Illinois Registered Agents (2026): Official Rules, State Fees and the 3 Best Agents
Illinois in 2026, registered agent service: we rank Illinois Registered Agent.co ($99 a year), Mainstay Filing ($149 a year) and IL Registered Agent.org ($99 a year) in that order. Each Illinois LLC keeps a registered agent on record. The state's recurring charges come to $75 a year, ranking 34th of 50.
Entry by the Statewise Business almanac desk ·
Illinois fee schedule
34thof 50, yearly state fees
150
Position 1 is the least expensive state; equal totals share a place. All fifty rows
Prices on file from November 12, 2026. Naming a different agent leaves the state fees alone.
Agent and state fees, by year
Each agent's price is paired with the repeating state fees (the Limited Liability Company Annual Report from year two); formation fees are left out of the total.
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.
Who qualifies as agent: An Illinois resident, or a business authorized to do business in Illinois. The LLC cannot act as its own agent. This rests on 805 ILCS 180/1-35.
What Illinois bills every year
The Limited Liability Company Annual Report arrives every year at $75 (due before the first day of the entity's anniversary month). The late fee is $100. The state's reminders go to your registered agent.
What settled the order
Illinois Registered Agent.co won on added cost over three years, which is worth 32%; Mainstay Filing came next.
Illinois Registered Agent.co comes to $297 over three years, which is $150 under Mainstay Filing.
Illinois FAQ
Is a registered agent compulsory in Illinois?
It is. Every LLC must name a registered agent with an in-state street address.
Who is allowed to act as the registered agent in Illinois?
An Illinois resident, or a business authorized to do business in Illinois. The LLC cannot act as its own agent.
What does a Illinois registered agent charge each year?
Our picks cost $99 to $149 per year.
What does the state charge an LLC every year?
$75 a year on the almanac's yearly measure, which is the Limited Liability Company Annual Report ($75 every year).
Which registered agents does this entry list?
Illinois Registered Agent.co ($99 a year), Mainstay Filing ($149 a year) and IL Registered Agent.org ($99 a year), by almanac rank, first entry first.
Which registered agent should I choose?
Illinois Registered Agent.co leads, then Mainstay Filing and IL Registered Agent.org. The lead comes down to added cost over three years.