What Is a Restricted Stock Tax Calculator?
A restricted stock tax calculator is a financial planning tool that estimates the taxes you owe when your Restricted Stock Units (RSUs) vest. RSUs are a common form of equity compensation granted by employers, particularly in the technology sector. When RSUs vest, the shares become yours — and the IRS treats the fair market value of those shares as ordinary income, subject to federal income tax, state income tax, Social Security, and Medicare taxes.
Our free restricted stock tax calculator uses real historical stock prices from the FMP API to determine the exact closing price on your vesting dates. This gives you an accurate picture of the taxable income generated by each vesting event, along with a detailed breakdown of federal, state, and FICA taxes based on 2025 tax brackets and rates.
How to Use This Restricted Stock Tax Calculator
- 1
Enter Your Stock Ticker
Type the ticker symbol of the company whose RSUs you hold (e.g., AAPL for Apple, GOOG for Alphabet, MSFT for Microsoft). The calculator will fetch real historical closing prices for this stock.
- 2
Set Your Tax Profile
Select your filing status (Single, Married Filing Jointly, etc.), enter your other annual income (salary, bonuses, etc.), and choose your state tax rate. Your other income determines which federal tax bracket your RSU income falls into.
- 3
Add Your Vesting Events
Enter each vesting date and the number of shares vesting on that date. You can add multiple vesting events to calculate the total tax impact across your entire vesting schedule.
- 4
Review Your Tax Breakdown
Click Calculate Tax to see your total RSU income, federal and state taxes, FICA contributions, effective tax rate, and net after-tax value. The detailed table shows each vesting event with the actual stock price used.
How Are RSUs Taxed?
Restricted Stock Units are taxed at two distinct points: at vesting and at sale. Understanding both events is critical for tax planning.
At Vesting: Ordinary Income Tax
When RSUs vest, the fair market value (FMV) of the shares on the vesting date is treated as ordinary income. This income is subject to federal income tax, state income tax, Social Security tax (6.2% up to the $176,100 wage base in 2025), and Medicare tax (1.45%, plus an additional 0.9% on income over $200,000 for single filers). Most employers withhold taxes by selling a portion of your vested shares — commonly called "sell to cover."
At Sale: Capital Gains Tax
If you hold the shares after vesting and later sell them, any gain or loss from the vesting-date price is treated as a capital gain or loss. If you hold for more than one year after vesting, the gain qualifies for long-term capital gains rates (0%, 15%, or 20%). If you sell within one year, the gain is taxed as short-term capital gains at your ordinary income rate.
Supplemental Withholding Rate
Employers typically withhold federal tax on RSU income at the supplemental income flat rate of 22% (or 37% for amounts over $1 million). This may be more or less than your actual marginal rate, which is why using a calculator like this one is important — you may owe additional tax or receive a refund when you file.
RSU Tax Planning Strategies
While you cannot avoid taxes on RSU vesting income, there are several strategies to manage and optimize your tax liability:
Maximize Pre-Tax Deductions
Contribute the maximum to your 401(k) ($23,500 in 2025, plus $7,500 catch-up if 50+), HSA ($4,300 self-only / $8,550 family), and other pre-tax accounts. This reduces your taxable income and can lower the marginal rate applied to your RSU income.
Charitable Giving with Appreciated Shares
If you hold vested RSU shares that have appreciated, donating them to a qualified charity lets you deduct the full market value while avoiding capital gains tax on the appreciation. This is one of the most tax-efficient ways to give.
Tax-Loss Harvesting
If some of your investments have declined in value, selling them to realize losses can offset the ordinary income from RSU vesting. Up to $3,000 of net capital losses can be deducted against ordinary income each year, with excess losses carried forward.
Estimated Tax Payments
If your employer's supplemental withholding (22%) is less than your actual marginal rate, consider making quarterly estimated tax payments to avoid underpayment penalties. This is especially important for high earners in states with significant income tax.
RSUs vs. Stock Options: Tax Differences
RSUs and stock options are both forms of equity compensation, but they are taxed very differently. RSUs are taxed as ordinary income at vesting based on the full fair market value. Stock options (ISOs and NSOs) are taxed at exercise — NSOs as ordinary income on the spread between exercise price and market price, while ISOs may qualify for capital gains treatment if holding period requirements are met. RSUs have no exercise price and no risk of being "underwater," making them simpler but with less tax flexibility than ISOs.
2025 Federal Tax Brackets for RSU Income
| Tax Rate | Single | Married Filing Jointly |
|---|---|---|
| 10% | $0 – $11,925 | $0 – $23,850 |
| 12% | $11,926 – $48,475 | $23,851 – $96,950 |
| 22% | $48,476 – $103,350 | $96,951 – $206,700 |
| 24% | $103,351 – $197,300 | $206,701 – $394,600 |
| 32% | $197,301 – $250,525 | $394,601 – $501,050 |
| 35% | $250,526 – $626,350 | $501,051 – $751,600 |
| 37% | Over $626,350 | Over $751,600 |
* RSU vesting income is added on top of your other income. The marginal rate applied depends on your total taxable income for the year.