Benefits of Starting an LLC in Illinois
Illinois offers several advantages for LLC owners, from flexible structuring options to straightforward formation requirements. Here is what makes the Prairie State a solid choice for your business.
Series LLC Option
Illinois is one of the few states that allows series LLCs, letting you create separate “series” within a single LLC, each with its own assets, members, and liability protection.
No Franchise Tax
Illinois does not impose a franchise tax on LLCs, which means you avoid the recurring privilege taxes that eat into profits in states like California or Texas.
No Publication Requirement
Unlike neighboring states such as New York, Illinois does not require you to publish a notice of LLC formation in any newspaper, saving you hundreds of dollars.
Single-Member Friendly
Illinois fully supports single-member LLCs, so solo entrepreneurs get the same liability protection and tax flexibility as multi-member companies.
Quick Facts About an Illinois LLC
1Name Your Illinois LLC
Your LLC name must be distinguishable from every other business entity on file with the Illinois Secretary of State. Before you settle on a name, run a search using the Illinois business entity search to check availability.
Illinois naming rules require your LLC name to include one of these designators:
- “Limited Liability Company”
- “LLC”
- “L.L.C.”
Your name cannot include words that imply the business is a corporation (such as “Inc.” or “Corp.”) or words that suggest a government affiliation. Certain restricted words like “Bank,” “Insurance,” or “University” may require additional licensing or written approval.
If you have found a name but are not ready to file your articles of organization yet, you can reserve it for 90 days by filing a name reservation application with the Illinois Secretary of State for $25.
2Choose a Registered Agent in Illinois
Every Illinois LLC must designate a registered agent. This is the person or company authorized to receive legal documents, service of process, and official state correspondence on behalf of your LLC.
Your registered agent must meet these requirements:
- Be an individual resident of Illinois or a business entity authorized to do business in the state
- Have a physical street address in Illinois (P.O. Boxes are not acceptable)
- Be available at that address during normal business hours
You have three main options:
- Be your own registered agent. This is free, but your name and address become part of the public record, and you must be available at that address during business hours every weekday.
- Appoint a friend, family member, or business associate. They must meet the same residency and availability requirements.
- Hire a professional registered agent service. This is the most popular option because it keeps your personal address off public filings, ensures you never miss a legal notice, and frees you from being tied to one location. Most services cost $50 to $300 per year. You can compare Illinois registered agent services to find the right fit.
Yes. Illinois law requires every LLC to maintain a registered agent with a physical street address in the state. You cannot form or maintain an LLC without one. If your agent resigns or becomes unavailable, you must appoint a replacement promptly or risk losing your good standing.
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Northwest Registered Agent
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3File Your Illinois Articles of Organization
The articles of organization (Form LLC-5.5) is the document that officially creates your LLC with the state. You file it with the Illinois Secretary of State, and you can do so online or by mail.
The form requires the following information:
- LLC name
- Registered agent name and street address
- Principal office address
- Purpose of the LLC (a general statement is fine, such as “to engage in any lawful business”)
- Effective date (you can set a future date if needed)
- Name and address of the LLC organizer
- Management structure (member-managed or manager-managed)
| Filing Method | Fee | Processing |
|---|---|---|
| Online | $150 | 5-10 business days |
| $150 | 3-4 weeks | |
| Expedited (online or mail) | $250 total | 24 hours |
To file online, use the Secretary of State’s LLC filing portal. For mail filing, download Form LLC-5.5 and send it with a check or money order to the address below.
Mail Filing Address
Secretary of State
Department of Business Services
Limited Liability Division
501 S. Second St., Rm. 351
Springfield, IL 62756
If you would rather have a professional handle the filing for you, compare Illinois LLC formation services to see your options.
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ZenBusiness
ZenBusiness prepares and files your Illinois articles of organization, handles compliance reminders, and gets you up and running without the paperwork.
Their free starter plan covers formation filing and a year of registered agent service, making it the most affordable hands-off option.
