TAXES 18-43, Wisconsin State Income Tax Withholding

Published: March 21, 2018
Effective: Pay Period 07, 2014


This tax bulletin is being updated to remove the number of pay periods in steps 4 and 8 and replace with the phrase "number of pay dates in the tax year," thereby preventing any confusion in future years. All other information in this bulletin remains the same.

No action on the part of the employee or the personnel office is necessary.

Tax Formula

State Abbreviation:


State Tax Withholding State Code:


Acceptable Exemption Form:


Basis for Withholding:

State Exemptions

Acceptable Exemption Data:

S/M, Number of Exemptions

TSP Deferred:


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; M = Married.


Second and Third Positions - Enter the number of allowances claimed. If less than 10, precede with a 0 (zero).

Additional Information:



Withholding Formula (Effective Pay Period 07, 2014)

  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 dental and vision insurance program and Flexible Spending Account - health care and dependent care deductions) from the amount computed in step 1.
  3. Add taxable fringe benefits (i.e., taxable life insurance) to the adjusted gross biweekly wages.
  4. Multiply the adjusted gross biweekly wages by the number of pay dates in the tax year to obtain the gross annual wages.
  5. Determine the standard deduction by applying the following guidelines and subtract this amount from the annual wages:

    If the Employee Is Single and Annual Wages Are:

    Then the Standard Deduction Is:

    Over $0 but not over $15,200


    Over $15,200 but not over $62,950

    $5,730 - 12% x (Annual Wage - $15,200)

    Over $62,950



    If the Employee Is Married and Annual Wages are:

    Then the Standard Deduction Is:

    Over $0 but not over $21,400


    Over $21,400 but not over $60,750

    $7,870 - 20% x (Annual Wage - $21,400)

    Over $60,750



  6. Apply the following guidelines to determine the exemption allowance and subtract this amount from the results in step 3:

    Exemption Allowance = $400.00 x Number of Exemptions

  7. Apply the taxable income computed in step 4 to the following table to determine the Wisconsin tax withholding.

    If the Taxable Wages Are:

    Amount of Tax Is:

    Over $0 but not over $10,910


    Over $10,910 but not over $21,820

    $436.40 plus 5.84% of excess over $10,910

    Over $21,820 but not over $240,190

    $1,073.54 plus 6.27% of excess over $21,820

    Over $240,190

    $14,765.34 plus 7.65% of excess $240,190


  8. Divide the annual Wisconsin tax withholding by the number of pay dates in the tax year to obtain the biweekly Wisconsin tax withholding.


To view the updated tax formula, go to the HR and Payroll Clients page from the MyNFC drop-down menu on the National Finance Center (NFC) homepage. Select the Publications tab and select U.S. Income Tax Formulas from the Publications menu to launch the tax map. Select the desired State from the map provided for the formula.

Previous Tax Bulletin


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