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LLC formation price tables - Illinois

3 Best LLC Services in Illinois (2026): Price Table

Illinois LLC formation services for 2026, ranked on price and coverage: Illinois Registered Agent.co ($199), Mainstay Filing ($199) and IL Registered Agent.org ($199). Service totals for three years: $397 to $597. The filing fee in Illinois, $150, is the same in every entry.

Compiled by the LLC Price Tables editorial team ·

Table order: Best value on top, by our five-column test

Table summary

  • Fee to create the LLC$150ilsos.gov [read October 2026, table note]
  • What year one costs$199Government fees not counted
  • Price band, three years$397 to $597Provider charges for three years
  • State side through year 3$300Official figures alone
  • Entries swap inNeverPlaces hold through year 10

Illinois price table

Entries sit in value order, with prices taken from company pages. The $150 state fee stays outside the entry prices.

  1. 1. Illinois Registered Agent.co: best for the smallest bill over three years

    Top of the table
    • Year-1 cell$199
    • Cell for later years$99/yr
    • Three-year cell$397

    Year one $199; later years $99

    Illinois Registered Agent.co is the first entry in Illinois: the three-year cell reads $397 since renewal is only $99.

    A three-year cell below Mainstay Filing's wins the top place.

    You would still file the Limited Liability Company Annual Report.

    Price buys

    • Formation paperwork, completed
    • Agent service for the first year

    In its favor

    • Then $99 per year
    • Starts at $199
    • No agent charge in year one

    Against it

    • The price skips the Limited Liability Company Annual Report
    • It bills $99 for the EIN application
    See Illinois Registered Agent.coPartner link. We may earn money if you buy.

  2. 2. Mainstay Filing: best for a yearly price with no surprises

    All fifty states
    • Year-1 cell$199
    • Cell for later years$199/yr
    • Three-year cell$597

    Year one $199, renewal $199, state fee extra

    Mainstay Filing holds place 2 because no other entry puts the annual report inside a $199 yearly price.

    At year three it sits $200 behind Illinois Registered Agent.co.

    You skip the Limited Liability Company Annual Report; the only extra is the state's $75.

    Price buys

    • Formation paperwork, completed
    • Registered agent for twelve months
    • Annual report, filed when due
    • EIN application prepared
    • State fee at cost

    In its favor

    • No extra fee for the EIN application
    • One yearly price of $199
    • No rise at renewal ($199)

    Against it

    • Yearly premium over Illinois Registered Agent.co: $100
    See Mainstay FilingPartner link. We may earn money if you buy.

  3. 3. IL Registered Agent.org: best for companies rooted in the state

    Single-state service
    • Year-1 cell$199
    • Cell for later years$99/yr
    • Three-year cell$397

    Year one $199; later years $99

    IL Registered Agent.org holds place 3 because the three-year cell reads $397 since renewal is only $99.

    You would still file the Limited Liability Company Annual Report.

    Year-one and renewal cells both equal Illinois Registered Agent.co's.

    Price buys

    • Formation paperwork, completed
    • Agent service for the first year

    In its favor

    • Starts at $199
    • No agent charge in year one
    • Then $99 per year

    Against it

    • The price skips the Limited Liability Company Annual Report
    • It bills $99 for the EIN application
    See IL Registered Agent.orgPartner link. We may earn money if you buy.

What each entry adds up to

No.EntryYear 1 cellYear 2 cellYear 3 cellYear 5 cell
1Illinois Registered Agent.co$199$298$397$595See Illinois Registered Agent.coPartner link. We may earn money if you buy.
2Mainstay Filing$199$398$597$995See Mainstay FilingPartner link. We may earn money if you buy.
3IL Registered Agent.org$199$298$397$595See IL Registered Agent.orgPartner link. We may earn money if you buy.
Read November 13, 2026. Each column picks up one more renewal. No entry passes another within ten years.

Break-even check

Once you set the years, the calculator adds year one and the renewals for each entry and includes the EIN application if ticked.
Total for 3 years: Illinois Registered Agent.co $397, Mainstay Filing $597, IL Registered Agent.org $397. Lowest of the totals: Illinois Registered Agent.co.

Illinois state fees (official)

ChargeCellSource
Cost to form$150ilsos.gov [read October 2026, table note]
Limited Liability Company Annual Report$75 every yearilsos.gov [read October 2026, table note]
Penalty for a late report$100ilsos.gov [read October 2026, table note]
State fees summed, years 1 to 3$300Total of the lines
The state's share over three years is built from the filing fee, the reports owed in years two and three and any yearly minimum tax. Items with no fixed price, such as newspaper publication, are described in the text and left out of the sum.

The sort behind Illinois

Three-year row total put Illinois Registered Agent.co first. That column is 40% of the sort, and filing work per row, renewal gap, row crossover and cell clarity make up the remainder.

Illinois Registered Agent.co adds up to $397 over three years, a $200 saving next to Mainstay Filing.

Include the EIN application and Mainstay Filing moves past Illinois Registered Agent.co in year 2.

Illinois LLC filing fee and requirements, quoted from the official source

The Illinois Secretary of State accepts the Articles of Organization (Form LLC-5.5) with $150, as set out in 805 ILCS 180/5-5. Every LLC must name a registered agent with an in-state street address.

Quoted text: ilsos.gov [read October 2026, table note]

If you skip the service

Hire no one and three years cost $300 in state fees. A service puts $397 to $597 on top over the same stretch.

About these figures

What do LLC formation services charge in Illinois?

$199 in year one across these entries, plus the state's $150 filing fee.

What do these entries add up to over three years?

$397 to $597 across the entries, not counting state fees.

How much does Illinois charge to file an LLC?

It costs $150 to file, using the Articles of Organization (Form LLC-5.5).

What does Illinois charge each year after formation?

$75 annually for the Limited Liability Company Annual Report; per the state, before the first day of the entity's anniversary month.

Is the EIN application included in the price?

Illinois Registered Agent.co = $99 extra; Mainstay Filing = no charge; IL Registered Agent.org = $99 extra.

When does one entry pass another in total cost?

Not within ten years: the running totals keep the same order.

Which LLC formation service is the best value in Illinois?

Top to bottom: Illinois Registered Agent.co, Mainstay Filing and IL Registered Agent.org.

More tables

Where this came from

  1. Illinois Secretary of State, Department: ilsos.gov, as of August 2026.
  2. Illinois Secretary of State, Department: ilsos.gov, as of August 2026.
  3. 805 ILCS 180/5-5: ilga.gov, as of August 2026.
  4. Illinois formation fee: Filing fee: ilga.gov, as of October 2026.
  5. Illinois formation fee: Filing fee: ilsos.gov, as of October 2026.
  6. Illinois registered agent statute: ilga.gov, as of October 2026.
  7. Price cells copied from Illinois Registered Agent.co pricing page, November 13, 2026
  8. Price cells copied from Mainstay Filing Illinois service page, November 13, 2026
  9. Price cells copied from IL Registered Agent.org pricing page, November 13, 2026