Corporation vs. Professional Corporation: Key Differences
File your business using LegalNature today.
A professional corporation (PC) is a specific type of corporation available to licensed professionals such as doctors, lawyers, accountants, and engineers, who may be required by their state to incorporate in this form to practice as a business entity. The key difference between a regular corporation and a professional corporation is that a PC typically limits ownership to licensed members of the same profession and might not fully shield shareholders from personal liability for their own professional malpractice. Both entity types are formed through articles of incorporation and offer limited liability protection for non-malpractice business debts.
If you are a licensed professional ready to incorporate your practice, the distinction between a corporation and a professional corporation is one you should understand before filing your company with the state. In many states, a standard corporation is not an option for a medical practice, law firm, or accounting practice. State licensing law requires the professional corporation structure instead. This guide explains what separates these two entity types, who qualifies for a PC, and the real advantages and disadvantages of each, so you can make the right decision before you file.
At this time, LegalNature only offers professional corporation creation in the state of California.
| Attribute | Corporation | Professional Corporation |
|---|---|---|
| Available to | Any legal business purpose | Licensed professionals |
| Ownership restriction | None | Shareholders and owners licensed in the same profession |
| Malpractice liability | Generally shielded | Partial - personal malpractice generally unprotected |
| Non-malpractice general liability | Shielded | Shielded |
| Taxation default | C corp (most states) | C corp (most states) |
| S corp election available? | Yes | Yes, in many states |
| Name requirements | Standard | Must include "P.C." "Prof. Corp." or similar in most states |
| Ongoing compliance | Corporate formalities | Corporate formalities + professional licensing board requirements |
Table of Contents
What Is a Professional Corporation?
A professional corporation is a corporate entity structure specifically designed for licensed professionals who are legally required or permitted by their state to operate their practice as a corporation.
Unlike a standard corporation which any entrepreneur can form for virtually any lawful business purpose, a PC exists within both corporate law and state professional licensing law simultaneously. That dual oversight is what makes it distinct.
The professional corporation designation was created because most state corporation statutes historically prohibited the delivery of licensed professional services through a standard corporate entity. The concern was accountability: if anyone could own shares in a medical or legal practice, there would be no guarantee that the people controlling the business were actually licensed to practice. States solved this by creating a separate entity category: the professional corporation.
PCs restrict ownership to licensed members of the same profession and subjects the entity to ongoing oversight from the relevant state licensing board.
The professions that commonly qualify for PC status include physicians, dentists, attorneys, certified public accountants (CPAs), engineers, architects, veterinarians, and psychologists. However, the eligible professions list is determined by each state's business corporation act and varies meaningfully across jurisdictions.
In some states, chiropractors and physical therapists may also form PCs; in others, the list is narrower. Always confirm your profession's eligibility with your state's Secretary of State and the relevant licensing board before filing.
You may also encounter the term "professional service corporation" (PSC) which is used in states such as Minnesota and Wisconsin. This term describes the same entity type under a different statutory name. For practical purposes, a professional service corporation and a professional corporation may often be considered the same structure.
Corporation vs. Professional Corporation: Key Differences
The quick reference table above gives you the at-a-glance version. Here is the depth behind those distinctions.
Ownership and Eligibility
In a regular corporation, ownership is open: individuals, other companies, trusts, and investment funds can all hold shares. There are no credential requirements attached to becoming a shareholder. This is what makes standard corporations attractive for raising outside capital and bringing in investors.
A professional corporation operates under a fundamentally different rule. Every shareholder must hold an active license in the same profession the PC is organized to practice. A medical PC cannot have a non-physician shareholder. A law firm PC cannot include a CPA or a silent investor as a shareholder, even if that person is deeply involved in the business operationally. The moment a shareholder loses their license — through revocation, suspension, or retirement — most states require that shareholder to divest their PC shares within a specified time period, commonly 90 days, though this varies.
This ownership restriction is the tradeoff for the professional structure: it ensures licensing accountability at the shareholder level, but it makes PCs poor vehicles for outside investment or multi-disciplinary ownership arrangements.
Liability Protection
This is the most important distinction — and the one most often misrepresented.
Both a regular corporation and a professional corporation shield their shareholders from personal liability for the entity's general business debts — things like unpaid vendor contracts, commercial leases, and employee claims. If your PC cannot pay a supplier, the supplier generally cannot come after your personal bank account.
Where a professional corporation diverges sharply from a regular corporation is malpractice liability. A PC often does not protect an individual professional from personal liability for their own professional negligence. If an attorney in a law firm PC commits malpractice, that attorney generally remains personally exposed for the claim. The PC structure protects the other shareholders from being personally liable for that attorney's malpractice, but it typically does not protect the professional who actually committed the negligent act.
This nuance matters enormously in practice. It means that even if you properly form and maintain a professional corporation, you are not using the entity structure to escape accountability for your own professional conduct. Malpractice insurance remains essential and a PC does not make it optional.
