US Bonus Tax Calculator (Flat 22% Supplemental Withholding)
Calculate net take-home bonus after IRS flat 22% supplemental withholding, FICA (6.2% SS + 1.45% Medicare), state taxes, and 401(k) pre-tax contributions.
Calculate net take-home bonus after IRS flat 22% supplemental withholding, FICA (6.2% SS + 1.45% Medicare), state taxes, and 401(k) pre-tax contributions.
Calculate net take-home bonus after IRS flat 22% supplemental withholding, FICA (6.2% SS + 1.45% Medicare), state taxes, and 401(k) pre-tax contributions. Calculate exact, penny-accurate projections compliant with 2026 IRS • St. Louis FED (FRED) standards using Calconova's deterministic IEEE-754 (Decimal.js) calculation engine with instant breakdowns.
Total Taxes Withheld: $3,827 (38%) out of $10,000 gross.
Your estimated marginal federal tax bracket is 22%. Because your bonus was withheld at 22%, you may experience an estimated refund of +$0 when reconciling your total earnings on Form 1040.
\text{TakeHome} = \text{Bonus} - [(\text{Bonus} - 401k) \times (r_{fed} + r_{state})] - (\text{Bonus} \times r_{FICA}) - 401kApplies flat 22% IRS supplemental rate, statutory FICA limits (6.2% SS up to wage base + 1.45% Medicare), state supplemental withholding, and pre-tax deductions.
All calculations, amortizations, and scenario projections displayed on this page are strictly for informational and educational purposes. Nothing herein constitutes investment, financial, tax, underwriting, or legal advice. Actual interest rates, closing costs, lender fees, and statutory criteria may vary. Calconova explicitly disclaims all liability for any financial decisions or actions taken based upon these calculations. Users are strongly advised to consult a certified financial planner, CPA, or licensed lending officer prior to executing financial commitments.
Bonuses are classified as 'supplemental wages' by the IRS. Employers typically withhold a flat 22% federal income tax, plus 6.2% Social Security, 1.45% Medicare, and state supplemental taxes (often 5%–11%). Combined, this withholding reaches 35% to 45% immediately, creating the illusion of a massive penalty.
Yes, frequently. Withholding is merely an upfront estimate. When you file your Form 1040, your bonus is simply added to your total annual taxable income. If the 22% withheld on your bonus was higher than your actual marginal tax bracket (for example, if you are in the 10% or 12% bracket), the IRS refunds the excess in April.
Under the Flat Percentage method, employers withhold exactly 22% on bonuses under $1M. Under the Aggregate method, your employer bundles the bonus into your regular paycheck, calculates tax as if you earned that total every pay period (which can push you temporarily into the 32% or 35% bracket), and withholds the huge difference. The flat method is generally preferred by employees.
Yes. Many employers allow you to contribute up to 100% of your bonus into a traditional 401(k) (subject to the annual IRS limit of $23,500 for 2026). This completely shields the contributed amount from both federal and state income taxes.
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