PSU stock is shorthand for a Performance Share Unit, a form of equity compensation that promises you shares of company stock at a future date, but only if the company hits specific financial or market targets during a multi-year performance period. Unlike a straight stock grant or a time-based restricted stock unit, the number of shares you actually receive can range from zero to well above the original target, depending on how the company performs. That variability is the defining feature, and the reason employers use PSUs to tie senior pay to shareholder outcomes.
How a PSU Grant Works
When your employer grants you PSUs, the award agreement spells out three numbers that matter: a target, a minimum (often called the threshold), and a maximum. The target is the number of shares you’ll receive if the company meets its performance goals exactly at 100%. If performance falls below the threshold, the payout drops to zero. If performance exceeds expectations, the payout can climb to a cap that typically sits between 150% and 200% of target.
At the time of the grant, you own nothing. You have a conditional promise. The PSU has no tradable value and can’t be sold or transferred. It only converts into real shares after two things happen: you stay employed through the entire performance period, and the company certifies that performance goals were met. That dual requirement is what separates PSUs from simpler equity awards.
What Triggers a Payout
Companies pick performance metrics that reflect the goals they want executives focused on. Internal financial metrics are common: earnings per share, return on equity, free cash flow, or revenue growth. These measure whether management is running the business well on its own terms.
Market-based metrics add an external benchmark. The most popular is relative total shareholder return, which compares your company’s stock price growth plus dividends against a peer group or index. Relative TSR prevents executives from getting windfall payouts during a broad market rally where every stock rises. You only get credit for outperforming direct competitors.
The standard performance cycle runs three years, which most institutional investors consider the ideal length for encouraging long-term strategic thinking rather than quarter-to-quarter management.1Pearl Meyer. Knowing When and How to Adopt Performance Share Units At the end of the cycle, the board’s compensation committee reviews the results and certifies a payout percentage. If the company hit 120% of target, you receive 120% of your target units. If performance landed at 80% of target but above the threshold floor, you receive 80%.
PSUs almost always use cliff vesting. The entire award settles at once after the performance period ends and results are certified. There’s no gradual payout over time. Walking away before the cliff date means forfeiting everything, regardless of how strong the company’s performance has been.
Taxes When Your PSUs Vest
Grant day is a non-event for tax purposes. You haven’t received property, and the award is subject to a substantial risk of forfeiture, so the IRS doesn’t tax it.2Internal Revenue Service. Equity (Stock) – Based Compensation Audit Technique Guide
The taxable event arrives when the shares actually land in your brokerage account after the performance period ends and results are certified. At that moment, the full fair market value of every share delivered counts as ordinary income, no different from a cash bonus. Your employer reports this amount in Box 1 of your W-2 for the year of settlement.
This income is subject to federal and state income tax withholding, plus FICA taxes. For Social Security, the 6.2% tax applies to earnings up to the wage base of $184,500 in 2026.3Social Security Administration. Contribution and Benefit Base Most PSU recipients are already past that threshold from salary alone, so the Social Security portion may not apply to the PSU income. The 1.45% Medicare tax has no cap, and high earners face an additional 0.9% Medicare surtax on wages exceeding $200,000 for single filers or $250,000 for married couples filing jointly.4Internal Revenue Service. Topic no. 560, Additional Medicare Tax
One detail trips people up: you cannot make a Section 83(b) election on PSUs. That election, which lets you pay tax early on restricted stock before it appreciates, requires that actual property be transferred to you. PSUs are a contractual promise, not transferred property, so there’s nothing to elect on.5Office of the Law Revision Counsel. 26 U.S. Code 83 – Property Transferred in Connection With Performance of Services
Sell-to-Cover and the Withholding Gap
Your employer is required to withhold taxes on the ordinary income from vesting. The most common method is sell-to-cover: the company automatically sells enough of your newly vested shares to cover the required tax withholding, then deposits the remaining shares into your brokerage account. You don’t need to come up with cash.
The catch is that statutory minimum withholding rates often fall short of your actual tax liability on a large PSU payout. Many companies withhold at the federal supplemental wage rate of 22% for amounts up to $1 million and 37% for amounts above that. If your marginal rate is higher than the withholding rate, you’ll owe the difference when you file. Planning ahead with estimated tax payments can prevent a surprise in April.
Taxes When You Sell the Shares
Your cost basis in the delivered shares is the fair market value on the settlement date, which is the same amount that was taxed as ordinary income. Anything you gain or lose above that basis when you eventually sell is a capital gain or loss.
Say you receive 1,000 shares at a stock price of $50. You recognize $50,000 in ordinary income, and your cost basis is $50,000. If you later sell those shares for $60,000, you have a $10,000 capital gain. If you sell for $45,000, you have a $5,000 capital loss.
The holding period starts on the settlement date. Sell within one year and any gain is short-term, taxed at your ordinary income rate. Hold for more than one year and the gain qualifies as long-term, taxed at 0%, 15%, or 20% depending on your total taxable income.6Internal Revenue Service. Topic no. 409, Capital Gains and Losses For single filers in 2026, the 20% rate kicks in above $545,500 of taxable income.
