Illinois · Secretary of State
Illinois wants a street-address agent year-round — and a separate $25 change filing.
Formation funnels sell an Illinois “business address” as if any mailbox will do and treat agent switches as free paperwork. The Limited Liability Company Act is clearer: continuously maintain a registered agent and registered office in this State, put a street (or rural-route) address on file, pay $25 to change the agent or office, and still file the $75 annual report in the anniversary-month window.
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What §§1-5 and 1-35 say
| Item | Published rule |
|---|---|
| Continuous maintenance | §1-35(a): every domestic and foreign LLC shall continuously maintain in this State a registered agent and registered office. |
| Who may serve | §1-35(a): an individual resident of this State, or another person authorized to transact business in this State. |
| Registered office (definition) | §1-5: an office maintained by the LLC in this State, the address — including street, number, city, and county — of which is on file with the Secretary of State, where process may be served on the registered agent. |
| Address on a change statement | §1-36(b): the statement lists the address including street and number, or rural route number, of the then registered office and of any new office. The registered-office address and the registered agent’s business-office address must be identical after the change. |
| Resignation clock | §1-35(c)–(d): the agent may resign by filing written notice and mailing a copy to the LLC at least 10 days before filing. A new registered agent must be placed on record within 60 days after that notice of resignation. |
Fees we can put in a table
| Instrument | Fee | Note |
|---|---|---|
| Change of RA / registered office | $25 | §50-10(b)(15): statement of change of address of registered office or change of registered agent, or both. Separate from the annual report. |
| Annual report (standard LLC) | $75 | §50-10(b)(11): $75, plus a penalty if delinquent. Series LLCs add $50 per certificate of designation in effect on the statutory snapshot date. |
| Annual-report window | — | §50-1(b): deliver the report and fees within the 60 days immediately preceding the first day of the anniversary month. |
| Articles amendment (general) | $50 | §50-10(b)(2): filing amendments (domestic or foreign) is $50 — not the dedicated RA/office change instrument. |
What this page does not do
It does not quote the entire Limited Liability Company Act, does not price every expedite SKU on the SOS portal, and does not pick a commercial agent for you. Change filing compared with TX/FL/CA/WY/NY/DE: change of agent.
Questions
Does an Illinois LLC need a registered agent in Illinois?
Yes. 805 ILCS 180/1-35(a) says each limited liability company and foreign limited liability company shall continuously maintain in this State a registered agent and registered office. The agent must be an individual resident of this State or another person authorized to transact business in this State.
Can the Illinois registered office be a P.O. Box alone?
The Act’s definition of registered office (§1-5) requires an address including street, number, city, and county on file with the Secretary of State. Section 1-36 change statements likewise call for street and number, or rural route number. A P.O. Box alone does not supply that street/number (or rural-route) field.
How much is an Illinois change of registered agent?
805 ILCS 180/50-10(b)(15) charges $25 for filing a statement of change of address of registered office or change of registered agent, or both. That is a separate filing from the annual report under §50-1.
What is the Illinois LLC annual report fee and due window?
§50-10(b)(11) sets the annual-report fee at $75 for a standard LLC (plus $50 per series certificate of designation when a series LLC applies). §50-1(b) says the report and fees must be delivered within the 60 days immediately preceding the first day of the anniversary month.
Sources
Official vendor, secretary of state, or statute pages. Third-party “best of” lists were not used. Retrieval dates are on each row.
- 805 ILCS 180/1-5 (registered office defined: street, number, city, county) Retrieved 2026-09-03.
- 805 ILCS 180/1-35 (continuous registered agent and office; resignation; 60-day replacement) Retrieved 2026-09-03.
- 805 ILCS 180/1-36 (statement of change; street/number or rural route; identical agent office) Retrieved 2026-09-03.
- 805 ILCS 180/50-1 (annual report; 60 days preceding anniversary month) Retrieved 2026-09-03.
- 805 ILCS 180/50-10 (fees: change RA/office $25; annual report $75; amendments $50) Retrieved 2026-09-03.