Decision guide for business owners

Professional Corporation vs. LLC: Separate the Legal Form From the Tax Election

Licensed professionals must solve two connected questions: which entity their state and profession allow, and how that entity should be taxed and operated.

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Reviewed by Bryan Martin, CPA•Updated October 30, 2026•Educational, not individualized advice

Answer first

A professional corporation and a professional or regular LLC are state-law entity forms. The permitted choice varies by profession and state, while federal and state tax classification may be a separate decision. Confirm licensing, ownership, liability, governance, tax, payroll, and multi-state rules before filing anything.

Written by Bryan Martin, CPA, Managing Partner and Founder of Taxstra. Last updated October 30, 2026. Taxstra is a CPA firm for high income earners, business owners and real estate investors, serving 1,000+ clients in all 50 states.

Professional corporation and LLC decision map

Because professional-entity rules are state-specific, use this table to organize questions for counsel and the tax adviser rather than as a filing recommendation.

Decision area	Professional corporation	LLC or professional LLC	Verify before choosing
State availability	Authorized for qualifying professions in some states	LLC or professional LLC treatment varies	Profession and licensing jurisdiction
Ownership	May restrict shareholders and directors	May restrict members and managers	Owner licenses and future owners
Tax classification	Corporate tax framework with possible elections	Default classification may vary; elections may be available	Federal and every relevant state
Governance	Corporate records and officer roles	Operating agreement and manager/member rules	Who controls decisions and transfers
Professional liability	Does not replace personal professional responsibility	Does not replace personal professional responsibility	Malpractice and insurance advice
Physician owner: federal default	Corporation filing Form 1120, unless it makes an S election	One owner: Schedule C. Two or more owners: Form 1065	Whether your state medical board allows the form at all

Decision flow

Resolve legal eligibility before optimizing tax

Which state licenses the profession and the owners?

Entity availability, naming, ownership, registration, and governance rules start with the professional licensing jurisdiction.

Likely next step: State-specific legal eligibility memo

Will the practice operate or register in other states?

A permitted home-state form may face different naming, registration, tax, or ownership rules elsewhere.

Likely next step: Multi-state registration and tax map

Who will own and work in the practice?

Model licensed and nonlicensed owners, future partners, compensation, benefits, and transfer restrictions.

Likely next step: Ownership and compensation design

Which tax classification supports the operating plan?

Compare the permitted alternatives using projected profit, owner pay, benefits, administration, and state rules.

Likely next step: Tax election and implementation calendar

Entity law comes first

A tax preference cannot override professional licensing rules.

Ask counsel to confirm which entity forms the profession may use, who may own or manage them, required naming, governance documents, and foreign-registration rules.

Professional entities generally do not eliminate an individual professional’s responsibility for their own licensed work. Liability and insurance advice belong with qualified counsel and the insurance adviser.

Permitted form and name
Licensed-owner requirements
Director or manager rules
Registration in each state
Transfer restrictions
Insurance coordination

Tax classification is a second layer

The same legal form can sometimes have more than one tax path.

Once the legal form is confirmed, compare available tax classifications using a realistic forecast and complete owner-compensation model. Include payroll, benefits, reimbursements, state filings, and administrative cost.

The books must distinguish company activity from owner activity and maintain the records needed for the selected classification. A late or incomplete implementation can undermine the intended result.

Projected practice profit
Owner compensation
Benefits and reimbursements
State entity taxes and fees
Payroll and return workflow
Equity and distribution records

Design for the next owner

Growth can change the answer faster than current profit does.

Test whether the structure supports a new professional, a retiring owner, an associate buy-in, outside capital, or practice sale. Restrictions that seem remote can become the central issue during a transaction.

Review the structure when the practice enters another state, adds an owner, changes compensation, takes on material debt, or prepares for a sale.

Associate buy-in
Retirement and redemption
New state registration
Sale or merger path
Lender requirements
Annual entity review

What PLLC means for a doctor

It is a business form after the name, not a medical credential.

PLLC stands for professional limited liability company. When you see "Jane Smith, MD, PLLC," the MD is her license and the PLLC is the legal entity her practice operates through. It says nothing about training or specialty.

A PLLC does not shield a physician from their own malpractice. Florida is a clear example: a professional is personally liable for their own negligent or wrongful acts, and the entity is liable up to the full value of its property. Other states word this differently, so confirm yours with counsel and your malpractice carrier.

A PLLC also is not available everywhere. The Medical Board of California lists physicians operating a practice as a limited liability company among prohibited structures, so physicians there need a different form. Before forming anything, check your state medical board and corporate practice of medicine rules. If you are a physician weighing the tax side, start with our physician S corp election guide or see how we work as a CPA for physicians.

State medical board rules
Corporate practice of medicine limits
Who may own the entity
Required name wording
Malpractice coverage
Registration in other states

How a PLLC is taxed

There is no PLLC tax form. The IRS looks at owners and elections.

A one-owner PLLC is disregarded by default, so practice profit goes on Schedule C and is subject to self-employment tax. With two or more owners it is a partnership filing Form 1065. Either can elect corporate treatment, and an eligible LLC that files Form 2553 does not also need Form 8832. The election is due within 2 months and 15 days of the start of the tax year it takes effect, or during the prior year.

