Illinois Payroll Tax Registration

Powered by US TAX BAY – Your Nationwide Payroll Compliance Partner

Hiring employees in Illinois? Before you can run payroll, your business must register for Illinois state payroll tax accounts, including withholding tax and unemployment insurance (UI) tax. These accounts are essential to legally pay employees and file taxes in the state.

With multistate hiring and remote work becoming common, many businesses trust US TAX BAY to manage payroll tax registrations with speed and precision—so you stay focused on growth.

🏛️ Overview: Payroll Taxes in Illinois

Employers in Illinois must register for the following:

• Withholding Tax – to withhold state income tax from employee paychecks

• Unemployment Insurance (UI) Tax – paid by the employer to support unemployment benefits

Illinois simplifies this process by allowing registration for both through a single online portal.

1. Employer Withholding Tax Registration – Illinois

Agency: Illinois Department of Revenue (IDOR)

Who Must Register: Any employer who pays wages to employees who live or work in Illinois must withhold state income tax and register with the IDOR.

How to Register:

✅ Complete Form REG-1: Illinois Business Registration Application

✅ Register online at MyTax Illinois or by mail

✅ A valid Federal EIN is required

Once registered, you will receive your Illinois withholding tax account number for payroll processing and tax filings.

2. Unemployment Insurance (UI) Tax Registration – Illinois

Agency: Illinois Department of Employment Security (IDES)

Who Must Register:

Employers that:

• Pay $1,500 or more in wages in any calendar quarter, OR

• Employ at least one worker for 20 weeks or more in a year

How to Register:

✅ File Form UI-1: Report to Determine Liability under the Unemployment Insurance Act

✅ Register online via MyTax Illinois or by mail

✅ UI tax registration is processed by IDES after completing REG-1

✅ Why Choose US TAX BAY?

We handle everything from start to finish, including:

✔️ Illinois withholding & UI tax account setup

✔️ Registration through MyTax Illinois

✔️ Compliance checks to avoid delays

✔️ Personalized support and guidance

🚀 Let’s Get You Registered in Illinois

US TAX BAY makes payroll compliance fast, simple, and reliable—no paperwork headaches. Whether you’re hiring remote staff or expanding your footprint, we’ll ensure your Illinois accounts are set up accurately and on time.

👉 Book a Free Consultation Now

📧 info@ustaxbay.com | 🌐 www.ustaxbay.com

US TAX BAY – Fast. Affordable. Done Right.

Your Trusted Partner for Payroll Compliance in All 50 States

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