Illinois Secretary of State, Department of Business Services

Illinois business entity search

Office facts, status meanings and filing rules for Illinois. The steps below show how to search Illinois's official registry.

Federal filings only here. Illinois registry records are on the official site.

Illinois registry at a glance

Registry agency: Illinois Secretary of State, Department of Business Services; Source: ilsos.gov · checked 2026-10-06
Phone: 800-252-8980; Source: ilsos.gov · checked 2026-10-06
Address: Springfield Office: 501 S. Second Street, Room 350, Springfield, IL 62726. Chicago Office: 160 N. LaSalle Street, Chicago, IL 60601.; Source: ilsos.gov · checked 2026-10-06
Hours: Monday to Friday, 8 a.m. to 4:30 p.m.; Source: ilsos.gov · checked 2026-10-06
Official search: Business Entity Search →; Source: apps.ilsos.gov · checked 2026-10-06
Registry number: File number

How to search the Illinois registry

The Business Entity Search searches by business name, registered agent, president, secretary, manager, file number, keyword and partial word.

Open Business Entity Search on the Illinois Secretary of State site.Source: apps.ilsos.gov · checked 2026-10-06
Choose a search method: business name, registered agent, president, secretary, manager, file number, keyword, or partial word.Source: apps.ilsos.gov · checked 2026-10-06
Enter the search term and submit the search.Source: apps.ilsos.gov · checked 2026-10-06
Select the entity from the results list.Source: apps.ilsos.gov · checked 2026-10-06
Check its status, file number, registered agent, and annual report date on the detail page.Source: apps.ilsos.gov · checked 2026-10-06

Source: apps.ilsos.gov · checked 2026-10-06

Open the official Illinois search →

Three numbers, three agencies

Asking for the wrong number is a common reason a search comes back empty.

Federal EIN: Internal Revenue Service; Identifies the business for federal tax. It is the same number in every state.; Source: irs.gov
File number: Illinois Secretary of State, Department of Business Services; Identifies the entity's record in the Illinois registry.
Illinois Business Tax (IBT) number: Illinois Department of Revenue; The Secretary of State links separately to guidance on the federal tax ID (FEIN) and the state tax ID (EIN/IBT). The IBT number comes from the Department of Revenue through MyTax Illinois, and the file number belongs to the Secretary of State.; Source: ilsos.gov · checked 2026-10-06

Fees and annual filings

LLC formation: $150 (Articles of Organization, form LLC 5.5); $400 for a series LLC; Source: ilsos.gov · checked 2026-10-06
Corporation formation: $150 (Articles of Incorporation), plus initial franchise tax; Source: ilsos.gov · checked 2026-10-06
Annual filing: Annual Report; Source: ilsos.gov · checked 2026-10-06
Annual fee, LLC: $75; Source: ilsos.gov · checked 2026-10-06
Annual fee, corporation: $75, plus franchise tax; Source: ilsos.gov · checked 2026-10-06
When it is due: Due before the first day of the entity's anniversary month each year.; Source: ilsos.gov · checked 2026-10-06
Late filing: An LLC that misses the due date goes into delinquent status. If it has not filed within 60 days it is placed in penalty status with a $100 late-filing penalty, and after 120 days of delinquency it is administratively dissolved.; Source: ilsos.gov · checked 2026-10-06
Filed with: Illinois Secretary of State, Department of Business Services, online or on paper; Source: ilsos.gov · checked 2026-10-06
Corporate franchise tax: Illinois Secretary of State. Paid with the corporation's annual report; an initial franchise tax is paid at incorporation. Applies to corporations, not LLCs. The amount depends on paid-in capital; the rate and exemption were not read on an official page for this file.
Note: Expedited service is extra and must be requested in person in Springfield or Chicago. Expedited fees are in addition to filing fees, franchise taxes, penalties, and interest.; Source: ilsos.gov · checked 2026-10-06

As published by the Illinois Secretary of State, Department of Business Services, checked 2026-10-06. Fees change, and the official schedule decides.

Forming or running a business in Illinois

Registered agent: Illinois entities keep a registered agent and registered office on file, and changes are made by filing form LLC 1.36/1.37 ($25) or the corporate equivalent.; Source: ilsos.gov · checked 2026-10-06
Name availability: Check whether a name is available in Illinois →
Business forms and fees: Official Illinois business forms and fees →

Illinois businesses on file

AAR CORP.EIN 36-2334820
OIL-DRI CORPORATION OF AMERICAEIN 36-2048898
GEO SPECIALTY CHEMICALS, INC.EIN 34-1708689
UNITED AIRLINES, INC.EIN 74-2099724
AMERICAN LUNG ASSOCIATIONEIN 13-1632524
ABBOTT LABORATORIESEIN 36-0698440
MCDONALDS CORPORATION AND SUBSIDIARIESEIN 36-2361282
DEERE & COMPANYEIN 36-2382580
ABBVIE INC.EIN 32-0375147
PACTIV LLCEIN 36-2552989
US FOODS, INC.EIN 36-3642294
KRAFT HEINZ FOODS COMPANYEIN 25-0542520
W. W. GRAINGER, INC.EIN 36-1150280
CONAGRA BRANDS, INC.EIN 47-0248710
ILLINOIS TOOL WORKS INC.EIN 36-1258310
DISCOVER FINANCIAL SERVICESEIN 36-2517428
MOTOROLA SOLUTIONS, INC.EIN 36-1115800
BRUNSWICK CORPORATIONEIN 36-0848180
R. R. DONNELLEY & SONS COMPANYEIN 36-1004130
TRIBUNE MEDIA COMPANYEIN 36-1880355
PACKAGING CORPORATION OF AMERICAEIN 36-4277050
SP PLUS CORPORATIONEIN 16-1171179
R1 RCM HOLDCO, INC.EIN 02-0698101
ARCHER DANIELS MIDLAND COMPANYEIN 41-0129150

All 561 Illinois businesses on file →

Sources

A fact that could not be confirmed on an official page is left out.

https://www.ilsos.gov/departments/business-services.htmlchecked 2026-10-06
https://apps.ilsos.gov/businessentitysearch/checked 2026-10-06
https://www.ilsos.gov/publications/business-services/llc.htmlchecked 2026-10-06
https://www.ilsos.gov/publications/business-services/dfc.htmlchecked 2026-10-06
https://www.ilsos.gov/content/dam/publications/pdf_publications/c334.pdfchecked 2026-10-06
https://www.ilsos.gov/departments/business-services/annual-reports/llc-instructions.htmlchecked 2026-10-06