Getting a bonus or commission is exciting—until you see how much was withheld for taxes. If you’ve ever looked at your bonus check and thought, “Where did half of it go?”, you’re not alone. Understanding how bonuses and commissions are taxed is the key to avoiding unpleasant surprises and planning your finances effectively.
In this comprehensive guide, we break down everything you need to know about supplemental wage taxation in 2026, including the two IRS withholding methods, FICA taxes, state tax implications, and real-world examples—all backed by the latest IRS Publication 15 guidelines.
What Are Supplemental Wages?
The IRS defines supplemental wages as compensation paid in addition to an employee’s regular wages. They include a wide range of payments:
- Bonuses — sign-on bonuses, performance bonuses, holiday bonuses, referral bonuses
- Commissions — sales commissions and overrides
- Overtime pay — when paid separately from regular wages
- Tips — reported tips of $20 or more per month
- Severance pay — compensation upon termination
- Vacation pay — when paid separately from regular wages
- Awards and prizes — employee achievement awards, contest winnings
- Back pay — wages paid for prior periods
- Accumulated sick leave — paid out upon separation
The key distinction? Supplemental wages are not part of your regular payroll. They’re extra, which means the IRS treats them differently for withholding purposes.
How Are Bonuses Taxed? The Two IRS Methods
The IRS allows employers to choose between two methods for withholding federal income tax on supplemental wages. Which method is used can significantly impact your take-home bonus amount.
Method 1: The Percentage Method (Flat 22% Rate)
This is the most common method and the simplest. The employer withholds a flat 22% for federal income tax on bonus payments up to $1 million. For any amount above $1 million, the rate increases to 37%.
Key requirements for the Percentage Method:
- The bonus must be paid separately from regular wages
- Or the bonus must be identified separately in the payroll system
- The employer may use this method regardless of the employee’s W-4 elections
The 22% flat rate has been in effect since 2018 and remains unchanged for 2026 under current tax law (Tax Cuts and Jobs Act provisions).
Method 2: The Aggregate Method
Under the aggregate method, the employer combines the bonus with regular wages and withholds tax based on your total pay for that period and your W-4 elections. Because the bonus can push you into a higher tax bracket for that paycheck, this method often results in higher withholding than the 22% flat rate.
How it works:
- Your regular wages for the pay period are calculated
- The bonus amount is added on top
- Tax is withheld on the total combined amount using the IRS tax tables
- The employer subtracts what was already withheld from your regular paycheck
- The difference is the tax withheld from the bonus
When the Aggregate Method is required:
- When the bonus is paid together with regular wages and not separately identified
- When the employer chooses not to use the percentage method
Which Method Results in Higher Withholding?
It depends on your income level:
| Your Annual Income | Percentage Method (22% flat) | Aggregate Method |
|---|---|---|
| Under $50,000 | ✅ Higher withholding (22% vs ~12% marginal rate) | Lower withholding |
| $50,000 – $100,000 | ⚠️ Similar (22% vs 22% marginal rate) | Similar |
| Over $100,000 | ✅ Lower withholding (22% vs 24%+ marginal rate) | Higher withholding |
| Over $200,000 | ✅ Significantly lower (22% vs 32%+ marginal rate) | Much higher withholding |
💡 Key insight: If you’re in a lower tax bracket (under $50K/year), the 22% flat rate may actually over-withhold—you’ll get the excess back when you file your tax return. If you’re in a higher bracket, the flat rate likely under-withholds, meaning you may owe additional tax at filing time.
FICA Taxes on Bonuses and Commissions
Beyond federal income tax, bonuses and commissions are also subject to FICA taxes (Social Security and Medicare). These are not optional and apply at the same rates as regular wages.
| Tax Type | Rate | Annual Limit (2026) |
|---|---|---|
| Social Security (employee share) | 6.2% | Up to ~$180,000 in wages |
| Medicare (employee share) | 1.45% | No limit |
| Additional Medicare Tax | 0.9% | Over $200,000 (single) / $250,000 (married joint) |
| Total FICA (typical) | 7.65% | Up to the Social Security wage base |
Important: Once your total wages (including bonuses) exceed the Social Security wage base limit (~$180,000 in 2026), you stop paying the 6.2% Social Security portion for the remainder of the year. However, the 1.45% Medicare tax continues on all wages with no upper limit.