A professional corporation starts in a different place. It is incorporated under state law, so it is a corporation for federal tax purposes and files Form 1120 at the flat 21% rate unless it makes an S election. Profit paid out as dividends is taxed again to the owner.

Illustrative example, not a client result: a single physician with no other wages has $400,000 of profit in a PLLC. On Schedule C, 2026 SE tax including the 0.9% Additional Medicare Tax is about $35,115. With an S election and a hypothetical $230,000 salary, combined payroll tax is about $29,818, a difference of about $5,297. Above the $184,500 wage base the gain comes mostly from Medicare taxes, so payroll cost, a second return, and lower plan compensation can use up a good part of it. Salary must be supportable as reasonable compensation.

You can test your own numbers with our S corp tax calculator. It is an educational estimate, not a recommendation for your practice.

One owner: Schedule C by default
Two or more owners: Form 1065
S election: Form 1120-S
PC with no S election: Form 1120
Salary required with an S election
State entity taxes and fees

PLLC vs PA, and can a PC be an S corp?

Often the same licensing law, with different default tax treatment.

Yes, a professional corporation can be an S corp if it meets the tests: a domestic corporation with no more than 100 shareholders, only eligible shareholders, no nonresident alien shareholders, and one class of stock. The professional label does not change those tests, though your state may add its own limits on who can be an owner.

PA usually means professional association, a corporate form used in some states. In Florida, chapter 621 covers both. A professional corporation name uses wording such as "professional association" or "P.A.," and a PLLC formed since 2014 uses "PLLC" or similar wording. Owners of either must generally be licensed to render the same service, or be another professional entity. Physicians are on the covered list.

The practical tax difference: a Florida PA starts as a corporation, while a PLLC starts as a disregarded entity or partnership. With S elections, both can end up filing Form 1120-S. Other states use these names differently, so read this as a Florida example rather than a national rule.

PA and PC: corporate form
PLLC: LLC form
S election possible for each if eligible
Owner license rules apply to each
State name rules differ
Counsel confirms the form

Worked situations

How the decision changes by company

Single-state practice

One licensed owner and a stable footprint

The immediate choices are limited by one profession and one licensing jurisdiction.

Recommendation: Confirm permitted entity forms, then model tax classification

Growing group

Associates may become owners

Buy-in, voting, compensation, and transfer rules must work before the first ownership offer.

Recommendation: Coordinate governance, valuation, and tax design now

Multi-state care

Professionals serve clients across borders

Licensing, registration, payroll, income sourcing, and entity obligations may differ by state.

Recommendation: Create a state-by-state legal and tax implementation map

Authoritative Sources

Citations reflect U.S. federal tax law as of the article's last reviewed date.

Frequently asked questions

Is a professional corporation the same as an S corporation?

No. A professional corporation is a state-law entity form. S corporation treatment is a tax classification with separate eligibility and election requirements.

Can a professional LLC elect S corporation treatment?

It may be possible when federal and state requirements are met, but the professional entity, owners, timing, payroll, state treatment, and elections require individualized review.

Does either entity eliminate malpractice liability?

Entity protection and professional liability are legal and insurance questions. A professional generally remains responsible for their own licensed work; confirm the scope with counsel and the insurance adviser.

What if I practice in multiple states?

Review professional licensing, foreign qualification, ownership, naming, payroll, income sourcing, tax registrations, and annual filings in every state involved.

When should the structure be revisited?

Revisit it before adding owners, entering states, changing compensation, raising capital, reorganizing, or selling the practice.

What does PLLC mean after a doctor's name?

Professional limited liability company. It is the legal entity the practice operates through, not a credential. It does not generally protect a physician from liability for their own malpractice, and some states, including California, do not allow physicians to practice through an LLC.

How is a PLLC taxed?

By default, a one-owner PLLC is disregarded and reports on Schedule C, and a PLLC with two or more owners is a partnership filing Form 1065. It can elect corporate or S corporation treatment if it qualifies. There is no separate PLLC tax return.

Can a professional corporation be an S corp?

Yes, if it meets the S corporation tests, including no more than 100 shareholders, only eligible shareholders, and one class of stock, and it files Form 2553 on time. Without the election, it is taxed as a C corporation at the 21% federal rate.

What is the difference between a PLLC and a PA in Florida?

Both fall under Florida Statutes chapter 621 and generally need licensed owners. A PA is a corporate form, so it starts as a corporation for federal tax. A PLLC starts as a disregarded entity or partnership. Either can file Form 1120-S with an eligible S election.

Coordinate the legal entity and tax operating model

Taxstra can build the tax and accounting comparison and work with your attorney on the state-law and licensing questions.

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Professional Corporation vs. LLC: Separate the Legal Form From the Tax Election

Professional corporation and LLC decision map

Resolve legal eligibility before optimizing tax

Which state licenses the profession and the owners?

Will the practice operate or register in other states?

Who will own and work in the practice?

Which tax classification supports the operating plan?

Entity law comes first

Tax classification is a second layer

Design for the next owner

What PLLC means for a doctor

How a PLLC is taxed

PLLC vs PA, and can a PC be an S corp?

How the decision changes by company

One licensed owner and a stable footprint

Associates may become owners

Professionals serve clients across borders

Authoritative Sources

Frequently asked questions

Related services and tools

Small business tax planning

Entity structure planning

Business tax returns

S corp election for physicians

CPA for physicians

S corp tax calculator

Coordinate the legal entity and tax operating model