TAXES 18-12, Kentucky State Income Tax Withholding

Published: January 26, 2018
Effective: Pay Period 01, 2018


The annual standard deduction will increase from $2,480 to $2,530 for the State of Kentucky. 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:

0/Number of Exemptions

TSP Deferred:


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 exemptions claimed.

Additional Information:


Withholding Formula (Effective Pay Period 01, 2018)

  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 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. Subtract the standard deduction of $2,530 from the result of step 4 to compute the taxable income.
  6. Apply the taxable income computed in step 5 to the following table to determine the annual Kentucky tax withholding:

    Tax Withholding Table

    If the Amount of Taxable Income Is:

    The Amount of Kentucky Tax Withholding Should Be:

    Over $0 but not over $3,000


    Over $3,000 but not over $4,000

    $60.00 plus 3.0% of excess over $3,000

    Over $4,000 but not over $5,000

    $90.00 plus 4.0% of excess over $4,000

    Over $5,000 but not over $8,000

    $130.00 plus 5.0% of excess over $5,000

    Over $8,000 but not over $75,000

    $280.00 plus 5.8% of excess over $8,000

    Over $75,000

    $4,166.00 plus 6.0% of excess over $75,000

  7. Determine the exemption allowance by applying the following guideline and subtract this amount from the result of step 6 to compute the annual Kentucky tax withholding:

    Exemption Allowance = $10 x Number of Exemptions

  8. Divide the annual Kentucky tax withholding calculated in step 7 by the number of pay dates in the tax year to obtain the biweekly Kentucky 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.


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.