TAXES 18-20, Missouri State Income Tax Withholding
Published: February 13, 2018
Effective: Pay Period 02, 2018
Summary
The income tax withholdings for the State of Missouri will change as follows:
- The annual standard deduction amount for employees claiming Single and Married (Spouse Works) will increase from $6,350 to $6,500.
- The annual standard deduction amount for employees claiming Married (Spouse Does Not Work) will increase from $12,700 to $13,000.
- The annual standard deduction amount for employees claiming Head of Household will increase from $9,350 to $9,550.
- The flat tax rate for supplemental wages will decrease from 6.0 percent to 5.9 percent.
- The tax withholding table will change.
No action on the part of the employee or the personnel office is necessary.
Tax Formula
State Abbreviation: |
MO |
State Tax Withholding State Code: |
29 |
Acceptable Exemption Form: |
MO W-4 |
Basis for Withholding: |
State exemptions and the amount of Federal income tax withheld each pay period. |
Acceptable Exemption Data: |
S/M/N/H, total allowances claimed |
TSP Deferred: |
Yes |
Special Coding: |
Determine the Total Number of Allowances Claimed field as follows: First Position - S = Single; M = Married (One Spouse Working); N = Married (Both Spouses Working); H = Head of Household. Second and Third Positions - Enter the total number of allowances claimed. If less than 10, precede with a 0 (zero). |
Additional Information: |
None |
Withholding Formula (Effective Pay Period 02, 2018)
- Subtract the nontaxable biweekly Thrift Savings Plan (TSP) contribution from the gross biweekly wages.
- 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.
- 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.
- Multiply the adjusted gross biweekly wages by the number of pay dates in the tax year to obtain the annual wages.
- Determine the standard deduction by applying the following guideline and subtract this amount from the annual wages:
If the Employee Is:
The Standard Deduction Is:
Single
$6,500
Married (Spouse Works)
$6,500
Married (Spouse Does Not Work)
$13,000
Head of Household
$9,550
- Determine the exemption allowance by applying the following guideline and subtract this amount from the result of step 5:
Single
Multiply the first allowance claimed by $2,100, and each additional allowance by $1,200
Married (Spouse Works)
Multiply the first allowance claimed by $2,100, and each additional allowance by $1,200
Married (Spouse Does Not Work)
Multiply the first allowance claimed by $2,100, the second allowance by $2,100, and each additional allowance by $1,200
Head of Household
Multiply the first allowance claimed by $3,500, and each additional allowance by $1,200
- Multiply the biweekly Federal income tax withholding by the number of pay dates in the tax year to compute the annual Federal income tax withholding* and subtract this amount from the result of step 6.
*Maximum of $5,000 for Single/Head of Household and Married (Spouse Works)
*Maximum of $10,000 for Married (Spouse Does Not Work) - Apply the taxable income computed in step 7 to the following table to obtain the annual Missouri tax withholding:
Tax Withholding Table
If the Amount of Taxable Income Is:
The Amount of Missouri Tax Withholding Should Be:
Over $0 but not over $1,028
1.5%
Over $1,028 but not over $2,056
$15.42 plus 2.0% of excess over $1,028
Over $2,056 but not over $3,084
$35.98 plus 2.5% of excess over $2,056
Over $3,084 but not over $4,113
$61.68 plus 3.0% of excess over $3,084
Over $4,113 but not over $5,141
$92.55 plus 3.5% of excess over $4,113
Over $5,141 but not over $6,169
$128.53 plus 4.0% of excess over $5,141
Over $6,169 but not over $7,197
$169.95 plus 4.5% of excess over $6,169
Over $7,197 but not over $8,225
$215.91 plus 5.0% of excess over $7,197
Over $8,225 but not over $9,253
$267.31 plus 5.5% of excess over $8,225
Over $9,253
$323.85 plus 5.9% of excess over $9,253
- Divide the annual Missouri tax withholding calculated in step 8 by the number of pay dates in the tax year and round to the nearest dollar to obtain the biweekly Missouri tax withholding.
- Add the additional amount or percentage elected by the employee to the pay period tax calculated in the above step and round to the nearest dollar to determine the amount of tax to be withheld for the pay period.
Resources
To view the updated tax formula, go to the
page from the drop-down menu on the National Finance Center (NFC) homepage. Select the tab and select from the menu to launch the tax map. Select the desired State from the map provided for the formula.Inquiries
For questions about NFC processing, authorized Servicing Personnel Office representatives should contact the NFC Contact Center at
or via the customer service portal.