Illinois Professional LLC Formation Guide

Forming a

Professional Limited Liability Company (PLLC)

in Illinois allows licensed professionals to operate with limited liability while adhering to state regulations for regulated services. This structure protects personal assets from business debts and malpractice claims specific to professional activities.

Understanding PLLCs for Licensed Professionals

A PLLC is a specialized business entity designed exclusively for individuals holding professional licenses issued by the Illinois Department of Financial and Professional Regulation (IDFPR). Unlike standard LLCs, PLLCs impose strict rules on ownership, management, and operations to safeguard public interest in fields requiring expertise and ethical standards.

Key distinctions include mandatory licensing for all members and managers, profession-specific naming requirements, and additional registration with IDFPR post-formation. This setup ensures that only qualified practitioners deliver services such as healthcare, legal advice, or therapy.

Eligible Professions for Illinois PLLCs

Illinois authorizes PLLCs for a defined list of professions regulated by IDFPR. All members must hold active licenses in the same field, preventing mixed-ownership models common in general LLCs.

• Healthcare fields: Dentistry, medicine, veterinary medicine, clinical psychology.
• Mental health services: Social work, clinical professional counseling, marriage and family therapy, sex offender evaluation and treatment.
• Legal and related: Law (with specific statutes), and certain dental specialties under dedicated rules.

Dentists, for instance, must use designations like “Professional Dental Limited Liability Company” in their name. Professionals in optometry, nursing, chiropractic, or accounting may face additional naming conventions requiring shareholder or member surnames.

Key Requirements Before Formation

License Verification

Every member and manager must possess a valid, unencumbered Illinois license for the intended service. Verify status via IDFPR’s online portal to confirm eligibility and compliance with ownership restrictions.

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Registered Agent Designation

Appoint a registered agent with a physical Illinois street address, available during business hours to receive legal documents. This can be a member, employee, or professional service provider.

Choosing and Reserving a Compliant Name

PLLC names must be unique, distinguishable from existing entities, and include mandatory designators. The Illinois Secretary of State reviews for availability.

Requirement	Details
Mandatory Suffix	“Professional Limited Liability Company,” “PLLC,” “P.L.L.C.,” or similar abbreviations.
Prohibited Terms	No “Corporation,” “Inc.,” “Corp.,” or implications of unauthorized purposes.
Personal Names	May require full/last name of licensed members (e.g., law, dentistry, accounting).
Availability Check	Search Secretary of State database; optional 90-day reservation via Form LLC-1.15.

Avoid fictitious names unless permitted by the profession’s board. For example, veterinary PLLCs must clearly signal their professional status.

Step-by-Step Formation Process

1. Draft Articles of Organization: Use Form LLC-5.5, specifying PLLC status, purpose (professional services), agent details, and initial managers/members.
2. File with Secretary of State: Submit online or mail with $150 fee (as of 2026). Include purpose statement tied to licensed services.
3. Obtain EIN: Apply via IRS for federal tax ID, essential for banking and taxes.
4. Draft Operating Agreement: Outline ownership percentages, management structure, profit sharing, and dissolution rules. Mandatory for multi-member PLLCs.
5. Register with IDFPR: Post-Secretary of State filing, submit online application via IDFPR portal. Provide Articles PDF, FEIN, formation date, and business address.

IDFPR approval is crucial; some professions require prior licensing board consent.

Post-Formation Compliance and Operations

After formation, maintain annual requirements: pay $75 LLC fee to Secretary of State, renew IDFPR registration, and file biennial personal license renewals.

• Update IDFPR on membership changes, as all must remain licensed.
• Comply with profession-specific ethics, like client confidentiality in counseling PLLCs.
• Secure professional liability insurance, often required by boards.

PLLC vs. Standard LLC: A Comparison

Aspect	PLLC	Standard LLC
Ownership	All members licensed in same profession	No licensing required
Name Rules	Must include “PLLC” and profession indicators	“LLC” sufficient
Regulation	IDFPR oversight + Secretary of State	Secretary of State only
Liability Protection	Professional malpractice personally liable	Full business liability shield
Formation Cost	$150 + IDFPR fees	$150

Note: PLLCs shield business assets from personal creditors but not vice versa for professional negligence.

Tax Considerations for PLLCs

PLLCs default to pass-through taxation like LLCs: sole-member as disregarded entity, multi-member as partnership. Elect S-Corp or C-Corp status via IRS Form 2553/8832 if beneficial. Illinois imposes 4.95% personal income tax on pass-through income; no entity-level tax.

Common Pitfalls and Best Practices

• Mixing Professions: Prohibited; all members same license type.
• Skipping IDFPR: Mandatory for IDFPR-licensed services; failure voids protections.
• Inadequate Agreement: Customize for professional indemnity and succession.
• Best Practice: Consult attorney for Articles and IDFPR filings to ensure compliance.

Frequently Asked Questions

Can a single licensed professional form a PLLC?

Yes, solo practitioners qualify if licensed by IDFPR for eligible services.

Is IDFPR registration required immediately after filing Articles?

Yes, submit promptly with Articles copy; it’s separate from personal licensure.

What if a member loses their license?

The PLLC risks dissolution; notify IDFPR immediately and update membership.

Can non-professionals own part of a PLLC?

No, all equity holders must be licensed in the field.

How much does it cost to maintain a PLLC?

Annual $75 to Secretary of State, plus IDFPR fees and personal renewals (~$100-300 biennially).

Advanced Strategies for PLLC Success

For growing practices, consider manager-managed structures to add administrative roles without diluting ownership. Multi-state expansion requires foreign qualification where allowed, checking reciprocal PLLC rules. Integrate technology for compliance tracking, like automated license renewal reminders.

In mergers, ensure successor entity meets PLLC criteria. For estate planning, operating agreements should address license transfer upon death, often naming successors.