Vested shares are company stock that you fully own because you’ve satisfied the conditions attached to the grant, almost always a required period of employment. Until those conditions are met, the shares are unvested, and the company can take them back if you leave. Once they vest, they’re yours to keep, sell, vote, and (if the company pays them) collect dividends on, regardless of whether you stay with the employer.
What Changes the Moment Shares Vest
Unvested equity is a conditional promise. The company has set the shares aside for you, but they come with strings: leave before the conditions are met and the shares go back. In most cases you can’t sell them, vote them, or collect dividends on them during the waiting period.
At vesting, those strings fall away. You own the shares outright, the company can’t reclaim them, and you pick up the ordinary rights of a shareholder. You can sell on the open market (subject to the trading rules discussed below), vote at shareholder meetings, and receive any dividends the company declares.
One nuance: restricted stock (actual shares transferred to you at grant, not RSUs) usually carries voting rights and dividends from day one, even before vesting, because you technically hold the shares the whole time. The company can still claw them back if you leave early. RSUs work differently and deliver no shareholder rights until the shares are actually delivered at vesting.
How You Get to Vested: Schedules and Cliffs
Vesting follows a schedule written into your grant agreement. The most common structure is time-based: stay employed for a defined period and your shares vest in stages.
The Four-Year Schedule With a One-Year Cliff
The default arrangement at many companies 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 the grant vests at once. The remaining 75% then vests in smaller pieces, often monthly or quarterly, across the next three years.
The cliff protects the company from handing out equity to someone who leaves almost immediately. For the employee, the day before the cliff and the day after can be worth a serious amount of money.
Performance-Based Vesting
Some grants vest only when a specific milestone is hit. A sales leader’s shares might vest when the company reaches a revenue target; an engineer’s might vest at a product launch. Performance conditions can stand alone or sit on top of a time requirement, so both have to be met.
Refresh Grants
Many employers issue additional equity to existing employees after the original grant is well into vesting, often around year two or three. These refresh grants start a new vesting schedule of their own, which keeps a meaningful amount of unvested equity on the table as earlier grants wind down.
What “Vested” Means for Each Type of Equity
Vesting mechanics look similar across equity vehicles, but what you actually own at vesting (and what you owe in tax) depends on the award.
Restricted Stock Units (RSUs)
RSUs are a promise to deliver shares in the future, contingent on vesting. You own no stock until the RSU vests and the shares are delivered to your brokerage account. At that point the fair market value of the delivered shares is treated as ordinary wage income. RSUs are the most common form of equity compensation at large public companies because the mechanics are straightforward: you pay nothing to receive them, and their value tracks the stock price directly.
Stock Options (ISOs and NSOs)
A stock option gives you the right to buy company stock at a fixed strike price set when the option is granted. Vesting unlocks the right to exercise; it does not hand you shares. If the market price rises above your strike price you can exercise and profit from the spread. If it never does, the option can expire worthless.
Incentive stock options (ISOs) receive preferential tax treatment: no regular income tax at exercise, though the spread can trigger alternative minimum tax, and the entire gain qualifies for long-term capital gains rates if you hold the shares at least two years from grant and one year from exercise.1Internal Revenue Service. Topic No. 427, Stock Options Non-qualified stock options (NSOs) are simpler and less favorable: the spread at exercise is taxed immediately as ordinary income. Only the first $100,000 of options (by strike price) that become exercisable in any calendar year qualifies for ISO treatment; anything above that is automatically treated as an NSO.
Restricted Stock
Restricted stock is not the same as RSUs. Actual shares are transferred to you at grant, with restrictions that lapse on a vesting schedule. You usually vote and receive dividends from day one, and the company can reclaim the shares if you leave before vesting. This is the award type eligible for the 83(b) election, which lets you choose to pay ordinary income tax on the (usually small) grant-date value within 30 days of the grant so that future appreciation is taxed as long-term capital gains.2Office of the Law Revision Counsel. 26 USC 83 – Property Transferred in Connection With Performance of Services3Internal Revenue Service. IRS Form 15620 – Section 83(b) Election The election is risky: if you leave before vesting and forfeit the shares, you don’t get the tax payment back, and the 30-day window is absolute. The election does not apply to RSUs, because no property transfers until vesting.
