Performance Stock Units (PSUs)

What Are Performance Stock Units?

Performance stock units (PSUs) are a type of equity compensation that ties the number of shares you ultimately receive to the achievement of specific performance goals. Unlike standard RSUs that vest purely based on time (stay employed for four years and you receive all shares), PSUs vest only if both the time-based requirement and a performance condition are met. The performance condition might be company revenue, earnings per share, total shareholder return relative to a peer group, or any other measurable metric.

PSUs are most common at mid-to-late-stage private companies and public companies. They align employee incentives with company performance — if the company hits its targets, employees receive more shares. If it misses, employees receive fewer shares or none at all.

How PSUs Work

The Grant and Target Shares

When you receive a PSU grant, you are assigned a target number of shares. The actual number of shares you receive at vesting can range from 0% to 200% (or more) of the target, depending on performance results. For example, a grant of 10,000 target PSUs might pay out 5,000 shares at threshold performance, 10,000 at target, and 20,000 at maximum performance.

Performance Metrics

Common performance metrics include:

• Revenue growth: Company must achieve specified revenue milestones
• Earnings per share (EPS): Profitability targets
• Total shareholder return (TSR): Stock price appreciation plus dividends relative to a benchmark
• Strategic milestones: Product launches, customer acquisition targets, or market expansion goals

The performance period is typically one to three years, measured from the grant date.

Vesting and Settlement

PSUs typically have a dual vesting condition: you must remain employed through the performance period (time-based) and the performance condition must be met (performance-based). At the end of the performance period, the company's compensation committee certifies the level of achievement and determines the payout percentage. Shares are then delivered, and the tax event occurs at settlement.

Forfeiture

If you leave the company before the performance period ends, you typically forfeit all PSUs — regardless of how the performance metrics are tracking. If you remain employed but the company misses the minimum performance threshold, you also receive nothing.

Tax Treatment

At Settlement

PSUs are taxed as ordinary income when shares are delivered, identical to RSU taxation. The taxable amount is the fair market value of the shares on the delivery date multiplied by the number of shares received. Your employer withholds income and payroll taxes, often by withholding a portion of the shares (sell-to-cover).

No 83(b) Election Available

Because PSUs are a promise to deliver shares in the future (not actual shares), you cannot file an 83(b) election on PSUs. The taxable event occurs at delivery, not at grant.

Capital Gains After Settlement

Once you receive the shares, your cost basis is the FMV at settlement. If you hold the shares for more than one year after delivery, any additional appreciation qualifies for long-term capital gains treatment.

Practical Implications for Startup Employees

Valuing PSUs in a Job Offer

PSU grants are harder to value than standard RSUs because the payout depends on uncertain future performance. When evaluating a job offer with PSUs, consider the target value (the number of target shares times the current share price) as the baseline, but understand that actual payout could range from zero to double. Ask what the performance metrics are, how achievable management considers them, and what the historical payout rates have been for prior PSU grants.

Risk Profile

PSUs carry more risk than time-vested RSUs. You could stay for the full performance period and receive nothing if the company underperforms. This makes PSUs a less certain component of your total compensation. Factor this uncertainty into your financial planning — do not count on maximum payout.

Concentration Considerations

If you receive a large PSU payout, it creates an immediate concentration risk: a significant portion of your net worth is tied to a single stock, and the shares are taxed as ordinary income at delivery. Consider your diversification strategy before and after settlement.

How It Relates to Exercising Stock Options

PSUs do not involve an exercise decision — shares are delivered automatically upon meeting performance and time conditions. However, PSUs interact with your overall equity strategy. If you hold both stock options and PSUs, a large PSU payout in a given year increases your income and may push you into higher tax brackets. This can affect the optimal timing for exercising stock options. Coordinating PSU settlements with option exercises across tax years can reduce your overall tax burden.