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What a registered agent costs by state / Illinois

3 Best Registered Agents in Illinois (2026): What You Pay

Your best-value options among Illinois registered agents for 2026 are Mainstay Filing ($149/yr), Illinois Registered Agent.co ($99/yr) and IL Registered Agent.org ($99/yr), ranked from first to third. You can expect to pay $99 to $149 in the first year and $297 to $447 by year three.
Written by the Price Your LLC editorial team

↓ Ranked for you by: We rank on five things: your spend (38%), your workload (31%) and three smaller ones

Your Illinois budget

Do you need a registered agent? Yes ilga.gov (we looked on October 2026, so you can too)
What year one costs you $99 to $149 Cost of one agent year
Three-year range $297 to $447 First year and both renewals
Limited Liability Company Annual Report $75 a year ilsos.gov (we looked on October 2026, so you can too)
When one overtakes another Does not happen Order never flips

Illinois ranking

Options sit in value order, with prices taken from company pages. State fees are the same whoever serves as agent.

1
Best value for you

1. Mainstay Filing: best for LLCs in more than one state

You pay $149 in year one, then $149 a year
You pay in year 1 $149
You pay at renewal $149/yr
You pay over 3 years $447

In Illinois, Mainstay Filing is where your money goes furthest, since the price stays $149 a year wherever your company registers next.

Three years cost you $150 more than Illinois Registered Agent.co, but the extra work it covers counts for more in the ranking.

Your price covers

  • An office address inside the state
  • Up to three government mailings a year, scanned for you free
  • Covers LLCs, corporations, LPs, LLPs and nonprofits

What you get

  • $149 every year
  • Valid in every state

What to watch

  • Costs you $50 extra annually
  • Does not file the yearly report
2
Illinois focus

2. Illinois Registered Agent.co: best for the smallest yearly bill

You pay $99 in year one, then $99 a year
You pay in year 1 $99
You pay at renewal $99/yr
You pay over 3 years $297

Option 2 is Illinois Registered Agent.co. $99 a year and $99 at renewal, meant for an LLC that stays in one state.

Your price covers

  • A local registered office
  • Scans of papers served on the LLC

What you get

  • $99 a year, no change at renewal
  • Costs you less than Mainstay Filing each year

What to watch

  • Another state means another agent
  • Does not cover the Limited Liability Company Annual Report
3
Illinois focus

3. IL Registered Agent.org: best for a nearby alternative

You pay $99 in year one, then $99 a year
You pay in year 1 $99
You pay at renewal $99/yr
You pay over 3 years $297

Option 3 is IL Registered Agent.org. $99 a year and $99 at renewal, meant for an LLC that stays in one state.

You would pay the same at Illinois Registered Agent.co.

Your price covers

  • A local registered office
  • Scans of papers served on the LLC

What you get

  • Costs you less than Mainstay Filing each year
  • $99 a year, no change at renewal

What to watch

  • Another state means another agent
  • Does not cover the Limited Liability Company Annual Report

What each service adds up to

Pick Service You pay in year 1 You pay by year 2 You pay by year 3 You pay by year 5
1 Mainstay Filing $149 $298 $447 $745 Price out Mainstay Filing Partner link. We may earn money if you buy.
2 Illinois Registered Agent.co $99 $198 $297 $495 Price out Illinois Registered Agent.co Partner link. We may earn money if you buy.
3 IL Registered Agent.org $99 $198 $297 $495 Price out IL Registered Agent.org Partner link. We may earn money if you buy.

Looked at November 13, 2026. Every column adds another renewal. Ranked by running total, the order is steady for ten years.

Cost calculator

Tell us how many years you plan to keep the LLC and each service's running total updates.

Your spend for 3 years: Mainstay Filing $447, Illinois Registered Agent.co $297, IL Registered Agent.org $297. Lowest of the totals: Illinois Registered Agent.co.

The government side of your Illinois budget

What you pay for Amount Source
LLC formation filing $150 ilsos.gov (we looked on October 2026, so you can too)
Limited Liability Company Annual Report $75 every year ilsos.gov (we looked on October 2026, so you can too)
Cost of missing the deadline $100 ilsos.gov (we looked on October 2026, so you can too)
Three-year state total $300 Added up from the lines above

Your three-year bill from the state is made of the filing fee, the reports due in years two and three, and a yearly minimum tax in states that levy one. Anything the state does not put a fixed price on, a newspaper notice for example, is described but never added.

Why this order for Illinois

Mainstay Filing wins upkeep the price covers, worth 31%, with Illinois Registered Agent.co close behind.

Coverage put it ahead of Illinois Registered Agent.co.

What Illinois requires of your registered agent (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.

The state's wording: ilga.gov (we looked on October 2026, so you can too)

Filing it yourself

Without a service, your agent cost is zero provided you qualify, and state charges do not change. Services run $99 to $149 a year.

About these prices

How much will an Illinois registered agent cost me per year?

These agents charge $99 to $149 per year.

What do three years of agent service cost?

$297 to $447 across the services, not counting state fees.

Do I have to have a registered agent for an Illinois LLC?

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

Can I be my own registered agent?

Yes, if you meet the eligibility and address rules above.

What will the state charge my LLC each year?

You pay $75 each year for the Limited Liability Company Annual Report; the state sets the deadline at before the first day of the entity's anniversary month.

When does one service end up costing more than another?

There is no crossing within ten years, so no service overtakes another.

Which registered agent is the best value for me in Illinois?

Start with Mainstay Filing, then Illinois Registered Agent.co, then IL Registered Agent.org.

Related pages

What a registered agent costs by state for all 50 states Best registered agents for anyone How we rank your options

Where we looked

  1. Our source for Illinois Secretary of State, Department is ilsos.gov, from August 2026.
  2. Our source for Illinois Secretary of State, Department is ilsos.gov, from August 2026.
  3. Our source for 805 ILCS 180/5-5 is ilga.gov, from August 2026.
  4. Our source for Illinois formation fee: Filing fee is ilga.gov, from October 2026.
  5. Our source for Illinois formation fee: Filing fee is ilsos.gov, from October 2026.
  6. Our source for Illinois registered agent statute is ilga.gov, from October 2026.
  7. Mainstay Filing Illinois service page, as we saw it on November 13, 2026
  8. Illinois Registered Agent.co pricing page, as we saw it on November 13, 2026
  9. IL Registered Agent.org pricing page, as we saw it on November 13, 2026