Starting an LLC in Illinois
What it costs, what you file and what you owe afterwards. Every figure below came from the state's own pages.
Forming an LLC in Illinois costs $150 to file the Articles of Organization with the Illinois Secretary of State, Department of Business Services. After that, Annual Report is due must reach the Secretary of State within the 60 days immediately before the first day of the LLC's anniversary month each year.
What it costs
| What | Amount | When |
|---|---|---|
| Articles of Organization | $150 | Once, when the LLC is formed |
| Annual Report | $75 | Must reach the Secretary of State within the 60 days immediately before the first day of the LLC's anniversary month each year. |
Registered agent
Illinois requires one. An LLC must keep both a registered agent and a registered office in Illinois at all times, and the agent must be an Illinois resident or an entity authorized to do business in the state.
What you owe after year one
Must reach the Secretary of State within the 60 days immediately before the first day of the LLC's anniversary month each year.
Missing it is the most common way a good standing lapses, and restoring one costs more than filing on time.
The official pages
- Illinois Secretary of State, Department of Business Services
- Search the register for your name
- File the Articles of Organization
- Report filing and due dates
Read from the source, 2, 3 on 2026-09-04. Fees change, so check the state page before filing. SideKix has no relationship with any state agency and takes nothing for sending you there.
Before you file
- Sole proprietor, LLC or S corp, what actually differs, with no recommendation
- What it will cost to start, because the filing fee is the small part
- Whether the name is still free, checked against the registries themselves
- What to do first if the idea is still an idea
Another state
SideKix, “How much does an LLC cost in Illinois?”, checked 2026-09-04. https://sidekixhq.com/start-an-llc-in-illinois.html
Questions people ask
How much does it cost to start an LLC in Illinois?
The state filing fee for the Articles of Organization is $150.
What form do I file to start an LLC in Illinois?
The Articles of Organization, filed with the Illinois Secretary of State, Department of Business Services.
Does Illinois require an annual report for an LLC?
Must reach the Secretary of State within the 60 days immediately before the first day of the LLC's anniversary month each year.
Do I need a registered agent in Illinois?
Yes. An LLC must keep both a registered agent and a registered office in Illinois at all times, and the agent must be an Illinois resident or an entity authorized to do business in the state.