3 Best LLC Services in Illinois (2026): Fee Schedule
Illinois Registered Agent.co ($199), IL Registered Agent.org ($199) and Mainstay Filing ($199) come out first, second and third among Illinois LLC formation services for 2026. Charges for three years run $397 to $597, and Illinois bills $150 to file no matter which company you hire.
Prepared by the Agent Fee Tables editorial team ·
Schedules ordered by: Score = 39% charges + 31% duties + three small measures (method)
Summary of fees
State charge to form the LLC$150ilsos.gov {fee list dated October 2026}
What the first year bills$199State fee billed separately
Years 1 to 3 added$397 to $597Both renewals counted
Government charges, 3 years$300Filing, reports, any minimum tax
Cost lines cross inCharges stay apartStable for a decade
Illinois fee schedules
Service fees only. Every schedule is subject to the same $150 state fee.
#Opening chargeRenewal chargeCharges, three years
1
1. Illinois Registered Agent.co: best for plain formation
Ranked first
Opens at $199; later years $99
Opening charge
$199
Charge from year two
$99/yr
Charges, three years
$397
Schedule one belongs to Illinois Registered Agent.co. $199 in year one, then $99 a year.
Charges under Mainstay Filing's over three years earn it the top place.
The Limited Liability Company Annual Report falls outside its duties.
Duties the charge covers
Formation delivered to the state office
Agent service in the first year
Charges in its favor
$99 a year after that
$199 plus the state fee
Agent included to start
Charges against it
You prepare the Limited Liability Company Annual Report at your own desk
To get the state figure, add the filing fee, two later reports and any minimum tax. Open-ended costs get a mention but no number.
Why schedule one is first
Illinois Registered Agent.co did better than IL Registered Agent.org on charges over three years, a 39% measure.
Illinois Registered Agent.co totals $397 at year three, $200 under Mainstay Filing.
With the EIN application in the sum, the charges meet in year 2, when Mainstay Filing passes Illinois Registered Agent.co.
The Illinois LLC filing fee and what the state requires, in its own words
Requirements: the Articles of Organization (Form LLC-5.5); fee $150; office the Illinois Secretary of State. Every LLC must name a registered agent with an in-state street address.
Source wording: ilsos.gov {fee list dated October 2026}
Filing it yourself
Do it alone and Illinois still collects $300 over three years, plus you complete every form. A service charges $397 to $597 to take that off you.
Quick answers
What do LLC formation services charge in Illinois?
$199 in year one across these schedules, plus the state's $150 filing fee.
What do these schedules add up to over three years?
Anywhere from $397 to $597 for three years of service.
How much does Illinois bill to file an LLC?
$150 to the state; the form is the Articles of Organization (Form LLC-5.5).
What does Illinois bill each year after formation?
After formation, expect Illinois to bill for the Limited Liability Company Annual Report each year at $75, before the first day of the entity's anniversary month.
Does the charge include the EIN application?
Service by service: Illinois Registered Agent.co ($99), IL Registered Agent.org ($99) and Mainstay Filing (included).
When does one schedule pass another in total charges?
No crossing within ten years; no schedule passes another.
Which LLC formation service is the best value in Illinois?
Illinois Registered Agent.co, which wins on charges over three years. IL Registered Agent.org and Mainstay Filing follow.