A regular corporation, by contrast, provides a full liability shield for all shareholder acts unrelated to their own direct negligence. In a standard business context, a shareholder of a regular corporation is typically not personally liable for the actions of an employee or officer, as long as the shareholder has not personally participated in or perpetuated the wrongful act.
Taxation
Both regular corporations and professional corporations default to C corporation taxation in nearly every state, meaning the entity pays corporate income tax on its profits, and shareholders pay individual income tax again when those profits are distributed as dividends. This "double taxation" is the primary tax disadvantage of the C corp structure.
Both entity types can potentially avoid double taxation by electing S corporation status with the IRS, which allows profits and losses to pass through directly to shareholders' personal tax returns. However, S corp eligibility rules for professional corporations vary by state. Not every state allows this tax treatment for professional corporations.
Elect your S corporation tax treatment today
Get StartedCorporate Formalities
Both entity types require the same baseline corporate formalities: bylaws, a board of directors, officer appointments, annual shareholder meetings, and meeting minutes. Neither structure gives you a pass on maintaining the corporate formalities that preserve the liability shield. If those formalities collapse, a court may be able to "pierce the corporate veil" and hold shareholders personally liable regardless of entity type.
Professional corporations carry an additional compliance layer beyond standard corporate requirements. Most states require ongoing confirmation that all shareholders remain licensed and in good standing with the relevant licensing board. Some states require the PC itself to register with the licensing board separately from the Secretary of State filing and to report any changes in shareholder licensing status. This means operating a professional corporation involves coordinating compliance across two regulatory bodies, not just one.
Benefits of a Professional Corporation
Professional corporations offer licensed professionals a structured, legally recognized way to operate their practice as a business entity, with both liability and tax advantages over practicing as a sole proprietor or general partnership.
The key benefits include:
- Limited liability for non-malpractice business debts. If the PC enters contracts, hires employees, or takes on leases, shareholders are generally shielded from personal liability for those obligations. This is a substantial protection that sole proprietors and general partnership members do not have.
- Protection from other shareholders' malpractice. While a PC does not shield you from your own professional negligence, it does shield you from personal liability for the malpractice committed by other professionals in your practice. Without a PC (or PLLC), partners in a general partnership can be personally liable for each other's professional negligence.
- Potential tax savings through S corp election. Professionals who elect S corp status can potentially split income between a reasonable salary and distributions, reducing the portion of income subject to self-employment tax. This is the same payroll tax strategy available to S corp shareholders generally, subject to IRS reasonable compensation requirements. This election is not available for PCs in all states, though.
- Facilitates group practice. A professional corporation allows multiple licensed professionals to co-own and operate a practice together within a formal, legally recognized structure with defined ownership percentages, governance rules, and succession planning built into the bylaws.
- Fringe benefit advantages. Corporations, including PCs, can offer certain employee benefits — such as health insurance and retirement plan contributions that may be deductible at the entity level, providing tax efficiency not available to unincorporated practices.
- Professional credibility. Operating as a corporation signals established, formal practice to clients, insurers, lenders, and referral sources.
Disadvantages of a Professional Corporation
A professional corporation is not the right structure for every licensed professional, and understanding its limitations before filing can save significant legal and compliance costs down the road.
The key disadvantages include:
- No malpractice shield for personal acts. This bears repeating because it is the most commonly misunderstood limitation. A PC will typically not protect you from personal liability arising from your own professional negligence. If avoiding malpractice exposure is your primary concern, entity structure alone generally cannot accomplish that. You should obtain malpractice insurance regardless.
- Ownership is usually restricted and non-transferable to outsiders. You generally cannot bring in outside investors, silent partners, or co-owners from a different profession. All shareholders should be licensed in the same professional field. This makes raising outside capital difficult in a PC structure and limits equity arrangements to licensed colleagues.
- Higher ongoing compliance burden. PCs must satisfy both corporate formality requirements and state licensing board compliance obligations. If a shareholder's license lapses, the PC must respond quickly or risk regulatory action. The administrative overhead typically is meaningfully higher than a sole proprietorship or general partnership.
- Default double taxation. Without an S corp election, the PC pays corporate income tax and shareholders pay individual income tax on distributions. For profitable practices, this can result in a significant tax inefficiency.
- Not available for all professions in all states. PC eligibility is state specific. Some professions that qualify in one state may not qualify in another. If your practice operates across state lines, you may face inconsistent entity requirements by jurisdiction.
- Limited flexibility on dissolution. If a shareholder loses their license and must divest their shares, and no other licensed professional is available to purchase those shares, dissolution may be required. Bylaws should address this scenario explicitly, but it introduces structural fragility that a regular corporation does not face.
When to Choose a Regular Corporation Instead
A regular corporation is the appropriate choice when state law does not require or permit a professional corporation structure for your business or when ownership flexibility is a priority.
Consider a standard corporation if:
- Your business does not provide licensed professional services. If you are forming a technology company, retail business, or any enterprise that does not require individual professional licensure to operate, a standard corporation is the right structure.