4Get an EIN for Your Illinois LLC
An Employer Identification Number (EIN) is a federal tax ID for your business. You need one to open a business bank account, hire employees, and file federal taxes. Apply for free directly through the IRS website. The online application takes about five minutes, and you receive your EIN immediately upon completion.
5Create an Operating Agreement for Your Illinois LLC
Illinois does not legally require an operating agreement, but you should create one regardless. This internal document defines how your LLC is owned, managed, and operated. Without one, Illinois default LLC rules govern your business, and those defaults may not align with what you and your co-members actually agreed to.
Your operating agreement should cover:
- Ownership percentages and capital contributions
- Profit and loss distribution
- Member voting rights and decision-making procedures
- Management structure (member-managed vs. manager-managed)
- Rules for adding or removing members
- Procedures for dissolution
Even single-member LLCs benefit from an operating agreement. It reinforces the legal separation between you and your business, which is critical if your liability protection is ever challenged in court.
It is not required by state law, but it is strongly recommended. Banks may ask to see one when you open a business account, and it is your primary defense for proving your LLC is a legitimate, separately managed entity. If you have multiple members, operating without one is a recipe for disputes.
6Open a Business Bank Account
Once you have your articles of organization and EIN, open a dedicated business bank account. Never mix personal and business funds. Commingling finances is one of the fastest ways to lose your LLC’s liability protection through what courts call “piercing the corporate veil.”
Bring these items to the bank:
- Filed articles of organization (or certificate of organization from the state)
- EIN confirmation letter from the IRS
- Operating agreement
- Government-issued photo ID
How Much Does an Illinois LLC Cost
Here is a full breakdown of every fee you may encounter when forming and maintaining an Illinois LLC.
| Item | Cost | Frequency | Notes |
|---|---|---|---|
| Articles of Organization (online) | $150 | One-time | Filed with the Secretary of State |
| Articles of Organization (mail) | $150 | One-time | Same fee, slower processing |
| Expedited Processing | $250 total | One-time | 24-hour turnaround |
| Name Reservation | $25 | One-time | Holds name for 90 days |
| Registered Agent Service | $50 – $300 | Annual | Free if you serve as your own |
| EIN | $0 | One-time | Free from the IRS |
| Operating Agreement | $0 – $200 | One-time | Free with templates, more with an attorney |
| Annual Report | $75 | Annual | Due before the first day of your anniversary month |
| Certificate of Good Standing | $25 | As needed | Often required by banks or for foreign registration |
Articles of Organization (online)
$150 · One-timeFiled with the Secretary of State
Articles of Organization (mail)
$150 · One-timeSame fee, slower processing
Expedited Processing
$250 total · One-time24-hour turnaround
Name Reservation
$25 · One-timeHolds name for 90 days
Registered Agent Service
$50 – $300 · AnnualFree if you serve as your own
EIN
$0 · One-timeFree from the IRS
Operating Agreement
$0 – $200 · One-timeFree with templates, more with an attorney
Annual Report
$75 · AnnualDue before the first day of your anniversary month
Certificate of Good Standing
$25 · As neededOften required by banks or for foreign registration
How Does Illinois Compare
Illinois Filing Fee
$150
National Average
$127
Illinois sits slightly above the national average at $150, but the absence of a franchise tax and no publication requirement help offset that upfront cost over time.
Illinois LLC Taxes
State Income Tax
Illinois imposes a flat income tax. LLCs themselves do not pay the state income tax directly in most cases. Instead, profits pass through to the members, who report them on their personal Illinois income tax returns. This is consistent with the federal pass-through treatment.
By default, a single-member LLC is treated as a disregarded entity (taxed like a sole proprietorship), and a multi-member LLC is taxed as a partnership. You can elect to be taxed as an S-corp or C-corp by filing the appropriate forms with the IRS if a different classification benefits your situation.
Franchise Tax
Illinois does not impose a franchise tax on LLCs. This is a meaningful advantage compared to states like California, which charges an $800 annual franchise tax regardless of revenue.
