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Employer Registration in Illinois: Cost, Steps & How to File

Every Illinois business owner eventually needs to answer the employer registration question: what does it cost, how long does it take, and where do I actually file? This page answers all three with the current Illinois numbers, plus the government link to start the application.

Typical cost

Free

Timeline

1–14 days

Renewal

No renewal — ongoing quarterly filings

Who needs it

any business with W-2 employees

Steps to register as an employer in Illinois

Step 1: Get an EIN from the IRS if you don't already have one (free, online, immediate)
Step 2: Register with the state's employment/labor department for unemployment insurance (SUTA) tax
Step 3: Register with the state's department of revenue for state income tax withholding
Step 4: Register for workers' compensation insurance — required in almost every state, even for 1 employee
Step 5: Report new hires within 20 days to the state's new hire directory (federal requirement enforced by the state)
Step 6: Set up payroll processing (Gusto, ADP RUN, or manual quarterly 941 filings)

Required documents

EIN
First hire date
Estimated quarterly payroll
Workers' comp policy

Where to file in Illinois

Business filings: https://www.ilsos.gov/departments/business_services/home.html
Secretary of State: https://www.ilsos.gov
Tax authority: https://tax.illinois.gov
Labor/workforce: https://ides.illinois.gov

Heads up: A common Illinois mistake: assuming this employer registration covers your city and county requirements too. It usually doesn't. Check your city's business division separately — most cities in Illinois require their own general business license on top of state filings.

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LLC Formation in Illinois Sales Tax Registration in Illinois

Frequently asked questions

How much does a employer registration cost in Illinois?

Typical cost ranges from Free. The exact fee depends on your specific business type, city, and any expedited processing you choose.

How long does it take to get a employer registration in Illinois?

Most Illinois applications complete in 1–14 days. Same-day or next-day processing is often available for an added fee at the state level.

Do I need a employer registration if I'm just starting a home business in Illinois?

In most cases, yes — even home-based businesses in Illinois are subject to the same state filing rules. Local rules (city and county) may add a home occupation permit on top.

This page reflects general Illinois filing rules as of 2026. Fees and processing times change; verify the current amounts with the linked state agency before filing.