Why Bonus Withholding Feels So High in 2026
Bonuses are classified as supplemental wages by the IRS. In 2026, employers must withhold federal income tax on bonuses at a flat 22% supplemental rate (37% above $1 million), regardless of your normal tax bracket. This often results in heavier withholding than your regular paycheck, but your actual tax owed is determined by your effective rate when you file.
Key Findings
- 22% is a withholding rule, not your final tax rate.
- Lower-bracket earners are often over-withheld and refunded later.
- Higher-bracket earners can be under-withheld relative to actual liability.
Bonus withholding comparison
| Bonus | Flat 22% federal | Actual tax delta | Over / under |
|---|---|---|---|
| $5,000 | $1,100 | $1,730 | $-630 |
| $10,000 | $2,200 | $3,460 | $-1,260 |
| $25,000 | $5,500 | $8,650 | $-3,150 |
| $50,000 | $11,000 | $17,364 | $-6,364 |
The Two IRS Methods for Bonus Withholding
Employers generally use one of two federal methods for supplemental wages such as bonuses. The first is the flat-rate method, where federal income tax is withheld at a standard supplemental wage rate for most bonus amounts below the top threshold. This is the method many employees notice because it creates the familiar 22% federal withholding line on the payment.
The second is the aggregate method. Under that approach, payroll adds the bonus to regular wages for the pay period and calculates withholding on the combined amount, then backs into the bonus withholding figure. That method can produce a heavier result because the temporary combined paycheck may look much larger than a normal cycle. Many employers prefer the flat method for simplicity, but both approaches are withholding mechanics rather than statements of your final tax rate.
Your Annual Tax Return Reconciles the Difference
The amount withheld from the bonus is only a prepayment. When you file your tax return, the bonus is added to the rest of your annual wages and taxed under your actual year-end result. If the federal bonus withholding was higher than your true marginal outcome, you may receive part of that over-withheld amount back as a refund. If it was too low, you may owe the difference at filing.
That is why a bonus can feel heavily taxed in the moment even when the final annual result is less severe. Withholding controls cash flow during the year; the return controls the final reconciliation.
State Bonus Tax: Another Layer
States can make the experience more complicated because they do not all treat supplemental wages the same way. Some follow a flat supplemental withholding approach, while others fold bonuses into broader wage calculations. If you live in a state with income tax, that extra layer can change the amount withheld by more than many employees expect.
For a state-specific estimate, use the bonus tax calculator.
How to Verify Your Bonus Was Withheld Correctly
Compare the bonus pay stub with your regular withholding pattern, then model the same compensation in the bonus tax calculator. That will not reproduce every payroll system nuance, but it will show whether the federal and state withholding direction is plausible for your pay level and filing status.
If the employer used the aggregate method, expect the withholding line to look more aggressive than a flat 22% mental model. If the result still looks far outside the expected range, payroll can explain which method was applied and whether any state-specific supplemental wage rule also affected the check.
Run the bonus tax calculator, review our CPA-verified withholding methodology, and browse all paycheck research → for more withholding explainers.
Frequently Asked Questions
A bonus usually uses supplemental wage withholding rules, not your normal paycheck formula. The common 22% federal withholding rate can look heavy compared with a regular payroll run, even though your final tax is reconciled when you file.
Not necessarily. The 22% figure is usually a withholding rule for many bonuses, not your final tax rate. Your actual tax depends on your full-year income, deductions, and credits.
Model the bonus together with salary, filing status, and state withholding rules. That shows whether the bonus is likely to be over-withheld or under-withheld compared with your final annual tax result.
See also: signing bonus taxes →
This article provides general information, not tax advice. Consult a qualified CPA for your specific situation.