Taxes When Shares Vest
For the most common award, RSUs, vesting triggers a tax bill immediately and automatically. The fair market value of the delivered shares on the vesting date is treated as ordinary wage income, subject to federal income tax, Social Security (up to the annual wage base), and Medicare.2Office of the Law Revision Counsel. 26 USC 83 – Property Transferred in Connection With Performance of Services4Internal Revenue Service. Social Security and Medicare Withholding Rates5Social Security Administration. Contribution and Benefit Base An additional 0.9% Medicare tax applies once wages pass $200,000 for single filers, $250,000 for joint filers, or $125,000 for married filing separately; employers begin withholding it at $200,000 regardless of filing status, so what’s withheld may not match what you ultimately owe.6Internal Revenue Service. Topic No. 560, Additional Medicare Tax
The vesting income appears on your W-2. Most employers use a sell-to-cover approach, automatically selling enough of the newly vested shares to pay the taxes and depositing the rest in your brokerage account.
The Withholding Gap That Catches People Out
RSU income is treated as supplemental wages, which federal rules withhold at a flat 22% for amounts under $1 million and 37% above that.7Internal Revenue Service. Publication 15-A, Employers Supplemental Tax Guide If your total income puts you in the 32% or 35% bracket, 22% withholding falls well short of what you actually owe. On a large vesting event, the shortfall can be five figures, and it comes due at tax time.
You can close the gap by increasing withholding on your regular paycheck, making quarterly estimated payments, or asking the employer to withhold at a higher rate on RSU income if the plan allows. The IRS charges underpayment penalties if your combined withholding and estimated payments fall below safe harbor thresholds.8Internal Revenue Service. Instructions for Form 2210 – Underpayment of Estimated Tax by Individuals, Estates, and Trusts
Your Cost Basis and the Clock for Capital Gains
The vesting date sets your tax basis in the shares at their fair market value that day. When you later sell, you owe capital gains tax only on the appreciation above that basis. Hold the shares 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 ordinary income rates, which can be nearly double.9Internal Revenue Service. Topic No. 409, Capital Gains and Losses If the stock drops below the vesting-day price and you sell at a loss, the loss offsets other capital gains and up to $3,000 of ordinary income per year.
Selling Vested Shares
Owning vested shares does not always mean you can sell them whenever you want. Public company employees typically face two restrictions.
Most companies impose quarterly blackout periods that bar employees with access to material nonpublic information from trading in the weeks around earnings. These are internal policies rather than SEC rules, but violating them can lead to termination and potential insider trading liability.
Outside blackout windows, federal securities law still prohibits trading on material nonpublic information. If you know something the market doesn’t, you can’t buy or sell until that information is public. Many employees set up 10b5-1 plans that pre-schedule sales on specific dates or price triggers so the timing isn’t a judgment call.
What Happens to Vested Shares When You Leave
Vested shares are permanently yours. Unvested shares are forfeited the day you leave, whether you quit or are terminated, and the company reclaims them.
If your vested equity is already in the form of actual stock, settled RSUs or vested restricted stock, you simply keep the shares in your brokerage account. Nothing to do.
Vested Options Expire After You Leave
Vested stock options are different: they’re a right to buy, and that right expires. The standard post-termination exercise window is 90 days, though some companies offer longer periods of 180 days or several years.
For ISOs the 90-day window is not just company policy. Exercise more than three months after leaving employment and the option loses its ISO tax treatment, so the spread becomes ordinary income like an NSO. The window extends to one year if you leave due to disability.10Office of the Law Revision Counsel. 26 USC 422 – Incentive Stock Options
Exercising takes real money: you pay the strike price for every share and may owe tax on the spread. If you can’t fund that out of pocket, a cashless exercise (same-day sale) uses a short-term broker loan to buy and immediately sell the shares, using proceeds to repay the loan and cover tax. You keep the net profit but hold no shares afterward.
Some grant agreements separate “good leavers” (resignation, layoff, retirement) from “bad leavers” (termination for cause), and a bad leaver may forfeit even vested options. It’s worth checking which category applies before you count on anything.
Acceleration If the Company Is Acquired
When your employer is acquired, the fate of your unvested equity depends on acceleration provisions in your grant agreement. Single-trigger acceleration vests some or all of your unvested shares automatically on closing. Double-trigger acceleration requires two events: the acquisition itself plus an involuntary termination (or a constructive termination through a pay cut, forced relocation, or major role change) within a defined window after closing, often 9 to 18 months. Double-trigger is more common because it keeps a retention incentive in place for the acquirer while protecting you from being pushed out right after the deal. Without an acceleration clause, your unvested shares simply follow whatever the acquirer decides.
Private Company Shares: Vested Doesn’t Mean Liquid
Vesting works the same way at a private company, but liquidity does not. There’s no public market, and your grant agreement likely gives the company a right of first refusal over any shares you try to sell. In practice, private shares stay illiquid until the company goes public, is acquired, or runs a secondary sale that lets employees cash out to outside investors. Until one of those happens, vested shares have value on paper but no straightforward path to cash, which makes the exercise windows and acceleration terms in your grant agreement especially worth reading before you leave.