Foreign LLC Services › Illinois
Foreign LLC services in Illinois, compared
In Illinois a filing service costs $199 on top of the $150 state fee. Mainstay Filing is our first pick.
Best 3 Foreign Registration Services in Illinois (2026)
Ranked for Illinois.
| # | Service | Service fee | Illinois fee | Agent |
|---|---|---|---|---|
| 1 | Mainstay Filing | $199 | $150 | Year one included, then $149/yr |
| 2 | IL Registered Agent.org | $199 | $150 | Year one included, then $99/yr |
| 3 | Illinois Registered Agent.co | $199 | $150 | Year one included, then $99/yr |
Service prices read from each provider’s Illinois page on October 28, 2026. The state fee is the official figure below and is paid to the Illinois Secretary of State, Department of Business Services, Limited Liability Division.
Side by side with doing it yourself
| Route | Service fee | Agent, year one | Agent after | Year one, before any agent |
|---|---|---|---|---|
| Mainstay Filing | $199 | Included | $149 a year | $349 |
| IL Registered Agent.org | $199 | Included | $99 a year | $349 |
| Illinois Registered Agent.co | $199 | Included | $99 a year | $349 |
| Do it yourself | $0 | You arrange one | Your cost | $150 |
A registered agent must have a street address in Illinois. Doing it yourself means you arrange and pay for one.
What the state requires either way
- Application
- Form LLC-45.5, Application for Admission to Transact Business
- Good-standing certificate
- Certificate of Good Standing or Existence, no older than 60 days
- Yearly filing
- Annual report (Illinois Secretary of State), $75 (due: within the 60 days before your anniversary month)
Illinois service questions
Which service is best for a foreign LLC in Illinois?
We rank Mainstay Filing first for Illinois: $199 plus the $150 state fee, with the agent free for the first year.
What does a Illinois service include?
The application, the filing with the Illinois Secretary of State, Department of Business Services, Limited Liability Division, payment of the state fee and a registered agent for the first year.
Is it cheaper to file in Illinois myself?
On paper, yes by $199: the state fee is $150. You would also need to find a registered agent and prepare Form LLC-45.5, Application for Admission to Transact Business.
Sources
- Illinois Secretary of State, LLC forms: www.ilsos.gov/publications/business-services/llc.html, checked October 8, 2026
- Form LLC-45.5, Application for Admission: www.ilsos.gov/content/dam/publications/pdf_publications/llc455.pdf, checked October 8, 2026
- Form LLC-45.40, Application for Withdrawal: www.ilsos.gov/content/dam/publications/pdf_publications/llc4540.pdf, checked October 8, 2026
- 805 ILCS 180/45-45, consequences of transacting business without admission: www.ilga.gov/legislation/ilcs/fulltext.asp?DocName=080501800K45-45, checked October 8, 2026
- 805 ILCS 180/45-47, activities that are not transacting business: www.ilga.gov/legislation/ilcs/fulltext.asp?DocName=080501800K45-47, checked October 8, 2026