TAXES 19-22, Mississippi State Income Tax Withholding

Published: March 8, 2019
Effective: Pay Period 03, 2019


The income tax withholding formula for the State of Mississippi includes the following changes:

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:

89-350-15-8-1-000 (Rev. 05/15)

Basis for Withholding:

Three-digit number from special coding & Federal marital status (use Federal Standard Deduction)

Acceptable Exemption Data:

Three digits from special coding

TSP Deferred:


Special Coding:

Determine the Exemption Data field as follows:
Divide the dollar amount in Item 6 of the State certificate by 100. Multiply the result by 2. (Examples are 120 for $6,000; 190 for $9,500, and 240 for $12,000.)

Additional Information:


Withholding Formula (Effective Pay Period 03, 2019)

  1. Subtract the nontaxable biweekly Thrift Savings Plan (TSP) 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 the taxable biweekly fringe benefits (e.g., taxable life insurance) to the amount computed in step 2 to obtain 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 guideline and subtract this amount from the gross annual wages to compute the taxable income:


    If the Employee Is:

    The Standard Deduction Is:





    Head of Household


    Married (Both Spouses Working)



  6. Subtract the employee-specified personal exemption amount based on special coding.

    Note: The exemption allowance is the "Total Amount of Exemption Claimed" entered in Item 6 on the Mississippi tax withholding Form 89-350-15-8-1-000 (Rev 07/2018).

  7. Apply the taxable income in step 6 to the following table to determine the annual Mississippi tax withholding:

    Tax Withholding Table

    If the Amount of Taxable Income Is:

    The Amount of Mississippi Tax Withholding Should Be:

    Over $0 but not over $2,000


    Over $2,000 but not over $5,000

    $0.00 plus 3.00% of excess over $2,000

    Over $5,000 but not over $10,000

    $90.00 plus 4.00% of excess over $5,000

    Over $10,000

    $290.00 plus 5.00% of excess over $10,000


  8. Divide the annual Mississippi tax withholding calculated in step 7 by the number of pay dates in the tax year and round to the nearest dollar to obtain the biweekly Mississippi tax withholding.
  9. Add the additional amount or percentage elected by the employee to the pay period tax calculated in step 8 and round to the nearest dollar to determine the amount of tax to be withheld for the pay period.


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


For questions about NFC processing, authorized Servicing Personnel Office representatives should contact the NFC Contact Center at 1-855-NFC-4GOV (1-855-632-4468) or via the customer service portal.