Idaho State Income Tax Withholding
Reference Number: NFC-24-1718391875
Published: July 9, 2024
Effective: Pay Period 12, 2024
Summary
The income tax withholding formula for the State of Idaho has changed as follows:
-
The annual deduction per exemption has changed from $3,534 to $3,600.
-
The Single and Married tax tables have changed.
No action on the part of the employee or the personnel office is necessary.
Tax Formula
State Abbreviation: |
ID |
State Tax Withholding State Code: |
16 |
Acceptable Exemption Form: |
ID W-4 or W-4 (see the Additional Information section) |
Basis for Withholding: |
State or Federal Exemptions (see the Additional Information section) |
Acceptable Exemption Data: |
S/M, Number of exemptions |
TSP Deferred: |
Yes |
Special Coding: |
None |
Additional Information: |
Employees who have not previously submitted an ID W-4 and have submitted a 2020 or later Federal Form W-4 will default to Single and zero (S00). Employees who have not previously submitted an ID W-4 and have not submitted a 2020 or later Federal Form W-4 will default to the prior to 2020 Federal Form W-4 submission. |
Withholding Formula (Effective Pay Period 12, 2024)
- Subtract the nontaxable biweekly Thrift Savings Plan contribution from the gross biweekly wages.
- Subtract the nontaxable biweekly Federal Employees 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 gross annualized wages.
- Determine the exemption allowance by applying the following guideline and subtract this amount from the gross annualized wages calculated in step 4:
Exemption Allowance = $3,600 x Number of Exemptions
- Apply the taxable income computed in step 5 to the following table to determine the annual tax withholding:
Single - Tax Withholding Tables
If the Amount of Taxable Income Is:
The Amount of Tax Withholding Should Be:
Over $0 but not over $14,600
$0.00
Over $14,600
5.695% of excess over $14,600
Married - Tax Withholding Tables
If the Amount of Taxable Income Is:
The Amount of Tax Withholding Should Be:
Over $0 but not over $29,200
$0.00
Over $29,200
5.695% of excess over $29,200
- Divide the annual tax withholding calculated above by the number of pay dates in the tax year and round to the nearest dollar to obtain the biweekly 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.
Resources
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) Home page. Select the Publications tab and select Taxes from the Publications 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 1-855-NFC-4GOV (1-855-632-4468) or via the customer service portal at ServiceNow Portal for Federated Users and at ServiceNow Portal for Non-Federated Users.