SOS Business Search

Illinois Secretary of State office — contact, fees, and licensing

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Illinois Official SOS Website

The Illinois Secretary of State's Business Services Division handles entity formation, annual reports, and related filings from two offices — Springfield (the primary office) and Chicago. Both offices offer in-person service and accept the same documents by mail; expedited processing requires an in-person visit to the Springfield or Chicago Business Services office (a small set of additional filing services, but not full expedited processing, is also available at select DMV+/Flagship locations — see below).

Updated August 2026

Office contact

Springfield address
501 S. Second Street, Room 350, Springfield, IL 62726
Chicago address
160 N. LaSalle Street, Chicago, IL 60601
Toll-free phone
(800) 252-8980
Corporations Division (direct)
(217) 782-6961
LLC Division (direct)
(217) 524-8008 ext. 7736
Office hours
Monday – Friday, 8:00 a.m. to 4:30 p.m.
Online entity search
apps.ilsos.gov/businessentitysearch
Business Services homepage
ilsos.gov — Business Services

DMV+/Flagship business services expansion

Beyond the Springfield and Chicago Business Services offices, the Secretary of State now offers select business services — certificates of good standing, certified copies, corporation and LLC filings, and trademarks — at the Aurora, Champaign, Lake Zurich, and Melrose Park DMV+ facilities and the Chicago and Springfield Flagship Centers. Full expedited processing, however, is still limited to the Springfield or Chicago Business Services office and must be requested in person.

Entity formation and filing fees

Fees below are from the Illinois Secretary of State's live publication pages, confirmed August 2026. Expedited service is available in person at Springfield or Chicago only — not by mail. Verify current amounts at ilsos.gov — Publications before filing.

Filing Standard fee
LLC — Articles of Organization $150 (+$100 expedited, in-person only)
LLC — Annual Report $75 (+$50 expedited, in-person only)
LLC — Name Reservation $25 (+$50 expedited, in-person only)
LLC — Certificate of Good Standing $25 (+$20 expedited, in-person only)
For-Profit Corporation — Articles of Incorporation $150 (+$100 expedited, in-person only)
For-Profit Corporation — Annual Report $75 (+$50 expedited, in-person only)
Not-for-Profit Corporation — Articles of Incorporation $50 (+$25 expedited, in-person only)
Not-for-Profit Corporation — Annual Report $10 (+$25 expedited, in-person only)
Not-for-Profit Certificate of Good Standing $5 (+$10 expedited, in-person only)

Illinois applies franchise taxes to some corporations in addition to annual report fees — the fee pages note that listed fees may not include applicable franchise taxes, penalties, or interest. Confirm with the Division whether franchise tax obligations apply to your entity type.

Key Illinois state licensing agencies

Illinois Department of Financial and Professional Regulation (IDFPR)

What it covers
200+ professional and occupational licenses — doctors, nurses, real estate, cosmetology, contractors, accountancy, and others

Illinois Department of Revenue (IDOR)

What it covers
State tax ID (Illinois Business Tax number), sales tax, withholding tax

Illinois Department of Commerce and Economic Opportunity (DCEO)

What it covers
Business Information Center — permits and regulatory guidance for new businesses; grants and incentives

Illinois Department of Employment Security (IDES)

What it covers
Unemployment insurance employer account registration — new employing units must register within 30 days of start-up, via MyTax Illinois or the paper REG-UI-1 form

This guide is informational only and is not affiliated with the Illinois Secretary of State's office or any state agency listed above. Contact information and fees verified against official Illinois Secretary of State sources, August 2026. Verify current fees at the official state website. Last verified: August 2026.

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