If you have ever looked at a vesting schedule and thought, “Great, but what does this mean for my taxes?” This blog is for you. If you understand what happens at vesting, how withholding really works, and what triggers additional taxes later, you can move from reacting to planning. That means fewer surprises, more control, and a cleaner strategy for using RSUs to support real life goals.
If you’re new to RSUs, start with our 101 blog and come back here when you’re ready to go deeper.
How RSUs are Taxed
When you’re hired, your offer might look something like:
- Base salary
- Bonus or incentive target(s)
- An RSU grant (known as equity compensation)
Your offer letter may say:
“You are granted 1,200 Restricted Stock Units (RSUs).”
Then, a separate RSU grant or award notice outlines the details of that grant, including:
- Grant date
- Number of RSUs granted
- Vest commencement date
- Vesting schedule
RSUs do not create a tax event when they are granted. The tax impact shows up when they vest and, sometimes, when you sell.
Taxes at vesting
Each vesting date is a taxable event.
When your RSUs vest, the total value of the shares that vest on that date is treated as ordinary income and added to your regular income for the year.
To understand when that happens, it helps to know two key terms in your grant:
- Vest commencement date: the date the vesting clock starts.
- Vesting schedule: the timeline that determines when you actually receive your shares.
You usually don’t receive all of your RSUs at once. Instead, they vest over time as long as you remain employed.
The Typical 4-Year Vesting Schedule With 1-Year Cliff
While vesting schedules can vary, the most common structure is four years with a one-year cliff and quarterly vesting thereafter.
Let’s walk though a realistic example:
- Grant Date – January 15, 2026
- Number of RSUs Granted – 1,200
- Vest Commencement Date – January 15, 2026
- Vesting Schedule – 4 years, 1-year cliff, quarterly thereafter
How this works:
- January 15, 2027 (1-year anniversary)
- 25% of your RSUs vest (this is the cliff)
- 25% of 1,200 = 300 RSUs
This means you’ll receive 300 shares of your company’s stock on January 15, 2027.
After that (starting on April 15, 2027), the remaining 900 RSUs vest quarterly for the next 3 years.
- 900 shares ÷ 12 quarters = 75 RSUs every 3 months
This RSU grant will finish vesting on January 15, 2030.
You’ll typically see this laid out clearly in your equity portal (Fidelity, Schwab, E*TRADE, Morgan Stanley, etc.) listing out each vesting date and how many RSUs vest on each date. That’s your vesting schedule.
How withholding usually happens: sell to cover
Most companies do not ask you to write a check for taxes when your RSUs vest.
Instead, they typically withhold taxes automatically by selling or withholding a portion of your vesting RSUs. This is often called sell to cover or share withholding, and it’s why you usually see fewer net shares than the number that vested.
Common withholdings
For U.S. employees, companies usually treat RSU income as “supplemental wages” and withhold federal tax at a flat supplemental rate:
- 22% federal on supplemental income up to $1 million per year
- 37% federal on supplemental income above that threshold
They also withhold:
- Social Security (up to the annual wage base)
- Medicare
- State and local taxes, depending on where you live
Here’s why that matters in real life: your actual marginal tax rate may be much higher than 22%.
If your total income for the year (salary, bonus, RSUs) pushes you into the 32–37% bracket, the 22% federal withholding creates a gap. That gap becomes a tax bill at filing time.
Example:
- Salary: $200,000
- Bonus: $100,000
- RSUs: $100,000
- Total income = $400,000 → roughly 35% federal tax bracket (assuming you file as a single individual)
If your company withholds 22% federal on the RSUs, but your true marginal rate is 35%, you’re short by about 13% on that 100,000 dollars of RSU income – roughly $13,000 of additional federal tax due, before state tax.
This is one of the most common RSU tax surprises.
Taxes when you sell later: cost basis and capital gains
Once RSUs vest, you own the shares. If you sell them later, you may owe additional tax depending on what the stock does after vesting.
Cost Basis
Your cost basis for RSUs is generally the stock price on the day the RSUs vest.
If your RSUs vested at $100 per share, your cost basis is $100 per share.
When you sell:
- Sale price – cost basis = capital gain or loss per share
- If you Sell above cost basis → capital gain
- If you Sell below cost basis → capital loss
Short-term vs. Long-term
- If you hold the stock one year or less after vesting → gains are short-term, taxed at ordinary income rates
- If you hold the stock more than one year → gains are long-term, often taxed at lower rates depending on income
Example:
- 210 shares vested at $100/share → Cost basis = $100/share
- You sell them later at $130/share
Capital Gain:
- $130/share – $100/share = → $30/share gain
- $30/share gain x 210 shares sold = $6,300 total capital gain
- Held for one year or less → Short-term capital gains (taxed like income)
- Held more than a year → Long-term capital gains (usually at a lower tax rate)
If you sell at a loss, you may be able to use that to offset other gains. Keep in mind, this is subject to IRS limits.
