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How to Calculate 2021 Wisconsin 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 2021 Wisconsin 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 Wisconsin small businesses here.
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Wisconsin State Tax Tables

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2025 Wisconsin State Tax Witholding Table
2024 Wisconsin State Tax Witholding Table
2023 Wisconsin State Tax Witholding Table
2022 Wisconsin State Tax Witholding Table
2021 Wisconsin State Tax Witholding Table
( 2020   2019   2018   2017   2016   )

Tax rate used in calculating Wisconsin state tax for year 2021 after April 1

State Abbreviation:

WI

State Tax Withholding State Code:

55

Acceptable Exemption Form:

WT-4

Basis For Withholding:

State Exemptions

Acceptable Exemption Data:

S, M / Number of Exemptions

TSP Deferred:

Yes

Special Coding:

Determine the Total Number Of Allowances field as follows:
First Position - Enter the employee's marital status indicated on the WT-4. S=Single and M=Married.
Second and Third Positions - Enter the total number of exemptions claimed. If the number is less than 10, precede with a zero.

Additional Information:

None

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Withholding Formula (Wisconsin Effective 2021)
  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. Apply the taxable income determined in step 2 to the following table to determine the Wisconsin tax withholding.



    4. Tax Withholding Table
    Single

    If the Amount of
    Taxable Income Is:

    The Amount of Wisconsin
    Tax Withholding Should Be:


    Over:

    But Not
    Over:

    Of Excess
    Over:

    $        0
    $   5,730
    $    0
     
    0%
    $         0
        5,730
         15,200
    $    0
    plus
    4%
        5,730
        15,200
         16,486
        378.80
    plus
    4.48%
        15,200
        16,486
       26,227
      436.41
    plus
    6.5408%
        16,486
      26,227
       62,950
      1073.55
    plus
    7.0224%
      26,227
      62,950
       240,190
      3,652.39
    plus
    6.27%
      62,950

      240,190

    		  and over 14,765.34 plus 7.65%   240,190


    Married


    If the Amount of
    Taxable Income Is:


    The Amount of     Wisconsin
    Tax Withholding Should Be:


    Over:

    But Not
    Over:

    Of Excess
    Over:

    $        0
    $  7,870
    $      0
    plus
    0.0%
    $       0
        7,870
        18,780
           0
    plus
    4%
       7,870
        18,780
      21,400
         436.40
    plus
    5.84%
       18,780
      21,400
      28,308
         589.41
    plus
    7.008%
     21,400
      28,308
      60,750
      1073.52
    plus
    7.524%
     28,308
      60,750
      240,190
      3,514.46
    plus
    6.27%
     60,750
      240,190
    and over
      14,765.35
    plus
    7.65%
     240,190
     
  4. Multiply the number of withholding exemptions claimed by $22 and subtract the amount from the tax determined in step 3.

  5. Divide the annual Wisconsin tax withholding by 26 to obtain the biweekly Wisconsin tax withholding.

    6. More Payroll Information for Wisconsin Small Business

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