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    How to Calculate 2022 Iowa 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 Iowa 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 downloadezPaycheck 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 computer icon in house payroll tax solution for Iowa small businesses here.
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      IOWA STATE TAX TABLES



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    2026 Iowa State Tax Witholding Table
    2025 Iowa State Tax Witholding Table
    2024 Iowa State Tax Witholding Table
    2023 Iowa State Tax Witholding Table
    2022 Iowa State Tax Witholding Table
    (2021  2020  2019  2018  2017  )

    Tax rate used in calculating Iowa state tax for year 2022

    State Abbreviation:

    IA

    State Tax Withholding State Code:

    19

    Acceptable Exemption Form:

    IA-W4 or W-4

    Basis For Withholding:

    State Exemptions

    Acceptable Exemption Data:

    0 / Number of Allowances

    TSP Deferred:

    Yes

    Special Coding:

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

    Additional Information:

    None


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

    2. Subtract the nontaxable biweekly Federal Health Benefits Plan payment(s) (includes flexible spending account - health care and dependent care deductions) from the amount computed in step 1.

    3. Add the taxable biweekly fringe benefits (taxable life insurance, etc.) to the amount computed in step 2 to obtain the adjusted gross biweekly wages.

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

    5. Multiply the biweekly Federal income tax withholding by 26 to obtain the annual Federal income tax withholding and subtract this amount from the gross annual wages computed in step 4.

    6. Determine the standard deduction by applying the following guideline and subtract this amount from the result of step 5 to compute the taxable income.

      7. If the Number of
      Allowances Claimed Is:

      The Standard
      Deduction Is:

      0 or 1
      $ 2,210
      2 or more
         5,450

    7. Apply the taxable income computed in step 6 to the following table to determine the Iowa tax withholding.

      8. Tax Withholding Table

      If the Amount of
      Taxable Income Is:

      The Amount of Iowa
      Tax Withholding Should Be:


      Over:

      But Not
      Over:

      Of Excess
      Over:

      $        0
      $     1,743
      $        0.00
      plus
      0.33%
      $        0
          1,743
             3,486
               5.75
      plus
      0.67%
          1,743
          3,486
             6,972
             17.43
      plus
      2.25%
          3,486
          6,972
            15,687
             95.87
      plus
      4.14%
          6,972
         15,687
           26,145
           456.67
      plus
      5.63%
        15,687
        26,145
           34,860
           1,045.46
      plus
      5.96%
        26,145
        34,860
           52,290
        1,564.87
      plus
      6.25%
        34,860
        52,290
           78,435
        2,654.25
      plus
      7.44%
        52,290
        78,435
        and over
        4,599.44
      plus
      8.53%
        78,435

    8. Determine the exemption allowance by applying the following guideline and subtract this amount from the result of step 7 to compute the annual Iowa tax withholding.

      9. Exemption Allowance = $40 x Number of Exemptions

    9. Divide the annual Iowa tax withholding by 26 and round to the nearest dollar to obtain the biweekly Iowa tax withholding.
     

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