RSU Tax Calculator 2026

What Are RSUs and How Do They Work?

Restricted stock units have become the dominant form of equity compensation in the technology sector and are increasingly common across financial services, pharmaceuticals, and other industries that compete aggressively for talent. An RSU is a promise from your employer to deliver shares of company stock to you at a future date, contingent on meeting certain conditions. Unlike stock options, which give you the right to purchase shares at a predetermined price, RSUs have value from the moment they are granted because they represent actual shares rather than the right to buy shares. You do not pay anything to receive them, and their value on the day they vest becomes part of your taxable income.

The vesting schedule determines when your RSUs convert from a promise into actual shares in your brokerage account. The most common structure is a four-year vesting schedule with a one-year cliff, meaning you receive no shares during your first year of employment, then a large tranche vests at the one-year mark, followed by smaller tranches vesting monthly or quarterly over the remaining three years. Some companies use a graded schedule where an equal percentage vests each year, while others backload the vesting so that more shares vest in later years to encourage long-term retention. Understanding your specific vesting schedule is the starting point for all tax planning around RSU compensation.

Taxation at Vesting Versus Taxation at Sale

The tax treatment of RSUs involves two distinct events, and confusing them is one of the most common financial mistakes employees make. The first tax event occurs on the vesting date, when your RSUs convert into actual shares. At that moment, the fair market value of the vested shares is added to your W-2 income and taxed as ordinary income. If 100 shares vest when the stock price is $150 per share, you have $15,000 of additional ordinary income for that year. This income is subject to federal income tax, state income tax, Social Security tax (up to the wage base), and Medicare tax, just like your regular salary.

The second potential tax event happens when you eventually sell the shares. Your cost basis in the shares is the fair market value on the vesting date, which is the amount that was already taxed as ordinary income. If you sell the shares immediately at vesting, the sale price should be very close to the vesting price, resulting in little or no additional gain. However, if you hold the shares after vesting and the stock price changes, you will realize a capital gain or loss when you sell. Appreciation above the vesting price is taxed as a capital gain, either short-term if you sell within one year of vesting or long-term if you hold for more than a year. A decline below the vesting price produces a capital loss, which can offset other gains or up to $3,000 of ordinary income per year.

The Double-Taxation Misconception

One of the most persistent myths surrounding RSUs is the belief that they are taxed twice. This misconception typically arises when an employee sees income tax withheld at vesting and then sees a gain reported when they sell the shares, leading them to feel that the same money was taxed both times. In reality, the system is designed so that each dollar of value is taxed exactly once, but the confusion stems from a failure to properly account for cost basis.

Here is how it actually works. Suppose you receive 200 RSUs that vest when the stock is at $100 per share. You recognize $20,000 of ordinary income at vesting, which appears on your W-2 and your tax return. Your cost basis in those 200 shares is now $100 per share, or $20,000 total. If you later sell those shares for $130 each, your capital gain is $30 per share, not $130 per share. The $100 per share that was taxed at vesting is not taxed again because it is your cost basis and is subtracted from the sale price. The only additional tax is on the $30 per share of appreciation that occurred after vesting. If people feel double-taxed, it is usually because their brokerage statement shows the full sale proceeds without subtracting the cost basis, or because the cost basis was not properly transferred from the employer's records to the brokerage account. Verifying that your cost basis is correctly reflected in your brokerage records before you sell is one of the most important steps you can take to avoid overpaying taxes on RSU sales.

Withholding Methods for RSU Income

When your RSUs vest, your employer is required to withhold taxes on the income, and the method they use directly affects how many shares end up in your account. The most common approach is called sell-to-cover, where your employer sells enough of your newly vested shares on the open market to cover the estimated tax withholding and deposits the remaining shares into your brokerage account. If 100 shares vest at $200 each and your combined federal, state, and FICA withholding rate is 40 percent, approximately 40 shares would be sold and 60 shares deposited to you.

Some employers offer net share settlement as an alternative, where the company itself withholds shares rather than selling them on the market. The economic result is similar to sell-to-cover, but the mechanics differ because no shares are actually sold on the open market. A smaller number of companies allow employees to choose cash payment, where you write a check to cover the tax withholding and receive all of your vested shares. This option preserves your full share count but requires significant cash on hand.

A critical detail many employees overlook is that the default federal withholding rate on supplemental income, including RSU vesting income, is 22 percent. For RSU vesting amounts exceeding $1 million in a calendar year, the withholding rate jumps to 37 percent. The 22 percent flat rate often results in underwithholding for employees in higher tax brackets, especially when RSU income pushes them into the 32 or 35 percent federal bracket. If your marginal federal rate is 35 percent but only 22 percent was withheld, you could owe a substantial amount when you file your return. Using our paycheck calculator alongside this RSU calculator helps you see the full picture of your withholding across all income sources.

