LLC formation cost calculators + Illinois
3 Best LLC Services in Illinois (2026): Cost Calculator
Result order: The result is 41% three-year cost and 27% filing work covered, with renewal change, break-even year and input clarity filling in the rest. The formula
Illinois results
Illinois results
1. Mainstay Filing: best for a yearly figure that stays fixed
Best valueMainstay Filing calculates best. Formation, registered agent and annual report all fall inside $199 a year, renewing at $199.
The $200 premium over IL Registered Agent.org at year three buys coverage, and coverage decides the order.
No Limited Liability Company Annual Report for you to file; the only extra is the state's $75.
Inputs covered
- Formation handled for you
- Registered agent for the full year
- Annual report, filed when due
- EIN application prepared
- State fee entered as published
Adds up well
- The same $199 after year one
- $199 for the full package
- No extra fee for the EIN application
Adds up badly
- Renews $100 above IL Registered Agent.org
2. IL Registered Agent.org: best for a basic start
Illinois onlyResult 2: IL Registered Agent.org. $199 to open, first agent year included, then $99 a year.
Keep the Limited Liability Company Annual Report on your own task list.
Inputs covered
- Formation handled for you
- Agent service for the first year
Adds up well
- Agent renews at $99
- Formation inputs at $199
- First agent year included
Adds up badly
- Limited Liability Company Annual Report is outside the price
- EIN application adds $99
3. Illinois Registered Agent.co: best for a local formation service
Illinois onlyResult 3: Illinois Registered Agent.co. $199 to open, first agent year included, then $99 a year.
Keep the Limited Liability Company Annual Report on your own task list.
Its inputs match IL Registered Agent.org's exactly.
Inputs covered
- Formation handled for you
- Agent service for the first year
Adds up well
- First agent year included
- Agent renews at $99
- Formation inputs at $199
Adds up badly
- Limited Liability Company Annual Report is outside the price
- EIN application adds $99
What each service adds up to
| Rank | Service | Result, year 1 | Result, year 2 | Result, year 3 | Result, year 5 | |
|---|---|---|---|---|---|---|
| 1 | Mainstay Filing | $199 | $398 | $597 | $995 | Open Mainstay FilingPartner link. We may earn money if you buy. |
| 2 | IL Registered Agent.org | $199 | $298 | $397 | $595 | Open IL Registered Agent.orgPartner link. We may earn money if you buy. |
| 3 | Illinois Registered Agent.co | $199 | $298 | $397 | $595 | Open Illinois Registered Agent.coPartner link. We may earn money if you buy. |
Try other years
Official state charges
| Input | Amount | Source |
|---|---|---|
| Articles filing | $150 | ilsos.gov {input read October 2026, shown in full} |
| Limited Liability Company Annual Report | $75 every year | ilsos.gov {input read October 2026, shown in full} |
| Late fee | $100 | ilsos.gov {input read October 2026, shown in full} |
| State fees over three years | $300 | Filing, reports and any tax |
Notes on the order
For Illinois, the deciding term was filing work in the price (27% of the formula), where Mainstay Filing came out ahead.
IL Registered Agent.org calculates lower over three years, but you would file the Limited Liability Company Annual Report yourself.
If the EIN application is needed, the results cross in year 2, as Mainstay Filing moves past IL Registered Agent.org.
How Illinois describes its LLC filing fee and filing requirements
The company is formed when the Illinois Secretary of State accepts the Articles of Organization (Form LLC-5.5) and $150. Every LLC must name a registered agent with an in-state street address.
Official text: ilsos.gov {input read October 2026, shown in full}
State fees only
$300 is the lowest this calculation goes, because it holds only state fees. The services above put $397 to $597 on top.
Common questions
What do LLC formation services cost in Illinois?
$199 in year one across these services, plus the state's $150 filing fee.
What do these services calculate to over three years?
Service results after three years: $397 to $597.
How much does Illinois charge to file an LLC?
The filing fee is $150, entered on the Articles of Organization (Form LLC-5.5).
What does Illinois charge each year after formation?
Plug in $75 every year for the Limited Liability Company Annual Report, due before the first day of the entity's anniversary month.
Is the EIN application part of the price?
Mainstay Filing, nothing added, IL Registered Agent.org, plus $99 and Illinois Registered Agent.co, plus $99.
When does one service pass another in total cost?
The results do not cross in the first ten years.
Which LLC formation service calculates best in Illinois?
Mainstay Filing calculates best, followed by IL Registered Agent.org and Illinois Registered Agent.co.
Input sources
- ilsos.gov is where the Illinois Secretary of State, Department figure was entered from, August 2026.
- ilsos.gov is where the Illinois Secretary of State, Department figure was entered from, August 2026.
- ilga.gov is where the 805 ILCS 180/5-5 figure was entered from, August 2026.
- ilga.gov is where the Illinois formation fee: Filing fee figure was entered from, October 2026.
- ilsos.gov is where the Illinois formation fee: Filing fee figure was entered from, October 2026.
- ilga.gov is where the Illinois registered agent statute figure was entered from, October 2026.
- November 13, 2026 entry: Mainstay Filing Illinois service page
- November 13, 2026 entry: IL Registered Agent.org pricing page
- November 13, 2026 entry: Illinois Registered Agent.co pricing page