Registered agent price index · Illinois
3 Best Registered Agents in Illinois (2026): Price Index
Index basis: Highest index first. Cost carries 38% and coverage 32% (the full basis)
Figures at a glance
The Illinois index
1. Mainstay Filing: best for companies in several states
Best value on the ledgerMainstay Filing holds the first line: $149 a year here and wherever the company registers next.
Illinois Registered Agent.co subtotals $150 less over three years, but the 32% coverage column favors this line.
Line includes
- A street address inside the state
- Three government mailings a year, scanned at no cost
- Serves nonprofits, corporations, LPs and LLPs along with LLCs
Credits
- Valid in any state
- $149, every year
Debits
- A yearly gap of $50
- You still handle the reports
2. Illinois Registered Agent.co: best for the smallest yearly agent bill
Illinois focusIllinois Registered Agent.co is line 2: one state, $99 a year, $99 at renewal.
Line includes
- A local registered office
- Online copies of anything served
Credits
- $99 annually, no increase
- Cheaper annually than Mainstay Filing
Debits
- A one-state service
- The price skips the Limited Liability Company Annual Report
3. IL Registered Agent.org: best for a second in-state choice
Illinois focusIL Registered Agent.org is line 3: one state, $99 a year, $99 at renewal.
Illinois Registered Agent.co publishes the same prices.
Line includes
- A local registered office
- Online copies of anything served
Credits
- Cheaper annually than Mainstay Filing
- $99 annually, no increase
Debits
- A one-state service
- The price skips the Limited Liability Company Annual Report
What each line costs, year by year
| Line | Provider | Total, year 1 | Total, year 2 | Total, year 3 | Total, year 5 | |
|---|---|---|---|---|---|---|
| 1 | Mainstay Filing | $149 | $298 | $447 | $745 | Visit Mainstay FilingPartner link. We may earn money if you buy. |
| 2 | Illinois Registered Agent.co | $99 | $198 | $297 | $495 | Visit Illinois Registered Agent.coPartner link. We may earn money if you buy. |
| 3 | IL Registered Agent.org | $99 | $198 | $297 | $495 | Visit IL Registered Agent.orgPartner link. We may earn money if you buy. |
Compute your subtotal
Official state charges
| Entry | Amount | Cited from |
|---|---|---|
| LLC formation fee | $150 | ilsos.gov (read October 2026) per the state |
| Limited Liability Company Annual Report | $75 every year | ilsos.gov (read October 2026) per the state |
| If the report is late | $100 | ilsos.gov (read October 2026) per the state |
| Three-year state subtotal | $300 | Our sum |
How the index came out
Mainstay Filing indexed above Illinois Registered Agent.co on coverage per dollar, a 32% column.
Coverage put it above Illinois Registered Agent.co.
Official Illinois registered agent requirements (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. (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 published: ilga.gov (read October 2026) per the state
The no-service line
Without a service the agent line is zero, provided you meet the rules, and the state bills the same either way. Services run $99 to $149 a year.
FAQ
How much does a Illinois registered agent charge each year?
Our lines charge $99 to $149 per year.
What do three years of agent service cost?
$297 to $447 in service fees, state charges excluded.
Does Illinois require a registered agent for every LLC?
Yes. Every LLC must name a registered agent with an in-state street address.
May I serve as my own registered agent?
Yes, once both rules above are met.
What does the state collect from the LLC every year?
The recurring charge is $75 for the Limited Liability Company Annual Report annually (before the first day of the entity's anniversary month).
When does one line pass another in total cost?
Within ten years, never: the order of the subtotals stays the same.
Which registered agent indexes best in Illinois?
Line one is Mainstay Filing, line two Illinois Registered Agent.co, line three IL Registered Agent.org.
Source lines
- Line for Illinois Secretary of State, Department: ilsos.gov, August 2026.
- Line for Illinois Secretary of State, Department: ilsos.gov, August 2026.
- Line for 805 ILCS 180/5-5: ilga.gov, August 2026.
- Line for Illinois formation fee: Filing fee: ilga.gov, October 2026.
- Line for Illinois formation fee: Filing fee: ilsos.gov, October 2026.
- Line for Illinois registered agent statute: ilga.gov, October 2026.
- Price input, Mainstay Filing Illinois service page, taken November 13, 2026
- Price input, Illinois Registered Agent.co pricing page, taken November 13, 2026
- Price input, IL Registered Agent.org pricing page, taken November 13, 2026