How to Start an LLC in Illinois
Forming an LLC in Illinois only takes a few steps. You’ll need to file Articles of Organization, including paying a $150 filing fee, with the Illinois Department of Business Services, Limited Liability Division. On top of filing your formation documents, you’ll need to pick a name, consider trademarking your business assets, and more. Everything you need to know about starting an LLC in Illinois is here in this easy-to-read guide.

1. Name Your Illinois LLC
You can’t start an LLC without a name. So the first step in getting your Illinois business off the ground is choosing a name to represent your company.
Naming requirements for LLCs in Illinois
When choosing a name for your LLC in Illinois, you’ll need to follow the guidelines in §805 ILCS 180/1-10:
- Include the words limited liability company or an abbreviation, such as LLC.
- Not include words or abbreviations that are reserved for other entity types, such as corporation, limited partnership, or Inc.
- Not include the words trust, trustee, or fiduciary, unless the business is an authorized corporate fiduciary.
Your business name also needs to be different from any other active business name in Illinois. You can do a quick search to see if your proposed business name is available by using the Illinois Business Entity Search.
Illinois allows you to reserve a business name for up to 90 days. To reserve your business name, you’ll need to submit an Application for Reservation of Name to the Illinois Department of Business Services and pay a $25 filing fee. Need to renew that reserved name? You can do so by filing the same form and paying the fee again.
Your LLC’s official name is the one written on your Articles of Organization. Any other name your LLC does business under is an assumed business name (sometimes called a fictitious business name or DBA). Assumed business names need to be registered with the Illinois Secretary of State’s office.
Considering using an assumed business name? Learn How to Get an Illinois DBA.
While all registered business names in Illinois must be distinct, that doesn’t mean that your LLC name is protected from general use. For example, sole proprietors who don’t file formation documents with the state can use your business name as a DBA. To have a stronger legal claim to your name, you can trademark your LLC name for $10 by filing the State of Illinois Trademark or Service Mark Application. You can also go a step further and trademark your business name nationwide with a federal trademark.

2. Register Your Illinois LLC's Domain Name
After choosing your LLC’s name, a good next step is locking down a domain name for your business website. Your domain name (URL) is the web address to your site.
A professional domain name should be easy to remember—and ideally, match or complement your business name. When you register your domain name early, you’re more likely to get a name that meets those standards.
You’ll need to claim a business domain name through a registrar. When you hire Northwest to form your LLC, domain registry is one of many in-house services we provide, so you also get a domain name free for a year, plus your own customizable business website secured with SSL protection, and up to ten email business addresses connected to that domain.

3. Appoint a Registered Agent for Your LLC in Illinois
A registered agent is a person or business who accepts legal mail (called service of process) on behalf of your business. All LLCs in Illinois are required to have a designated registered agent based in the state. You’ll have to include your registered agent’s name and address on your Articles of Organization.
Your Illinois registered agent is required to:
- Have an Illinois physical address (not a P.O. Box).
- Hold regular business hours.
- Accept legal mail on your business’s behalf and deliver it to you promptly.
For more details, rules for registered agents in Illinois are outlined in §805 ILCS 180/1-35.
Using a registered agent service in Illinois
You can, of course, serve as your own LLC’s registered agent in Illinois. In fact, any organizer, manager, member, or employee of your company can be its registered agent. But here are some things to keep in mind:
- Privacy. Your registered agent’s address will be listed on the public record and easy for anyone to access online.
- Availability. Service of process mailings are no joke. They require proper handling by someone available during regular business hours to accept and notify you of important documents.
- Appearance. It’s never fun being served a lawsuit. It’s even worse (and more damaging to your business reputation) to be served in front of customers and business associates.
When you hire a service like Northwest Registered Agent to handle service of process mailings, you’ll be notified quickly and discreetly when we receive time-sensitive documents for your LLC.

