Idaho State Tax Guide

State tax registration guide for Idaho.

Need to register taxes in another state? Review the State section in our Tax Services Toolkit.

 

REQUIRED REGISTRATIONS

  • Unemployment Insurance: Idaho Sales Tax Commission

  • Income Tax Withholding: Idaho Department of Labor

 

REQUIRED INFORMATION

  • SIT ID # (format: XXXXXXXXX)

  • SIT payment frequency

  • SUI ID # (format: XXXXXXXXXX)

  • Current year SUI/AR/WFD rates

  • SUI PIN (format: XXXXXX)

Note: Based on your company's details, your Namely Payroll setup may include several Idaho Tax Codes. Idaho Workforce Development and Idaho Admin Reserve both use the same ID as Idaho Unemployment tax.

 

REGISTERING FOR UNEMPLOYMENT INSURANCE

If you have not run payroll in Idaho in the past, you will need to register with the Idaho Department of Labor which you can do by completing the online registration 

Note: Each employer only needs to register once to complete the withholding and unemployment insurance tax registration.

Once registered, you will receive an Unemployment Account Number (UI) and Unemployment Rate (%) which you will need to enter into Namely Payroll under Company > Tax (UI tax).

Businesses that have run payroll in Idaho in the past can find their UI Account Number on the Notice of Tax Rate or other notices received from the Idaho Department Labor.


Contact:

For additional information on registering for taxes, read Employment Tax Registration Overview.

 

REGISTERING FOR INCOME TAX WITHHOLDING  

If you've never run payroll in Idaho before, you'll need to register with the Idaho State Tax Commission by completing the online registration 

Note: Each employer only needs to register once to complete the withholding and unemployment insurance tax registration.

Once registered, you will receive a Withholding Tax Account Number (WH) which you will need to enter into Namely Payroll under Company > Tax (WH tax).

Businesses that have run payroll in Idaho previously can find their Withholding Account Number on the Withholding Payment Voucher (Form 910) or on notices received from the Idaho State Tax Commission. 

 

Contact:

For additional information on registering for taxes, read Employment Tax Registration Overview.

 

OTHER STATE TAXES TO CONSIDER

Administrative Rate

The Idaho Administrative Reserve Rate is a part of the overall UI Tax rate and appears on the Notice of Tax Rate form that employers receive from the Idaho Department of Labor. 

New employers in Idaho will receive their Administrative Reserve Rate once they have registered with the Idaho Department of Labor.

Contact:

Refer to the Idaho Dept. of Labor site for the new employer rate.  

 

Workforce Rate

The Idaho Workforce Development Rate is a part of the overall UI Tax Rate and appears on the Notice of Tax Rate form that you receive from the Idaho Department of Labor. 

New employers in Idaho will receive their Workforce rate once they have registered with the Idaho Department of Labor. 

Contact:

Refer to the Idaho Dept. of Labor site for the new employer rate.

 

POWER OF ATTORNEY FORMS

Please note, Namely does not require a Power of Attorney for this state at this time. It is not required to file or remit payments on your behalf. If one is needed to resolve a tax matter, the tax notice team will request one from you at that time.

If a Power of Attorney is requested from you, you should email completed copies of the forms namelyPOA@Namely.com with the CID in the subject line for processing. We will update our system and maintain a copy of each form for record-keeping purposes

For additional information on Power of Attorney, read Completing the Power of Attorney Package.

 

STATE INCOME WITHHOLDING FORMS

Namely uploads Federal and State W-4 documents to your HRIS site for use during Onboarding, or if you need to send W-4s to employees who need to make withholding adjustments. 

Tip:

The most up to date W-4 documents can be found in the Namely section of the Document dropdown menu in Onboarding and Manage eSignature. 

Form Name: ID W-4

Accepts Federal W-4: Yes

Comments: Every new employee must provide to the employer a withholding certificate showing the number of allowances claimed. A state withholding certificate, Form ID W-4, Employee's Withholding Allowance Certificate, was released Jan. 7, 2019.

If employees do not provide Form ID W-4 or a federal W-4 modified to report state allowances, employers may use the federal W-4 to calculate state withholding.


PAYROLL + TAX FACTS

Refer to this document for more information: 2022-2023 Federal and State: Payroll and Tax Fact Sheet.