing withholding and estimated payments remain sufficient. This is generally worth evaluating alongside a tax professional, particularly for households with multiple vesting tranches throughout the year.