4. File Illinois Articles of Organization
To officially form your LLC, you’ll need to submit two identical Illinois LLC Articles of Organization forms to the Illinois Secretary of State. Illinois allows you to file your Articles online through the Illinois Secretary of State website or by submitting paper form LLC-5.5 by mail or in person. You’ll need to pay a $150 filing fee. Standard processing time is around 10 business days. Once your Articles of Organization have been processed, your LLC is officially in business!
You’ll need this information to file your Articles:
Your LLC’s name should include the words or abbreviations Limited Liability Company, L.L.C., or LLC.
The principal place of business for your LLC is not required to be an Illinois address.
You can leave the effective filing date blank to file on the day your paperwork is received, or select a date up to 60 days after your LLC registration is received.
You’ll need to supply the name of your Illinois registered agent, plus the address where they’ll receive legal mail on your behalf.
You can list a specific objective, or that the LLC is filed under any lawful purpose under Illinois law.
You can choose a termination date for you LLC, or choose for it to exist in perpetuity.
You may include additional provisions in your Articles of Organization, such as the LLC’s internal policies.
List the names of all managers (or members with the power of managers), as well as business addresses where they can be contacted.
Include signatures from any LLC organizers who filed to create the company.
Note: All information on this form will go on the public record.
You can submit your Articles of Organization online, by mail, or in person.
By mail or in person:
Department of Business Services
Limited Liability Division
501 S. Second St., Rm. 351
Springfield, IL 62756
Online:
All LLCs formed in Illinois are by default member-managed, unless otherwise outlined in your LLC’s operating agreement. A member-managed LLC is an LLC where all members take part in overseeing business operations. A manger-managed LLC is one where the members of the LLC hire managers for the specific purpose of running the business.
Unsure which structure is best for your LLC in Illinois? Check out our LLC Member Vs Manager page.
Illinois is one of over a dozen states that allow business owners to form entities called Series LLCs. A Series LLC allows you to create an LLC that houses other LLCs within it. The businesses within the main LLC have individual liability protection, business purposes, and assets, making them their own entities.
Series LLCs allow business owners to protect all their separate businesses while grouping them together. These business structures are popular for property rental companies. You can form a Series LLC in Illinois by submitting your Articles of Organization and paying a $400 filing fee.
The Illinois Secretary of State’s Business Services Division takes about 10 business days to process LLC Articles of Organization. It takes the same amount of time whether the filing is received through mail, online, or in-person. You can get your Articles of Organization in 24 hours by paying an extra $250 for expedited processing.
Start Your LLC in Illinois Today!
You've Started an LLC in Illinois, What's Next?

5. Write an Illinois LLC Operating Agreement
Now that your LLC has been formed, it should have an operating agreement. Per §805 ILCS 180/1-30, an LLC is not required to write an Illinois operating agreement, but you should still have one for your LLC. If you don’t have an operating agreement, your business will be governed by Illinois’s default LLC statutes. Your operating agreement should plan for every major situation that your LLC is likely to deal with.
Here are some common topics operating agreements cover:
- initial investments
- profits, losses, and distributions
- voting rights, decision-making powers, and management
- transfer of membership interest
- dissolution
You’re free to include almost any rule in your operating agreement as long as it doesn’t contradict the Articles of Organization or Illinois law. Operating agreements are internal documents, so you don’t need to file yours with the Secretary of State.

6. Get Your Illinois LLC's EIN
Your Illinois LLC will likely need an EIN (Employer Identification Number) to do business as well. An EIN is the number the IRS uses to identify your business on tax forms. It works more or less like a social security number, but specifically for your business.
The IRS lets you apply for an EIN for free online and by mail. Or you can skip the paperwork and hire Northwest to file for you.
Learn How to get an EIN for your LLC.

7. Get an Illinois LLC Bank Account
To continue operating your business, you need to maintain compliance by keeping up with permits, licenses, and more. Here’s what you’ll need to do.
Opening a bank account for your LLC
The next step is to open a business bank account. This is essential for LLCs because your limited liability depends on keeping business and personal finances separate.
When you open an account at a bank for your Illinois LLC, be sure to bring the following things:
- Illinois LLC Articles of Organization (a copy is fine)
- the LLC’s operating agreement
- the LLC’s EIN
- an LLC Resolution to Open a Bank Account (if your LLC has more than one member)
Use our free LLC Resolution to Open a Bank Account.

8. Licenses, Taxes and Reports for LLCs in Illinois
File a Beneficial Ownership Report
Most LLCs, including LLCs in Illinois, are asked to file a Beneficial Ownership Information (BOI) Report with the Financial Crimes Enforcement Network (FinCEN). The deadline for filing your BOI Report depends on when your business was formed.
The BOI Report requirement is currently under review by both FinCEN and Congress, but the deadline for new businesses is 30 days from their formation. We’ll keep our pages up to date as court rulings play out, so you’re not left out of the loop about the status of this important business filing.
Illinois Licenses and Permits
In Illinois, all businesses need to get a Certificate of Registration or License, which acts as a tax permit, allowing the business to collect sales tax. To get your Illinois tax permit, you’ll need to file form Reg-1 with the Central Registration Division Illinois Department of Revenue, which can be done online through the MyTaxIllinois web portal or by mail. There is no filing fee. You may also need to get a professional license, zoning permit or other types of state or local permits based on your industry and location.
Illinois Annual Reports
Your Illinois Annual Report is due before the first day of your business’s anniversary month. So if your LLC was formed on April 7th, your annual report is due by March 31st the following year. The fee to file the report is $75. If your report is more than 60 days late, you will have to pay a $100 late fee.
Illinois tax requirements
On top of getting a Certificate of Registration or License to collect the 6.25% Illinois sales tax, your LLC will also need to pay the individual income tax rate of 4.95%. Because all LLCs are taxed as pass-through entities, the business’s profits and losses pass through to the members for them to pay on their own tax returns. You should also check if your municipality has a local sales tax rate. Finally, LLCs with employees will also need to pay workers’ compensation and unemployment insurance taxes.
Check out our Illinois LLC Taxes guide to learn more.
*This is informational commentary, not advice. This information is intended strictly for informational purposes and does not constitute legal advice or a substitute for legal counsel. This information is not intended to create, nor does your receipt, viewing, or use of it constitute, an attorney-client relationship. More information is available in our Terms of Service.
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