RSU vs PSU: What’s the Difference and Why It Matters

Stock compensation has a way of becoming a significant part of a senior executive’s net worth, sometimes by default. RSUs and PSUs are the two most common vehicles driving that accumulation — and while most professionals we work with understand the basics of how each works, the planning implications of one versus the other don’t always get the attention they deserve. 

The Core Difference

Restricted stock units (RSUs) are time-based. You receive them as part of a compensation agreement, and they vest on a set schedule, typically over three to four years, as long as you remain employed. A three-year vesting period might release one-third of the grant each year. The value at vesting is based on the stock’s fair market value on that date, and continued employment is the only condition. Check out our full guide for a deeper look at what RSUs are and how vesting works.

A performance stock unit (PSU) is a form of equity compensation where the number of shares you receive depends on whether the company meets specific performance targets. Those targets are agreed upon at the time of the grant and can be based on absolute company performance, performance relative to peers, or some combination. PSUs also vest over a set period, usually three years. At the end of the measurement period, the results determine how many shares you receive: it could be the full target amount, more if performance exceeded expectations, or fewer if targets were missed but still above a minimum threshold.

The practical difference is that RSUs are predictable while PSUs are variable. RSUs reward continued employment, whereas PSUs reward company performance, which may or may not reflect your individual contribution.

Who Typically Receives Each

This distinction matters because not everyone’s compensation package includes both. PSUs are most common at the C-suite level, where they’re often paired with RSUs in a roughly equal split as part of a long-term incentive plan. Shareholders want senior leaders to have a meaningful portion of their compensation tied to company outcomes, and PSUs serve that purpose directly.

At the director and vice president level, compensation packages more commonly include RSUs and possibly stock options, but not PSUs. If you’re in that position and your package does include PSUs, that’s worth paying attention to. It can signal how the company thinks about your role relative to its long-term performance.

The Risk and Reward Tradeoff

RSUs carry market risk, meaning the shares can be worth more or less at vesting depending on the stock price, but they don’t carry performance risk. You’ll receive them regardless of how the company performs against internal benchmarks.

PSUs carry both. The stock price matters, and so does whether the company meets its targets. That dual exposure can be meaningful in a strong year and disappointing in a weak one, even if your individual performance was excellent. Market conditions, competitive dynamics, and factors entirely outside your control can all play a role.

This is why the structure of PSU metrics is important. When PSUs are tied to two or three independent metrics rather than a single benchmark, the probability of achieving at least a partial payout increases. If your grant includes PSUs, understanding which metrics they’re tied to, and how realistic those targets are given current conditions, is worth a conversation with your advisor.

Taxes: What Most People Miss 

The tax treatment for RSUs and PSUs is similar in that, at vesting, the fair market value of the shares is taxed as ordinary income. If you hold the shares after vesting and they appreciate, any gain on a subsequent sale is taxed as a capital gain, either short-term if sold within a year of vesting, or long-term if held longer. (The IRS provides additional guidance on short and long-term capital gains.)

But the complication most professionals encounter is what I’d describe as the withholding gap. Most companies withhold at a flat supplemental rate when shares vest. But if your total income puts you in a higher bracket, the actual tax owed can be significantly higher. That gap may not surface until you file your taxes, and then you may find yourself scrambling to find the cash to cover it.

For instance, here’s a hypothetical scenario: let’s say $150,000 in RSUs vest in a single year and your employer withholds at 22% (the federal supplemental rate for 2026, subject to change), that’s $33,000 set aside for taxes. But if your combined income puts you in the 35% bracket, the actual federal liability on that vest is closer to $52,500, before state taxes. That $19,500 gap is yours to cover, and it can come as quite a surprise if you didn’t see it coming.

To prevent these unpleasant tax surprises, you can stay on the offensive by mapping vesting schedules at the start of each year, estimating total taxable income including all equity tranches, and working with your CPA on quarterly estimated payments to close the gap before tax time. 

For a detailed breakdown of how to plan for taxes, check out our RSU tax planning guide.*

Managing Concentration Risk

Whether you hold RSUs, PSUs, or both, one important factor remains the same: each vesting event increases your exposure to a single company’s stock creating what we call concentration risk. Because your salary and bonuses already come from your company,  if a significant portion of your investment portfolio also comes from your company stock, a market downturn could set you up for significant loss in portfolio value.

Working with executives, here’s a common issue I’ve seen: Each grant carries its own three-to-four year vesting schedule. The shares vest, and because there’s no immediate need for cash, the shares sit idle. Over time, company stock becomes 30% or more of the total portfolio without a deliberate decision to build that position, creating concentration risk that needs to be dealt with.

If your company stock exceeds 10% to 20% of your total investable portfolio, (including taxable and retirement accounts but excluding your home), it’s worth considering a sell strategy. When multiple grants vest in the same year, pushing your concentration higher and compressing your taxable income into a single filing period, that’s where the investment decision and the tax decision have to be made together rather than in isolation. Monument’s approach to stock-based compensation integrates the sell decision with your tax situation, portfolio allocation, and liquidity needs so the pieces work together. 

For the full framework on how we think through the sell-at-vest decision, the RSU complete guide walks through it in detail.

What to Do Next

If equity compensation is a meaningful part of your financial picture, the RSU vs PSU distinction is one piece of a larger planning question: how does this equity fit into your total wealth strategy, your tax plan, and your timeline?

The answer depends on what’s vesting, when, how concentrated you are, and what else is happening in your financial life that year. That’s the kind of coordination that benefits from a fee-only fiduciary who understands equity compensation and can connect the investment decision to the tax decision.

If you’d like to talk through how your equity compensation fits into your broader wealth plan, we offer a Complimentary Wealth Check to get started. Let’s talk.

*Monument is neither a law firm nor a certified public accounting firm and no portion of the blog content should be construed as legal or accounting advice. Please consult your CPA for tax advice.