Common Mistakes Employees Make around RSUs and Taxes
Most tax problems with RSUs are not because people are careless. They happen because the process is not obvious until you’re living it.
Getting surprised by taxes at vesting
The most common surprise is simply not realizing that each vesting date creates taxable income. People see shares showing up and think, bonus! But the IRS sees compensation, and that income is added to your W-2 for the year.
Assuming RSU withholding is enough
Federal withholding on RSUs is often handled at a flat supplemental rate, and that may not match your actual tax bracket for the year. For higher earners, this can create a significant shortfall. As we stated earlier, most companies only withhold 22% federal tax on RSUs. But if your total income pushes you into the 32–37% tax bracket, you could owe much more at tax time.
Forgetting that blackouts can block you from selling
Vesting and taxation are based on dates in your grant, not on when you’re allowed to trade.
Blackout periods are windows when you’re restricted from trading company stock (often around earnings or major announcements). Your RSUs can still vest during a blackout, which means more income is added to your W‑2 and more tax for the year, even though you may have to wait until trading reopens before you can sell additional shares to raise cash or manage risk. Knowing when blackouts typically occur helps you avoid assuming “I’ll just sell some stock” at a moment when you actually can’t.
Misunderstanding cost basis and “being taxed twice”
Many people worry RSUs are taxed twice.
What’s really happening:
- At vest: the value is taxed as ordinary income
- After vest: only the change in price from vest to sale is taxed as capital gain or loss
If cost basis is reported incorrectly on your 1099‑B, it can look like you’re being taxed twice. This is usually a reporting issue, not an actual double tax if handled correctly.
Treating RSUs in isolation
RSUs affect your entire tax picture. A common mistake is not factoring RSUs into overall income planning, withholding, and year-round tax strategy.
Best Practices for RSUs and Taxes
If you want fewer surprises, the best approach is to treat RSUs like a system: your vesting schedule, your withholding strategy, and a clear plan for what you will do with shares once they hit your account.
Build a vesting + tax plan
Start with a clear picture of your vesting schedule:
- How many RSUs will vest and when
- Estimated value at different stock prices
- How much taxable income that could create
Then layer in your other income (salary, bonus, spouse/partner income) so you can see where your tax bracket may land in big vesting years.
Coordinate withholding and estimated tax payments:
Once you see potential gaps between your tax withholding and your actual rate, you can:
- Increase paycheck withholding
- Make quarterly estimated tax payments
- Use RSU income to fund tax reserves
- Time deductions or charitable giving to high-income years
- Increase RSU withholding when your company allows elections above the default 22%
This is how you close the withholding gap before it shows up as a surprise balance due.
Plan for blackout periods before they trap you
If your vest dates routinely fall near blackout periods, you may have stretches where RSUs vest and increase your income for the year, but you cannot sell additional shares right away.
Knowing your company’s trading windows in advance helps you plan when you can actually take action – whether that’s selling to manage risk, raise cash, or both. If you’re unsure about blackout dates or trading rules, ask your employer for the current policy.
Know your cost basis before you sell
Since cost basis is tied to the vest price, it is worth understanding that number before you place a trade to sell.
Knowing your basis helps you estimate:
- Whether selling will create a gain or loss
- Whether any gain will be short-term or long-term
- How a sale might affect your overall tax picture
Consider simple selling rules to reduce risk
For many people, selling some or all RSUs soon after vesting is a reasonable default because it:
- Reduces exposure to stock-price risk
- Helps avoid becoming overly concentrated in one stock
- Turns RSUs into cash that can be used for goals or reinvested in a diversified portfolio
Some brokerages allow automated or rules-based sale plans, which can help you stick to a consistent approach like “sell X% at vest” instead of making a brand-new decision every time.
What You Learned and What to do Next
RSUs can be a strong part of your compensation. The tax side is manageable, but it works best when you plan around vesting dates instead of reacting after the fact.
Let’s recap what you learned
- RSUs are taxed as ordinary income at vesting, and each vest date is a taxable event
- Most companies handle withholding through sell to cover, so you receive net shares
- When you sell later, taxes depend on your cost basis (the vest price) and whether the stock moved up or down
- Common issues come from under-withholding, blackout timing, and not integrating RSUs into your overall tax plan
- Best practices include building a vesting plan, running projections during the year, coordinating withholding or estimated payments, and understanding your sell options
Remember, it’s important to look at your vesting schedule regularly, estimating the income it may create, and reviewing your withholding so you’re not surprised later.
You Deserve Clarity and Confidence
RSUs don’t have to be a point of stress. With the right guidance and a clear plan, your equity can stop being a source of stress and start becoming a source of opportunity.
At ECA, we specialize in helping employees like you make sense of your equity compensation, optimize your tax strategy, and build long-term wealth.
