If part of your compensation comes as restricted stock units, or RSUs, understanding how they are taxed is essential, because the tax treatment can catch people off guard and lead to unexpected bills. RSUs are a common form of equity pay, especially at larger companies, and the rules are more straightforward than they first appear. This guide from The Finance Reveal explains how RSUs are taxed, part of our Taxes section. This is general education about the US tax system, not tax advice, and rules change, so consult current official guidance or a tax professional.

What RSUs Are

Restricted stock units are a promise from your employer to give you company shares in the future, once certain conditions are met, usually staying employed until a vesting date. Before vesting, RSUs are just a promise; you do not yet own the shares and cannot sell them. When they vest, the shares become actually yours, and that vesting moment is the key event for tax purposes. Companies use RSUs to reward and retain employees by tying part of their pay to the company’s stock.

The important thing to grasp is that RSUs have two potential tax moments: when they vest, and later when you sell the shares. These are taxed differently, and confusing them is where most misunderstandings arise. Getting clear on both is the foundation for handling RSUs well, and it fits into the broader income picture our guide to tax basics describes.

The Two Tax Moments

RSUs are taxed once at vesting and potentially again at sale. The table below summarizes both.

When RSUs vest, the fair market value of the shares on that date is generally treated as ordinary income, much like salary, and is added to your taxable compensation for the year. Employers usually withhold taxes at vesting, often by holding back some of the shares to cover the bill. Then, if you keep the shares and later sell them, any change in value from the vesting date counts as a capital gain or loss. If the shares rose since vesting, that increase is a capital gain, taxed at short-term or long-term rates depending on how long you held them after vesting, the distinction our guide to capital gains tax explains. So vesting is ordinary income; post-vesting appreciation is capital gains.

Avoiding Common Surprises

A frequent surprise is under-withholding at vesting. The tax withheld on vested RSUs may not fully cover what you owe at your actual tax rate, especially if the RSUs push you into a higher bracket, so some people end up owing more at tax time than expected. It is worth checking whether enough was withheld and, if not, planning for the difference, perhaps through additional payments or adjusting other withholding.

Another point is the decision of whether to hold or sell vested shares. Since you already paid ordinary income tax on the value at vesting, that value becomes your cost basis, and only further gains are taxed when you sell. Some people sell immediately to diversify and avoid having too much wealth tied to one company’s stock, while others hold, accepting the risk, to aim for long-term capital gains treatment on future appreciation. There is no single right answer; it depends on your goals and risk tolerance. Because RSU taxation interacts with your overall income and can be significant, it is a common reason to seek professional advice, the judgment our guide to doing your own taxes versus hiring a professional considers. For related basics, see our guide to tax basics, and explore the full Taxes section.

Frequently Asked Questions

How are RSUs taxed?

RSUs are taxed at two points. When they vest, the fair market value of the shares is treated as ordinary income and added to your taxable compensation, with taxes usually withheld, often by holding back some shares. Later, if you sell the shares, any gain since vesting is taxed as a capital gain, at short-term or long-term rates depending on how long you held them after vesting. Vesting is ordinary income; later appreciation is capital gains.

Do I pay tax when RSUs vest or when I sell?

Both, potentially. You are taxed at vesting on the shares’ value as ordinary income, and taxes are typically withheld then. You are taxed again only if you sell later and the shares gained value since vesting, with that increase treated as a capital gain. If the shares lost value after vesting, selling could produce a capital loss. So vesting always triggers income tax; sale triggers capital gains tax on any further gain.

Why did I owe extra tax on my RSUs?

A common reason is that the tax withheld at vesting did not fully cover what you owed at your actual rate, particularly if the RSU income pushed you into a higher bracket. Default withholding on equity compensation can fall short. To avoid a surprise, check whether enough was withheld after a vesting event, and plan for any shortfall through extra payments or by adjusting other withholding.

Should I sell my RSUs right away?

That depends on your goals. Since you already pay income tax on the value at vesting, selling immediately locks in that value and lets you diversify, avoiding too much wealth concentrated in one company’s stock. Holding aims for long-term capital gains treatment on future appreciation but carries the risk of the stock falling. There is no universal answer; weigh diversification, your risk tolerance, and tax considerations for your situation.

The Bottom Line

Restricted stock units are a promise of company shares that become yours when they vest, and they carry two distinct tax moments that are easy to confuse. At vesting, the fair market value of the shares is treated as ordinary income, added to your taxable pay for the year, and employers usually withhold taxes then, often by holding back some of the shares. Later, if you keep and then sell the shares, any change in value since vesting is a capital gain or loss, taxed at short-term or long-term rates depending on how long you held them after vesting. So vesting is ordinary income, and post-vesting appreciation is capital gains. The most common surprise is under-withholding at vesting, since the default amount may not cover your actual rate, especially if the income pushes you into a higher bracket, so it pays to check and plan for any shortfall. Whether to sell vested shares immediately to diversify or hold for potential long-term gains depends on your goals and risk tolerance, with no single right answer. Because RSU taxation can be significant and interacts with your overall income, it is a frequent reason to get professional advice. For related guides, see our articles on how to reduce capital gains tax, tax basics, and doing your own taxes or hiring a professional, and explore the full Taxes section. This article is general information about the US tax system, not personalized tax advice, and rules change, so consult current official guidance or a tax professional.