Idaho
Register your business in Idaho by following essential steps for tax compliance and agency connections.
Idaho New Business Registration Guide
Taxes You Must Register For
If you’re starting a business with employees in Idaho, you must register for:
- Withholding Tax
- State Unemployment Insurance (SUI) Tax
➤ Required State Agencies
- Idaho State Tax Commission — https://tax.idaho.gov/index.cfm
- Idaho Department of Labor — https://www.labor.idaho.gov/dnn/
- Idaho Secretary of State (business entity registration) — https://sosbiz.idaho.gov/auth?page=login
➤ Step-by-Step Registration Process
✅ Step 1: Register Your Business with the Secretary of State
Before registering for taxes, you must register your legal business entity:
- Go to the Idaho SOSBiz portal: https://sosbiz.idaho.gov/auth?page=login
- Create an account or log in
- Register your business entity online
✅ Step 2: Register for Withholding Tax and SUI Tax
Both the Idaho State Tax Commission and the Idaho Department of Labor use a joint registration system.
You can register in one of two ways:
Option 1: Online Registration
- Use the Idaho Business Registration System: https://www2.labor.idaho.gov/ibrs/ibr.aspx?sAction=1
- Complete the multi-agency form for both withholding and SUI
- Submit online
Option 2: Paper Registration
- Download and complete Form IBR-1 (Business Registration Form)
- Sign and submit by mail as instructed on the form
➡️ This form will register your business for:
- An Idaho Withholding Account Number (via the Tax Commission)
- An Idaho SUI Account Number (via the Department of Labor)
➤ Final Step
Once registration is approved, you’ll receive your:
- Withholding Tax Account Number
- SUI Tax Account Number
➡️ Update your Check account with both numbers for compliance and payroll processing
Need help?
- Idaho State Tax Commission
Website: https://tax.idaho.gov/i-1026.cfm
Phone: (208) 334-7660
- Idaho Department of Labor
Website: https://www.labor.idaho.gov/dnn/
Phone: (208) 332-8942
⚠️ Disclaimer: This guide does not constitute legal or tax advice. Please consult a CPA or legal professional for official guidance.