Real-World Examples: How Bonus Taxation Works
Example 1: $5,000 Bonus Using the Percentage Method
Sarah earns $60,000/year as a marketing manager and receives a $5,000 performance bonus paid separately. Her employer uses the percentage method.
| Item | Amount |
|---|---|
| Bonus amount | $5,000.00 |
| Federal income tax (22%) | -$1,100.00 |
| Social Security (6.2%) | -$310.00 |
| Medicare (1.45%) | -$72.50 |
| Total withholding | -$1,482.50 (29.7%) |
| Net bonus received | $3,517.50 |
Sarah’s effective tax rate on her bonus is 29.7%, not 22%, because of FICA taxes. If her state also taxes supplemental wages, the net amount will be even lower.
Example 2: $15,000 Commission Using the Aggregate Method
David earns $120,000/year as a sales representative. He receives a $15,000 commission paid together with his regular biweekly paycheck ($4,615). His employer uses the aggregate method.
With the aggregate method, the IRS treats David’s total $19,615 paycheck as if that’s his regular pay rate, pushing him into a much higher withholding bracket. This results in approximately 28-30% federal withholding on the combined amount, compared to 22% if the commission were paid separately.
The result: David takes home less from his commission than if the percentage method were used. However, when he files his annual tax return, the excess withholding is refunded as a tax credit.
Example 3: $50,000 Executive Bonus (Over $1 Million Rule)
Jennifer is a senior executive earning $500,000/year. She receives a $50,000 bonus on top of her regular pay. Since her bonus is under $1 million, federal withholding is at 22% ($11,000).
If Jennifer received a $2 million bonus, the first $1 million would be taxed at 22% ($220,000), and the remaining $1 million at 37% ($370,000), for total federal withholding of $590,000.
State Income Tax on Bonuses
State taxes also apply to bonuses and commissions. The rules vary significantly:
- No state income tax (9 states): Alaska, Florida, Nevada, New Hampshire (interest/dividends only), South Dakota, Tennessee, Texas, Washington, Wyoming — your bonus won’t be taxed at the state level
- Flat-rate states: Colorado (4.4%), Illinois (4.95%), Indiana (3.15%), Kentucky (4%), Massachusetts (5%), Michigan (4.25%), North Carolina (4.5%), Pennsylvania (3.07%), Utah (4.55%) — these states apply their flat rate to all income, including bonuses
- Progressive states: California (up to 13.3%), New York (up to 10.9%), Hawaii (up to 11%), New Jersey (up to 10.75%), Oregon (up to 9.9%) — bonuses are added to your annual income and taxed at your marginal state rate
How Commissions Are Taxed
Commissions are treated identically to bonuses under IRS rules—they are supplemental wages. The same two methods (percentage or aggregate) apply. However, commissions are often paid more frequently than bonuses, which can affect withholding calculations:
- Paid monthly/quota-based commissions: Often paid separately using the 22% flat rate
- Commissions combined with regular pay: Typically use the aggregate method
- Advance commissions: May be treated as a loan and taxed differently
- Deferred commissions: Taxed when received, not when earned
How Bonuses Affect Your Annual Tax Bracket
A common misconception is that a large bonus pushes your entire income into a higher tax bracket. This is not how marginal tax brackets work in the United States.
The U.S. uses a progressive tax system. Only the portion of your income that falls within each bracket is taxed at that rate. A bonus increases your total income, so only the bonus dollars that fall into a higher bracket are taxed at the higher rate—not your existing income.
2026 Federal Income Tax Brackets (Single Filer):
| Tax Rate | Income Range |
|---|---|
| 10% | $0 – $11,925 |
| 12% | $11,926 – $48,475 |
| 22% | $48,476 – $103,350 |
| 24% | $103,351 – $197,300 |
| 32% | $197,301 – $250,525 |
| 35% | $250,526 – $626,350 |
| 37% | $626,351+ |
For example, if you earn $80,000 and receive a $20,000 bonus, your total income becomes $100,000. The $20,000 bonus is taxed at your marginal rates: part at 22% and part at 24%—not at a flat punitive rate.
