How to Start an LLC in Illinois
Learn how to start an LLC in Illinois step by step. File your Articles of Organization with the Illinois Secretary of State for a $150 state fee. Bizee handles the paperwork for $0 + state fee.
Bizee Editorial Staff
Editorial Team
Illinois LLC at a glance
Filing fee: $150 (domestic LLC Articles of Organization)
Processing time: [PROCESSING_TIME]
State agency: Illinois Secretary of State
Annual report due: Before the first day of the LLC's anniversary month each year
State tax rate: Illinois does not impose a separate LLC-level income tax; members pay Illinois personal income tax at a flat 4.95% rate on their share of LLC income
How to start an LLC in Illinois
Forming an LLC in Illinois means filing Articles of Organization with the Illinois Secretary of State and paying a $150 state filing fee. You'll also need a registered agent with an Illinois address, a business name that includes "LLC" or "L.L.C.", and an Employer Identification Number (EIN) from the IRS before you open a business bank account or hire employees.
Why form an LLC in Illinois
An LLC gives Illinois business owners personal liability protection without the complexity of a corporation. If the business is sued or can't pay its debts, your personal finances stay separate — your personal assets aren't on the hook for what the business owes.
Illinois also offers real incentives for businesses that create jobs and invest in the state. The Economic Development for a Growing Economy (EDGE) Tax Credit Program provides annual tax credits to qualifying businesses that support capital investment and job creation. The state also offers grants and loans to help businesses buy equipment, machinery, and land when the investment benefits the local community.
For most entrepreneurs, an LLC hits the right balance — liability protection, pass-through taxation, and far less administrative overhead than a corporation.
How to start an LLC in Illinois
Illinois requires 6 steps to form an LLC. The process is straightforward, but a few details — like the name rules and registered agent requirement — catch people off guard if they haven't done it before.
Registered agent requirements in Illinois
Illinois requires every LLC to maintain a registered agent with a physical street address in the state — a P.O. box doesn't qualify. The registered agent must be available during normal business hours to accept service of process and official state correspondence.
You can name yourself, a trusted person, or a registered agent service. Using a service keeps your home address off public filings and makes sure you never miss a legal notice — even if you're traveling or move to a new address.
Operating agreement
An operating agreement is the internal document that governs how your LLC runs. It covers ownership percentages, voting rights, how profits and losses are divided, and what happens if a member wants to leave or the business needs to be dissolved.
Illinois doesn't require you to file it with the state, but you should keep a signed copy with your business records. For multi-member LLCs especially, a clear operating agreement prevents disputes before they start.
Employer Identification Number (EIN)
An EIN identifies your business to the IRS the way a Social Security number identifies an individual. Even if your LLC has no employees, you'll need an EIN to open a business bank account and to keep your personal Social Security number off business documents.
Apply directly at irs.gov/ein at no cost. The online application takes about 10 minutes and issues your EIN immediately upon completion.
Ongoing compliance for Illinois LLCs
After your LLC is formed, Illinois requires you to file an annual report with the Secretary of State each year. The report is due before the first day of your LLC's anniversary month. Missing the deadline can put your LLC out of good standing with the state.
Illinois LLCs are also subject to the state's flat 4.95% personal income tax rate on each member's share of LLC income. A tax professional can help you figure out what quarterly estimated payments, if any, you need to make.
Annual report: due before the first day of your LLC's anniversary month each year
Registered agent: must maintain a current registered agent with an Illinois address at all times
Business licenses: check with your city and county for any local business license requirements
State taxes: members report LLC income on their Illinois personal income tax returns
FAQ
The state filing fee for Illinois Articles of Organization is $150 for a domestic LLC. That's the required cost you pay directly to the Illinois Secretary of State. If you use a formation service, any service fee is separate from the state fee. Annual reports also carry a fee each year to keep your LLC in good standing.
File Articles of Organization with the Illinois Secretary of State online or by mail and pay the $150 state filing fee. Before you file, choose a business name that includes "LLC" or "L.L.C." and is distinguishable from existing registered names, and appoint a registered agent with an Illinois street address. Once approved, get an EIN from the IRS and open a business bank account.
Yes. You can file your own Articles of Organization directly with the Illinois Secretary of State without hiring an attorney or using a formation service. The state accepts online and mail filings. That said, many business owners use a formation platform to handle the paperwork and make sure nothing gets missed — especially the registered agent requirement, which is easy to overlook.
Yes. Illinois has no revenue requirement to form or maintain an LLC. You can form an LLC before your business earns a dollar — many entrepreneurs do exactly that to protect their personal assets from day one. You'll still need to file annual reports and meet ongoing compliance requirements regardless of whether the business is generating income.
The Articles of Organization is the formation document you file with the Illinois Secretary of State to officially create your LLC. It includes your LLC name, your registered agent's name and Illinois address, and your management structure. Once the state approves and returns the filed document, your LLC legally exists. You can file online or by mail through the Illinois Secretary of State's website.
An Employer Identification Number (EIN) is a federal tax ID issued by the IRS to identify your business. Most Illinois LLCs need one — you'll need an EIN to open a business bank account, hire employees, and file certain federal tax forms. You can apply for an EIN for free at irs.gov/ein. The online application issues your EIN immediately.
It depends on how you file. Online filings through the Illinois Secretary of State are generally processed faster than mail filings. Processing times can vary based on the state's current workload. Check the Illinois Secretary of State's website for current processing estimates, or ask your formation service about expedited options if timing matters for your business.
