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Bonus Tax Calculator
Opening a paycheck to find your bonus taxed at what looks like a brutal rate is one of the most common — and most misunderstood — moments in personal finance. The good news: bonuses aren’t actually taxed at a higher rate than your regular income.
What you’re seeing is withholding, not your final tax bill, and the two can be very different numbers. A Bonus Tax Calculator exists precisely to separate those two ideas: what your employer holds back today, versus what you’ll actually owe when you file.
This guide breaks down exactly how that withholding is calculated for 2026, walks through a real example, and shows you what you can do if too much is coming out of your check.
Quick Takeaways
Supplemental Wages: Bonuses are classified as “supplemental wages” by the IRS official guidelines, taxed under different withholding rules than your regular salary — but not a separate, higher tax.
Percentage Method: The most common approach withholds a flat 22% federal rate on bonuses up to $1 million, and 37% on any amount above $1 million.
Aggregate Method: Combines your bonus with your regular paycheck and withholds based on that larger, combined amount — which often looks like more tax up front.
FICA Taxes: FICA still applies: 6.2% Social Security (up to the wage base) and 1.45% Medicare, same as any paycheck.
Final Liability: The withholding rate is not your tax rate. Your actual liability is settled when you file, based on your total annual income and bracket.
Canadian Rules: In Canada, there’s no separate flat “bonus tax rate” — bonuses are added to your income and withheld using the CRA payroll methods, which approximate your marginal rate.
Last updated: August 2026. This article is educational and does not replace advice from a licensed CPA or tax attorney.
What a Bonus Tax Calculator Actually Solves
The IRS treats bonuses, commissions, severance pay, and certain other irregular payments as supplemental wages — a category with its own withholding rules, separate from the ones used for your regular salary.
That distinction is exactly why bonuses seem to disappear faster than expected: your employer isn’t taxing the bonus more heavily, it’s just withholding differently. A Bonus Tax Calculator does the math both ways — flat-rate withholding and aggregate withholding — so you can see the actual dollar difference before the check ever lands in your account. To analyze your complete annual earnings, feel free to check our detailed paycheck calculator guide.
The Two Withholding Methods
The 22% (or 37%) Percentage Method
This is the method most employers default to because it’s simple to administer. A flat 22% federal rate is withheld from bonuses up to $1 million in a calendar year.
Once your total supplemental wages from one employer exceed $1 million in the year, the excess is withheld at a mandatory 37% — the top individual tax bracket — with no employer discretion, per IRS Publication 15 (Circular E). This 22%/37% structure is unchanged for 2026, since the One Big Beautiful Bill Act permanently locked in the individual rates created by the 2017 Tax Cuts and Jobs Act.
The Aggregate Method
When a bonus is paid alongside your regular wages in the same check, employers generally must use the aggregate method instead. Here, your bonus and regular pay are combined, taxed together as if that combined amount were your normal paycheck for the period, and the tax already withheld from your regular wages is then subtracted out.
Because payroll systems annualize that combined, larger number, this method frequently pushes more of your income into a higher withholding bracket for that pay period. That’s why a bonus paid this way can look far more heavily taxed than one paid separately under the flat 22% rate — even though your year-end tax liability is identical either way. You can explore how brackets change contextually via our income tax brackets breakdown.
How a Bonus Tax Calculator Works: Step-by-Step
Let’s run a bonus tax calculator’s math manually for an employee receiving a $15,000 bonus, paid as a separate check (percentage method), with no other supplemental wages this year and income well under the Social Security wage base.
Step 1 — Apply the federal flat rate (source figure: 22% supplemental wage rate)
$15,000 × 22% = $3,300 federal income tax withheld (calculated)
Step 2 — Apply Social Security tax (source figure: 6.2% rate)
$15,000 × 6.2% = $930 (calculated)
Step 3 — Apply Medicare tax (source figure: 1.45% rate)
$15,000 × 1.45% = $217.50 (calculated)
Step 4 — Add any applicable state withholding
This varies significantly by state — some apply a flat supplemental rate, others tax bonuses at the same rate as regular wages, and a handful of states have no income tax at all. Review your localized rules using our state tax guide.
Step 5 — Total withholding and net bonus
$3,300 + $930 + $217.50 = $4,447.50 withheld (federal + FICA only, before state tax)
$15,000 − $4,447.50 = $10,552.50 net bonus (calculated)
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Remember: the $3,300 federal figure is withholding, not final tax. If this employee’s actual marginal tax bracket is 24%, they’ll owe roughly 2% more on the bonus when they file. If their marginal bracket is 12%, they’ll get the difference back as part of their refund.
