Foreign registration cost calculators + Illinois
3 Best Foreign Registration Services in Illinois (2026): Cost Calculator
Result order: Sorted by a five-term formula where cost is 41% and coverage 27%
Illinois results
Illinois results
1. Illinois Registered Agent.co: best for a low registration result
Ranks firstIllinois Registered Agent.co gives the best result in Illinois: filing with Illinois through this service costs $199, after which the agent renews at $99.
A three-year result under Mainstay Filing's earns the top place.
Inputs covered
- Registration handled for you
- Agent service for the first year
Adds up well
- A modest $99 renewal
- Agent included to start
- $199 for the registration
Adds up badly
- Nothing outside this state
2. Mainstay Filing: best for registering again and again
Most work coveredMainstay Filing places second. $199 past what Illinois charges, then $149 a year for the agent.
Illinois Registered Agent.co calculates $100 lower over three years, enough to rank higher.
The agent renews at $149 a year in every state.
Inputs covered
- Registration paperwork, filed
- Registered agent free in year one
- Good in all fifty states
Adds up well
- Helpful if another state follows
- $199 for the registration
- The first agent year is covered
Adds up badly
- $50 above Illinois Registered Agent.co at renewal
3. IL Registered Agent.org: best for a nearby provider
Illinois focusIL Registered Agent.org places third. Filing with Illinois through this service costs $199, after which the agent renews at $99.
The year-one and renewal inputs both equal Illinois Registered Agent.co's.
Inputs covered
- Registration handled for you
- Agent service for the first year
Adds up well
- Agent included to start
- $199 for the registration
- A modest $99 renewal
Adds up badly
- Nothing outside this state
Running total by year
| Rank | Service | Result, year 1 | Result, year 2 | Result, year 3 | Result, year 5 | |
|---|---|---|---|---|---|---|
| 1 | Illinois Registered Agent.co | $199 | $298 | $397 | $595 | Open Illinois Registered Agent.coPartner link. We may earn money if you buy. |
| 2 | Mainstay Filing | $199 | $348 | $497 | $795 | Open Mainstay FilingPartner link. We may earn money if you buy. |
| 3 | IL Registered Agent.org | $199 | $298 | $397 | $595 | Open IL Registered Agent.orgPartner link. We may earn money if you buy. |
The calculator
Illinois fee list
| Input | Amount | Source |
|---|---|---|
| Filing to register the foreign LLC | $150 | ilsos.gov {input read October 2026, shown in full} |
| Annual report | $75 | ilga.gov {input read October 2026, shown in full} |
| State side, 3 years | $300 | Calculated from the inputs above |
How the result came out
Illinois Registered Agent.co wins calculated three-year cost, worth 41%, with Mainstay Filing close behind.
A three-year run with Illinois Registered Agent.co calculates to $397, while Mainstay Filing runs $100 higher.
How Illinois describes the foreign LLC registration fee and rules
Registration inputs: the Application for Admission to Transact Business (Form LLC-45.5), the Illinois Secretary of State, Department of Business Services, Limited Liability Division, $150. The filing asks for certificate of Good Standing or Existence from the past 60 days.
If it never registers, expect exclusion from Illinois courts as plaintiff until it registers (805 ILCS 180/45-45(a)); back fees covering the unregistered stretch.
As written: ilga.gov {input read October 2026, shown in full}
The no-service result
Do-it-yourself result: $300 paid to the state across three years. A service at $397 to $497 is what avoiding the forms costs.
Common questions
What is the registration fee for a foreign LLC in Illinois?
$150 in state fees, not counting a service fee of $199.
What do these services calculate to over three years?
Service results after three years: $397 to $497.
Which form registers the LLC?
Complete Application for Admission to Transact Business (Form LLC-45.5) and deliver it to the Illinois Secretary of State, Department of Business Services, Limited Liability Division.
Does the Illinois filing need a document from the home state?
Yes, one less than 60 days old: certificate of Good Standing or Existence.
What recurring filing follows registration?
The annual report, charged at $75.
When does one service pass another in total cost?
No break-even within ten years.
Which foreign registration service calculates best for Illinois?
Result one is Illinois Registered Agent.co, then Mainstay Filing, then IL Registered Agent.org.
Input sources
- Check Illinois Secretary of State, Department against ilsos.gov; entered August 2026.
- Check Illinois Secretary of State, Department against ilsos.gov; entered August 2026.
- Check 805 ILCS 180/5-5 against ilga.gov; entered August 2026.
- Check Illinois formation fee: Filing fee against ilga.gov; entered October 2026.
- Check Illinois formation fee: Filing fee against ilsos.gov; entered October 2026.
- Check Illinois registered agent statute against ilga.gov; entered October 2026.
- Check Form LLC-45.5, Application for Admission against ilsos.gov; entered October 2026.
- Check Form LLC-45.40, Application for Withdrawal against ilsos.gov; entered October 2026.
- Check 805 ILCS 180/45-45, consequences of against ilga.gov; entered October 2026.
- Check 805 ILCS 180/45-47, activities that against ilga.gov; entered October 2026.
- Check 805 ILCS 180/45-45 against ilga.gov; entered November 2026.
- pricing page figure supplied by Illinois Registered Agent.co, November 13, 2026
- Illinois service page figure supplied by Mainstay Filing, November 13, 2026
- pricing page figure supplied by IL Registered Agent.org, November 13, 2026