RSU Tax Planning: When to Sell and How to Minimize the Tax Hit
A former CFP explains the tax mechanics of restricted stock units — vesting taxation, capital gains timing, and coordination with other income for tech and corporate employees.
How RSU Taxation Actually Works
Restricted Stock Units are taxed differently from stock options, and the distinction matters.
At vesting: the fair market value of vested shares is ordinary income, reported on your W-2. Your employer typically withholds a flat 22% federal supplemental rate (or 37% for amounts above $1M). If your effective tax rate is higher than 22%, the withholding is insufficient — you owe the difference at tax time.
After vesting: the shares have a cost basis equal to the FMV at vesting. If the stock price increases after vesting and you hold for more than 12 months before selling, that gain is taxed at long-term capital gains rates (0%, 15%, or 20% depending on income).
The critical implication: there is no tax disadvantage to selling immediately at vesting in terms of the ordinary income portion. The only tax consideration for immediate sale is eliminating capital gains exposure — both potential gains and the concentrated position risk.
The Coordination Problem with High-Income Earners
For employees at large tech companies with significant RSU vesting schedules, the real planning challenge is bracket management.
If your base salary already puts you in the 32% bracket, additional RSU income is taxed at 32-37%. The withholding at 22% creates a predictable tax shortfall that must be planned for.
Strategies worth modeling: - Increasing 401(k) contributions to the maximum in years with heavy RSU vesting - Charitable contributions (bunching into years with large RSU vesting) - Timing of other discretionary income events
Note: RSU income also affects IRMAA if you're on Medicare, Net Investment Income Tax calculations, and potentially the Additional Medicare Tax (0.9% on wages above $200K single / $250K MFJ).
This article is for educational and informational purposes only. It does not constitute investment advice, financial planning advice, or a recommendation to buy or sell any security. AI Financial Plan is not a registered investment adviser, broker-dealer, or financial planner. You should consult with a qualified professional before making financial decisions. Past performance and projected outcomes are not guarantees of future results.
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