RSU Tax Withholding Estimator
Employers withhold RSU vests at a flat supplemental-wage rate — this estimates how far that falls short of what you'll actually owe once the vest is combined with the rest of your year's income.
Estimated federal withholding gap on this vest
Combined taxable income after this vest:
Marginal federal bracket on the last dollar of this vest:
Estimated federal tax owed on this vest:
Federal tax withheld on this vest (supplemental-wage rate):
Educational estimate using 2026 federal brackets only — excludes state tax, FICA, and any credits or deductions beyond the standard deduction. Not tax advice; verify with a preparer before setting a quarterly estimated payment.