How Bonuses Are Taxed in 2026: Supplemental Withholding vs. Actual Tax
It is one of the most common workplace complaints: "I earned a $5,000 bonus, but after taxes, I only took home $3,000. Why are bonuses taxed at 40%?" Here is the truth behind bonus taxation and IRS supplemental wage rules.
Withholding is not the tax you owe
First and foremost: There is no separate federal income tax bracket for a bonus. A bonus adds to annual income and may fall within a higher marginal bracket.
Bonuses generally count as ordinary wage income on Form 1040. Specific deductions for qualifying tips or overtime do not make every wage payment tax-free. When you file your annual tax return, your total gross earnings are combined, deductions are subtracted, and your federal income tax is calculated using marginal brackets, applicable deductions, and credits.
So why did your bonus check look so depleted? Because of tax withholding rules, not your actual tax rate. The IRS requires employers to use special supplemental withholding rules when paying bonuses.
The two bonus withholding methods
Under IRS Publication 15 (Circular E), employers have two options for calculating federal income tax withholding on supplemental wages:
Method 1: the percentage method (flat 22% withholding)
When an employer pays your bonus separately from your regular paycheck (or itemizes it separately on your pay stub), they may use flat 22% federal income tax withholding on supplemental wages up to $1 million if income tax was withheld from regular wages in the current or previous calendar year. The excess over $1 million is subject to the highest-rate method.
- Federal Income Tax (flat 22%): $1,100.00
- Social Security Tax (6.2%): $310.00
- Medicare Tax (1.45%): $72.50
- Total Federal Statutory Withholding (29.65%): $1,482.50
- Estimated State Tax (e.g. 5% state withholding): $250.00
- Net take-home bonus check: $3,267.50 (roughly 65.35% net)
You can verify this calculation on our Bonus Tax Calculator.
Method 2: the aggregate method
If your employer combines your bonus and your regular biweekly wages into a single lump-sum check without identifying the bonus portion, they must use the aggregate withholding method.
Under the aggregate method, payroll software calculates tax as if you earn that combined amount every single pay period of the year. For instance, if your normal biweekly pay is $3,000 and you receive a $5,000 bonus on the same check ($8,000 total), the payroll system calculates withholding as if your annual salary is $208,000 ($8,000 × 26 checks).
This temporarily pushes your paycheck into higher marginal withholding brackets (24% or 32%), withholding substantially more tax on that single check.
What happens to the withheld money?
Withholding is merely an advance deposit toward your estimated annual tax bill. When you file your tax return at the end of the year:
- If too much was withheld: A refund arises if your total withholding and other payments exceed your final tax liability after credits. A bonus withholding rate alone does not determine whether you receive a refund.
- If too little was withheld: If you are a high earner sitting in the 24%, 32%, or 35% federal bracket, the 22% flat withholding on your bonus was actually less than your true marginal rate. You may owe additional tax when filing.
State supplemental tax rates
In addition to 22% federal withholding and 7.65% FICA, states enforce their own supplemental withholding schedules:
- 0% supplemental states: Texas, Florida, Washington, Nevada, Tennessee, Alaska, South Dakota, and Wyoming have zero state income tax withholding on bonuses.
- California: Provides a percentage method for separately identified supplemental wages, with different rates for bonuses and other payments. SDI can also apply. Check the current EDD withholding schedules.
- New York: Has state supplemental withholding rules and separate city schedules where applicable. State and city withholding rates differ from final marginal tax rates.
Ways to reduce withholding on a bonus
If you anticipate a significant bonus, consider these legitimate strategies:
- Increase your 401(k) contribution for the bonus pay period: Many corporate 401(k) plans allow you to set a separate deferral percentage (e.g. 50% or 75%) specifically for bonus payouts. Directing bonus dollars directly into your traditional 401(k) shields them from both federal and state income taxes up to the annual IRS elective deferral limit.
- Fund your HSA: Contributing a portion of your bonus into a Health Savings Account may reduce federal taxable income if you are eligible. FICA savings generally require employer cafeteria-plan payroll contributions; a direct contribution does not refund payroll taxes. State treatment varies.
- Adjust Form W-4 in advance: If you know the aggregate method will dramatically over-withhold on an upcoming bonus, use the IRS Tax Withholding Estimator and submit an accurate W-4. Do not claim deductions you cannot support. Changes to W-4 may not change an employer's flat supplemental withholding method.