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    How to Calculate 2024 Montana 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 2024 Montana 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 Montana small businesses here.
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    Montana State Tax Tables




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

    Tax rate used in calculating Montana state tax for year 2024

    State Abbreviation:

    MT

    State Tax Withholding State Code:

    30

    Acceptable Exemption Form:

    W-4

    Basis For Withholding:

    State Exemptions

    Acceptable Exemption Data:

    S, M / Number of Exemptions

    TSP Deferred:

    Yes

    Special Coding:

    None

    Additional Information:

    None


    Withholding Formula (Montana Effective 2024)

    1. Subtract the nontaxable 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 by 26 to obtain the annual wages.

    5. Apply the taxable income computed in step 5 to the following table to determine the annual Montana tax withholding.

      6. Tax Withholding Table
      Sigle, Married Filing Seperately, Or Married Filing Joint with Both Spouse Working

      If the Amount of
      Taxable Income Is:

      The Amount of Montana
      Tax Withholding Should Be:


      Over:

      But Not
      Over:

      Of Excess
      Over:

      $           0
      $   14,600
      $       0
      plus
      0%
      $         0
            14,600
         35,100
           0
      plus
      4.7%
          14,600
           35,100
       and over
           964
      plus
      5.9%
        35,100

      Tax Withholding Table
      Married Filing Jointly or Qualifying Widower

      If the Amount of
      Taxable Income Is:

      The Amount of Montana
      Tax Withholding Should Be:


      Over:

      But Not
      Over:

      Of Excess
      Over:

      $           0
      $   29,200
      $       0
      plus
      0%
      $         0
            29,200
         70,200
           0
      plus
      4.7%
          29,200
           70,200
       and over
           1,927
      plus
      5.9%
        70,200

      Tax Withholding Table
      Head of Household

      If the Amount of
      Taxable Income Is:

      The Amount of Montana
      Tax Withholding Should Be:


      Over:

      But Not
      Over:

      Of Excess
      Over:

      $           0
      $   21,900
      $       0
      plus
      0%
      $         0
            21,900
         52,650
           0
      plus
      4.7%
          21,900
           52,650
       and over
           1,445
      plus
      5.9%
        52,650

    6. Divide the annual Montana tax withholding by 26 and round to the nearest dollar to obtain the biweekly Montana tax withholding.

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