Vested shares are company stock you fully own because you’ve satisfied the conditions attached to the grant, almost always a required period of employment. Once shares vest, the company can’t take them back. You can sell them, vote them, collect any dividends the company pays, and keep them if you change jobs. Until that moment, the shares are a conditional promise the company can reclaim.
What Changes the Moment Shares Vest
Unvested equity comes with strings. The company has set the shares aside for you, but if you leave before the conditions are met, they go back. You generally can’t sell them, vote them, or collect dividends on them during the waiting period.
Vesting cuts the strings. The shares are yours outright, the company loses any right to reclaim them, and you gain the rights that come with ownership. Whether you stay or leave after that point, vested shares stay with you.
One nuance is worth flagging. Restricted stock (actual shares transferred to you at grant, not RSUs) usually carries voting rights and dividend payments even before vesting, because you technically hold the shares from day one. The company can still claw them back if you leave early, but you’re on the shareholder register in the meantime. RSUs deliver nothing until vesting, so no shareholder rights exist during the wait.
How Shares Actually Become Vested
Vesting follows a schedule spelled out in your grant agreement. The most common form is time-based: stay employed for a set period, and shares vest in stages.
The Four-Year Schedule With a One-Year Cliff
The widely used arrangement is four years of vesting with a one-year cliff. Nothing vests during your first year. Leave on day 364 and you walk away with zero shares. Hit the one-year mark and 25% of your grant vests at once. The remaining 75% then vests in smaller increments, often monthly or quarterly, across the next three years.
The cliff protects the company from handing equity to someone who leaves almost immediately. For the employee, it’s the highest-stakes date on the calendar: one day on either side can be worth tens of thousands of dollars.
Performance-Based Vesting
Some grants tie vesting to hitting milestones instead of, or on top of, staying employed. A sales leader’s equity might vest when the company reaches a revenue target. An engineer’s shares might vest when a product launches. Performance vesting can stand alone or layer onto a time-based schedule, in which case both requirements have to be met before shares vest.
What You Can Do With Vested Shares
Once shares vest, you have real ownership. You can hold them, sell them (subject to any trading restrictions covered further down), vote them at shareholder meetings, and receive dividends if the company pays any. If you leave the company, vested shares stay in your brokerage account. No action is required.
The type of equity you were granted determines what “vested” actually looks like in your account. RSUs deliver shares to you on the vesting date. Restricted stock, which you already held, simply loses its restrictions. Stock options are the exception, and they need their own section below because “vested” doesn’t mean you own shares yet.
Taxes Owed When Shares Vest
Vesting triggers a tax bill, and the size of it catches people off guard. For RSUs, the most common form of equity compensation at large public companies, the tax hit is immediate and automatic.
RSU Income at Vesting
When RSUs vest, the fair market value of the delivered shares on the vesting date is treated as ordinary income, the same as your salary.1Office of the Law Revision Counsel. 26 USC 83 – Property Transferred in Connection With Performance of Services2Internal Revenue Service. Social Security and Medicare Withholding Rates3Social Security Administration. Contribution and Benefit Base If your total wages for the year already exceed the Social Security wage base, that portion won’t apply to the RSU income, but Medicare has no cap.
An additional 0.9% Medicare tax kicks in once your wages pass certain thresholds: $200,000 for single filers, $250,000 for married filing jointly, and $125,000 for married filing separately. Your employer begins withholding it at $200,000 regardless of filing status, so the actual liability on your return may differ from what was withheld.4Internal Revenue Service. Topic No. 560, Additional Medicare Tax
The vesting income shows up on your W-2 for the year the shares are delivered. Most companies use sell-to-cover: they automatically sell enough newly vested shares to pay the taxes owed and deliver the rest to your brokerage account.
The Withholding Gap
Here is where people get burned. Federal law treats RSU income as supplemental wages, withheld at a flat 22% on amounts under $1 million and 37% above that.5Internal Revenue Service. Publication 15-A, Employers Supplemental Tax Guide If your vesting pushes total income into the 32% or 35% bracket, 22% withholding falls well short. The rest comes due at tax time, and on a large vesting event the shortfall can be five figures.
