Business License in Illinois: Requirements & Fees (2026)
Illinois has no general statewide business license. Most businesses instead register with the Illinois Department of Revenue for a Certificate of Registration (the state sales tax permit), which is free, using Form REG-1 on MyTax Illinois. Depending on your profession and city, you may also need an IDFPR professional license and a local license.
Quick Answer
- General state license?
- No - Illinois issues no single statewide business license
- State tax registration
- Certificate of Registration (sales tax permit) - free, Form REG-1
- Agency
- Illinois Department of Revenue (IDOR), via MyTax Illinois
- Professional licenses
- Illinois Department of Financial and Professional Regulation (IDFPR)
- Local licenses
- Often required by city/county (e.g., Chicago)
- Federal EIN
- Free from the IRS; needed to register and hire
Does Illinois Require a General Business License?
No. Unlike a handful of states, Illinois does not issue a single, all-purpose statewide business license that every company must hold. There is no "Illinois business license" you renew each year. Instead, your obligations are a combination of (1) state tax registration with the Illinois Department of Revenue, (2) any professional or occupational license your work requires, and (3) any local license imposed by your city or county.
This layered system means "do I need a business license in Illinois?" almost always resolves to "which specific registrations apply to my activity and location?" The most common and universal one for sellers is the state tax registration described below. If you are also setting up the entity itself, start with how to form an LLC in Illinois and the national business license overview.
State Tax Registration: The Certificate of Registration (Form REG-1)
The registration most Illinois businesses need is the Certificate of Registration, the state's sales tax permit - also called a seller's permit or "Illinois Business Authorization." Any business that sells taxable goods or provides taxable services in Illinois must register with the Illinois Department of Revenue (IDOR) before making sales. You register using Form REG-1, most easily through the MyTax Illinois online portal.
The registration itself is free. IDOR reports that online applications are typically processed in about one to two business days, while a paper application can take four to six weeks. Registration also sets up your account for related taxes, such as the Retailers' Occupation Tax and Use Tax, and, if you have employees, Illinois withholding tax. Once registered, you receive an account ID and file returns on the schedule IDOR assigns.
It helps to understand the terminology, because Illinois uses several names for the same thing. What other states call a "sales tax permit" or "seller's permit," Illinois calls a Certificate of Registration, and the online system may refer to your overall registration as an "Illinois Business Authorization." The underlying legal authority is the Retailers' Occupation Tax Act (35 ILCS 120), which imposes the tax measured by retail sales and requires sellers to be registered. Do not confuse the free Certificate of Registration with a paid municipal business license - they come from different governments and serve different purposes. You collect and remit sales tax under the state registration; the local license is permission to operate in a given city.
Who Must Register With the Department of Revenue
You generally must register with IDOR if you do any of the following in Illinois:
- Sell or lease tangible personal property to end users (retail sales);
- Provide services that are taxable under Illinois law;
- Withhold Illinois income tax from employees' wages;
- Owe certain excise taxes (for example, on tobacco, liquor, or telecommunications); or
- Are a remote or out-of-state seller with enough Illinois sales to create a tax obligation.
Even service businesses that do not sell physical goods often register for withholding once they hire employees. Before you register, obtain your federal EIN from the IRS, because the REG-1 asks for it. If you are a sole proprietor without employees, you may not need an EIN - see whether you need an EIN.
Professional and Occupational Licenses (IDFPR)
Many occupations in Illinois require a state professional license issued by the Illinois Department of Financial and Professional Regulation (IDFPR). IDFPR licenses a long list of professions, including certified public accountants, cosmetologists and barbers, roofing and other contractors, real estate brokers, nurses and other health professionals, and many more. If your occupation is regulated, this license is separate from - and in addition to - your IDOR tax registration.
Whether you need an IDFPR license depends entirely on the profession, not on the business structure. An LLC, corporation, or sole proprietor doing the same regulated work faces the same licensing requirement. Fees and renewal cycles vary by profession, so confirm the requirement and cost for your specific license on IDFPR's site before you begin offering services.
Local City and County Business Licenses
Local governments, not the state, impose most true "business licenses" in Illinois. The clearest example is the City of Chicago, which requires a business license for most businesses operating within city limits and organizes licenses by activity. Other municipalities - from large suburbs to small towns - may require their own general business registration, a home occupation permit, signage permits, or health permits for food service.
Because there is no statewide standard, the only reliable way to know is to contact the clerk or finance department of the city (and county) where you will operate. Do this early: local licensing can involve zoning review and inspections that take time. If you use a DBA (assumed name), county-level assumed-name registration may also apply.
