Legal Guidance on Entity Selection, Entity Formation and Structure
Entity formation is a foundational legal decision that affects liability exposure, tax treatment, governance, financing, and long‑term flexibility. Linnemeyer Law provides legal guidance on entity selection, entity formation, helping clients align their legal structure with business operations and long‑term objectives.
Business Entity Structure Types
- Sole Proprietorships
- Limited Liability Companies (LLCs)
- Single-Member LLCs
- Multi-Member LLCs
- Professional Limited Liability Companies (PLLCs)
- Series LLCs
- Corporations
- C Corps; S Corps
- Nonprofit Corporations
Entity Selection Considerations
Selecting the appropriate entity structure requires consideration of liability protection, tax implications, ownership and governance, regulatory requirements, and future transactions such as financing, acquisitions, or asset ownership. Linnemeyer Law works with clients to evaluate these factors and select entity structures that support both current operations and long‑term objectives.
About Sole Proprietorships
Sole proprietorships are generally used only in limited circumstances and are often transitional structures rather than long‑term operating entities. By default, any business with one owner that has not formed an entity, is automatically a sole proprietorship. A sole proprietorship provides no limited liability protection.
About Limited Liability Companies (LLCs), Series LLCs and Professional Limited Liability Companies (PLLCs)
Limited Liability Companies (LLCs) are among the most commonly used entity structures due to their flexibility, liability protection, and adaptable tax treatment. LLCs can have one owner (Single-Member) or multiple owners (Multi-Member). Professional Service-related businesses that are licensed by the IDFPR may need to be formed as a Professional Limited Liability Company (PLLC).
Single Member LLCs
Single‑member LLCs are commonly used by businesses with one owner seeking liability protection while maintaining a simple ownership and governance structure. This entity type offers operational flexibility while allowing income and losses to pass through to the owner for tax purposes.
Key Considerations
- Ownership: One member
- Governance: Member‑managed or manager‑managed structure
- Liability: Limited liability protection for the owner
- Tax Treatment: Disregarded entity by default for federal tax purposes; S‑corporation election may be available in appropriate circumstances
- Flexibility: Minimal formalities compared to corporations
- Common Uses: Closely held operating businesses, professional practices, and single‑owner investment entities
Want to learn more about Single Member LLCs in Illinois? Visit our LLC page.
Multi-Member LLCs
Multi‑member LLCs are used where two or more owners share ownership in a business or investment while seeking liability protection and flexible governance. This structure allows owners to tailor economic and management arrangements through an operating agreement.
Key Considerations
- Ownership: Two or more members, which may include individuals or entities
- Governance: Member‑managed or manager‑managed, as defined in the operating agreement
- Liability: Limited liability protection for members
- Tax Treatment: Taxed as a partnership by default; S‑corporation election may be available in appropriate circumstances
- Flexibility: Highly customizable ownership, profit‑sharing, and control provisions
- Common Uses: Real estate investment groups, family‑owned businesses, and closely held operating companies
Want to learn more about Multi-Member LLCs in Illinois? Visit our LLC page.
Series LLCs
Series LLCs allow a single parent LLC to establish multiple internal series, each holding separate assets and liabilities, while operating under one overarching legal entity. This structure is frequently used to segregate risk across multiple assets or projects while maintaining administrative and cost efficiency.
Key Considerations
- Structure: Parent LLC with one or more distinct series
- Ownership: One or more members; ownership interests may vary by series
- Liability: Liabilities of one series are generally isolated from other series if statutory requirements are met
- Tax Treatment: Series are typically treated as separate entities for federal tax purposes; S‑corporation elections may be available in appropriate cases
- Administration: Separate records and accounting required for each series
- Common Uses: Real estate investment structures, multi‑asset ownership, and project‑based operations
Want to learn more about Series LLCs? Visit our Series LLC page.
PLLCs
PLLCs are used by licensed professionals who are required by state law to operate through a compliant professional entity while maintaining the liability protection and flexibility of an LLC structure. This entity type allows professional practices to operate within regulatory requirements while preserving pass‑through taxation and adaptable ownership arrangements.