How RSUs Affect Your Overall Tax Bracket

Large RSU vesting events can dramatically alter your tax situation for the year. Because RSU income is treated as ordinary income stacked on top of your salary, a significant vesting event can push you into a higher marginal tax bracket. Consider an employee earning a $180,000 base salary who has $120,000 in RSUs vesting during the year. Their total ordinary income jumps to $300,000, pushing them from the 24 percent federal bracket well into the 32 percent bracket and potentially exposing them to the 0.9 percent Additional Medicare Tax on wages above $200,000.

The bracket creep effect extends beyond federal income tax. State income tax brackets can also shift, and in high-tax states like California or New York, the combined marginal rate on RSU income can approach or exceed 50 percent when you add federal tax, state tax, Social Security, and Medicare together. This is why so many tech employees in high-cost-of-living areas are shocked when they see how many shares are sold to cover taxes at vesting. The withholding may look punishing, but it often falls short of the actual tax owed, and the shortfall must be reconciled at tax filing time.

RSU income can also trigger or increase exposure to other tax provisions. The Pease limitation on itemized deductions, though modified by recent tax law changes, is one example. More significantly, high RSU income can reduce or eliminate eligibility for certain tax credits and deductions that phase out at higher income levels. If you have children, your child tax credit may be reduced. If you are contributing to a Roth IRA, your RSU income could push your modified adjusted gross income above the contribution limits. These cascading effects make it essential to view RSU compensation not in isolation but as part of your entire financial and tax picture.

Planning Around Large RSU Vesting Events

Proactive planning around major RSU vesting dates can save you thousands of dollars in taxes and prevent unpleasant surprises at filing time. The first step is to estimate your total income for the year, including all RSU vesting events, and run the numbers through a tax projection to see where you will land in terms of brackets, surtaxes, and withholding adequacy. If you anticipate owing more than the amount withheld, you should make estimated tax payments during the year or request additional withholding on your W-4 to avoid underpayment penalties.

Maximizing pre-tax retirement contributions is one of the most effective strategies for offsetting RSU income. Contributing the maximum to your employer's 401(k) plan, which allows up to $23,500 in employee deferrals for 2026 plus a $7,500 catch-up contribution if you are over 50, directly reduces your taxable income. If your employer offers a mega backdoor Roth option through after-tax 401(k) contributions with in-plan Roth conversions, this can shelter even more income from current taxation. Health savings account contributions, if you have a qualifying high-deductible health plan, provide another above-the-line deduction that reduces your adjusted gross income and may help you avoid phase-outs and surtaxes.

Charitable giving strategies can also pair well with RSU events. If you hold appreciated shares after vesting and donate them to a qualified charity, you can claim a deduction for the full fair market value without recognizing the capital gain. For employees who are charitably inclined, donating shares that have appreciated since vesting is often more tax-efficient than donating cash. A donor-advised fund can be a useful vehicle for bunching charitable contributions into a high-income year when the deduction provides the greatest benefit.

Comparing RSUs to Stock Options

While RSUs have largely replaced stock options at established public companies, understanding the differences between the two helps employees evaluate their total compensation package. Stock options give you the right to purchase shares at a fixed exercise price, typically the market price on the grant date. If the stock rises above that price, the option has intrinsic value equal to the spread between the current price and the exercise price. If the stock falls below the exercise price, the option is "underwater" and has no immediate value, though it retains time value until it expires.

RSUs, by contrast, always have value as long as the company's stock price is above zero. This built-in value makes RSUs more predictable from the employee's perspective but also means they generate a tax liability at vesting regardless of where the stock price stands. Stock options only trigger a tax event when the employee exercises them, giving the holder more control over the timing of income recognition. An employee with incentive stock options, or ISOs, can potentially achieve even more favorable tax treatment by meeting specific holding period requirements, which convert what would otherwise be ordinary income into long-term capital gain.

From a risk perspective, RSUs represent a more conservative form of equity compensation because they retain value in flat or declining markets. An RSU grant worth $50,000 at vesting always delivers $50,000 of pre-tax value, minus whatever the stock price does between vesting and the moment you sell. Stock options, on the other hand, can expire worthless if the stock price never exceeds the exercise price during the option's life. For employees comparing job offers that include different forms of equity, it is important to consider not just the headline grant value but also the tax treatment, the vesting schedule, the company's stock price trajectory, and your personal risk tolerance. Working through these scenarios with tools like our bonus tax calculator for supplemental income withholding gives you a clearer view of what each compensation package is actually worth after taxes.