Short answer: The business name must include LLC designators.
We've pulled these figures from the Illinois Secretary of State, Department of Business Services's own pages. If something's changed since our last check, the state's portal wins, so it's worth a quick look before you pay.
Illinois naming rules
The business name must include LLC designators.
Open the official Illinois name search
Reserving a name
Illinois lets you reserve a name for $25, which holds it for 90 days.
Doing business under another name
Illinois DBAs are filed with: state. Fee: $30 to $150.
How Illinois compares
Illinois's name reservation fee is $25. That's the 18th highest of 50 jurisdictions we track. The national median is $25, right where Illinois sits.
| State | Fee | National rank (1 = highest) |
|---|---|---|
| Illinois | $25 | 18 of 50 |
| Indiana | $10 | 41 of 50 |
| Minnesota | $55 | 6 of 50 |
| Wisconsin | $15 | 38 of 50 |
| Iowa | $10 | 41 of 50 |
| Ohio | $39 | 11 of 50 |
Illinois fees that apply here
| Filing | State fee | Notes |
|---|---|---|
| Articles of Organization (Form LLC-5.5) | $150 | A Series LLC requires a $400 fee. |
| Name reservation (optional) | $25 | 90 days |
| Amendment | $50 | |
| DBA / assumed name | $30 to $150 | state |
Name search and rules: Illinois questions
How do I check if an LLC name is available in Illinois?
Use the official Illinois Secretary of State, Department of Business Services business search. A name that's distinguishable from existing records can usually be registered.
What words must an Illinois LLC name include?
The business name must include LLC designators.
Can I reserve an LLC name in Illinois?
Yes. Reservation costs $25 and holds the name for 90 days.
Do I need a DBA in Illinois?
Only if you'll do business under a name other than your exact LLC name. DBAs are filed with: state. Fee: $30 to $150.
Sources and verification
Last checked against official state sources on . States change fees with little notice, so confirm on the filing portal before you pay. How we verify.
Still being confirmed with the state: processing.mail.