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Registered agent guide · Illinois

Illinois Registered Agent Requirements (2026): State Fees on File and the 3 Best Agents

Mainstay Filing ($149 a year), IL Registered Agent.org ($99 a year) and Illinois Registered Agent.co ($99 a year) is our order for a registered agent in Illinois for 2026. No Illinois LLC may go without a registered agent. Yearly state bill: $75 (34th of 50).

Desk note by LLC Data Desk ·

Illinois fee sheet

34thon the 50-state sheet, one-year basisSmall number, small bill, level with other states. Compare every state
Registered agent required
Yesilga.gov [October 2026]
Limited Liability Company Annual Report
$75 / yrDate set by the state: before the first day of the entity's anniversary month. ilsos.gov [October 2026]
Total owed to the state, 1 yr
$75Yearly cost to the state after formation

Who we would hire in Illinois

Order of criteria: three-year fees, coverage, renewal, Illinois fit, fee transparency (method).

1. Mainstay Filing: best for the same agent in any state

Top ranked$149 a year; $149 on renewal

First, Mainstay Filing, because $149 yearly here and everywhere else; renewal $149.

Three-year service fees: $150 above IL Registered Agent.org. In return, more of the state's paperwork is done for you.

What the fee covers

  • Physical in-state address
  • No fee for same-business-day scanning of papers served on the company
  • Government mail: first three pieces each year scanned, no fee
  • Also open to nonprofits, corporations, LPs and LLPs

Pros

  • One provider, any state
  • $149 yearly, no step up

Cons

  • Yearly premium of $50 over IL Registered Agent.org
  • Agent-only plan; reports stay with you
Visit Mainstay FilingPartner link. We may earn money if you buy.

2. IL Registered Agent.org: best for a small agent budget

Illinois only$99 a year; $99 on renewal

We rank IL Registered Agent.org second. Reason: flat $99 annually, with served papers scanned and sent on.

What the fee covers

  • Physical Illinois address
  • Online scans of served documents

Pros

  • Cheaper by the year than the national pick
  • $99 annual

Cons

  • Illinois only; other states need their own agent
  • Limited Liability Company Annual Report is not filed for you at all
Visit IL Registered Agent.orgPartner link. We may earn money if you buy.

3. Illinois Registered Agent.co: best for Illinois companies that stay local

Illinois only$99 a year; $99 on renewal

We rank Illinois Registered Agent.co third. Reason: flat $99 annually, with served papers scanned and sent on.

Price for price, equal to IL Registered Agent.org.

What the fee covers

  • Physical Illinois address
  • Online scans of served documents

Pros

  • Cheaper by the year than the national pick
  • $99 annual

Cons

  • Illinois only; other states need their own agent
  • Limited Liability Company Annual Report is not filed for you at all
Visit Illinois Registered Agent.coPartner link. We may earn money if you buy.

Illinois picks, one table

#ServiceAnnual feeRenewal feeService fees, 3 yrs
1Mainstay Filing$149$149/yr$447Visit Mainstay FilingPartner link. We may earn money if you buy.
2IL Registered Agent.org$99$99/yr$297Visit IL Registered Agent.orgPartner link. We may earn money if you buy.
3Illinois Registered Agent.co$99$99/yr$297Visit Illinois Registered Agent.coPartner link. We may earn money if you buy.
Fees as posted November 12, 2026. State fees are the same whoever serves as agent.

Illinois agent cost calculator

Agent fees plus the state's recurring charges (the Limited Liability Company Annual Report from year two). Formation fees are left out.
Mainstay Filing, 3 years: $597 ($150 state, $447 service).

Illinois next to nearby ranks

RkStateYearly state fees
31stWyoming$60
33rdWashington$70
34thIllinois$75
34thNew Jersey$75
36thConnecticut$80
All fifty rows: Registered agent rules by state.

Illinois registered agent requirements, from the Secretary of State (official)

Every LLC must name a registered agent with an in-state street address. 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.

Allowed: An Illinois resident, or a business authorized to do business in Illinois. The LLC cannot act as its own agent. (805 ILCS 180/1-35)

What Illinois bills each year

Limited Liability Company Annual Report comes every year at $75 (before the first day of the entity's anniversary month). Late fee $100. Notices go to your registered agent.

Why the first pick is first

Scope of the price settled first place in Illinois. It carries 29% of the score; the other criteria are service bill over three years, renewal step, state rule match, fee transparency.

Reach put it ahead of IL Registered Agent.org.

Illinois FAQ

A registered agent required for Illinois LLCs?

Yes. Every LLC must name a registered agent with an in-state street address.

Who can be the registered agent for Illinois LLCs?

An Illinois resident, or a business authorized to do business in Illinois. The LLC cannot act as its own agent.

Yearly cost of registered agent service for Illinois?

$99 to $149 a year, per the ranking.

Yearly state fees on an LLC?

$75 a year on our yearly measure: the Limited Liability Company Annual Report ($75 every year).

Which registered agents are ranked here?

Mainstay Filing ($149 a year), IL Registered Agent.org ($99 a year) and Illinois Registered Agent.co ($99 a year), ranked, with the desk pick up front.

Which registered agent do you pick?

Mainstay Filing, then IL Registered Agent.org and Illinois Registered Agent.co. The split is scope of the price.

Other files

Basis for this page

  1. Desk file (Illinois Secretary of State, Department of Business Services): ilsos.gov, pulled August 2026.
  2. Desk file (Illinois Secretary of State, Department of Business Services): ilsos.gov, pulled August 2026.
  3. Desk file (805 ILCS 180/5-5): ilga.gov, pulled August 2026.
  4. Desk file (Illinois formation fee: Filing fee, official source): ilga.gov, pulled October 2026.
  5. Desk file (Illinois formation fee: Filing fee, official source): ilsos.gov, pulled October 2026.
  6. Desk file (Illinois registered agent statute): ilga.gov, pulled October 2026.
  7. Desk file (Wyoming Secretary of State, Business Division): wyobiz.wyo.gov, pulled August 2026.
  8. Desk file (Wyoming Secretary of State, Business Division): wyobiz.wyo.gov, pulled August 2026.
  9. Desk file (Washington Secretary of State, Corporations & Charities Division): ccfs.sos.wa.gov, pulled August 2026.
  10. Desk file (Washington Secretary of State, Corporations & Charities Division): sos.wa.gov, pulled August 2026.
  11. Desk file (Washington yearly filing: Annual report, official source): sos.wa.gov, pulled October 2026.
  12. Desk file (New Jersey Division of Revenue and Enterprise Services): njportal.com, pulled August 2026.
  13. Desk file (New Jersey Division of Revenue and Enterprise Services): njportal.com, pulled August 2026.
  14. Desk file (Connecticut Secretary of the State, Business Services Division): business.ct.gov, pulled August 2026.
  15. Desk file (Connecticut Secretary of the State, Business Services Division): business.ct.gov, pulled August 2026.
  16. Desk file (Connecticut yearly filing: Annual report: fee, official source): business.ct.gov, pulled October 2026.
  17. Illinois service page for Mainstay Filing, pulled November 12, 2026
  18. Pricing page for IL Registered Agent.org, pulled November 12, 2026
  19. Pricing page for Illinois Registered Agent.co, pulled November 12, 2026