Bonus tax calculator Illinois
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  • 1

    Pay Details

  • 2

    Exemptions

  • 3

    Federal Information

  • 4

    State Information

  • 5

    Locale Information

  • 6

    Voluntary Deductions

  • 7

    Calculate Paycheck

Calculate a flat bonus for your employee in seconds

Our flat bonus calculator can help you find the correct amount of federal and state taxes to withhold in a few clicks. Simply click the button below, enter your employee’s gross bonus amount on the next page, and we’ll do the work.

How much did your employee earn?

Bonus: Enter the total bonus pay your employee has earned this year. This is the amount of their bonus before taxes and deductions are withheld.

Gross Pay YTD: Enter the total gross pay your employee has earned this year, prior to this paycheck. Normally, this can be found on the last pay stub.

Check Date: Enter the check date that should appear on your paycheck.

Is your employee exempt from any taxes?

Federal: In some cases, public and governmental employees are exempt from federal taxes. Check “yes” if your employee is exempt and Federal taxes should not be deducted.

FICA: In some cases, public and governmental employees are exempt from FICA. Check “yes” if your employee is exempt and FICA taxes should not be deducted.

Medicare: In some cases, public and governmental employees are exempt from Medicare taxes. Check “yes” if your employee is exempt and Medicare taxes should not be deducted.

Please enter your employee’s withholding information.

Additional Federal Withholding: If your employee has asked to have additional funds withheld from each paycheck, enter the amount here. If they have not, enter “0”.

Round Federal Withholding: Would you like us to round your employee’s withholding totals to the nearest dollar? (It’s not required, but it is permitted)

Now, add information for their state.

State: Select the state where withholding should be calculated. It should be the same state where the work was performed.

Now, add locale information if applicable.

Does your employee have any voluntary deductions?

Please add any additional deductions for items like health insurance, 401(k), HSAs/FSAs, or any other benefits.


Select type of deduction needed:

401(k)

Add deduction

HSA

Add deduction

Custom

Add deduction

Let’s finish crunching the numbers!

Click the button below to see your paycheck calculated.

Here’s your paycheck information:

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Updated: July 8, 2025

The Illinois bonus tax calculator at the top of this page helps employers quickly estimate the net (take-home) pay employees should receive for bonus payments, using the state’s flat income tax rate.

Does Illinois tax bonuses?

Yes. Illinois applies a flat income tax rate on all wages, including bonuses. Keep in mind that withholding also applies to commissions and other supplemental compensation, including vacation pay that’s paid in addition to regular wages for the vacation period.

How to calculate bonus tax in Illinois

Apply the state’s flat withholding rate of 4.95% to any bonus, in addition to the 22% federal rate. You can use the calculator at the top of this page to do this for you also.

 

How can employers in Illinois pay bonuses to employees?

Bonuses can be paid via:

  • Check
  • Direct deposit
  • Pay card
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Why are bonuses taxed differently than standard pay?

In Illinois, they’re not — the same rate applies to regular and supplemental wages.

 

How much tax is taken out of a bonus in Illinois?

Here are the percentages you’ll want to pay attention to:

  • 4.95% state + 22% federal = 26.95%, plus other deductions as applicable.

Information for Illinois employers and employees

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