RSU Vesting and Retirement: Projecting Your After-Tax Wealth
Use this guide to understand the assumptions, inputs, results, and next steps behind the calculator.
Restricted Stock Units (RSUs) are one of the most powerful wealth-building tools in modern compensation packages, but they come with a heavy tax burden. When your shares vest, their total market value is treated as ordinary income. Depending on your tax bracket, you might surrender 30% to 50% of your grant just to cover federal, state, and payroll taxes before you even see the proceeds.
This calculator projects the after-tax value of your RSUs at each vesting event and models how those funds can accelerate your financial independence. By dedicating a percentage of your net RSU proceeds to a diversified portfolio, you can transition single-company equity into long-term wealth. Whether you are building a realistic retirement plan or simply want to know how much your unvested shares will actually be worth, understanding the mechanics of RSU taxation and compounding growth is essential.
The Tax Drag on RSUs in 2026
When RSUs vest, they are not taxed at the favorable long-term capital gains rate. Instead, the IRS treats the value of the vesting shares as supplemental income, identical to a cash bonus.
To project your actual take-home wealth, you must account for three separate tax layers.
| Tax Component | 2026 Rate | How It Applies to RSUs |
|---|---|---|
| Federal Income Tax | 10% to 37% | Taxed at your marginal ordinary income bracket. Employers typically withhold a flat 22% for supplemental income (or 37% for amounts over $1 million), which often creates a tax shortfall for high earners. |
| FICA (Payroll) Tax | 7.65% | 6.2% for Social Security (up to the annual wage base limit) plus 1.45% for Medicare. High earners pay an additional 0.9% Medicare surtax. |
| State Income Tax | 0% to 13.3%+ | Taxed at your state's marginal rate. Some states require a specific flat withholding rate for equity compensation, while others use standard income brackets. |
The Withholding Mismatch
One of the most frequent financial shocks for RSU recipients is the withholding mismatch. Your employer will likely automatically sell a portion of your newly vested shares to cover taxes—a process known as a "sell-to-cover" transaction.
However, the default federal withholding rate is 22%. If your total compensation places you in the 24%, 32%, or 35% tax bracket in 2026, that 22% withholding will not be enough to satisfy your IRS liability. You will owe the difference when you file your tax return. When modeling your net proceeds, always use your actual marginal tax rate rather than the default withholding rate to avoid an unexpected tax bill.
Hold vs. Sell: Deciding What to Do at Vesting
Once your shares vest and taxes are paid, you face a critical decision: do you hold the remaining company stock, or do you sell it immediately to fund your broader financial goals?
Many employees default to holding the stock because they believe in their company's future. However, financial planners generally recommend selling RSUs as soon as they vest to diversify into broader index funds or retirement accounts.
| Strategy | Advantages | Risks |
|---|---|---|
| Hold Company Stock | Maximizes upside if the company outperforms the market; defers capital gains taxes on future growth until sold. | Creates extreme concentration risk. If the company struggles, you lose both your employment income and your investment wealth simultaneously. |
| Sell and Diversify | Locks in the current value; allows you to build a balanced portfolio; reduces volatility. | You might miss out on a massive stock rally; requires discipline to manually reinvest the cash proceeds. |
If you sell immediately upon vesting, there is generally no capital gains tax on the sale because the cost basis (the value at vesting) equals the sale price. The taxes you pay are strictly the ordinary income taxes on the vesting event itself.
By taking the net proceeds and moving them into a diversified brokerage account or using them to max out your 401(k), you shift from single-stock speculation to predictable, tax-efficient retirement planning.
How Vesting Schedules Impact Your Timeline
Your company's vesting schedule dictates exactly when your equity becomes liquid cash. Because market prices fluctuate daily, the timing of your vesting events heavily influences your ultimate net proceeds.
The 1-Year Cliff
Most standard tech industry grants feature a four-year vesting schedule with a one-year "cliff." This means you receive nothing for your first 12 months of employment. On your one-year anniversary, 25% of your total grant vests all at once. If you leave the company on day 364, you forfeit the entire grant.
Quarterly and Monthly Vesting
After the initial cliff is met, the remaining 75% of the shares typically vest in regular intervals—most commonly every three months (quarterly) or every month. Some modern companies have eliminated the cliff entirely, opting for immediate monthly or quarterly vesting to remain competitive in the talent market.
When projecting your retirement wealth, frequent vesting (like monthly) is mathematically advantageous. It allows you to sell and reinvest the proceeds into your retirement portfolio sooner, giving the funds more time to compound.
Scenario: Accelerating Retirement with a $150,000 Grant
To see how RSUs fit into an advanced retirement plan, let's walk through a realistic projection for a 35-year-old software engineer.
The Setup:
- Total Grant: 1,000 shares at $150/share ($150,000 total value)
- Vesting Schedule: 4 years, 1-year cliff, quarterly thereafter
- Company Stock Growth: 6% annually
- Marginal Tax Rate: 35% combined (Federal + State + FICA)
- Retirement Strategy: Sell 100% of net proceeds and invest for retirement at a 7% annual return.
The First Vesting Event (The Cliff): At the end of year one, 250 shares vest. Because the company stock grew at 6%, the share price is now $159.
- Gross Value: 250 shares × $159 = $39,750.
