Professional License Requirements in Illinois (2026)
Illinois requires professional licenses for dozens of occupations and professions. If you operate a licensed profession in Illinois, you must obtain credentials from the Illinois Department of Financial and Professional Regulation (IDFPR) before rendering services. You may also structure your practice as a Professional Limited Liability Company (PLLC), which requires a separate certificate of registration from IDFPR in addition to your personal license.
What Is a Professional Limited Liability Company (PLLC)?
A Professional Limited Liability Company is a business entity designed specifically for licensed professionals. Under the Professional Limited Liability Company Act (805 ILCS 185/), an LLC rendering professional services requiring IDFPR licensure must obtain a certificate of registration before operating. Illinois law treats professional LLCs as subject to the Limited Liability Company Act except where the PLLC Act controls. The PLLC structure allows you to maintain personal liability protection while operating a licensed practice, provided all organizers, managers, or members who render the licensed service hold the required individual license.
IDFPR maintains a dedicated Professional Limited Liability Company licensing page at https://idfpr.illinois.gov/profs/pllc.html with online application pathways. A professional LLC may not render IDFPR-licensed professional services without the required certificate of registration. Before issuing registration, IDFPR verifies that all organizers, managers, or members rendering the licensed service meet the profession's licensing conditions.
Which Professions Require a Professional License in Illinois?
Illinois requires professional licenses across healthcare, law, accounting, engineering, architecture, real estate, and dozens of other fields. The Illinois Department of Financial and Professional Regulation oversees licensing for professions including physicians, nurses, dentists, psychologists, attorneys, certified public accountants, professional engineers, architects, professional land surveyors, real estate brokers and agents, insurance producers, and many others.
You can verify whether your profession requires an IDFPR license by visiting the IDFPR website or contacting the licensing board for your field. If your profession is licensed by IDFPR, you must hold an active license before rendering services, whether you operate as a sole proprietor, partnership, corporation, or PLLC. Operating without a required license exposes you to civil penalties, criminal liability, and disciplinary action against your personal license.
Illinois Licensing Boards and Agencies
The Illinois Department of Financial and Professional Regulation (IDFPR) is the primary state licensing authority for most professions. IDFPR oversees individual professional licenses and PLLC registrations. You can reach IDFPR through the main state website at https://www.illinois.gov/business/registration-licenses-permits.html, which serves as the central portal for all Illinois registrations, licenses, and permits.
Beyond IDFPR, other state agencies issue specialized licenses. The Illinois Department of Revenue handles business tax registration through MyTax Illinois. Local city and county licensing offices issue local business licenses, zoning approvals, and health permits. The Illinois Secretary of State processes LLC formation and PLLC filings. For liquor licenses, you must apply to your local municipality or county authority.
Illinois does not operate around a single statewide general business license. Instead, you must identify which agencies regulate your specific profession and business activities, then apply to each separately.
PLLC vs. LLC for Licensed Professionals
If you hold a professional license, you must choose between forming a standard LLC or a PLLC. A standard LLC is appropriate if your business does not render IDFPR-licensed professional services. A PLLC is required if you render services that require an IDFPR license.
The key difference is the certificate of registration. A PLLC must obtain a certificate of registration from IDFPR before operating. A standard LLC does not need IDFPR approval unless it later begins rendering licensed services. If you form a standard LLC and later decide to render licensed professional services, you must convert to a PLLC and obtain the certificate of registration.
All members, managers, and organizers of a PLLC who render the licensed service must hold an active, unrestricted license in that profession. IDFPR will verify licensing status before approving your PLLC registration. If a member's license lapses, expires, or is suspended, the PLLC must remove that member or cease rendering that service.
Common Professions Requiring Illinois Licenses
Healthcare professions include physicians (MD/DO), nurses (RN/LPN), dentists, dental hygienists, psychologists, clinical social workers, marriage and family therapists, professional counselors, and many others. Each healthcare profession has specific education, examination, and continuing education requirements.
Legal and financial professions include attorneys, certified public accountants (CPAs), enrolled agents, and tax preparers. Attorneys must be licensed by the Illinois Supreme Court. CPAs must meet education and examination requirements set by the Illinois Department of Financial and Professional Regulation.
Engineering and architecture require professional engineer (PE) and architect licenses. Both professions require specific education (typically a four-year degree), examination, and documented work experience before licensure.
Real estate professionals include brokers and salespersons. Illinois requires real estate brokers to hold an active broker license and maintain a sponsoring broker relationship. Real estate salespersons must work under a sponsoring broker and hold an active salesperson license.
Insurance producers must hold a license to sell insurance products. Illinois distinguishes between health, life, property and casualty, and other insurance lines, with separate licensing for each.
Other licensed professions in Illinois include professional land surveyors, landscape architects, home inspectors, security contractors, private detectives, and many others. Check with IDFPR or your profession's licensing board to confirm requirements.
PLLC Application Process
To form a PLLC in Illinois, you must complete two separate filings: first, form your LLC with the Illinois Secretary of State; second, apply for a PLLC certificate of registration with IDFPR.
Step 1: Form the LLC
File Articles of Organization with the Illinois Secretary of State, Department of Business Services, Limited Liability Division. The filing fee is $150. You can file online at https://apps.ilsos.gov/llcarticles/index.jsp or by mail to 501 S. Second St., Rm. 350, Springfield, IL 62756 or 69 W. Washington St., Ste. 1240, Chicago, IL 60602. Contact (217) 524-8008 with questions.
