Reference · Illinois
Illinois LLC requirements
Every requirement we've verified for a domestic LLC in Illinois, with the source for each. For the plain-English cost answer, use the cost calculator.
| Filing agency | Illinois Secretary of State, Department of Business Services |
|---|---|
| Formation filing fee | $150 |
| Filing fee notes | Articles of Organization (Form LLC-5.5): $150 standard. One secondary source quoted $153, likely a small online card-processing surcharge. |
| Standard processing | Not confirmed. |
| Expedited options | Not confirmed. |
| Periodic report | Annual Report |
| Report frequency | annual |
| Report fee | $75 |
| Report deadline | Due before the first day of the LLC's anniversary month each year; may be filed up to 45 days early; no extensions. |
| Late penalty | $100 penalty if more than 60 days late (reduced from $300 under House Bill 4578, Illinois LLC Act Sec. 50-15). |
| Administrative dissolution | SOS may administratively dissolve if the annual report remains unfiled (~180 days late per secondary sources). |
| State tax | No franchise tax for LLCs (Illinois franchise tax applied only to corporations and has been phased out). |
| Minimum state tax | None |
| Newspaper publication | Not required |
| Registered agent required | Yes |
| First-year minimum | $225 |
Confidence
What we're less sure about
Verified against the official state page
- STATUTE-CONFIRMED (10 Sep 2026). 805 ILCS 180/50-10(b)(1) sets the domestic articles-of-organization fee at $150; 50-10(b)(11) sets the LLC annual report fee at $75.
- Formation fee $150 vs $153 unresolved.
- $150 + $75 = $225, assuming the anniversary month falls within 12 months.
Provenance
Sources
Every figure above traces to one of these. If a state changes a fee and we haven't caught it, tell us — we log corrections publicly.
- law.justia.com — https://law.justia.com/codes/illinois/chapter-805/act-805-ilcs-180/article-50/
- ilsos.gov — https://www.ilsos.gov/departments/business_services/home.html