- Taxes Owed (35%): $13,912.
- Net Proceeds: $25,838.
Instead of leaving that $25,838 in company stock, the engineer sells it and moves it into a diversified index fund.
The Long-Term Impact: Over the full four years, the stock continues to grow, and shares vest quarterly. After all taxes are paid, the engineer successfully extracts roughly $115,000 in net proceeds. Because they are 35 and plan to retire at 65, that $115,000 has 26 to 30 years to compound at 7%.
By the time they reach age 65, that single RSU grant has grown into more than $800,000 in retirement wealth. This highlights why treating RSUs as a core component of your retirement savings by age is so effective.
The Math Behind Your RSU Retirement Projection
The calculator runs a chronological simulation, computing the exact value of your shares at every vesting date, subtracting the tax drag, and compounding your chosen contribution percentage until your retirement age.
Here is the step-by-step math the calculator uses to project your wealth:
1. Value at Vesting
First, the calculator determines what your company stock will be worth on each specific vesting date, assuming a steady growth rate.
stock price at vesting = grant price × (1 + annual stock growth rate) ^ years from grant
value at vesting = shares vested × stock price at vesting
Where:
- grant price = the stock price on the day you were awarded the RSUs.
- annual stock growth rate = your assumption for how much the company stock will appreciate each year.
- years from grant = the time elapsed between the grant date and this specific vesting event.
- shares vested = the number of shares released to you on this date.
2. Tax Drag and Net Proceeds
Next, the calculator applies your marginal tax rates to determine how much cash you actually walk away with.
total taxes = value at vesting × (federal tax rate + state tax rate + FICA tax rate)
net proceeds = value at vesting - total taxes
Where:
- federal tax rate = your top marginal IRS income tax bracket.
- state tax rate = your state's income tax rate.
- FICA tax rate = payroll taxes (typically 7.65%).
3. Future Retirement Value
Finally, the calculator takes the percentage of proceeds you choose to save and compounds it until your retirement age.
retirement contribution = net proceeds × percentage to fund retirement
future retirement value = retirement contribution × (1 + retirement account annual return) ^ years to retirement
Where:
- percentage to fund retirement = the share of your after-tax RSU cash you plan to invest.
- retirement account annual return = the expected growth rate of your diversified retirement portfolio.
- years to retirement = the number of years between the vesting date and your planned retirement age.
The calculator runs this sequence for every single vesting event (e.g., all 13 events in a standard 4-year schedule with a 1-year cliff and quarterly vesting) and sums the final future values to give you your total projected retirement wealth.
Frequently Asked Questions
Quick answers to the questions people usually have after running the retirement calculator.
1Are RSUs taxed when they are granted or when they vest?
RSUs are taxed when they vest, not when they are granted. When the shares officially transfer to your control, their total market value on that day is treated as ordinary income and reported on your W-2.
2Does selling my RSUs immediately trigger capital gains tax?
Generally, no. If you sell your RSUs on the exact day they vest, the sale price is identical to the vesting price. Since your cost basis (the value at vesting) equals the sale price, there is zero capital gain. You will only pay the ordinary income tax generated by the vesting event itself.
3How is the FICA tax calculated on RSUs?
RSU vesting is considered earned income, meaning it is subject to the FICA tax. This includes 6.2% for Social Security (until your total earned income hits the annual wage base limit, which is $168,600 in 2024 and adjusts annually) and 1.45% for Medicare. There is no income cap on the Medicare portion, and high earners may owe an additional 0.9% Medicare surtax.
4Can I roll my RSUs directly into a 401(k) or IRA?
No, you cannot transfer shares of company stock directly from your equity portal into a standard 401(k) or IRA. You must sell the RSUs in your taxable brokerage account, take the cash proceeds, and then use that cash to fund an IRA or offset payroll deductions for your 401(k).
5What happens to unvested RSUs if I leave my job?
If you quit, are fired, or are laid off, you typically forfeit all unvested RSUs immediately. The shares return to the company. You keep any shares that have already vested, as those belong to you entirely.
6Should I hold my RSUs for a year to get long-term capital gains rates?
Holding RSUs for 12 months after vesting qualifies any subsequent growth for the lower long-term capital gains rate. However, the initial value at vesting is still taxed as ordinary income regardless of how long you hold the shares. Most advisors warn against holding just for tax purposes, as the risk of the stock plummeting over that year usually outweighs the minor tax savings on the growth.
7How do RSUs differ from an ESOP?
An Employee Stock Ownership Plan (ESOP) is a qualified retirement plan where the company allocates shares to a trust on behalf of employees, usually tied to retirement age. RSUs are direct equity grants that vest while you are working and become liquid, taxable assets immediately upon vesting. If your company offers an ESOP, you can project its value using an ESOP retirement calculator.
Next Steps
To build a complete picture of your financial future, your RSU strategy should integrate with your broader portfolio. Once you know how much your equity grants will contribute to your net worth, use the tax-efficient retirement withdrawal calculator to see how to minimize taxes when you eventually spend those funds.
If you are reinvesting your RSU proceeds into income-producing assets, the dividend reinvestment calculator can help you model the compounding effect of those dividends. Finally, review what is the best order to withdraw from retirement accounts to ensure your hard-earned equity isn't lost to inefficient tax planning in your later years.