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DBA Filing in Illinois: Cost, Steps & How to File

Every Illinois business owner eventually needs to answer the dba filing 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

$10–$150

Timeline

1–30 days

Renewal

Every 5 years in most states (California, New York, Texas)

Who needs it

sole proprietors, partnerships, and LLCs operating under a name different from the legal registered name

Steps to file a DBA (fictitious business name) in Illinois

Step 1: Search the county's DBA database to confirm the name isn't already taken
Step 2: File a DBA / fictitious business name (FBN) statement at the county clerk's office
Step 3: Pay the county filing fee
Step 4: In some states (California, Georgia, others), publish the DBA in a local newspaper for 4 consecutive weeks
Step 5: Return the newspaper's proof of publication to the county
Step 6: Use the DBA on all business marketing, receipts, and bank accounts

Required documents

Government-issued ID
Legal business name (if an entity, not sole prop)
Business address

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 dba filing 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.

Related permits in Illinois

LLC Formation in Illinois Business License in Illinois

Frequently asked questions

How much does a dba filing cost in Illinois?

Typical cost ranges from $10–$150. The exact fee depends on your specific business type, city, and any expedited processing you choose.

How long does it take to get a dba filing in Illinois?

Most Illinois applications complete in 1–30 days. Same-day or next-day processing is often available for an added fee at the state level.

Do I need a dba filing 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.