How Are Bonuses Taxed in 2026? Supplemental Withholding, Estimated Tax, and Avoiding a Surprise Bill
A bonus can make one paycheck look unusually heavily taxed, but that does not necessarily mean the bonus is taxed at a special final rate. In 2026, the IRS treats bonuses as supplemental wages. Employers apply federal withholding rules when paying them, while your actual income tax is calculated later using your total annual income, deductions, filing status, and tax credits.
For many separately identified bonuses, employers withhold federal income tax at 22%. Supplemental wages exceeding $1 million during the calendar year are generally subject to 37% federal withholding on the excess. Social Security, Medicare, state, and local taxes may also reduce the payment.
The essential distinction is that withholding is a tax prepayment. It is not necessarily the amount you ultimately owe on the bonus.
Bonus Taxes in 2026: The Short Answer
Cash bonuses, performance awards, commissions, signing bonuses, and similar payments generally count as taxable compensation. They are normally reported with your other wages on Form W-2 rather than treated as tax-free windfalls.
- Federal income tax withholding: Commonly 22% on separately paid supplemental wages up to $1 million.
- Large supplemental payments: Generally 37% must be withheld from the portion of annual supplemental wages exceeding $1 million.
- Social Security tax: Usually 6.2% until the employee reaches the annual Social Security wage base.
- Medicare tax: Generally 1.45% on covered wages, with no overall wage cap.
- Additional Medicare Tax: Employers withhold an additional 0.9% after an employee’s wages from that employer exceed $200,000 during the calendar year.
- State and local withholding: Rules depend on where the employee lives and works.
Your final federal income tax liability is determined when you file your return. If too little was withheld during the year, you may owe money. If too much was withheld, the excess generally contributes to your refund.
How Federal Bonus Withholding Works
Employers generally calculate federal withholding on bonuses using either the percentage method or the aggregate method. The method used can materially change the net amount of the bonus paycheck, even though it does not change how your final annual income tax is calculated.
The percentage method
When a bonus is separately identified from regular wages and the applicable IRS conditions are met, an employer may withhold federal income tax at the flat supplemental rate. For 2026, that rate is generally 22% for supplemental wages that do not exceed $1 million.
For example, federal income tax withholding on a $5,000 bonus would be:
$5,000 × 22% = $1,100
That $1,100 does not include Social Security, Medicare, state tax, local tax, retirement-plan contributions, or other deductions that may apply.
The aggregate method
Under the aggregate method, the employer combines the bonus with regular wages for a payroll period. It then calculates withholding on the combined amount using the employee’s Form W-4 information and the applicable IRS withholding tables. The withholding attributable to the bonus is generally the difference between withholding on the combined payment and withholding on regular wages alone.
Suppose an employee normally has $300 of federal income tax withheld from a paycheck. After a $5,000 bonus is added, the withholding calculation on the combined payment might increase to $1,700. In that simplified illustration, $1,400 of the combined withholding is attributable to the bonus.
The actual result depends on pay frequency, regular wages, filing status, multiple-job adjustments, dependents, credits, and any additional withholding entered on Form W-4. This is why the aggregate method can make a bonus paycheck appear to be taxed at a high rate. Payroll software effectively treats the larger payment as one payroll-period amount under the withholding tables; it is not calculating the employee’s final annual tax rate.
Bonuses exceeding $1 million
Once an employee’s supplemental wages from an employer exceed $1 million during the calendar year, the employer generally must withhold at 37% on the portion above $1 million. The mandatory rate applies to the excess even if the employee’s ultimate effective tax rate is different.
Social Security, Medicare, and Other Payroll Taxes
Federal income tax withholding is only one deduction from a bonus. Bonuses are also generally subject to Federal Insurance Contributions Act, or FICA, taxes.
Social Security tax
The employee Social Security tax rate is 6.2%, but it applies only until Social Security wages reach the annual limit. The official 2026 Social Security wage base is $184,500.
If an employee’s year-to-date Social Security wages are below the limit, some or all of the bonus may be subject to the 6.2% tax. If the employee has already reached the limit, no additional employee Social Security tax should be withheld from the bonus. If the bonus crosses the limit, tax applies only to the portion below it.
For example, if year-to-date Social Security wages are $182,500 and the employee receives a $5,000 bonus, only $2,000 of that bonus is subject to employee Social Security tax:
$2,000 × 6.2% = $124
Medicare and Additional Medicare Tax
The regular employee Medicare tax is 1.45% of covered wages and has no general wage cap. A $5,000 bonus would therefore ordinarily produce $72.50 of regular Medicare withholding.
An employer must also begin withholding the 0.9% Additional Medicare Tax when wages it pays to an employee exceed $200,000 in a calendar year, regardless of the employee’s filing status.
The employee’s final Additional Medicare Tax liability uses filing-status thresholds: generally $200,000 for single or head-of-household filers, $250,000 for married couples filing jointly, and $125,000 for married people filing separately. Because employer withholding and final liability thresholds do not always match, married couples and employees with multiple jobs may need to review their overall withholding.
Year-to-date wages therefore matter. Two employees receiving identical bonuses can receive different net payments because one has reached the Social Security wage base or Additional Medicare withholding threshold and the other has not.
Why a 22% Withholding Rate May Not Match Your Tax Bill
The 22% supplemental rate is a withholding mechanism, not a separate federal income tax bracket for bonuses. On your federal return, the bonus is generally combined with your other taxable wages and taxed under the ordinary income tax brackets.
A bonus effectively stacks on top of your other income. If your taxable income before the bonus is already near the top of a tax bracket, part of the bonus may fall into the next bracket.
