Getting a job offer that includes restricted stock units, or RSUs, can be exciting. But the first time a portion of those shares actually vests, the experience can be a little confusing. You may see shares appear in your brokerage account, notice that some shares were withheld for taxes, and wonder why the number of shares you received is smaller than the number listed in your compensation package.

The good news is that the basic idea is fairly straightforward once you separate the process into a few steps. An RSU is generally a promise from an employer to deliver company shares, or their cash equivalent in some plans, once specified vesting conditions are satisfied. Before the shares vest, you typically don’t own the underlying stock simply because the RSUs were granted to you.

Once an award vests, however, the situation changes. The vested amount can become taxable compensation, shares may be delivered after withholding, and the shares you actually receive can then become part of your investment portfolio.

1. What Exactly Is an RSU?

Restricted stock units are a form of equity compensation commonly offered by companies, particularly publicly traded technology and growth businesses. Instead of giving you unrestricted shares immediately, the employer grants you units that become available according to a vesting schedule.

For example, suppose your employment package includes 400 RSUs that vest over four years. The exact schedule depends on your employer’s plan, but you might receive a portion each year or at regular intervals after an initial vesting period.

The important distinction is between the grant date and the vesting date. A grant tells you what you have been awarded under the plan. Vesting is when the applicable conditions have been met for a portion of that award.

Your actual rights can depend on the company’s equity plan, your employment agreement, and whether you remain employed through the relevant vesting dates. That’s why the plan documents are worth reading rather than relying solely on the number shown in your offer letter.

2. What Happens When Your RSUs Vest?

This is the part that often surprises new RSU recipients. Suppose 100 RSUs vest when the company’s stock is trading at $50 per share. The gross value associated with that vesting event would be approximately:

In a taxable arrangement, that $5,000 may be treated as compensation income under the applicable tax rules. Your employer or plan administrator may withhold taxes at the time of vesting.

That means you may not actually see 100 shares deposited into your brokerage account. For example, if 25 shares are withheld for taxes, you might receive 75 shares. The exact amount withheld depends on the applicable rules, your employer’s withholding method, and other factors.

The withheld shares are generally not an additional tax or penalty. They are typically part of the mechanism used to satisfy withholding obligations associated with the compensation event.

3. Why Did Some of My RSU Shares Disappear?

One of the most common questions after an RSU vest is: “I was supposed to receive 100 shares. Why did I only get 70 or 75?”

In many plans, the difference represents shares withheld or sold to cover tax obligations. This is sometimes described as net share settlement or sell-to-cover, depending on how the plan is structured.

The terminology and mechanics can vary, so your brokerage statement and employer’s equity portal are the best places to confirm exactly what happened.

• Gross shares: The number of RSUs that vested.
• Tax withholding: The amount withheld or sold to satisfy applicable withholding requirements.
• Net shares: The shares remaining after the withholding transaction.
• Net value: The market value of the shares you actually retain, which can change after vesting.

It is worth checking the transaction history rather than assuming that the difference represents a brokerage fee or investment loss.

4. What Is the Tax Basis of Your RSU Shares?

After your RSUs vest, it is important to keep track of the tax basis associated with the shares you retain. This becomes particularly relevant if you later sell them.

In the United States, for many ordinary RSU arrangements, the amount included in compensation at vesting generally becomes an important part of the basis calculation for the shares received. The exact reporting can depend on the plan and transaction, so your tax documents should be checked carefully.

This distinction matters because the value of the shares can change after vesting.

In other words, it can be useful to think about the RSU transaction as having two stages: the compensation event when the shares vest and the investment result after you own the shares.

5. Should You Sell Your RSU Shares Immediately?

There is no universal answer to this question. Once your shares have vested, you are generally deciding whether to continue holding an investment in your employer’s stock or move some of that value into other assets.

One useful question is:

This reframes the decision. Your salary may already depend on your employer, and your future career may also be connected to the company’s performance. Holding a large amount of company stock can therefore create concentration risk.

On the other hand, selling shares can have tax consequences and may conflict with your personal investment strategy or applicable trading restrictions. Employees at some companies may also be subject to blackout periods or insider-trading policies.

Rather than treating selling immediately or holding indefinitely as universal rules, consider your overall financial situation, diversification, taxes, liquidity needs, and risk tolerance.

6. A Simple Way to Think About RSUs and Diversification

RSUs can become a surprisingly large part of an employee’s net worth, particularly when a company’s share price rises or additional grants are made over several years.

The challenge is that your employment income and investment portfolio can become connected to the same company.

Imagine someone earns their salary from Company A and also holds $150,000 of Company A stock. If the company experiences financial difficulties, the person could potentially face pressure from both sides: their employment situation and the value of their investment could be affected at the same time.

Diversification cannot eliminate investment risk, but spreading assets across different investments may reduce dependence on the performance of a single company or asset.

The appropriate level of diversification is personal. It can depend on your other investments, emergency savings, income stability, upcoming expenses, and willingness to accept market fluctuations.

7. Four Things to Check After Every RSU Vest

You don’t need a complicated financial system to keep your RSUs organized. A simple checklist can prevent many avoidable surprises.

8. Common RSU Mistakes to Watch For

RSUs can look simple on the surface, but a few common misunderstandings can make them harder to manage.

• Thinking the grant value is guaranteed income.
  The value of unvested RSUs can change with the company’s stock price, and vesting conditions may apply.
• Ignoring withholding.
  The number of shares delivered may be lower than the number that vested because of tax withholding.
• Forgetting about concentration risk.
  A rising stock price can quietly make one company’s shares a large percentage of your portfolio.
• Not keeping records.
  Vesting statements and tax documents can become important when you later sell shares.
• Assuming every RSU plan works the same way.
  Employer plans, jurisdictions, withholding methods, and tax rules can differ.

A Practical RSU Checklist

If you’re receiving RSUs for the first time, you can keep the process relatively simple. Start with the documents you already have and build your records from there.

Final Thoughts

RSUs can be a valuable part of an employee compensation package, but their value becomes easier to manage when you understand what happens at each stage. The grant is only the beginning. Vesting can create a compensation event, withholding can reduce the number of shares delivered, and any shares you keep can become an investment that changes in value over time.

The most useful habit is to separate the questions. First, understand what you received and what was withheld. Next, keep accurate records for tax reporting. Finally, look at the shares as part of your broader financial picture rather than treating them as automatically different from any other investment.

There is no single RSU strategy that works for everyone. Your decision may depend on your income, financial goals, tax situation, investment diversification, and comfort with risk. A clear understanding of the mechanics gives you a much better starting point for making those decisions.