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How to Calculate 2022 Illinois State Income Tax by Using State Income Tax Table

1. Find your income exemptions

2. Find your pretax deductions, including 401K, flexible account contributions ...

3. Find your gross income

4. Check the 2022 Illinois state tax rate and the rules to calculate state income tax

5. Calculate your state income tax step by step

6. If you want to simplify payroll tax calculations, you can download ezPaycheck payroll software, which can calculate federal tax, state tax, Medicare tax, Social Security Tax and other taxes for you automatically. You can try it free for 30 days, with no obligation and no credt card needed.

Learn more about the in house payroll tax solution for Illinois small businesses here.
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Illinois State Tax Tables


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2024 Illinois State Tax Witholding Table
2023 Illinois State Tax Witholding Table
2022 Illinois State Tax Witholding Table
2021 Illinois State Tax Witholding Table
2020 Illinois State Tax Witholding Table
( 2019   2018   2017   2016   2015   )

Tax rate used in calculating Illinois state tax for year 2022

State Abbreviation:

IL

State Tax Withholding State Code:

17

Acceptable Exemption Form:

IL-W-4

Basis For Withholding:

State Exemptions

Acceptable Exemption Data:

0 / Number of Regular Allowances / Number of Additional Exemptions

TSP Deferred:

Yes

Special Coding:

Determine the Total Number Of Allowances field as follows:
First Position - Enter 0 (zero).
Second and Third Positions - Enter the number of exemptions claimed.

Determine the Additional Exemptions Claimed field as follows:
First and Second Positions - Enter the number of additional allowances claimed on Line 2 of the IL-W-4. Valid values are 00 through 99. If no allowances are claimed, enter 00.

Additional Information:

None


Withholding Formula (Illinois Effective 2022)
  1. Subtract the biweekly Thrift Savings Plan contribution from the gross biweekly wages.

  2. Multiply the adjusted gross biweekly wages times 26 to obtain the annual wages.

  3. Determine the exemption allowance by applying the following guideline and subtract this amount from the annual wages.

    Exemption Allowance = $2,425 x Number of Exemptions

  4. Determine the additional allowance by applying the following guideline and subtract this amount from step 3 to compute the taxable income.

    Additional Allowance = $1,000 x Number of Additional Exemptions

  5. Multiply the taxable income computed in step 4 times 4.95 percent to determine the amount of Illinois tax withholding.

  6. Divide the annual Illinois tax withholding by 26 to obtain the biweekly Illinois tax withholding.

More Payroll Information for Illinois Small Business

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