When your equity compensation paperwork says shares are vested versus released, it is describing two different moments. Vesting is the day you earn a non-forfeitable legal right to the shares. Release, sometimes called settlement, is the day those shares actually appear in your brokerage account and become sellable. For standard Restricted Stock Units, both events happen on the same date, which is why most employees treat the terms as interchangeable. They are not. The difference between shares vested vs released controls when you owe tax, how much your employer withholds, what cost basis follows the shares forward, and whether a mistake on your return can cost you twice.
When Vesting and Release Happen on Different Days
For most RSU grants, your employer processes the vest, withholds taxes, and deposits the net shares into your brokerage account on the same day. The two events collapse into one, and nothing turns on the distinction.
The gap opens up in two situations. The first is a deferral program: some companies let you vest in RSUs on one date but postpone delivery until a later date, such as retirement or a specified future year. In that case, the tax recognition event follows the release, not the vesting date. Under federal tax law, income from property received for services is recognized when the property is no longer subject to a substantial risk of forfeiture and is transferable to you.1Office of the Law Revision Counsel. 26 USC 83 – Property Transferred in Connection With Performance of Services If a deferral means you cannot actually access the shares, the release date controls.
The second situation is Restricted Stock, which is different from RSUs. With Restricted Stock you receive actual shares on your grant date, but they sit in your account subject to forfeiture if you leave before vesting. When the vesting date arrives and the forfeiture risk drops away, that is your tax recognition event, unless you filed a Section 83(b) election within 30 days of the grant to accelerate the tax to grant date.2Office of the Law Revision Counsel. 26 USC 83 – Property Transferred in Connection With Performance of Services – Section (b) That election is not available for standard RSUs, because at grant an RSU is only a promise of future delivery, not property you own.
A boundary worth naming: standard RSUs that vest and settle on the same date do not implicate Section 409A, the code section governing nonqualified deferred compensation. The rigid distribution rules and 20% penalty tax under 409A apply only when your company offers, and you elect, delayed settlement beyond the normal vesting date.3Office of the Law Revision Counsel. 26 USC 409A – Inclusion in Gross Income of Deferred Compensation Under Nonqualified Deferred Compensation Plans
When You Owe Tax
The award type determines exactly when the IRS treats the income as taxable, and each type ties to a specific point in the vesting-and-release sequence.
Restricted Stock Units
For RSUs, the taxable event is vesting and release, which for most plans is a single date. The income equals the number of shares released multiplied by the stock’s fair market value on that date. That amount is ordinary compensation income, subject to federal income tax, state income tax, Social Security, and Medicare. Nothing is taxed at grant.1Office of the Law Revision Counsel. 26 USC 83 – Property Transferred in Connection With Performance of Services
Non-Qualified Stock Options
NQSOs are taxed when you exercise, not when they are granted or when they vest. The taxable amount is the spread between the fair market value on the exercise date and the exercise price you paid. If your strike is $20 and the stock is worth $50 when you exercise, you recognize $30 per share of ordinary income.4Internal Revenue Service. Topic No. 427, Stock Options
Incentive Stock Options
ISOs get preferential treatment. You do not owe ordinary income tax at exercise if you hold the shares more than one year after exercise and more than two years after grant.5Office of the Law Revision Counsel. 26 USC 422 – Incentive Stock Options Meet both, and the entire gain when you sell is long-term capital gain. The catch is the Alternative Minimum Tax: the spread at exercise counts as an AMT adjustment in the exercise year, which can create a real tax bill even though you have not sold anything. Sell before both holding periods run and the exercise gets reclassified as ordinary income, wiping out the ISO advantage.4Internal Revenue Service. Topic No. 427, Stock Options
Restricted Stock and the 83(b) Election
If you receive actual Restricted Stock, filing a Section 83(b) election within 30 days lets you pay ordinary income tax on the grant-date value instead of waiting for vesting. Later appreciation is then taxed as capital gain when you sell. The deadline is strict, with no extensions; the IRS provides Form 15620 for the filing.6Internal Revenue Service. Instructions for Form 15620, Section 83(b) Election The risk is that if the stock drops or you leave before vesting, you cannot recover the tax you already paid on the reported income.2Office of the Law Revision Counsel. 26 USC 83 – Property Transferred in Connection With Performance of Services – Section (b)
What Gets Withheld at Release
When RSUs release, or when you exercise NQSOs, your employer must withhold federal income tax, state income tax, Social Security, and Medicare on the compensation income, the same way it would on a paycheck. Plans typically collect that withholding by selling a portion of the vesting shares on the market (sell-to-cover), holding back a portion of the shares and never delivering them (net share withholding), or accepting cash from you so you can keep the full share count.
