Restricted Stock Units (RSUs) have become one of the most common forms of equity compensation, especially in tech companies. Unlike stock options, RSUs are simpler to understand but still come with important tax implications. This guide explains everything you need to know about how RSUs are taxed, when you pay taxes, and how to maximize your after-tax value.
What Are RSUs?
Restricted Stock Units (RSUs) are company stock that is granted to you but not immediately yours. You receive the stock when it "vests" (becomes yours) after meeting certain conditions, usually time-based.
Key Terms
Grant: When you receive the RSUs (promise of future stock) Vesting: When the RSUs become yours (usually over time) Vested Shares: Stock you actually own Fair Market Value (FMV): Stock price when shares vest Withholding: Taxes your employer takes out when shares vest
RSUs vs. Stock
RSUs are not stock until they vest:
- You don't own anything until vesting
- You have no voting rights until vesting
- You receive no dividends until vesting
- But you will receive stock when it vests
Once vested: RSUs become actual company stock that you own.
How RSUs Work
The RSU Lifecycle
1. Grant
- Company grants you RSUs (e.g., 1,000 RSUs)
- These are promises of future stock
- Tax: None at grant
2. Vesting Schedule
- RSUs vest over time (usually 25% per year for 4 years)
- Common schedules:
- 25% after 1 year, then monthly/quarterly
- 33% after 1 year, 33% after 2 years, 34% after 3 years
- 100% after 4 years (cliff vesting)
3. Vesting Event
- RSUs become yours
- Company transfers stock to you
- Tax: Ordinary income tax on FMV at vesting
4. Sale
- You sell the stock
- Tax: Capital gains on any appreciation from vesting to sale
Example Timeline
Year 0: Grant 1,000 RSUs Year 1: 250 RSUs vest (stock price $50) → You receive 250 shares Year 2: 250 RSUs vest (stock price $60) → You receive 250 shares Year 3: 250 RSUs vest (stock price $55) → You receive 250 shares Year 4: 250 RSUs vest (stock price $70) → You receive 250 shares Year 5: You sell all 1,000 shares at $75
Tax events: Each vesting event (ordinary income) and sale (capital gains)
Tax Treatment of RSUs
Tax at Grant: None
No tax when RSUs are granted. They're just promises of future stock.
Tax at Vesting: Ordinary Income
This is the main tax event: When RSUs vest, you owe ordinary income tax.
Tax calculation:
- Income = FMV of stock at vesting
- Taxed at your regular income tax rates (10-37%)
- This is ordinary income, not capital gains
Example:
- 250 RSUs vest
- Stock price at vesting: $50/share
- Income: 250 × $50 = $12,500
- Taxed as ordinary income
- If you're in 24% bracket: $3,000 tax
Important: You owe tax on the full value at vesting, even if you don't sell the stock.
Tax at Sale: Capital Gains
After vesting: You own the stock. Any gain or loss from vesting to sale is capital gains/loss.
Basis: Your basis is the FMV at vesting (what was taxed as income).
Capital gains calculation:
- Sale price - Basis (FMV at vesting) = Gain or loss
- Taxed as short-term or long-term (depending on holding period)
Holding period:
- Short-term: < 1 year from vesting → Ordinary income rates
- Long-term: ≥ 1 year from vesting → Capital gains rates (0-20%)
Example:
- Vest at $50 (basis = $50)
- Sell at $75 (1+ years later)
- Gain: $25 per share
- Long-term capital gains: $25 × 15% = $3.75/share
The Two-Tax Hit
RSUs are taxed twice:
- At vesting: Ordinary income tax on full value
- At sale: Capital gains tax on appreciation
This is different from stock options, where you only pay tax when you exercise (and gain is usually capital gains if you hold).
When You Pay Taxes on RSUs
Tax Timeline
Grant: No tax Vesting: Ordinary income tax on FMV at vesting Sale: Capital gains tax on appreciation from vesting to sale
The Vesting Tax Event
When RSUs vest:
- Company transfers stock to you
- FMV at that moment is your income
- You owe ordinary income tax
- Employer usually withholds taxes
You pay tax even if you don't sell:
- This is important: You owe tax on the value at vesting
- Even if stock price drops after vesting
- You need cash to pay the tax (or sell some shares)
The Sale Tax Event
When you sell:
- Any gain from vesting price to sale price is capital gains
- Any loss is capital loss (can offset other gains)
Holding period matters:
- Hold < 1 year: Short-term capital gains (ordinary income rates)
- Hold ≥ 1 year: Long-term capital gains (0-20% rates)
Withholding on RSUs
How Employers Handle Withholding
Most employers sell shares to cover taxes:
- When RSUs vest, employer sells some shares
- Uses proceeds to pay withholding
- You receive remaining shares
Withholding rates:
- Federal: 22% (supplemental wage rate) or your regular rate
- Social Security: 6.2% (if under $168,600 cap)
- Medicare: 1.45% (plus 0.9% if over threshold)
- State: Varies by state
Total withholding: Usually 30-40% of vested value
Example: Withholding on RSUs
Scenario:
- 250 RSUs vest
- Stock price: $50/share
- Value: $12,500
Withholding (assuming 22% federal + FICA):
- Federal (22%): $2,750
- Social Security (6.2%): $775
- Medicare (1.45%): $181
- Total: $3,706 (29.6%)
Shares sold for tax: $3,706 ÷ $50 = ~74 shares Shares you receive: 250 - 74 = 176 shares
What If Withholding Isn't Enough?