Bonus Tax Calculator Results by Bonus Amount (2026)
| Bonus Amount | Federal Withholding (22%) | Social Security (6.2%) | Medicare (1.45%) | Total Withheld* | Net Bonus* |
| $2,000 | $440.00 | $124.00 | $29.00 | $593.00 | $1,407.00 |
| $5,000 | $1,100.00 | $310.00 | $72.50 | $1,482.50 | $3,517.50 |
| $10,000 | $2,200.00 | $620.00 | $145.00 | $2,965.00 | $7,035.00 |
| $15,000 | $3,300.00 | $930.00 | $217.50 | $4,447.50 | $10,552.50 |
| $50,000 | $11,000.00 | $3,100.00 | $725.00 | $14,825.00 | $35,175.00 |
| $1,000,000 | $220,000.00 | Capped near wage base** | $14,500.00 | Varies | Varies |
*Federal + FICA only; state and local withholding are not included and vary by jurisdiction.
Social Security withholding stops once year-to-date wages hit the $184,500 wage base for 2026 — a large bonus can push you past that threshold mid-year.
If You’re in Canada: How Bonuses Are Taxed
There’s no equivalent flat “bonus tax rate” under Canadian rules, so a U.S.-style bonus tax calculator won’t translate directly north of the border. Instead, the Canada Revenue Agency treats a bonus as a lump-sum, non-periodic payment.
Employers are expected to use what’s commonly called the bonus method: tax is calculated on your annual salary plus the bonus using standard payroll tables, tax is calculated again on your annual salary alone, and the difference between the two becomes the amount withheld from the bonus. This approach is designed to approximate your actual marginal rate more closely than simply withholding a flat percentage. CPP and EI deductions still apply to the bonus the same as regular pay, up to their respective annual maximums. For direct documentation, refer to the CRA Official Site.
How to Reduce the Tax Hit on a Bonus
None of these change how much tax you ultimately owe on the bonus — they change when and how it’s taxed:
Increase retirement contributions: Directing part of a bonus into a traditional 401(k) or, in Canada, an RRSP, reduces taxable income for the year it’s received. Read our 401(k) contribution limits guide for details.
Use an HSA if you’re eligible: Contributions reduce taxable income the same way a 401(k) does, with the added benefit of tax-free growth for medical expenses.
Ask about deferral: Some employers allow bonus payments to be pushed into the following calendar year, useful if you expect to be in a lower bracket then.
Adjust your W-4: If your bonus is consistently over-withheld at 22% relative to your real marginal rate, you can fine-tune your regular paycheck withholding via our W-4 withholding calculator.
Run the actual numbers: A quick pass through a bonus tax calculator often shows the “tax hit” is smaller than the shock of seeing a smaller-than-expected deposit might suggest — check your full take-home with our paycheck calculator.
6 Common Bonus Tax Calculator Mistakes
Assuming the 22% withholding rate is your actual tax rate: It’s a withholding estimate; your real liability depends on your total annual income and bracket.
Forgetting FICA applies to bonuses: Social Security and Medicare come out of a bonus exactly as they do from any paycheck, unless you’ve already hit the Social Security wage base for the year.
Not accounting for state tax: Some states mirror the federal flat-rate approach for bonuses, others don’t — skipping this step understates your real withholding.
Confusing the percentage method with the aggregate method: Which one your employer uses changes what’s withheld upfront, not what you owe at filing.
Ignoring the $1 million mandatory 37% threshold: This applies per employer, per calendar year, across all supplemental wages combined — not just a single bonus.
Assuming self-employed or 1099 bonuses follow the same rules: If you’re an independent contractor rather than a W-2 employee, there’s no employer withholding at all — you’ll want our freelance tax calculator instead to estimate what to set aside.
Frequently Asked Questions
Is my bonus really taxed at a higher rate than your salary?
No. The 22% (or 37%) figure is a withholding rate, not a separate, higher tax bracket for bonus income. Your bonus is combined with your other income at tax time and taxed at your actual marginal rate — the withholding is simply a prepayment toward that final number.
Why did my bonus get taxed more than 22%?
This usually happens when your employer uses the aggregate method, combining the bonus with a regular paycheck and withholding based on that larger total for the pay period — or because state and FICA taxes are being added on top of the 22% federal figure.
Do I get back any bonus tax that was over-withheld?
Yes. If your total withholding for the year — including bonus withholding — exceeds your actual tax liability, the difference comes back to you as part of your refund when you file.
Does a signing bonus get taxed differently from a performance bonus?
No. Both are classified as supplemental wages and follow the same withholding rules under IRS guidance, regardless of what the bonus is called or when in the year it’s paid.
How is overtime pay combined with a bonus taxed?
Overtime is also supplemental in some payroll setups, but it’s calculated separately from bonus withholding. If part of your total compensation includes overtime, our overtime calculator guide can help you separate that portion out before estimating your bonus withholding.
Try the Bonus Tax Calculator Now
Manually running the percentage method, the aggregate method, and FICA by hand is doable for a single bonus — but it gets tedious fast if you’re comparing scenarios or trying to figure out what bonus amount would net you a specific take-home number.
Use our interactive Bonus Tax Calculator to get your exact 2026 withholding in seconds, or work backward from a target take-home amount with our net-to-gross calculator.