The federal piece is treated as supplemental wages. The flat supplemental withholding rate is 22% on amounts under $1 million in a calendar year and 37% on amounts above that. That flat rate is a withholding estimate, not your actual tax rate. If your marginal rate is higher than 22%, you will likely owe more at filing time; if the 37% rate kicked in, you may see a refund. Social Security withholding stops once your total wages for the year hit the wage base limit ($184,500 for 2026).7Social Security Administration. Contribution and Benefit Base Medicare (1.45%) has no cap, and an Additional Medicare Tax of 0.9% applies once your wages exceed $200,000, which your employer must withhold regardless of filing status.8Internal Revenue Service. Topic No. 560, Additional Medicare Tax
Your Cost Basis Starts at the Release Value
The full fair market value of the released shares shows up on your Form W-2 in Box 1, combined with your regular salary. Some employers also break out the equity income in Box 14 for reference, but that figure is informational and already included in Box 1.9Fidelity Investments. Filing Taxes for Your Restricted Stock, Restricted Stock Units, or Performance Awards
Here is where the most expensive mistake in equity compensation happens. When you later sell shares, your brokerage issues a Form 1099-B reporting the sale proceeds and cost basis. Brokers are often required to report a cost basis of $0, or only what you personally paid out of pocket (which for RSUs is nothing), rather than the fair market value you already reported as W-2 income. If that unadjusted 1099-B basis flows onto your return, the IRS sees a gain equal to the entire sale price, and you pay ordinary income tax on that value once through your W-2 and again as a capital gain. You end up taxed twice on the same money.
The fix is Form 8949, which has a column specifically for correcting basis reported by brokers. Your cost basis for the released shares is the fair market value on the release date, matching what your W-2 already recognized as income.10Internal Revenue Service. Instructions for Form 8949 Most brokers include the correct adjusted basis in supplemental information sent alongside the 1099-B even when they cannot report it in the official box. If you already filed returns with the wrong basis, you can amend the prior three years using Form 1040-X to recover the overpayment.
Your Holding Period Starts at Release
Once shares are in your account and withholding is finished, the compensation phase is over. You are now an investor holding stock, and future price movement produces capital gain or loss measured from that release-date basis.
The holding period clock starts the day after release, not on the grant date and not on the date vesting was originally scheduled. Sell within one year of release and any gain is short-term, taxed at ordinary rates. Hold longer than a year after release and the gain qualifies for long-term capital gains rates.11Internal Revenue Service. Topic No. 409, Capital Gains and Losses When your grant vests in multiple tranches over several years, each tranche has its own release date and its own holding-period clock. Tracking them separately matters at sale time.
If the stock drops below its release-date value, selling produces a capital loss. Capital losses offset capital gains dollar for dollar, and any remaining net loss can offset up to $3,000 of ordinary income per year, with the excess carried forward.
If You Leave Before Vesting
Unvested equity is not yours. Resign, get laid off, or get terminated before the vesting date and unvested RSUs and stock options almost always disappear from your account. Only shares that already vested survive your departure.
For vested stock options, most plans give you a short window after termination to exercise, typically around three months. Miss that window and even fully vested options expire permanently, which catches people off guard when exercising requires significant cash or triggers a large tax bill. Check your equity agreement for the exact post-termination exercise period before giving notice.
Some plans include acceleration clauses that vest a portion of unvested shares under specific circumstances. The most common is a change-of-control trigger tied to an acquisition, sometimes structured as double-trigger acceleration where both the acquisition and your termination must occur. Terms vary widely, so the plan document controls.
Watch for Wash Sales Around Vesting Dates
Because release delivers shares into your account automatically, employees on a vesting schedule can trip the wash sale rule without meaning to. If you sell company stock at a loss and acquire substantially identical stock within 30 days before or after the sale, the IRS disallows the loss deduction.12Office of the Law Revision Counsel. 26 USC 1091 – Loss From Wash Sales of Stock or Securities
An RSU release counts as acquiring substantially identical stock, even though you did not choose to buy anything. Sell shares at a loss to harvest the tax benefit, then have another tranche release two weeks later, and the loss gets disallowed. The disallowed amount is added to the basis of the newly released shares rather than lost permanently, but the immediate tax benefit is gone. Before selling company stock at a loss, check the vesting schedule and confirm no release falls within 30 days on either side of the planned sale. Quarterly vesting schedules leave especially narrow windows.