Key Considerations
- Eligibility: Limited to businesses providing professional services subject to licensure by the IDFPR
- Ownership: One or more owners, all of whom must hold the required professional licenses, with some exceptions
- Liability: Protection against general business liabilities; no protection for professional malpractice or negligence
- Tax Treatment: Pass‑through taxation by default; S‑corporation tax election may be available in appropriate circumstances
- Regulatory Compliance: Licensing, registration, and ongoing compliance requirements imposed by applicable professional boards
- Common Uses: Medical, healthcare, accounting, and other regulated professional practices
Want to see if your business requires a PLLC designation? Visit the PLLC page.
About Corporations
A corporation is a separate legal entity owned by shareholders and governed by a formal management structure that includes directors and officers. Corporations are often used where ownership complexity, outside investment, or formal governance structures are required.
From a liability perspective, corporations provide limited liability protection to shareholders for business obligations, subject to applicable exceptions. Corporations are subject to statutory governance requirements, including the adoption of bylaws, maintenance of corporate records, and observance of corporate formalities.
For tax purposes, a corporation may be taxed as either a C corporation or, if eligibility requirements are met, as an S corporation. C corporations are taxed at the entity level, with dividends taxed again at the shareholder level, while S corporations generally provide pass‑through taxation to shareholders. The appropriate tax classification depends on ownership structure, growth plans, and overall tax planning considerations.
Corporations are commonly used by businesses planning to raise capital, bring on outside investors, issue equity‑based compensation, or operate with more formal governance requirements, including growth‑stage companies and investment‑backed enterprises.
About C Corps
C Corporations are commonly formed by companies seeking outside investment or planning for equity‑driven growth. The structure accommodates multiple classes of stock, institutional investors, and more formal governance requirements.
Key Considerations
- Ownership: Unlimited number of shareholders permitted
- Governance: Board of directors and officers; formal governance and record‑keeping requirements
- Liability: Limited liability protection for shareholders
- Tax Treatment: Entity‑level taxation; dividends taxed at the shareholder level
- Common Uses: Investment‑backed companies, growth‑stage businesses, and entities planning to raise capital or scale
Want to learn more about C Corp eligibility? Visit the Corporations page.
About S Corps
S Corporations are commonly used by closely held businesses seeking pass‑through taxation and potential payroll‑related tax efficiencies while operating within a corporate governance framework. This structure can be advantageous for profitable businesses where owners actively participate in operations and want to avoid entity‑level taxation while maintaining formal ownership and management requirements.
Key Considerations
- Ownership: Limited to 100 shareholders; shareholders must meet eligibility requirements
- Governance: Board of directors and officers; corporate governance requirements apply
- Liability: Limited liability protection for shareholders
- S‑Corporation Tax Rules: Subject to pass‑through taxation, shareholder compensation requirements, and restrictions on classes of stock under Subchapter S of the Internal Revenue Code
- Eligibility: Must satisfy IRS eligibility requirements, including shareholder type and ownership limitations
- Common Uses: Profitable, closely held businesses seeking pass‑through taxation within a corporate structure
Want to learn more about S Corp eligibility? Visit the Corporations page.
Nonprofit Corporations
Non‑profit corporations are formed to pursue charitable, educational, religious, or other public‑benefit purposes and operate under a governance structure focused on mission rather than ownership. These entities may qualify for federal and state tax‑exempt status, allowing income to be reinvested in furtherance of the organization’s mission rather than distributed to individuals.
Key Considerations
- Purpose: Must be organized and operated exclusively for qualifying charitable or public‑benefit purposes
- Governance: Managed by a board of directors with fiduciary duties to the organization and its mission
- Liability: Limited liability protection for directors, officers, and employees, subject to applicable exceptions
- Tax‑Exempt Status: Eligibility to apply for federal tax‑exempt status, such as under Section 501(c)(3) of the Internal Revenue Code
- Use of Funds: Earnings must be reinvested in the organization’s mission; no private inurement permitted
- Compliance: Ongoing reporting and regulatory obligations at the state and federal levels
- Common Uses: Charitable organizations, educational institutions, religious entities, and other mission‑driven organizations
Want to learn more about nonprofit eligibility? Visit the Corporations page.
Related Business Services
Entity formation is often the starting point for broader legal planning. Linnemeyer Law also advises clients on business transactions, commercial real estate ownership, financing, and restructuring as businesses grow and evolve.