- You plan to raise outside investment. Venture capital, angel investors, and most institutional investors expect to hold shares in a standard corporation. A PC's ownership restrictions make it typically incompatible with this type of capitalization strategy.
- Your practice involves multiple licensed disciplines. A multi-disciplinary practice, for example a firm that combines licensed engineers and licensed architects, may face difficulty fitting within a single PC's same-profession ownership requirement. A standard corporation or other structure may offer more flexibility, though this varies significantly by state and should be reviewed with an attorney.
- You want maximum management flexibility. Standard corporations allow non-owner executives and outside board members without licensing constraints. PCs generally do not.
Consulting with a business attorney before choosing between a corporation and a professional corporation is strongly recommended, particularly if your practice operates in multiple states or involves multiple professional disciplines.
Professional Corporation vs. PLLC: What's the Difference?
A professional limited liability company (PLLC) is the LLC-equivalent structure for licensed professionals and serves the same fundamental purpose as a professional corporation — providing a formal, legally recognized business entity for professional practices.
The practical differences come down to three areas:
- Management structure. A PC operates under the standard corporate governance model: board of directors, officers, bylaws, annual meetings. A PLLC operates under an operating agreement with significantly more management flexibility. If you prefer the LLC model's informality and operational freedom, a PLLC may be a better fit.
- State availability. Not every state offers PLLCs. States that do not recognize the PLLC structure may require licensed professionals to form a PC instead. Confirm which structures your state permits before choosing.
- Tax treatment. PLLCs are taxed as partnerships or single-member LLCs by default, with S corp election also available. PCs default to C corp taxation. Depending on your practice's income level and structure, one default may be more advantageous than the other. A tax advisor can model the comparison for your specific situation.
For most licensed professionals, the choice between a PC and a PLLC comes down to state availability and preference for corporate vs. LLC governance. Both are legitimate, professionally appropriate structures. Consulting with an attorney familiar with your state's licensing board requirements is the clearest path to making the right call.
Frequently Asked Questions
What is the difference between a corporation and a professional corporation?
A professional corporation (PC) is a type of corporation available exclusively to licensed professionals such as attorneys, physicians, accountants, and engineers who are required by state law to use this entity structure when incorporating. The primary differences from a regular corporation are ownership restrictions (PC shareholders must hold an active license in the same profession) and a partial liability carve-out (professionals remain personally liable for their own malpractice, though not for the malpractice of other shareholders). Both entity types are formed through articles of incorporation and subject to the same corporate formality requirements.
Who can form a professional corporation?
Only licensed professionals whose state recognizes their profession for PC status can form a professional corporation. Common eligible professions include physicians, dentists, attorneys, CPAs, engineers, architects, and veterinarians, but the list varies by state. Confirm eligibility with your state's Secretary of State and the relevant licensing board before filing.
What professions require a professional corporation?
The professions required or permitted to form a professional corporation vary by state, but commonly include physicians, dentists, attorneys, CPAs, engineers, architects, veterinarians, and psychologists. In most states, any profession that requires a state license to practice and involves personal service to clients is eligible, or in some cases required, to operate as a PC rather than a standard corporation. Check your state's business corporation act and relevant licensing board rules to confirm your profession's specific requirements.
Does a professional corporation protect against malpractice?
A professional corporation provides only partial malpractice protection. It shields shareholders from personal liability for the professional negligence of other shareholders in the practice, but it does not protect an individual professional from claims arising from their own malpractice. For this reason, malpractice insurance remains essential even when operating as a PC.
What is the difference between a professional corporation and a PLLC?
A professional limited liability company (PLLC) is the LLC equivalent for licensed professionals and serves the same basic purpose as a professional corporation. The differences come down to management structure (corporations require a board and officers; PLLCs use an operating agreement), formality requirements, and state availability. Not all states offer PLLCs. States that do, often allow the professional to choose between a PC and a PLLC.
Conclusion
The difference between a corporation and a professional corporation comes down to who can own the entity, how liability is distributed, and what your state requires for your specific profession. A professional corporation is the right structure when state law requires licensed professionals to incorporate in this form. It provides the limited liability and tax benefits of corporate status, with ownership and governance rules designed around the realities of professional practice. A regular corporation remains the better choice when ownership flexibility matters, outside investment is on the table, or the business simply does not require a licensed professional to operate.
The most important thing to understand before filing is that a professional corporation does not eliminate your personal liability for your own professional negligence. Both structures require careful formation, and consulting with a business attorney is strongly recommended when the decision affects how a licensed professional practice is structured.
LegalNature offers guidance to navigate the nuances of business filing and formation documents across all 50 states and the District of Columbia. LegalNature's articles of incorporation makes it straightforward to prepare and file your formation documents correctly, with state-specific templates designed to meet your jurisdiction's requirements. LegalNature offers a 30-day money-back guarantee. If you're not happy, then we're not happy. Give us a call and let us help.