# 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:

1. **Withholding Tax**  
2. **State Unemployment Insurance (SUI) Tax**

#### ➤ Required State Agencies

- **Idaho State Tax Commission** — [https://tax.idaho.gov/index.cfm](https://tax.idaho.gov/index.cfm)
- **Idaho Department of Labor** — [https://www.labor.idaho.gov/dnn/](https://www.labor.idaho.gov/dnn/)
- **Idaho Secretary of State** (business entity registration) — [https://sosbiz.idaho.gov/auth?page=login](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](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](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)](https://tax.idaho.gov/forms/EFO00147_05-09-2019.pdf)
- 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.