You can close the gap by increasing withholding on your regular paycheck, making quarterly estimated tax payments, or asking your employer to withhold at a higher rate on RSU income if the plan allows it. The IRS charges penalties for underpayment of estimated taxes if your total payments fall below the safe harbor thresholds.6Internal Revenue Service. Instructions for Form 2210 – Underpayment of Estimated Tax by Individuals, Estates, and Trusts
The safe harbor lets you avoid penalties if your total tax payments equal at least 90% of your current-year liability or 100% of last year’s tax (110% if your prior-year adjusted gross income exceeded $150,000). When a large vesting event creates lumpy income, the annualized income installment method on Schedule AI of Form 2210 can help by calculating required payments based on when the income was actually received rather than spreading it evenly across the year.6Internal Revenue Service. Instructions for Form 2210 – Underpayment of Estimated Tax by Individuals, Estates, and Trusts
Restricted Stock at Vesting
Restricted stock (actual shares held with restrictions that lapse on the vesting schedule) is taxed the same way at vesting by default: the fair market value on the day restrictions lapse is ordinary income. The main alternative is filing an 83(b) election within 30 days of the original grant to pay tax on the grant-date value instead, but that decision has to be made at grant, not at vesting.1Office of the Law Revision Counsel. 26 USC 83 – Property Transferred in Connection With Performance of Services
Selling Vested Shares
The vesting date establishes your tax basis: the fair market value of the shares on the day they vested. When you eventually sell, you owe capital gains tax only on the appreciation above that basis. Hold for more than one year after vesting and the gain qualifies for long-term capital gains rates, which top out at 20%. Sell within a year and the gain is taxed at your ordinary income rate, which can be nearly double.7Internal Revenue Service. Topic No. 409, Capital Gains and Losses
If the stock drops below your vesting-day price and you sell at a loss, that loss is deductible against other capital gains and up to $3,000 of ordinary income per year. One trap catches RSU holders who don’t see it coming.
The Wash Sale Trap
The wash sale rule disallows a capital loss if you acquire substantially identical stock within 30 days before or after the sale.8Internal Revenue Service. Revenue Ruling 2008-5 – Section 1091, Loss From Wash Sales of Stock or Securities An RSU vesting counts as an acquisition. Sell company shares at a loss and a new batch of RSUs vests inside that 61-day window, and the IRS disallows your loss. The disallowed amount gets added to the cost basis of the newly vested shares, so it isn’t lost forever, but you don’t get the deduction that year. If you’re selling shares near a vesting date, check the calendar first.
Vested Stock Options Are a Special Case
Vested options aren’t the same as vested shares. An option gives you the right to buy stock at a locked-in strike price set at the time of the grant. Vesting means you can now exercise that right, but you still have to spend money to turn the option into shares, and the option can expire.
Options come in two forms with very different tax treatment. Incentive stock options (ISOs) receive preferential treatment: no regular income tax at exercise, though the spread can trigger alternative minimum tax. Hold the shares for at least two years after the grant date and one year after exercise, and the entire gain qualifies for long-term capital gains rates.9Internal Revenue Service. Topic No. 427, Stock Options Non-qualified stock options (NSOs) are simpler and less favorable: the spread at exercise is taxed as ordinary income, like wages. ISOs also carry a cap, with only the first $100,000 worth (measured by strike price) that become exercisable in any calendar year qualifying for ISO treatment. Anything above that is taxed as an NSO.
After you leave, vested options have a limited life. The standard post-termination exercise window is 90 days. Some companies allow longer, but three months is the baseline. For ISOs, the 90-day window is statutory: exercise more than three months after leaving employment and the option loses its tax-advantaged status and is taxed as an NSO. If you’re disabled, the window extends to one year.10Office of the Law Revision Counsel. 26 USC 422 – Incentive Stock Options
Exercising costs money. You pay the strike price for every share and owe taxes on any spread. A cashless exercise (also called a same-day sale) uses a short-term broker loan to buy and immediately sell the shares, with proceeds paying back the loan and covering taxes. The trade-off is you end up holding none of the stock.
Some grant agreements also distinguish between “good leavers” (retirement, layoff, resignation) and “bad leavers” (termination for cause). A bad leaver may forfeit even vested options entirely, so it’s worth knowing which category applies.
Restrictions That Survive Vesting
Owning vested shares doesn’t always mean you can sell them right away. Public company employees face two common restrictions.
Most companies impose quarterly blackout periods barring employees (particularly those with access to material nonpublic information) from trading in the weeks before earnings releases. These are internal company policies, not federal law, but violating a trading policy can result in termination and potential insider trading liability.
Even outside blackout windows, federal securities law prohibits trading on material nonpublic information. If you know something the market doesn’t (an upcoming acquisition, a product failure, a major contract), you can’t buy or sell until the information becomes public. Many employees set up 10b5-1 trading plans that pre-schedule share sales to avoid these timing issues.
Private Company Vested Shares
If your equity is in a private company, vesting works the same way but liquidity is different. There’s no public market for your shares, and your grant agreement likely includes a right of first refusal that gives the company the option to buy back any shares you try to sell.
Private company equity stays illiquid until one of three things happens: the company goes public, the company is acquired, or the company organizes a secondary sale where employees can sell shares to outside investors. Until then, your vested shares have value on paper but no easy path to cash. That is why the exercise and departure terms in your grant agreement matter so much at a private company: if you leave, you may find yourself exercising options for stock you can’t sell for years.