Industry-Specific State Licenses
Beyond IDFPR professions, certain industries answer to other Illinois agencies. Food and beverage businesses deal with the Illinois Department of Public Health and local health departments; liquor sellers need a license from the Illinois Liquor Control Commission (and often a local liquor license); trucking and transportation touch the Illinois Commerce Commission; and childcare, agriculture, and environmental activities each have their own regulators. These industry licenses are activity-specific and layer on top of your tax registration.
The practical takeaway is to map every regulated aspect of your business - what you sell, who you serve, and where - to the agency that governs it. Missing an industry license can halt operations even if your tax registration is perfect.
Registering Your LLC or Corporation First
Licensing sits on top of entity formation. If you plan to operate as an Illinois LLC or a corporation, form the entity with the Illinois Secretary of State first, then obtain your EIN, then register with IDOR and secure any professional and local licenses. Doing it in that order avoids having to re-register accounts in a different name. Ongoing, your entity also has an Illinois annual report to file with the Secretary of State - a compliance item separate from licensing.
Keep the three systems distinct in your compliance calendar, because they renew on different cycles and with different agencies. Entity compliance (the annual report) runs on your formation anniversary with the Secretary of State; tax registration runs on the filing frequency IDOR assigns for sales and withholding; and professional or local licenses renew on the schedule set by IDFPR or your municipality. Missing any one of them has different consequences - a lapsed annual report can lead to administrative dissolution of the entity, while an unpaid local license can bring city fines - so track them separately rather than assuming a single renewal covers everything.
Fees at a Glance (2026)
The state's core tax registration is free; costs arise mainly from professional and local licenses, which vary widely. Confirm current amounts with the relevant agency before you rely on any figure.
Budget realistically. Because the biggest licensing costs in Illinois are local and profession-specific, two businesses with identical revenue can face very different totals: a home-based online seller might pay nothing beyond the free state registration, while a restaurant in Chicago may stack a city business license, a food establishment license, a liquor license, and signage permits. Treat the free state tax registration as the floor, then add the professional and local licenses your specific activity and address require.
| Item | Agency | Fee (2026) |
|---|---|---|
| Certificate of Registration (sales tax permit, Form REG-1) | Dept. of Revenue | $0 (free) |
| Federal EIN | IRS | $0 (free) |
| Professional / occupational license | IDFPR | Varies by profession |
| City / county business license | Local government | Varies by locality |
| Industry license (liquor, food, etc.) | State / local regulator | Varies by industry |
Frequently Asked Questions
Does Illinois require a general business license?
No. There is no single statewide business license. Most businesses register with the Department of Revenue for tax purposes and obtain any professional and local licenses that apply.
What is the Illinois Certificate of Registration?
It is Illinois's sales tax permit (seller's permit / Illinois Business Authorization), obtained free from the Department of Revenue using Form REG-1 on MyTax Illinois.
How much does it cost to register with the Department of Revenue?
The Certificate of Registration is free. Some regulated products (liquor, tobacco) require extra licenses and bonds with their own fees, but basic REG-1 registration has no fee.
Do I need a license from IDFPR?
Only if your profession is regulated - for example, CPAs, cosmetologists, contractors, and real estate brokers. IDFPR licensing is separate from tax registration.
Does Chicago require its own business license?
Yes. Chicago requires a business license for most businesses in the city, separate from state registration. Many other Illinois municipalities do too.
Related
- Business license (national hub)
- How to form an LLC in Illinois
- Illinois annual report
- Illinois registered agent
- How much does an Illinois LLC cost?
- How to get an EIN
- What is a DBA?
- Business license in Pennsylvania (compare)
Sources
- Illinois Department of Revenue - Business Registration (who must register; Form REG-1; free).
- Illinois Department of Revenue - Pub-113, Registering Your Business.
- Illinois Department of Revenue - Sales & Use Taxes (Certificate of Registration).
- Illinois Department of Revenue - Withholding Income Tax (employer registration).
- Illinois Department of Financial and Professional Regulation - Professional licensing (IDFPR).
- Illinois Secretary of State - Business Services (entity formation).
- 35 ILCS 120 - Retailers' Occupation Tax Act.
- 805 ILCS 180 - Limited Liability Company Act.
- Illinois General Assembly - Retailers' Occupation Tax Act (full text).
- IRS - Business Taxes.
- IRS - Get an Employer Identification Number (free EIN).
- Cornell Legal Information Institute - License (Wex).
LegalGlass provides general information for educational purposes and is not a law firm or a substitute for advice from a licensed attorney or tax professional. Laws, fees, and thresholds change; verify current requirements with the Illinois Department of Revenue, IDFPR, and your local government before acting.