If your tax bracket is higher than 22%:
- Employer withholds 22% (supplemental rate)
- But you may be in 24%, 32%, or 37% bracket
- You'll owe more at tax time
Example:
- RSUs vest: $100,000 value
- Withholding (22%): $22,000
- But you're in 32% bracket: $32,000 tax
- You'll owe: $10,000 at tax time
Solution: Set aside money or sell more shares to cover additional tax.
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RSUs vs. Stock Options
Key Differences
RSUs:
- You receive stock when it vests
- Taxed as ordinary income at vesting
- No choice (you get stock automatically)
- Simpler to understand
Stock Options:
- You have the right to buy stock
- Taxed when you exercise (for NQSOs) or sell (for ISOs, if holding requirements met)
- You choose when to exercise
- More complex tax rules
Tax Comparison
RSUs:
- Vesting: Ordinary income on full value
- Sale: Capital gains on appreciation
- Two tax events
NQSOs:
- Exercise: Ordinary income on spread
- Sale: Capital gains on appreciation
- Two tax events (similar to RSUs)
ISOs:
- Exercise: Possible AMT (but usually no regular tax)
- Sale: Capital gains (if holding requirements met)
- Potentially one tax event (if AMT doesn't apply)
Which Is Better?
Depends on:
- Stock performance
- Your tax situation
- Your preferences
- Company's compensation structure
RSUs are simpler but you pay tax even if stock drops after vesting.
Options give you choice but are more complex and may have AMT issues (ISOs).
Strategies to Minimize Taxes on RSUs
Strategy 1: Hold for Long-Term Capital Gains
After vesting: Hold stock for ≥ 1 year before selling.
Benefit: Gain from vesting to sale is long-term capital gains (0-20%) instead of short-term (ordinary income rates).
Example:
- Vest at $50, sell at $75
- If sold < 1 year: $25 gain taxed at 24% = $6/share
- If sold ≥ 1 year: $25 gain taxed at 15% = $3.75/share
- Savings: $2.25/share
Strategy 2: Sell to Cover Tax, Hold the Rest
When RSUs vest:
- Employer sells some shares for tax (automatic)
- You receive remaining shares
- Hold those shares for long-term gains
Benefit: You've paid tax, now any appreciation is long-term capital gains.
Strategy 3: Time Vesting Strategically (Rarely Possible)
If you have control (usually you don't):
- Vest in lower-income year
- May reduce tax rate on vested value
But: Most RSUs vest on schedule, you can't control timing.
Strategy 4: Maximize Retirement Contributions
Reduce taxable income:
- Contribute to 401(k) (reduces ordinary income)
- May help reduce tax on RSU vesting
Example:
- RSUs vest: $50,000
- Contribute $23,000 to 401(k)
- Taxable income reduced by $23,000
- Lower tax on RSUs (indirectly, through lower bracket)
Strategy 5: Use Tax-Loss Harvesting
If you have other investments with losses:
- Sell losing positions to offset gains from RSU sales
- Reduces overall tax liability
Strategy 6: Consider Charitable Giving
Donate appreciated RSU stock:
- Instead of selling and donating cash
- Avoid capital gains tax
- Get charitable deduction
How: Donate stock directly to charity (don't sell first).
Strategy 7: Plan for Tax at Vesting
Set aside money:
- Know when RSUs will vest
- Calculate expected tax
- Set aside money to cover (if withholding isn't enough)
Or sell shares:
- Sell enough shares at vesting to cover tax
- Hold remaining shares for long-term gains
Common RSU Scenarios
Scenario 1: Regular Vesting Schedule
Situation: 1,000 RSUs, 25% vest each year for 4 years
Tax impact:
- Tax each year as shares vest
- Ordinary income tax on FMV at each vesting
- Capital gains when you sell (if you hold)
Strategy:
- Plan for tax each year
- Hold vested shares for long-term gains
- Consider selling some to diversify
Scenario 2: Large Vesting Event
Situation: Significant number of RSUs vest at once
Tax impact:
- Large ordinary income tax bill
- May push you into higher bracket
- Withholding may not be enough
Strategy:
- Calculate tax before vesting
- Set aside money or plan to sell shares
- Consider maximizing deductions that year
Scenario 3: Stock Price Drops After Vesting
Situation: RSUs vest at $50, you pay tax on $50, stock drops to $30
Tax impact:
- You already paid tax on $50 value
- Stock is now worth $30
- You've overpaid tax (no way to get it back)
This is a risk of RSUs: You pay tax on value at vesting, even if stock drops.
