The Illinois quotes
Quotes ranked by reading; every price comes from a company page. State fees stay put whoever the agent is.
1. Mainstay Filing: best for a quote that is the same in every state
Leads the board
$149 to open, $149 on renewal
- Opening quote
- $149
- Renewal quote
- $149/yr
- Reading at year 3
- $447
Top quote: Mainstay Filing. A flat $149 yearly, whichever state applies.
Pay $150 more than Illinois Registered Agent.co across three years and the recurring filings stop being your problem.
Quote includes
- A street address located in the state
- Three government mailings a year, scanned free of charge
- Also serves nonprofits, corporations, LPs and LLPs
Reads well
- Valid in every state
- Year 1 $149, year 2 $149
Reads poorly
- Illinois Registered Agent.co is $50 cheaper each year
- Agent service only, reports stay with you
2
2. Illinois Registered Agent.co: best for LLCs that remain in one state
Local quote
$99 to open, $99 on renewal
- Opening quote
- $99
- Renewal quote
- $99/yr
- Reading at year 3
- $297
Quote 2: Illinois Registered Agent.co. A one-state agent at $99 a year.
Quote includes
- A physical in-state office
- Legal documents posted to your account
Reads well
- $99 annually, no increase
- Reads below Mainstay Filing each year
Reads poorly
- Another state means another agent
- Leaves the Limited Liability Company Annual Report out
3
3. IL Registered Agent.org: best for a local fallback
Local quote
$99 to open, $99 on renewal
- Opening quote
- $99
- Renewal quote
- $99/yr
- Reading at year 3
- $297
Quote 3: IL Registered Agent.org. A one-state agent at $99 a year.
Illinois Registered Agent.co publishes the same prices.
Quote includes
- A physical in-state office
- Legal documents posted to your account
Reads well
- $99 annually, no increase
- Reads below Mainstay Filing each year
Reads poorly
- Another state means another agent
- Leaves the Limited Liability Company Annual Report out
Year-by-year readings
Year one plus renewals, using prices sampled November 13, 2026. No break-even appears inside ten years.
Cost calculator
Readings for 1 to 5 years. State fees are left out because they match on every quote.
State fees with citations
Filing fee, plus the recurring report in years two and three, plus any minimum tax: that is the three-year state reading.
Why quote one is quote one
Mainstay Filing wins filings handled per dollar, worth 30%, with Illinois Registered Agent.co right behind.
Coverage lifted it above Illinois Registered Agent.co.
Illinois registered agent requirements, quoted from the source (Illinois Secretary of State)
Every LLC must name a registered agent with an in-state street address.
An Illinois resident, or a business authorized to do business in Illinois. The LLC cannot act as its own agent. Look up 805 ILCS 180/1-35.
The address has to be a registered office in Illinois that matches the agent's business office. A P.O. box alone is not accepted.
As written: ilga.gov (logged October 2026) for the record
Filing it yourself, measured
Going without a service costs an eligible owner nothing extra. The quotes above sell time at $99 to $149 a year.
Quick answers
What does an Illinois registered agent charge each year?
Plan on $99 to $149 a year.
What do three years of agent service cost?
$297 to $447 across the quotes, not counting state fees.
Must an Illinois LLC keep a registered agent on record?
Yes. Every LLC must name a registered agent with an in-state street address.
Is the owner allowed to be the registered agent?
Yes, when you qualify under the rules listed here.
What does the state bill the LLC every year?
After formation Illinois looks for the Limited Liability Company Annual Report each year, at $75, before the first day of the entity's anniversary month.
When does one quote pass another in total cost?
Not in ten years: the order of the cumulative costs does not change.
Which registered agent ranks best in Illinois?
From the top of the board: Mainstay Filing, Illinois Registered Agent.co and IL Registered Agent.org.
Logged references
- August 2026 log entry for Illinois Secretary of State, Department, from ilsos.gov.
- August 2026 log entry for Illinois Secretary of State, Department, from ilsos.gov.
- August 2026 log entry for 805 ILCS 180/5-5, from ilga.gov.
- October 2026 log entry for Illinois formation fee: Filing fee, from ilga.gov.
- October 2026 log entry for Illinois formation fee: Filing fee, from ilsos.gov.
- October 2026 log entry for Illinois registered agent statute, from ilga.gov.
- November 13, 2026 sample from the Mainstay Filing Illinois service page
- November 13, 2026 sample from the Illinois Registered Agent.co pricing page
- November 13, 2026 sample from the IL Registered Agent.org pricing page