Consider a simplified example in which a taxpayer has $95,000 of taxable income before receiving a $20,000 bonus, and the next marginal bracket begins at $100,000. The first $5,000 of the bonus would fill the remaining space in the lower bracket, while the other $15,000 would fall into the higher bracket. This is a conceptual illustration, not a statement of the actual 2026 bracket threshold for a particular filing status.
Three rates are important:
- Withholding rate: The percentage the employer sends to the government as a tax prepayment.
- Marginal tax rate: The rate applied to the taxpayer’s next dollar of taxable income.
- Effective tax rate: Total income tax divided by taxable income, which is normally lower than the top marginal rate.
A taxpayer whose bonus dollars fall partly in the 32% or 35% bracket could have insufficient federal withholding if only 22% was withheld. Conversely, someone whose final federal tax attributable to the bonus is below 22% may have overpaid and could receive the difference through a larger refund, depending on the rest of the return.
State and Local Taxes on Bonuses
State treatment varies widely. A state may treat bonuses like ordinary wages, prescribe a separate supplemental-wage withholding rate, allow employers to choose between methods, or impose no individual income tax on wages. A separately stated withholding rule does not necessarily mean the state applies a special final tax rate to bonus income.
City, county, school-district, or other local income taxes may also apply. Employees who live in one jurisdiction and work in another can face additional withholding or tax-credit considerations.
Do not estimate a net bonus using the 22% federal rate alone. Check:
- Your state revenue or taxation department’s current payroll guidance.
- Your employer’s payroll documentation.
- Your bonus pay stub and year-to-date withholding totals.
- Applicable city or local earned-income tax rules.
Examples in this article use a state-and-local-tax placeholder because there is no accurate national rate.
Estimated Tax, Form W-4, and Avoiding a Surprise Bill
After receiving or confirming a substantial bonus, estimate your full-year income and withholding rather than judging the result from one pay stub.
Use the IRS Tax Withholding Estimator
The IRS Tax Withholding Estimator can help employees compare projected federal tax with expected withholding. Gather recent pay stubs for both spouses, information about other income, and the prior year’s tax return before using it.
Consider updating Form W-4
If the bonus materially changes projected income, an employee can submit a revised Form W-4. One practical option is to request an additional fixed-dollar amount from each remaining paycheck. Dividing an anticipated shortfall by the number of pay periods left in the year provides a starting point.
For example, if projected withholding is $3,000 short and six paychecks remain, requesting an additional $500 from each check would address that projected gap. Recalculate if income, deductions, credits, or household withholding changes.
Know the estimated-tax safe harbors
Taxpayers can sometimes avoid federal underpayment penalties by paying enough during the year through withholding and timely estimated payments. The general safe harbor is based on paying at least 90% of the current year’s tax or 100% of the prior year’s tax, whichever applicable target is lower. The prior-year percentage generally increases to 110% when prior-year adjusted gross income exceeded $150,000, or $75,000 for married filing separately.
Timing matters. A large payment made late in the year does not automatically erase an earlier underpayment, although federal wage withholding is generally treated as paid evenly throughout the year. The annualized-income installment method may help when income was earned unevenly. Consult a qualified tax professional when the bonus is unusually large, income is variable, or multiple tax jurisdictions are involved.
Self-employed people do not use employee bonus-withholding rules for additional business profit. They generally account for income tax and self-employment tax through quarterly estimated payments.
Bonus Tax Examples
Example 1: $5,000 bonus using the percentage method
Assume the employee is below the 2026 Social Security wage base, has not crossed the Additional Medicare threshold, and has no pre-tax deductions from the bonus.
- Gross bonus: $5,000
- Federal income tax withholding at 22%: $1,100
- Employee Social Security tax at 6.2%: $310
- Employee Medicare tax at 1.45%: $72.50
- Total listed federal withholding: $1,482.50
- Amount remaining before state, local, and other deductions: $3,517.50
The actual deposit may be lower after state withholding, local tax, retirement contributions, or benefit deductions.
Example 2: The same bonus using the aggregate method
Suppose regular-pay withholding would be $300, while withholding on the combined regular paycheck and bonus is $1,700. The federal withholding attributable to the bonus would be $1,400, not $1,100. Payroll taxes and state or local withholding would still need to be added.
This does not establish that the employee owes $1,400 of final federal tax on the bonus. It only shows how the employer’s payroll calculation can produce a different paycheck result.
Example 3: $1.5 million in supplemental wages
For a simplified percentage-method illustration, assume the employee receives $1.5 million of supplemental wages during the year:
- First $1 million at 22%: $220,000
- Remaining $500,000 at 37%: $185,000
- Total federal income tax withholding: $405,000
Medicare and Additional Medicare Tax withholding would also apply. Social Security tax would apply only to wages within the annual wage base. State and local taxes could be substantial, and the employee’s final federal liability may differ from the $405,000 withheld.
Practical Bonus Tax Checklist
- Confirm the gross bonus and expected payment date.
- Ask whether payroll will use the percentage or aggregate method.
- Inspect the pay stub instead of relying only on the bank deposit.
- Check year-to-date Social Security and Medicare wages.
- Review federal, state, and local withholding separately.
- Estimate total annual household income, deductions, and credits.
- Use the IRS estimator after a material income change.
- Adjust Form W-4 or make an estimated payment if appropriate.
- Keep the final pay stub and Form W-2 for tax filing.
What to Do Next
Before spending the entire bonus, reserve enough cash to cover a possible tax shortfall. Review the bonus pay stub, project your annual liability, and adjust future withholding if the current amount appears inadequate. For a very large bonus or an income year with major changes, ask a credentialed tax professional to evaluate estimated-payment timing and safe-harbor protection.
This article provides general educational information and is not individualized tax, financial, or legal advice.