RSU Tax Calculator
Estimate your tax liability and net take-home shares when your Restricted Stock Units vest.
Set to 1.45% if you exceed the Social Security wage base.
Total Gross Vest Value
Net Take-Home Value
Total Taxes Owed
*Brokerages typically round up the number of shares sold to cover taxes, refunding any fractional difference as cash.
Ultimate RSU Tax Calculator: Estimate Your Restricted Stock Unit Taxes (USA)
If you work for a publicly traded tech company or a fast-growing startup in the United States, Restricted Stock Units (RSUs) are likely a major part of your compensation package. While RSUs are an excellent way to build long-term wealth, the tax implications at the time of vesting can catch many employees off guard. The TrueAI RSU Tax Calculator is specifically designed to help you instantly estimate your tax liability and calculate your net take-home shares.
What Are Restricted Stock Units (RSUs) and How Are They Taxed?
Unlike stock options, which give you the right to buy shares at a set price, RSUs are a direct grant of company shares. However, you don't actually own these shares until they vest (a timeline set by your employer).
In the USA, the IRS treats the total value of your RSUs on the vesting date as ordinary W-2 income. For example, if 100 shares vest and the fair market value (FMV) is $150 per share, you have just "earned" $15,000 in ordinary income. Because this is income, your employer is legally required to withhold taxes immediately upon vesting.
The RSU Tax Withholding Breakdown
When calculating taxes on RSUs, there are three primary tax categories you need to account for. Our calculator automatically factors these in:
- Federal Supplemental Income Tax (22% or 37%): The IRS classifies RSU vesting as "supplemental wages." For supplemental income up to $1 million during the calendar year, employers are required to withhold a flat statutory rate of 22%. If your supplemental wages exceed $1 million, the mandatory withholding rate increases to 37%.
- State Income Tax: State tax withholding rates for RSUs vary drastically depending on where you live and work. High-tax states like California and New York have specific, higher supplemental withholding rates (often around 10.23% to 11.73% for CA), whereas states like Texas, Washington, and Florida have a 0% state income tax.
- FICA (Social Security & Medicare): You are required to pay the standard 7.65% FICA tax on your vested RSUs. This consists of 6.2% for Social Security and 1.45% for Medicare. Pro Tip: If your regular salary already exceeds the annual Social Security wage base limit, you only need to pay the 1.45% Medicare portion on your RSUs. You can easily adjust this in our calculator.
Understanding "Sell to Cover" for RSU Taxes
A common question is: "If my RSUs are taxed immediately, how do I pay the IRS without using my own cash savings?"
Most employers and brokerages (like Fidelity, Charles Schwab, E*TRADE, or Morgan Stanley) handle this through a mechanism called "Sell to Cover" or "Share Surrender." When your RSUs vest, the brokerage automatically sells a portion of your newly vested shares to generate enough cash to cover the required Federal, State, and FICA withholdings. The cash is sent to the IRS, and the remaining "net shares" are deposited into your brokerage account.
Our RSU Sell to Cover Calculator takes the guesswork out of this process by estimating exactly how many shares your brokerage will need to liquidate and how many you will get to keep. Because brokerages cannot sell fractional shares to cover taxes, they typically round up to the nearest whole share and refund the difference to you in cash.
How to Use the RSU Vesting Calculator
Using our tool is simple and takes less than a minute. Follow these steps to generate your personalized RSU tax report:
- Enter Number of Shares: Input the exact number of RSUs that are scheduled to vest.
- Enter Market Price: Input the current or expected stock price (Fair Market Value) on your vesting date.
- Confirm Federal Tax Rate: This is pre-set to the standard 22% IRS supplemental rate.
- Input State Tax Rate: Enter your specific state's income tax rate.
- Adjust FICA Tax: Leave at 7.65% unless you have capped out your Social Security contributions for the year, in which case, change it to 1.45%.
- Calculate: Click "Calculate Vesting Taxes" to instantly see your Gross Value, Total Taxes Owed, Shares Sold to Cover, and Net Take-Home Shares.
Important Note on RSU Taxes and Year-End Filing
It is crucial to understand that the 22% federal withholding is merely a statutory estimate. It is not necessarily your actual tax bracket. If your overall annual income puts you in a higher effective tax bracket (e.g., 24%, 32%, or 35%), the initial 22% withheld by your employer will not be enough to cover your actual tax liability. In this scenario, you will owe the IRS the difference when you file your tax return in April.
Conversely, if your effective tax rate is lower than 22%, you will receive the overpaid amount as a tax refund.
Frequently Asked Questions About RSU Taxes
Get clear answers to the most common questions regarding Restricted Stock Unit taxation and vesting.
You do not pay Capital Gains Tax when your RSUs vest; you pay ordinary income tax. However, if you decide to hold onto your net shares after they vest and sell them at a later date, you will owe Capital Gains Tax on any profit made between the vest price and your final sale price. If you hold the shares for more than one year after the vesting date, you qualify for the favorable Long-Term Capital Gains tax rate.
It often feels like RSUs are taxed at a much higher rate because they are subject to the IRS "supplemental wage" withholding rules. The automatic 22% Federal tax, combined with State tax and FICA, can easily push the total withholding rate to 35% or 40% depending on your location. Remember, this is just the upfront withholding; your actual tax liability is determined when you file your annual tax return.
Your tax liability is locked in based on the stock's Fair Market Value on the day of vesting. If the stock price drops significantly the next week, you still owe taxes based on that original, higher vesting price. If you eventually sell the stock at a loss, you can claim a capital loss on your taxes to offset other capital gains (or up to $3,000 of ordinary income).
No, there is no legal way to avoid paying ordinary income tax on RSUs when they vest. However, you can manage your overall tax burden by utilizing tax-advantaged accounts (like maxing out your 401(k), HSA, or IRA), which can help lower your overall taxable income for the year.
Many financial advisors recommend selling your RSUs immediately upon vesting to diversify your portfolio. Since you have already paid ordinary income tax on the vesting value, selling immediately usually results in little to no capital gains tax. Holding the stock means tying your financial success entirely to one company—your employer.