High earners should also factor in the 3.8% net investment income tax, which applies to capital gains when your modified adjusted gross income exceeds $200,000 for single filers or $250,000 for joint filers. Those thresholds are not indexed for inflation, so they catch more people every year.7Internal Revenue Service. Topic no. 559, Net Investment Income Tax Combined with the 20% long-term rate, top earners effectively pay 23.8% on long-term gains from PSU shares.
What Happens If You Leave Before Vesting
The general rule is blunt: leave before the performance period ends and you forfeit your unvested PSUs. Voluntary resignation, termination for cause, and layoffs before the cliff date all typically result in a complete loss of the award. This is the retention lever that makes PSUs effective from the company’s perspective.
Exceptions exist for certain involuntary events, but they vary significantly by company. Many plans provide for pro-rata vesting when an employee dies or becomes permanently disabled during the performance period. Retirement treatment is more inconsistent. Some companies allow retirement-eligible employees to receive a prorated portion of their PSUs after the performance period concludes, based on the fraction of the cycle they completed before leaving. Others require a minimum period of employment after the grant date, often six months, before any retirement provisions apply.8U.S. Securities and Exchange Commission. Cognizant Technology Solutions Corporation Retirement, Death and Disability Policy
Your specific treatment is governed entirely by the language in your award agreement and the company’s equity plan document. If you’re considering leaving, those documents are worth reading carefully, ideally before you give notice.
What Happens in a Merger or Acquisition
A corporate acquisition during your PSU performance period raises an immediate question: what happens to the unvested award? The answer depends on whether your plan uses single-trigger or double-trigger acceleration.
Double-trigger acceleration is the dominant approach. Roughly 87% of large public companies require two events before PSUs accelerate: the closing of the deal and your subsequent involuntary termination (or resignation for good reason, such as a pay cut or forced relocation) within a specified window, usually 9 to 18 months after closing. Double-trigger protects the buyer from having to cash out every executive on day one while still protecting you if the new owners eliminate your role.
Single-trigger acceleration vests your PSUs automatically upon the deal closing, regardless of whether you keep your job. This approach has fallen out of favor with institutional investors and proxy advisory firms because it can create windfall payouts without any employment disruption.
When PSUs accelerate in a deal, the open question is what performance level to assume for an unfinished cycle. The most common approach, used by about a third of companies, is to vest the award at target (100%). Others use actual performance through the most recent measurement date. Your plan document specifies which method applies.
Clawbacks After a Financial Restatement
If the company later restates its financial results, federal securities rules may force it to claw back your PSU payout. SEC Rule 10D-1, adopted under the Dodd-Frank Act, requires every public company listed on a national exchange to maintain a written compensation recovery policy.9eCFR. 17 CFR 240.10D-1 – Listing Standards Relating to Recovery of Erroneously Awarded Compensation
The rule reaches all incentive-based compensation received by executive officers during the three fiscal years preceding the restatement. The amount subject to recovery is the excess over what would have been paid using the restated numbers. The clawback is mandatory regardless of whether anyone committed fraud or even made a mistake. A routine accounting correction that changes the numbers your PSU payout was based on is enough to trigger it. The company is also prohibited from indemnifying you against the loss.9eCFR. 17 CFR 240.10D-1 – Listing Standards Relating to Recovery of Erroneously Awarded Compensation
How PSUs Compare to RSUs and Stock Options
Where PSUs sit relative to other equity awards helps in evaluating an offer. The three most common forms of equity compensation at public companies are PSUs, restricted stock units, and stock options, and they differ in risk, reward, and mechanics.
PSUs vs. RSUs
RSUs require only continued employment to vest. Show up, stay employed through the vesting schedule, and you receive one share per unit. The payout is predictable. PSUs add the performance hurdle on top of the service requirement, so payouts range from zero to double the target. That makes PSUs higher risk but potentially higher reward. RSUs also tend to use graded vesting over three or four years, while PSUs almost always cliff vest at the end of the performance cycle.
Tax treatment is identical. Both create ordinary income equal to the fair market value of shares on the settlement date, reported on your W-2, and subject to the same FICA and withholding rules.
PSUs vs. Stock Options
Stock options give you the right to buy shares at a fixed exercise price. If the stock price rises above that price, the spread is your gain. If the stock stays flat or drops, the option is worthless. PSUs, by contrast, deliver shares outright at vesting, so they retain value even in a flat or declining market as long as the performance conditions are met. Even if the stock price has fallen since your grant date, the shares delivered still have real value.
Non-qualified stock options create ordinary income at exercise equal to the spread between the market price and the exercise price. Incentive stock options offer a more favorable path, potentially taxing the entire gain at long-term capital gains rates if you hold the shares for at least two years from the grant date and one year from the exercise date. That favorable treatment carries a catch: the spread at exercise is an adjustment for the alternative minimum tax, which can generate a substantial tax bill in the exercise year even though you haven’t sold anything.
For most senior employees at large companies, the package includes a mix of all three award types, weighted toward PSUs and RSUs. The PSU component is the piece most directly tied to whether management is actually delivering results for shareholders.