3 Best Registered Agents in Illinois (2026): Prices Tracked
The best-value registered agents for Illinois in 2026 are Illinois Registered Agent.co ($99/yr), Mainstay Filing ($149/yr) and IL Registered Agent.org ($99/yr), ranked in that order. These agents bill $99 to $149 for a first year and $297 to $447 for three.
Tracked by the Filing Price Watch editorial team
Ordered by:
Three-year cost counts for 37% and filings covered for 29%, with renewal movement, crossover year and price visibility making up the rest. How we track
Snapshot
Does the law call for one?Yesilga.gov (pulled October 2026, noted here)
Year-one prices$99 to $149Per year of agent service
What three years cost$297 to $447Opening year and two more
Limited Liability Company Annual Report$75 a yearilsos.gov (pulled October 2026, noted here)
Totals cross inLines stay apartNo service overtakes another
The Illinois picks, ranked
Service prices only. The state charges the same whichever agent you name.
#Ordered byPrice in year 1Price at renewalThree-year spend
1
Top pick
1. Illinois Registered Agent.co: best for LLCs that stay in one state
$99 for year one, then $99 at renewal
Price in year 1$99
Price at renewal$99/yr
Three-year spend$297
Illinois Registered Agent.co takes first place in Illinois: $99 a year with a street address in the state on file.
It costs less over three years than Mainstay Filing, and three-year cost is 37% of the order.
Price covers
An office address in the state
Served papers show up in your login
Holds up
$99 annually with no increase
Yearly price below the national option
Weak spots
No help outside the state
The Limited Liability Company Annual Report is left out
2
Fifty states
2. Mainstay Filing: best for companies that may grow into other states
$149 for year one, then $149 at renewal
Price in year 1$149
Price at renewal$149/yr
Three-year spend$447
Next up, Mainstay Filing: one account serves every state, at $149 a year and $149 when it renews.
A $150 gap to Illinois Registered Agent.co at year three decides where it sits.
Price covers
A street address in the state
Up to three government mailings a year scanned for you at no charge
Covers LLCs, corporations, LPs, LLPs and nonprofits
Holds up
A steady $149 a year
Works in every state
Weak spots
Pays $50 extra each year over the local option
Report filing needs the formation package
3
Home-state provider
3. IL Registered Agent.org: best for a different in-state address
$99 for year one, then $99 at renewal
Price in year 1$99
Price at renewal$99/yr
Three-year spend$297
Entry 3 is IL Registered Agent.org. $99 a year with a street address in the state on file.
Illinois Registered Agent.co lists exactly the same prices.
Price covers
An office address in the state
Served papers show up in your login
Holds up
$99 annually with no increase
Yearly price below the national option
Weak spots
No help outside the state
The Limited Liability Company Annual Report is left out
Three years of state charges means one filing, two reports and any minimum tax. We list open-ended costs such as publication but keep them out of the total.
Notes on the ranking
The 37% measure tracked three-year cost separated the top two.
Three years with Illinois Registered Agent.co come to $297, while Mainstay Filing runs $150 higher over the same stretch.
Illinois registered agent requirements, as written by the state (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. Section on point: 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.
Quoted: ilga.gov (pulled October 2026, noted here)
State fees and nothing else
If you qualify, you can list yourself and pay no agent fee, and state charges do not change. The services above charge $99 to $149 a year for a Illinois address and someone to take legal papers.
Frequently asked
How much does an Illinois registered agent cost per year?
Yearly prices run $99 to $149 here.
What do three years of agent service cost?
Three years of service run $297 to $447.
Is a registered agent required for an Illinois LLC?
Yes, it does. Every LLC must name a registered agent with an in-state street address.
Can the owner serve as the registered agent?
You can, provided you meet both the address and eligibility rules.
What does the state charge the LLC each year?
Each year the state charges $75 for the Limited Liability Company Annual Report, due before the first day of the entity's anniversary month.
In what year does one service become pricier than another?
Not in the next ten years. The running totals keep their order.
Which registered agent is the best value in Illinois?
Illinois Registered Agent.co wins on tracked three-year cost, followed by Mainstay Filing and IL Registered Agent.org.