Estimate tax on estimated payment under current federal tax law.
Estimated tax payments cover income with no withholding. Tax is estimated under current federal tax law by applying the rate you enter.
Tax
Tax = estimated payment × rate
Estimate only.
For supplemental income such as bonuses many employers use a flat 22% federal rate; other situations vary.
Rates are approximate reference values. Local rates, exemptions and rules can differ, so treat the output as a planning figure only.