3 Best Foreign Registration Services in Illinois (2026), Answered
Who should you hire in Illinois for foreign registration services in 2026: we say IL Registered Agent.org ($199), Mainstay Filing ($199) and Illinois Registered Agent.co ($199), ranked best first. Illinois charges $150 to register, and service fees add $397 to $497 over three years.
By the LLC Answered editorial team
Answer in four lines
Short reply
Charged by the state
$150
Proof from home?
Yes, attach it (60 days or newer)
Ongoing filing
$75, annual report
Hire in this order
IL Registered Agent.org, Mainstay Filing then Illinois Registered Agent.co
Our Illinois picks, best first
Order set by our five tests: three-year cost first, then what the price covers.
#1Hire first
1. IL Registered Agent.org: best for a low yearly agent fee
$199 to register, $99 for the agent after
Hire IL Registered Agent.org in Illinois: registering costs $199 over the state fee, agent covered in year one, then $99 a year.
Cost decides it: three years here total less than at Mainstay Filing.
What is bundled
Application sent for you
First-year agent
Pluses
Then $99 yearly
First-year agent comes with it
$199 plus the state fee
Downsides
No coverage outside the state
#2Coverage everywhere
2. Mainstay Filing: best for LLCs adding more states
$199 to register, $149 for the agent after
In second spot, Mainstay Filing, as you pay $199 plus Illinois's fee, skip the registered agent charge in year one and then pay $149 a year.
IL Registered Agent.org is $100 less across three years, enough to rank higher.
The registered agent renews at $149 a year in every state.
What is bundled
State registration handled
Registered agent, covered the first year
A nationwide flat fee
Pluses
One price anywhere
The first agent year is covered
$199 to register
Downsides
$50 a year more for the agent
#3Illinois only
3. Illinois Registered Agent.co: best for a second in-state filer
$199 to register, $99 for the agent after
In third spot, Illinois Registered Agent.co, as registering costs $199 over the state fee, agent covered in year one, then $99 a year.
IL Registered Agent.org charges the same, which makes this a near tie.
Over three years the state's total is $300. source ilsos.gov (October 2026) on file
Where does the registration go?
Submit one document, the Application for Admission to Transact Business (Form LLC-45.5), to the Illinois Secretary of State, Department of Business Services, Limited Liability Division.
The filing needs certificate of Good Standing or Existence dated at most 60 days.
What do I owe once registered?
Expect a annual report at $75.
Filings come due Within the 60 days before your anniversary month.
Why this order?
IL Registered Agent.org leads on three-year price, a 36% test.
65% of the score comes from three-year price and paperwork covered.
$397 for three years at IL Registered Agent.org is $100 below Mainstay Filing.