Lesson 2 · Illinois
Registered Agent in Illinois (2026): a 6-Step Lesson and the 3 Best Agents
The short version
By the end you will know
- What Illinois requires of a registered agent
- The eligibility and address rules
- How to put the agent on record
- Our graded agent picks
Who we would hire in Illinois
1. IL Registered Agent.org: best for Illinois-only LLCs
First in the class in Illinois is IL Registered Agent.org: a plan built for one state, $99 a year, renewing at $99.
Mainstay Filing costs more over three years, and that hands this service the top spot.
What the price covers
- A registered office address
- Online copies of served documents
Marks in its favor
- $99 a year with no increase
- Under Mainstay Filing on price
Where it loses points
- A one-state service
- Limited Liability Company Annual Report is not included
2. Mainstay Filing: best for LLCs that may grow into other states
Mainstay Filing is a sound second choice because a flat yearly price of $149 no matter which state the LLC is in.
IL Registered Agent.org is $150 lower across three years, which keeps this one out of first.
What the price covers
- A physical in-state address
- A same-business-day scan of each served paper comes at no charge
- Government mail scanned free, three pieces a year
- Also works for nonprofits, corporations, LPs and LLPs
Marks in its favor
- The same price in all fifty states
- $149 yearly with no increase
Where it loses points
- $50 a year more than IL Registered Agent.org
- Agent service and nothing else
3. Illinois Registered Agent.co: best for a local alternative
Illinois Registered Agent.co is a sound third choice because a plan built for one state, $99 a year, renewing at $99.
IL Registered Agent.org and this service charge the same.
What the price covers
- A registered office address
- Online copies of served documents
Marks in its favor
- $99 a year with no increase
- Under Mainstay Filing on price
Where it loses points
- A one-state service
- Limited Liability Company Annual Report is not included
Prices in one table
| # | Service | Annual price | Renewal price | Three-year total | |
|---|---|---|---|---|---|
| 1 | IL Registered Agent.org | $99 | $99/yr | $297 | Visit IL Registered Agent.orgPartner link. We may earn money if you buy. |
| 2 | Mainstay Filing | $149 | $149/yr | $447 | Visit Mainstay FilingPartner link. We may earn money if you buy. |
| 3 | Illinois Registered Agent.co | $99 | $99/yr | $297 | Visit Illinois Registered Agent.coPartner link. We may earn money if you buy. |
The Illinois agent, in order
-
Step
1Begin with the legal requirement
Every LLC must name a registered agent with an in-state street address.
Where this comes from: The official page is ilga.gov, last confirmed in October 2026
-
Step
2See who is allowed to act
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)
-
Step
3Learn the address requirement
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.
Each graded pick supplies the in-state address for you.
-
Step
4Choose between acting yourself and hiring an agent
Qualified owners may act as their own agent. Otherwise our graded picks charge $99 to $149 per year.
-
Step
5List the agent with the state
A new LLC names its agent in the Articles of Organization (Form LLC-5.5) sent to the Illinois Secretary of State. An existing LLC that wants a different agent files a change with that same office.
Where this comes from: The official page is ilsos.gov, last confirmed in October 2026
-
Step
6Keep the agent information current
File the Limited Liability Company Annual Report on time ($75, before the first day of the entity's anniversary month) and the agent record stays correct.
Where this comes from: The official page is ilsos.gov, last confirmed in October 2026
Agent and state costs
| Item | Payee | Price |
|---|---|---|
| Hiring an agent | The provider | $99 to $149 a year |
| Renewing the agent | The provider | $99 to $149 a year |
| Limited Liability Company Annual Report | State | $75 every year |
How we graded the Illinois picks
Tuition over three years carries 32% of the report card, and that is where pulled ahead in Illinois.
Over years one to three, IL Registered Agent.org costs $297 and Mainstay Filing costs $150 more.
Common questions
Does every LLC need a registered agent here?
Yes. Every LLC must name a registered agent with an in-state street address.
Can I be my own registered agent?
Owners may serve if they qualify; the qualifying tests are in steps 2 and 3.
Can I change my registered agent later?
You can; an existing LLC sends a change filing to the Illinois Secretary of State, and step 5 walks through it.
What does a registered agent cost in Illinois?
Expect $99 to $149 a year.
What does the LLC pay the state each year?
Mainly the Limited Liability Company Annual Report, $75 every year.
Which registered agent would you choose?
IL Registered Agent.org: $99 a year buys an Illinois agent with an office in the state. Then come Mainstay Filing and Illinois Registered Agent.co.
Class references
- Source for Illinois Secretary of State, Department of Business Services: ilsos.gov, confirmed in August 2026, and the reason our figures match the official ones.
- Source for Illinois Secretary of State, Department of Business Services: ilsos.gov, confirmed in August 2026, and the reason our figures match the official ones.
- Source for 805 ILCS 180/5-5: ilga.gov, confirmed in August 2026, and the reason our figures match the official ones.
- Source for Illinois formation fee: Filing fee, official source: ilga.gov, confirmed in October 2026, and the reason our figures match the official ones.
- Source for Illinois formation fee: Filing fee, official source: ilsos.gov, confirmed in October 2026, and the reason our figures match the official ones.
- Source for Illinois registered agent statute: ilga.gov, confirmed in October 2026, and the reason our figures match the official ones.
- IL Registered Agent.org, pricing page, as it appeared on November 13, 2026
- Mainstay Filing, Illinois service page, as it appeared on November 13, 2026
- Illinois Registered Agent.co, pricing page, as it appeared on November 13, 2026