RSUs 101: How the Tax Treatment Works
Restricted stock units (RSUs) are a form of compensation that many NYC workers receive, especially in tech, finance, and professional services. Understanding how they're taxed is critical to managing your cash flow and tax planning.
When your RSUs vest, the IRS treats the fair market value of the shares on that date as ordinary income — the same as a paycheck. It doesn't matter that you received shares rather than cash. The vest-date value is added to your W-2 income for the year, and you owe income taxes on it at your marginal rates. This means RSU income is not taxed as capital gains at vesting — it's taxed at the higher ordinary income rates.
Key rule: RSUs are taxed as ordinary income at vest date fair market value. Federal rates up to 37%, plus NY State up to 10.9%, plus NYC local up to 3.876% — totaling as much as 45% for high earners in NYC before FICA.
The NYC Triple Tax Hit on RSU Vesting
What makes NYC RSU taxation especially significant is that you're subject to three separate income tax systems simultaneously, plus FICA payroll taxes. Workers in Texas or Florida only owe federal income tax on RSU vesting — no state income tax at all. NYC residents owe all of the following on the same vest-date dollars:
- Federal income tax: 22% at $47,151–$100,525, 24% up to $191,950, 32% up to $243,725, 35% up to $609,350, 37% above that (2026 brackets, single filer)
- New York State income tax: up to 9.65% for incomes over $215,400, up to 10.3% above $1M, 10.9% above $25M
- NYC local income tax: 3.876% at the top bracket (income over $50,000 for single filers)
- Social Security: 6.2% on RSU income up to the $176,100 combined wage base for 2026
- Medicare: 1.45%, plus 0.9% additional Medicare tax on earned income above $200,000 (single)
Real Example: 100 Shares Vesting at $150,000 Base Salary
Suppose 100 shares of your company vest at $50 per share on a single vest date. That's $5,000 of ordinary income added to your W-2. If your base salary is $150,000, that $5,000 lands squarely in the 32% federal bracket. Here's the full tax hit on those 100 shares:
| Tax | Rate | Amount on $5,000 |
|---|---|---|
| Federal Income Tax | 32% | $1,600 |
| NY State Income Tax | 6.85% | $343 |
| NYC Local Tax | 3.876% | $194 |
| Medicare (1.45% + 0.9% add'l) | 2.35% | $118 |
| Social Security (if under $176,100 total) | 6.2% | $310 |
| Total Taxes | ~51% | ~$2,565 |
| Net Value After Tax | ~$2,435 |
If your total YTD wages already exceed $176,100, Social Security doesn't apply to the RSU income, dropping total taxes to roughly 43%.
FICA Taxes on RSUs: Often Overlooked
Many RSU recipients focus on income taxes and overlook FICA — Social Security and Medicare — which also apply to RSU vest income. Social Security tax (6.2%) applies on income up to $176,100 for 2026. If you vest shares early in the year before hitting that cap, Social Security adds another 6.2% to your tax rate on the vest income. Late-year vesting when you've already exceeded the cap means no Social Security tax, which makes a meaningful difference to your net proceeds.
Medicare tax applies to all RSU income with no cap: 1.45% on income up to $200,000 (single filer), plus an additional 0.9% on income above that threshold. High earners in NYC routinely pay 2.35% Medicare on RSU income.
The Withholding Shortfall Problem
Here's where many NYC tech and finance workers get into trouble: their employer typically withholds only the 22% federal flat rate on RSU vest income (the same supplemental wage rate used for bonuses), even if their actual marginal federal rate is 32% or 35%.
Companies handle RSU tax withholding in one of two ways:
- Sell-to-cover: The company sells enough shares to cover the estimated withholding taxes, and you receive the remaining shares. The sale is reported on your brokerage 1099-B.
- Net share settlement: The company simply doesn't deliver the shares that would be needed to cover taxes — you receive fewer shares and the company remits the tax. No sale occurs.
In both cases, if only 22% federal is withheld but your actual marginal rate is 32–37%, you face a shortfall. A $50,000 vest at a 10% shortfall rate means $5,000 in under-withheld federal taxes alone — plus any state underpayment. This is a common cause of large April tax bills for NYC tech employees. The solution is to make estimated quarterly tax payments to cover the gap.
