Bonus Pay Tax Calculator
Estimate how much of your bonus you may keep after federal withholding, payroll taxes (FICA), state tax, and any extra withholding.
What is bonus pay tax?
Bonus pay is usually considered supplemental wages, which means it can be withheld differently from your normal paycheck. A lot of people see a big difference between their gross bonus and what actually lands in their bank account. That is normal: payroll withholding is often conservative, and it includes both federal withholding and payroll taxes.
How this bonus tax calculator works
This calculator gives a practical estimate, not an exact payroll engine. It combines the main pieces of tax withholding that usually affect bonuses.
1) Federal withholding method
- Flat 22% method: commonly used for supplemental wages under IRS guidance.
- Flat 37% method: sometimes used in high-income supplemental wage scenarios.
- Aggregate method: estimates tax impact by comparing annual federal income tax before and after adding the bonus.
2) Payroll taxes (FICA)
- Social Security: 6.2% up to the annual wage base.
- Medicare: 1.45% on all wages.
- Additional Medicare: 0.9% on wages above threshold ($200,000 single / $250,000 married filing jointly).
3) State withholding and additional deductions
You can enter a state percentage and any extra fixed withholding. This helps model real payroll outcomes, especially in states with income tax.
Example bonus withholding scenario
If your bonus is $10,000 and your employer uses the 22% federal supplemental method, your federal withholding starts around $2,200. Then FICA can take several hundred more, and state withholding may apply. It is very common to see net bonus pay around 60% to 75% of gross, depending on your state and income level.
Why your bonus check can feel “over-taxed”
In many cases, it is not actually over-taxed; it is over-withheld. Your final tax liability is settled when you file your return. If too much was withheld during the year, you may get a larger refund (or owe less).
Tips to avoid bonus paycheck surprises
- Estimate net bonus ahead of time using a calculator like this one.
- Check your YTD wages if you are near Social Security or Additional Medicare thresholds.
- Review your Form W-4 and tax planning strategy if your income varies a lot.
- Plan large purchases based on net bonus, not gross bonus.
FAQ
Is bonus income taxed differently from salary?
Generally, bonus income is taxed as ordinary income, but withholding methods can differ from regular payroll calculations.
Will I get some bonus tax back later?
Possibly. If your total withholding for the year exceeds your final tax bill, you may get a refund when filing your return.
Does this calculator include local taxes?
No. It includes federal, FICA, and a custom state withholding input. Local city/county taxes vary and are not included in this estimate.
Disclaimer: This tool is for educational estimates only and is not tax, legal, or payroll advice.