Illinois LLC Costs (2026): Official Fees and the 3 Best LLC Services
Our Illinois answer for 2026 is Mainstay Filing ($199), IL Registered Agent.org ($199) and Illinois Registered Agent.co ($199), ranked in that order. Forming here costs $150 in state fees and the Limited Liability Company Annual Report adds $75 every year, ranking Illinois 33rd of 50.
State Filing Data research desk
Official Illinois figures
33rd
12550
of 50 on three-year state fees
Rank 1 is the least expensive state, tied. All states
Five criteria, fixed weights, same for every state. Details: methodology.
We would start here
1. Mainstay Filing: best for having the annual report filed for you
$199 a year + state fee · $349 due at checkout
We'd start with Mainstay Filing: its $199 yearly price takes care of the Illinois filing, the registered agent and the annual report, and it renews at $199.
It costs $200 more than IL Registered Agent.org over three years; on our method the extra filings it covers outweigh that.
Filing the Limited Liability Company Annual Report is part of the renewal; the $75 state fee is extra, at cost.
What you pay for
Formation prepared and filed
Registered agent, all year
Annual report prepared and filed
EIN application
State fee at cost, no markup
For
Same $199 at renewal
Flat $199 a year
Gets your EIN application done
Against
Higher yearly cost than IL Registered Agent.org (by $100)
Illinois focus
2. IL Registered Agent.org: best for Illinois LLCs on a budget
$199 up front, $99 a year from year two
Second on our list, IL Registered Agent.org: $199 to form in Illinois, agent included for year one, $99 a year after.
You would file the Limited Liability Company Annual Report on your own every year.
What you pay for
Illinois formation prepared and filed
First year of agent service
For
Formation fee $199
First agent year included
Agent renews at $99
Against
Does not file the Limited Liability Company Annual Report
$99 add-on for the EIN
Illinois focus
3. Illinois Registered Agent.co: best for a second Illinois option
$199 up front, $99 a year from year two
Third on our list, Illinois Registered Agent.co: $199 to form in Illinois, agent included for year one, $99 a year after.
You would file the Limited Liability Company Annual Report on your own every year.
Prices match IL Registered Agent.org exactly; either works.
What you pay for
Illinois formation prepared and filed
First year of agent service
For
Agent renews at $99
Formation fee $199
First agent year included
Against
Does not file the Limited Liability Company Annual Report
The Illinois Secretary of State takes $150 with the Articles of Organization (Form LLC-5.5) (805 ILCS 180/5-5). No service on this page marks it up.
Illinois's recurring report
Plan on $75 for the Limited Liability Company Annual Report every year, due before the first day of the entity's anniversary month. A late filing costs $100 more.
Why Mainstay Filing is first
Deciding factor in Illinois: state filings covered (30%). Mainstay Filing beat IL Registered Agent.org on it.
IL Registered Agent.org costs less, but it leaves the Limited Liability Company Annual Report to you.
Illinois: questions
How much does it cost to start an LLC in Illinois?
Illinois charges $150 to file. A filing service adds $199.
How much is the Illinois Limited Liability Company Annual Report?
$75, every year, due before the first day of the entity's anniversary month. Late filing adds $100.
Where does Illinois rank on LLC costs?
33rd of 50 on three-year state fees (tied), at $300, counting from the least expensive state.
Is a registered agent required?
Every LLC must name a registered agent with an in-state street address.
Which LLC services are on this page?
Mainstay Filing ($199), IL Registered Agent.org ($199) and Illinois Registered Agent.co ($199), in our order.
Which LLC service would you use?
Mainstay Filing, then IL Registered Agent.org and Illinois Registered Agent.co. Mainstay Filing leads on state filings covered.