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You just got your first RSU grant. You're excited—until you talk to your colleague who had RSUs vest last year. They made $200,000 in equity comp and ended up with a $95,000 tax bill. They didn't have cash saved, so they sold all vested shares just to cover taxes, plus still owed the IRS at filing.
"Nobody told me," they said. "I thought the company handled all the taxes."
Here's the reality: RSU taxation is straightforward in concept but brutal in execution. Without proper planning, you can end up with a massive bill, underpayment penalties, and zero shares left.
How Are RSUs Taxed at Vesting?
Restricted Stock Units are taxed as ordinary income when they vest.
When RSUs vest, the IRS treats them like a cash bonus. If $100,000 vests, that's $100,000 of taxable income added to your W-2, taxed at your marginal rate.
Your marginal federal rate (2025):
- 37% if you earn over $609,350 (single)
- 35% for $243,725-$609,350
- 32% for $191,950-$243,725
- Plus state tax (0-13.3% depending on state)
- Plus Medicare (1.45%, or 2.35% over $200,000)
Real example: You're in California earning $180,000 base. You have $150,000 RSUs vest.
- Total income: $330,000
- Federal tax on RSUs: ~$48,000 (32%)
- California state: ~$16,500 (11%)
- Medicare: ~$2,175
- Total tax on RSUs: ~$66,675 (44.5%)
Your company withholds shares to cover some of this, but often not enough.
Why RSU Taxes Feel Higher Than Salary Taxes
Because they often are. RSU vesting pushes you into higher brackets.
If your base is $150,000 (24% bracket) but add $200,000 RSUs, your total income is $350,000—now in the 35% bracket. That extra RSU income is taxed at the higher rate.
Plus, company default withholding (typically 22% federal) is often lower than your actual marginal rate.
Can I Defer RSU Taxes?
No—not in the way most people hope.
Unlike 401(k) contributions, there's no mechanism to defer RSU taxes. When shares vest, you owe taxes. Period.
Two narrow exceptions (most employees don't qualify):
- Section 83(i) election (private companies only, specific criteria)
- Deferring vest date itself (executive-level negotiation)
For 99% of employees, RSU taxes are unavoidable. The game is minimizing them.
Tax Strategies to Reduce RSU Liability
Strategy 1: Maximize Pre-Tax Retirement Contributions
Every dollar in a 401(k), traditional IRA, or HSA reduces taxable income—reducing taxes owed on RSUs.
The math: If you're in 35% federal + 10% state, every $1,000 to traditional 401(k) saves $450 in taxes.
2025 limits:
- 401(k): $23,500 ($31,000 if 50+)
- HSA: $4,300 (individual) or $8,550 (family)
- Traditional IRA: $7,000 ($8,000 if 50+)
Strategy 2: Increase W-4 Withholding Before Large Vests
Company default withholding (22% federal) is probably too low if you're in higher brackets.
File a new W-4 to increase withholding. You can request additional withholding per paycheck (e.g., "$500 extra per check") timed around vest dates.
Why this matters: If you underwithhold by >$1,000, you may owe underpayment penalties even if you pay at filing.
Strategy 3: Make Estimated Tax Payments
If withholding isn't enough, make quarterly estimated payments (IRS Form 1040-ES).
Safe harbor rule: Pay at least 90% of current year's tax OR 110% of last year's tax (via withholding + estimated payments) to avoid penalties.
Strategy 4: Tax-Loss Harvesting on Vested Shares
After RSUs vest, any decline creates capital loss. Sell those shares at a loss to offset other gains (or up to $3,000/year of ordinary income, with indefinite carryforward).
Caution: Watch the wash-sale rule. If you sell at a loss and new RSUs vest within 30 days (common with quarterly vesting), the loss may be disallowed.
Strategy 5: Charitable Giving of Appreciated Shares
If RSUs vest and appreciate, donate appreciated shares directly to charity instead of selling.
Benefits:
- Charitable deduction for full FMV
- Avoid capital gains tax on appreciation
Important: Must donate shares held >1 year for full benefit. Shares held <1 year limit deduction to cost basis.
Strategy 6: Stack High-Income and Low-Income Years
If possible, concentrate RSU vesting in years with lower income from other sources.
Scenarios:
- Sabbatical or career break
- Parental leave (unpaid or partially paid)
- Moving to lower-tax state mid-year
Some companies let you negotiate vesting schedules. Ask if you can backload (10/20/30/40 instead of 25/25/25/25).
Strategy 7: Consider Relocating to Low/No Tax States
State taxes on RSUs are brutal. California (13.3%), New York (10.9%), and other high-tax states take massive bites.
Moving to no-tax states (Texas, Florida, Nevada, Washington) could save tens of thousands annually.
Caution: States audit aggressively. If relocating:
- Establish domicile (license, voter registration, bank accounts)
- Spend >183 days/year in new state
- Don't maintain home in old state
Strategy 8: Sell Shares Immediately to Avoid Additional Gains
RSUs are taxed at vesting, but appreciation/depreciation after creates additional capital gains/losses.
Selling immediately after vest locks in your tax bill with no additional exposure. You've paid ordinary income tax—selling right away adds zero (or minimal) capital gains.
Common RSU Tax Mistakes
Mistake 1: Assuming Company Withholds Enough
Default 22% is fine for low brackets. But if you're 35-37%, you're massively underwitheld.
Fix: Increase W-4 withholding or make estimated payments.
Mistake 2: Not Saving for the Tax Bill
Even with withholding, you might owe more at filing. If you haven't saved, you're forced to sell shares—potentially at a bad time.
Fix: Assume 45-50% of RSU value goes to taxes if you're a high earner.
Mistake 3: Forgetting State Taxes
Federal gets attention, but state adds 5-13%.
Fix: Calculate total tax (federal + state + Medicare) when modeling RSU vests.
Mistake 4: Holding Vested Shares Without a Plan
Holding indefinitely creates concentration risk and defers decisions. Without a plan, you'll make emotional decisions based on price movements.
Fix: Decide sell strategy in advance (sell immediately, after 1 year, or rebalance to target).
Your RSU Tax Action Plan
Step 1: Calculate total expected RSU vesting for the year
Step 2: Model total tax liability (federal + state + Medicare)
Step 3: Compare expected tax to current withholding
Step 4: If under-withholding, file new W-4 or make estimated payments
Step 5: Max out pre-tax retirement accounts
Step 6: Create sell/hold plan for vested shares
RSU taxation is painful but predictable. With planning, you can minimize damage and keep more equity.
This content is for educational purposes only and should not be considered as tax, legal, or investment advice. Tax laws are complex and subject to change. Every individual's situation is unique. Consult with a qualified tax professional or CPA before implementing tax strategies.
The scenarios presented are simplified examples for illustrative purposes and may not reflect actual tax liability in all situations.
The strategies discussed may not be suitable for all taxpayers. Some have specific rules and requirements.
Securities offered through LPL Financial, Member FINRA/SIPC. Investment advice offered through Great Valley Advisor Group, a registered investment advisor and separate entity from LPL Financial.
Chesapeake Financial Planners | 2402 Scotlon Ct, Forest Hill, MD 21050 | (410) 652-7868 | www.chesapeakefp.com