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New company registration in Idaho

Income tax withholding

Register online with the Idaho State Tax Commission (STC). You should receive your Withholding Account Number and deposit schedule in about 10 days. Please keep this time frame in mind when planning your first Idaho payroll.

Withholding Account Number

The Withholding Account Number is usually labeled as a "Permit Number" by Idaho State Tax Commission (STC) and is nine digits long. 

  • If you have documentation from STC that shows a 10 or 11 digit number (999999999-09 or 999999999-W), please only enter the first nine numbers. 
  • Do not include in Gusto any of the numbers or letters to the right of the hyphen/dash (either a -09 or -W). 
    • Example: If your notice says to enter 000123456-09, enter 000123456, and do not include the '09.' 
  • Do include any leading zeros at the start of the number.
    • Example: If your notice says to enter 000123456-09, enter 000123456. Do not include the '09.'
  • If you have documentation with nine digits with leading zeros, make sure to include the leading zeros.
    • Example: If the notice says to enter 000123456, enter 000123456 in Gusto.
  • If you have a number with less than nine digits, you should confirm that the agency provided you with the correct withholding account number for STC.
    • To do so, call: (800) 972-7660.
    • Once confirmed, you should add leading zeros when updating your account number in Gusto in order to create a nine-digit number.
      • Example: If the state documentation says to enter 123456, please enter 000123456 (add leading zeros to create a nine-digit number).

If you have any questions about the application call the agency at (800) 972-7660.

Unemployment tax

Most companies are liable for state unemployment if they pay at least $1500 in wages in a calendar quarter or have one employee for some part of a week in 20 different weeks during a calendar year. You can check your liability and register online with the Idaho Department of Labor. You should receive your account number and UI contribution rate in about 10 days.

Click here to view state-by-state new employer rates and wage bases

Workforce development 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. The rate for new employers can be found hereIf you have any questions about your account number or rates call the agency at (208) 332-3576.

Administrative reserve 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. 

Idaho State Tax Commission TAP Account Authorization

In order for Gusto to resolve tax matters on your behalf, please create an online account with the state TAP website:

  1. Navigate to the Idaho State Tax Commission TAP website here.
  2. Under "Sign Up for Online Access", click Sign Up.
  3. Enter your registration information and click Submit.
  4. Once you've registered with TAP, log into your Gusto account and select Yes, I have a TAP account in the Idaho Tax Setup. We will then configure your account so that we can start filing to Idaho on your behalf.
  5. You will receive an access code from Idaho which you need to give to Gusto in order for us to have access to your account. Email the access code to [email protected].

Troubleshoot State Tax Commission TAP authorization issues

To ensure successful authorization of Gusto, please verify that the following information you have entered into Gusto matches what is on file with the Idaho State Tax Commission:

  • Official company name/address
  • FEIN - Federal Employment Identification Number
  • Withholding Tax Account ID
  • Idaho TAP Access Code (once received)

If Gusto is having trouble gaining access to your account, please verify that the above information in Gusto matches exactly what the agency has on file by giving them a call at (208) 334-7660.

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