Your Articles of Organization must include the LLC name (containing "Limited Liability Company," "LLC," or "L.L.C."), principal place of business address, registered agent name and registered office address (both in Illinois), and the names and addresses of all organizers and initial managers. The registered agent must be an individual who resides in Illinois or an entity authorized to transact business in Illinois.
Step 2: Apply for PLLC Registration
After your LLC is formed, apply for a certificate of registration with IDFPR. Visit the IDFPR PLLC page at https://idfpr.illinois.gov/profs/pllc.html for the application form and instructions. IDFPR will verify that all members, managers, and organizers who render the licensed service hold an active, unrestricted license in that profession.
Submit your application with proof of each member's license, your LLC formation documents, and any other materials IDFPR requires. Processing times vary by profession and application completeness. Once approved, IDFPR issues your certificate of registration, and you may begin operating as a PLLC.
Continuing Education Requirements
Most Illinois licensed professions require continuing education (CE) to maintain an active license. The specific CE requirements—hours per renewal period, approved course types, and renewal deadlines—vary by profession.
For example, physicians must complete continuing medical education (CME) hours as set by their specialty board or the Illinois State Medical Society. Attorneys must complete Continuing Legal Education (CLE) hours as required by the Illinois Supreme Court. CPAs must complete continuing professional education (CPE) hours as set by the Illinois Department of Financial and Professional Regulation.
You are responsible for tracking your CE requirements and renewing your license before expiration. If your license expires or lapses, you cannot legally render services in that profession. If you hold a PLLC, an expired license for any member rendering services may trigger compliance issues with your PLLC registration.
Check your profession's licensing board or IDFPR for specific CE requirements, approved providers, and renewal deadlines. Most professions allow you to complete CE online, in person, or through a combination of methods.
Multi-State Practice Considerations
If you operate a licensed practice in multiple states, you must comply with licensing requirements in each state where you render services. Illinois does not automatically recognize licenses issued by other states. You must apply for an Illinois license in your profession, even if you hold a current license in another state.
Some professions offer reciprocity or comity agreements that streamline multi-state licensing. For example, some states allow attorneys licensed in other states to practice under reciprocity rules. However, Illinois does not grant automatic reciprocity for most professions. You must apply for an Illinois license and meet Illinois-specific education, examination, and experience requirements.
If you form a PLLC in Illinois and operate in multiple states, you must also comply with each state's PLLC or professional entity requirements. Some states do not recognize PLLCs or require separate registration. Consult with a business attorney licensed in each state where you operate to ensure compliance.
For remote or telehealth services, verify whether rendering services to Illinois residents requires an Illinois license, even if you are physically located in another state. Most healthcare professions require an Illinois license if you treat Illinois patients, regardless of your location.
Tax Registration and Business Permits
In addition to professional licensing, you must register for state and local taxes and obtain any required business permits. The Illinois Department of Revenue requires businesses that will make taxable sales or hire employees to register before making sales or hiring. Register through MyTax Illinois or Form REG-1 at https://tax.illinois.gov/. There is no registration fee for standard Illinois business tax registration.
Illinois imposes a 6.25% state general merchandise sales tax before local add-ons. If you sell taxable goods or services, you must collect and remit sales tax. Professional services (such as legal, accounting, or medical services) are generally exempt from sales tax, but verify your specific service with the Department of Revenue.
You must also file an annual report with the Illinois Secretary of State. The annual report is due before the first day of your LLC's anniversary month each year. The anniversary month is the month in which your LLC was organized. The annual report fee is $75. File online at the Secretary of State website.
If you operate as a pass-through entity (LLC taxed as a partnership or S corporation), you owe 4.95% individual Illinois income tax on your share of profits, plus a possible 1.5% replacement tax on Illinois-taxable income. Consult a tax professional to understand your specific tax obligations.
Key Takeaways
Professional licensing in Illinois is mandatory for dozens of occupations and is separate from business formation. You must obtain both your individual professional license from IDFPR (or the relevant licensing board) and, if applicable, a PLLC certificate of registration before rendering services. All members of a PLLC who render licensed services must hold an active license. You must also register for state and local taxes, file annual reports, and comply with continuing education requirements to maintain your license. Contact the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/ or the Illinois Secretary of State at (217) 524-8008 to confirm requirements for your specific profession.
Contact Information
Illinois Department of Financial and Professional Regulation (IDFPR)
Professional Limited Liability Company Licensing: https://idfpr.illinois.gov/profs/pllc.html
Main Website: https://idfpr.illinois.gov/
Illinois Secretary of State, Department of Business Services, Limited Liability Division
Phone: (217) 524-8008
Springfield Office: 501 S. Second St., Rm. 350, Springfield, IL 62756
Chicago Office: 69 W. Washington St., Ste. 1240, Chicago, IL 60602
Online LLC Filing: https://apps.ilsos.gov/llcarticles/index.jsp
Illinois Department of Revenue
Business Tax Registration: https://tax.illinois.gov/
MyTax Illinois: https://tax.illinois.gov/
Illinois Business Registration and Permits Portal
https://www.illinois.gov/business/registration-licenses-permits.html