Action item: If your employer withholds only 22% on RSUs but your marginal rate is higher, calculate the expected shortfall and make quarterly estimated payments using IRS Form 1040-ES and NY Form IT-2105 to avoid underpayment penalties.
After Vesting: Capital Gains Treatment
Once shares vest and you own them, any subsequent price change creates a capital gain or loss — not ordinary income. The clock starts ticking on your holding period from the vest date.
- Short-term capital gain/loss: If you sell within one year of vesting, gains are taxed as ordinary income — the same rate as the vest income itself.
- Long-term capital gain/loss: If you hold shares more than one year from vest before selling, gains qualify for the preferential long-term capital gains rate (0%, 15%, or 20% federal). New York State and NYC tax long-term capital gains at ordinary income rates — there is no preferential state/city rate for long-term gains in New York.
Your cost basis in vested shares equals the fair market value on the vest date — the same value reported as ordinary income on your W-2. Selling immediately at the vest price generates no additional gain or loss; the entire tax was already captured at vesting.
RSU Tax Comparison: NYC vs. Texas vs. California
| Location | Federal | State | Local | Approx. Total Rate* |
|---|---|---|---|---|
| New York City | 32–37% | 6.85–9.65% | 3.876% | ~42–50% |
| California (SF/LA) | 32–37% | 9.3–13.3% | None | ~41–50% |
| Texas (Austin/Dallas) | 32–37% | None | None | ~34–39% |
| Florida (Miami) | 32–37% | None | None | ~34–39% |
*Excludes FICA; assumes income above $200,000 so SS wage base is exceeded.
Strategies to Manage RSU Tax in NYC
Increase 401(k) Contributions in High-Vest Years
In a year when a large RSU tranche vests, consider maximizing your 401(k) contribution ($23,500 in 2026, $31,000 if 50+). Pre-tax deferrals reduce your W-2 income and lower the marginal rate applied to the RSU income. If your employer offers a mega backdoor Roth option via after-tax contributions, that's additional shelter.
Make Estimated Tax Payments
If your withholding shortfall is significant, pay estimated taxes each quarter rather than waiting until April. You'll avoid the underpayment penalty (which runs at the federal short-term rate plus 3%) and avoid a large lump-sum due date shock.
Don't Hold All Your RSUs (Concentration Risk)
Holding large amounts of your employer's stock creates concentration risk — you're already economically dependent on your employer for your salary, and holding undiversified stock adds equity risk on top. Many financial planners recommend selling a portion of vested RSUs promptly and reinvesting in diversified assets. The tax cost of selling is real, but so is the risk of holding a concentrated position.
Consider Moving Before a Large Vest
This is a significant life decision, but for very large vesting events, some workers do consider relocating out of NYC before shares vest to avoid state and city tax. If you move to a no-income-tax state before your vest date — and actually establish domicile there — you can potentially save 9.7% in combined NY State and NYC tax. However, New York's sourcing rules for equity income are complex and aggressively audited. Consult a tax attorney before attempting this strategy.
Calculate Your NYC Take-Home Pay
Use the calculator to see your after-tax take-home on salary alone — then factor in RSU vesting for the full picture.
Use the Free Calculator →Frequently Asked Questions
Do I owe NYC tax on RSUs if I work from home in NJ?
If you are an NYC resident, yes — you owe NYC local income tax on all income including RSU vest income, regardless of where you physically work. NYC local tax is based on residency, not where your work is performed. Only if you are a non-NYC resident (e.g., you live in NJ and commute in) would your RSU vest days matter for NYC allocation purposes.
Why did my company only withhold 22% on RSUs when my marginal rate is higher?
Employers are permitted by the IRS to apply the 22% flat supplemental withholding rate to RSUs, regardless of your actual marginal bracket. This simplifies payroll but routinely causes under-withholding for employees in the 24–37% federal brackets. The gap between 22% withheld and your actual rate becomes a tax bill due in April. Making quarterly estimated payments solves this problem.
What is the cost basis of vested RSUs?
Your tax cost basis is the fair market value on the vest date — the same amount reported as ordinary income on your W-2. If you sell immediately at that price, no additional gain or loss exists. Shares that appreciate after vesting generate capital gains (short-term or long-term depending on holding period) measured from the vest-date basis. Shares that decline in value after vesting generate a capital loss you can use to offset other gains.