Tips to Avoid Surprises at Tax Time
- Check your withholding method. Ask your payroll department whether they use the percentage method (22% flat) or aggregate method on bonuses.
- Use the IRS Tax Withholding Estimator. After receiving a large bonus, run the numbers on the IRS website to see if you need to adjust your W-4.
- Increase retirement contributions. Contributions to a 401(k) or traditional IRA reduce your taxable income, lowering the tax impact of bonuses.
- Consider deferring bonuses. If your employer allows it, deferring a bonus to a lower-income year can reduce your tax burden.
- Plan for estimated taxes. If your bonus pushes your total withholding below 90% of your annual tax liability, you may need to make estimated tax payments to avoid penalties.
- Use our salary calculator. Our free salary calculator can help you convert annual figures and understand your take-home pay across different scenarios.
Frequently Asked Questions
Are bonuses taxed at 22% or 40%?
Bonuses are taxed at a flat 22% federal withholding rate when paid separately (percentage method). The effective rate is higher when you include FICA taxes (7.65%), bringing the total to approximately 29.65% for most employees, plus state taxes. Bonuses above $1 million are taxed at 37% on the excess.
Why is my bonus taxed so high?
If your employer uses the aggregate method, the bonus is combined with your regular wages, which can push you into a higher withholding bracket for that paycheck. Also, FICA taxes (Social Security and Medicare) add 7.65% on top of federal income tax, making the total withholding appear higher than you might expect.
Do I get bonus taxes back at tax time?
Yes, potentially. When you file your annual tax return, your total tax liability is calculated on your full-year income. If the 22% flat withholding on your bonus exceeds your actual marginal tax rate, you’ll receive a refund for the difference. Conversely, if you’re in a higher bracket, you may owe additional tax.
Are commissions taxed differently than bonuses?
No. The IRS treats commissions identically to bonuses—both are supplemental wages subject to the same two withholding methods (22% flat rate or aggregate method). The rules for FICA taxes also apply equally.
How can I reduce taxes on my bonus?
You can reduce the tax impact of your bonus by: (1) increasing 401(k) contributions to reduce taxable income, (2) deferring the bonus to a lower-income year, (3) adjusting your W-4 to account for the bonus withholding, or (4) contributing to a Health Savings Account (HSA) if eligible.
What is the bonus tax rate for 2026?
The federal bonus tax rate remains 22% for 2026 under the percentage method (same as 2025). The Social Security wage base limit is approximately $180,000 for 2026 (adjusted annually for inflation). State bonus tax rates vary by state.
Conclusion: Knowledge Is the Key to Better Bonus Planning
Understanding how bonuses and commissions are taxed empowers you to plan better, negotiate smarter, and avoid unpleasant surprises. The key takeaways:
- ✅ Supplemental wages include bonuses, commissions, tips, severance, and many other extra payments
- ✅ The federal withholding rate is either 22% flat (percentage method) or based on your tax bracket (aggregate method)
- ✅ FICA taxes add 7.65% on top (6.2% Social Security + 1.45% Medicare)
- ✅ State taxes vary from 0% to over 13% depending on where you live
- ✅ Any over-withholding is refunded when you file your annual tax return
Ready to run your own numbers? Use our free salary calculator to convert between hourly, weekly, monthly, and annual pay—and see how bonuses and commissions add up. For more insights, check out our guide on understanding overtime pay and our salary negotiation guide.
Disclaimer: This article is for informational purposes only and does not constitute tax advice. Tax laws are complex and subject to change. Consult a qualified tax professional for advice specific to your situation.
About the Author
Lin Xiaoqin is a salary researcher and personal finance enthusiast. He founded SalaryCalc.me to help workers understand their true earning power. He has been analyzing compensation structures, tax systems, and labor market data since 2020. His guides are based on official sources including the U.S. Bureau of Labor Statistics, Department of Labor, and IRS publications.
Disclaimer: This article is for informational purposes only and does not constitute financial or legal advice. Rates and laws may change. Please consult official government sources for the most current information. Last updated: June 2026.