Why is my bonus withheld at 22%, and could I still owe tax?
By Kyu-Hun Lee · Published · Updated
Short answer: A withholding percentage is a prepayment calculation, not your final tax rate. Employers can use a 22% federal withholding method for certain separately identified supplemental wages, subject to IRS conditions. Your final income tax depends on your total annual taxable income and return. State taxes and employee payroll taxes are separate.
Separate the paycheck calculation from the annual tax calculation
A bonus is generally wage income. The IRS describes both an optional flat-percentage method and an aggregate method for supplemental wage withholding. The flat method is not mandatory for every bonus. Special rules apply when supplemental wages from the employer exceed $1 million during the year; the excess is subject to a different federal withholding rate.
For planning, compare two full-year estimates: one with your base compensation and one including the bonus. The difference estimates the incremental tax under those assumptions. Comparing the bonus to a single bracket percentage can miss income that crosses brackets, the Social Security wage cap and other adjustments.
Sources: IRS Publication 15 (2026), section 7: Supplemental wages
A $20,000 bonus example
Under a 22% federal withholding assumption, a $20,000 bonus produces $4,400 of federal income-tax withholding. Suppose your separate annual estimate attributes $6,400 of federal tax to that additional income. The difference is $2,000. That is an illustrative federal-only gap, not a prediction of your refund or balance due.
Do not apply that gap directly to your whole paycheck. Other withholding during the year, credits and payments can offset it. Conversely, state and payroll taxes can reduce the payment you receive even when federal withholding is exactly 22%.
Sources: IRS Tax Withholding Estimator
Use an expected payout when comparing offers
Ask whether the stated bonus is guaranteed, a target or a maximum. Check eligibility dates, first-year proration, performance conditions and whether you must still be employed on the payment date. Model the expected payment once, then rerun with zero bonus to see whether the base salary supports your budget.
Our offer comparison includes the bonus in estimated annual wages. It does not reproduce a payroll department’s withholding calculation. Keep the distinction visible when comparing the report with an actual paystub.
- Collect year-to-date wages and withholding from your paystub.
- List expected bonuses and other wage income for the remaining year.
- Use the IRS estimator to check federal withholding using your own details.
- Compare guaranteed pay separately from uncertain compensation.
Put your own offer into the comparison
Separate recurring salary, bonus and sellable RSUs from a signing payment and moving costs. Change the assumptions and download a free report.
Compare my offersCommon questions
Does 22% mean I owe exactly 22% on my bonus?
No. It describes one federal withholding method. Your return reconciles total annual liability with withholding and other payments.
Does the job-offer tool estimate my actual bonus check?
No. It estimates the change in annual taxes from including bonus wages. Payment timing, W-4 elections and employer withholding methods can change the check.
Sources and scope
Source links checked September 24, 2026. Check the year displayed on tax forms; some sources explain general rules using prior-year examples. These guides are educational and have not been independently reviewed by a tax professional. Our calculator supports a narrower set of scenarios than the rules discussed here. Read the model’s scope.