Strategy:
- Consider selling at vesting if you're concerned about price
- Or hold and hope for recovery (but you've already paid tax)
Scenario 4: Leaving Company
Situation: RSUs vest when you leave (or accelerate)
Tax impact:
- Same as regular vesting
- Ordinary income tax on FMV at vesting
Strategy:
- Plan for tax
- Consider tax implications when negotiating departure
Scenario 5: RSUs + Stock Options
Situation: You have both RSUs and stock options
Tax impact:
- RSUs: Tax at vesting (ordinary income)
- Options: Tax at exercise (ordinary income for NQSOs, possible AMT for ISOs)
- Both create taxable events
Strategy:
- Coordinate timing if possible
- Plan for tax from both
- Consider overall tax situation
Mistakes to Avoid
Mistake 1: Not Planning for Tax at Vesting
Problem: RSUs vest, large tax bill, no cash to pay it.
Fix: Calculate tax before vesting, set aside money, or plan to sell shares.
Mistake 2: Selling Immediately After Vesting
Problem: Sell right after vesting, pay short-term capital gains on any gain.
Fix: Hold for ≥ 1 year for long-term capital gains rates (if you believe in the stock).
Mistake 3: Not Understanding Withholding
Problem: Think 22% withholding is enough, but you're in higher bracket.
Fix: Understand your tax bracket, set aside money for additional tax.
Mistake 4: Not Tracking Basis
Problem: Don't know your basis when you sell, can't calculate gains correctly.
Fix: Track FMV at each vesting event (this is your basis).
Mistake 5: Over-Concentrating in Company Stock
Problem: Hold all RSUs, too much concentration in one stock.
Fix: Consider selling some to diversify, even if it means paying tax.
Mistake 6: Not Getting Professional Help
Problem: Complex tax situations, make mistakes.
Fix: Consult tax professional for significant RSU grants or complex situations.
Frequently Asked Questions
When Do I Pay Taxes on RSUs?
At vesting: Ordinary income tax on FMV at vesting At sale: Capital gains tax on appreciation from vesting to sale
Are RSUs Taxed as Income or Capital Gains?
At vesting: Ordinary income (taxed at regular rates) At sale: Capital gains (short-term or long-term, depending on holding period)
Do I Pay Tax Even If I Don't Sell?
Yes: You pay ordinary income tax when RSUs vest, even if you don't sell the stock.
What Is My Basis in RSU Stock?
Your basis is the FMV at vesting (the amount that was taxed as income).
Can I Avoid Taxes on RSUs?
Not entirely: You'll pay tax when RSUs vest. But you can minimize taxes by:
- Holding for long-term capital gains
- Maximizing deductions
- Timing strategically (if possible)
Should I Sell RSUs Immediately or Hold?
Depends on:
- Your belief in the stock
- Your need for cash
- Your tax situation
- Your diversification needs
Generally: Consider holding for long-term gains if you believe in the stock and can afford to.
What Happens If Stock Drops After Vesting?
You've already paid tax on the higher value. You can't get that tax back. This is a risk of RSUs.
Do I Pay Social Security Tax on RSUs?
Yes: RSUs are subject to FICA taxes (Social Security and Medicare) when they vest, just like regular wages.
Bottom Line: Master RSU Taxes
RSUs are simpler than stock options, but understanding the tax rules helps you maximize value.
Key Takeaways:
- RSUs are taxed at vesting—ordinary income tax on FMV
- You pay tax even if you don't sell—this is important to understand
- Hold for long-term gains—after vesting, hold ≥ 1 year for better rates
- Plan for tax at vesting—set aside money or plan to sell shares
- Withholding may not be enough—if you're in higher bracket, you'll owe more
Action Steps:
- Understand: When RSUs will vest and what the tax will be
- Calculate: Tax at vesting (FMV × your tax rate)
- Plan: Set aside money or plan to sell shares to cover tax
- Consider: Holding for long-term gains after vesting
- Review: Your overall equity compensation strategy
Remember: RSUs can be valuable compensation, but they come with tax obligations. Understand when you'll pay taxes, plan ahead, and you can maximize your after-tax value.
Next Steps:
- Review your RSU grant documents and vesting schedule
- Calculate expected tax at each vesting event
- Read our guide: "Stock Options and Taxes Explained"
- Learn about: "ESPPs and Capital Gains Explained"
- Consider consulting a tax professional for significant grants
Don't let tax complexity prevent you from maximizing the value of your RSUs. Understand the rules, plan ahead, and make informed decisions about when to hold and when to sell.
