This calculator helps employees and financial planners estimate tax liabilities on vested restricted stock units. It accounts for vesting value, tax rates, and withholdings to show net after-tax income. Use it to plan your post-vest financial strategy and adjust your budget accordingly.
RSU Tax Breakdown
How to Use This Tool
Start by entering the number of vested RSUs you received in the designated field. Next, input the fair market value (FMV) of the stock per share on the vesting date, and select your local currency from the dropdown. Choose your tax filing status, then enter your applicable federal, state, Medicare, and Social Security tax rates as percentages. Click the Calculate button to generate your tax breakdown, or Reset to clear all fields. Use the copy button to save your results to your clipboard.
Formula and Logic
The calculator uses the following core logic to compute your RSU tax liability:
- Total Vesting Value = Number of Vested RSUs × FMV per Share
- Federal Tax Withholding = Total Vesting Value × (Federal Tax Rate / 100)
- State Tax Withholding = Total Vesting Value × (State Tax Rate / 100)
- Medicare Tax Withholding = Total Vesting Value × (Medicare Tax Rate / 100)
- Social Security Tax Withholding = Total Vesting Value × (Social Security Tax Rate / 100)
- Total Tax Liability = Sum of all above withholdings
- Net After-Tax Income = Total Vesting Value - Total Tax Liability
- Effective Tax Rate = (Total Tax Liability / Total Vesting Value) × 100
Note that this calculation assumes all taxes are withheld at the flat rates you provide, and does not account for progressive tax brackets or additional Medicare surcharges.
Practical Notes
For personal finance and tax planning, keep these RSU-specific tips in mind:
- RSUs are taxed as ordinary income at vesting, not when you sell the shares later.
- Employers typically withhold taxes automatically, but you may owe additional taxes when filing your annual return.
- Medicare tax applies to all earned income, with an additional 0.9% surcharge for high earners (not included in this calculator).
- Social Security tax only applies to income up to the annual wage base limit set by the IRS (adjust your rate input if your total income exceeds this threshold).
- State tax rates vary widely by location, so verify your current rate with your local tax authority.
Why This Tool Is Useful
This calculator helps employees with equity compensation avoid surprises at tax time by estimating net income from vested RSUs. Financial planners can use it to model tax liabilities for clients with equity packages, and individuals can adjust their withholding rates or contribution strategies based on the results. It removes guesswork from RSU tax planning, letting you align your vesting income with your broader budget and savings goals.
Frequently Asked Questions
Are RSUs taxed differently than stock options?
Yes. RSUs are taxed as ordinary income when they vest, based on the fair market value of the shares on the vesting date. Stock options are taxed when you exercise them, with tax liability based on the difference between the exercise price and the FMV at exercise.
Do I pay taxes on RSUs when I sell the shares?
No. The income tax and payroll tax on RSUs are due at vesting. When you sell the shares later, you will only owe capital gains tax on any increase in value from the vesting date to the sale date, which is not calculated by this tool.
Can I adjust my tax withholdings for RSUs?
Yes. You can submit a new Form W-4 to your employer to adjust federal withholdings, or contact your payroll department to update state withholding rates. This calculator lets you test different withholding scenarios to find the rate that works best for your financial plan.
Additional Guidance
Always consult a certified tax professional before making major financial decisions based on these estimates. Tax laws change frequently, and this calculator does not account for all possible deductions, credits, or local tax rules. Keep records of all vesting dates and FMVs to simplify your annual tax filing. If you have RSUs vesting across multiple years, run separate calculations for each vesting event to model your total annual tax liability.