Sales Tax
If your LLC sells taxable goods or certain services, you must collect and remit Illinois sales tax. The state rate is 6.25%, but local municipalities add their own taxes on top of that, so the combined rate you actually collect will vary by location. Register with the Illinois Department of Revenue to get your sales tax ID before you begin selling.
Self-Employment Tax
LLC members who actively participate in the business are subject to federal self-employment tax (15.3%) on their share of profits. If self-employment taxes become significant, an S-corp election can allow you to pay yourself a reasonable salary and take remaining profits as distributions, which are not subject to self-employment tax.
By default, an Illinois LLC is a pass-through entity. Single-member LLCs are taxed as sole proprietorships and multi-member LLCs are taxed as partnerships. Profits flow through to the members’ personal tax returns, where they are subject to Illinois state income tax and federal income tax. There is no separate franchise tax for LLCs in Illinois.
After Forming Your Illinois LLC
Annual Report
Every Illinois LLC must file an Annual Report with the Secretary of State. The fee is $75, and the report is due before the first day of the anniversary month of your LLC’s formation. For example, if you formed your LLC on March 15, your annual report is due before March 1 each year.
You can file your annual report online through the Secretary of State’s website. The report updates your LLC’s basic information, including your registered agent, principal address, and member or manager names.
BOI Report
As of March 2025, FinCEN revised its Beneficial Ownership Information (BOI) reporting rule so that it only applies to companies formed outside the United States. Domestic LLCs, including those formed in Illinois, are exempt from BOI reporting.
Business Licenses and Permits
Illinois does not require a general state business license. However, depending on your industry and location, you may need industry-specific state licenses, county permits, or city business licenses. Check with your local municipality and any relevant state regulatory boards to confirm what applies to your business.
Yes. Every Illinois LLC must file an Annual Report and pay the $75 fee each year. The deadline is before the first day of the month in which your LLC was originally formed. Failure to file can result in a $100 penalty and eventually administrative dissolution.
Dissolving an Illinois LLC
If you decide to close your LLC, you must formally dissolve it with the Illinois Secretary of State. Filing articles of dissolution costs just $5, making Illinois one of the cheapest states for winding down an LLC.
Before filing for dissolution, take care of these steps:
- Pay any outstanding taxes and fees
- File all past-due annual reports
- Settle debts and distribute remaining assets to members
- Cancel any state or local licenses and permits
- Close your business bank account after all transactions are settled
If your LLC was administratively dissolved for failure to file annual reports, you can apply for reinstatement. The reinstatement fee is $200 plus all delinquent annual report fees and penalties. The longer you wait, the more expensive it gets.
An Illinois LLC does not have an expiration date. It exists indefinitely as long as you file your annual reports and stay in compliance. However, if you fail to file annual reports for 180 days past the deadline, the state can administratively dissolve your LLC. You can reinstate it by paying $200 plus all delinquent fees.
Frequently Asked Questions
The minimum cost to form an Illinois LLC is $150 for the articles of organization filing fee. If you want expedited 24-hour processing, add $100 for a total of $250. Ongoing costs include a $75 annual report fee each year. Optional expenses like a registered agent service ($50 to $300 per year) and a name reservation ($25) add to the total depending on your needs.
Online filings are typically processed in 5 to 10 business days. Mail filings take approximately 3 to 4 weeks. If you need your LLC approved quickly, expedited processing is available for an additional $100, which reduces the turnaround to 24 hours.
Yes. Illinois fully allows single-member LLCs. You get the same liability protection and tax flexibility as a multi-member LLC. The formation process is identical. You just list yourself as the sole member and organizer on the articles of organization.
Illinois is a strong choice if you operate your business there. The filing fee of $150 is slightly above the national average, but the state offers no franchise tax, no publication requirement, series LLC availability, and a straightforward annual compliance process. For most business owners, forming your LLC in your home state is the most practical and cost-effective option.
