New Company Registration for Idaho

All employers are required to register online with the Idaho Secretary of State through Idaho SOSbiz.

Disclaimer: This article is not intended to be tax, legal, financial, or HR advice. Rules and regulations change over time and can vary by location. Consult with a lawyer, accountant, Tax, or HR expert for specific guidance.

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Register for Taxes with Middesk

Homebase has partnered with Middesk to make tax registration easier for you.

• Middesk can register you across all 50 states for withholdings/income tax (SIT) and unemployment insurance (SUI)
• Middesk will continue to support your ongoing compliance by processing and surfacing your state mail for your review
• Middesk offers registrations for select PFMLs and local jurisdictions as well

To get started, sign up here and check out this tutorial.

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Idaho Withholding Tax

Tax Agency: Idaho State Tax Commission

The Idaho State Tax Commission administers the state’s income tax withholding. The agency’s website is: https://tax.idaho.gov/i-1026.cfm.
To obtain an Idaho state withholding account number, employers can either apply online using the Idaho Business Registration system or complete, sign and return Idaho paper *Form IBR-1, Business Registration Form.

*Idaho Form IBR-1, Business Registration Form, is a joint registration form used by the Idaho State Tax Commission to assign a withholding account number and by the Idaho Department of Labor to assign a SUI tax account number.

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State Unemployment Insurance (SUI) Tax

Tax Agency: Idaho Department of Labor

The Idaho Department of Labor administers the state’s SUI Tax. The agency’s website is: https://www.labor.idaho.gov/dnn/.
To obtain an Idaho SUI tax account number, apply online using the Idaho Business Registration system or complete, sign and return Idaho paper *Form IBR-1, Business Registration Form.

*Idaho Form IBR-1, Business Registration Form, is a joint registration form used by the Idaho State Tax Commission to assign a withholding account number and by the Idaho Department of Labor to assign a SUI tax account number.