PLLC vs LLC
A PLLC, or professional limited liability company, is a version of the LLC built for state-licensed professions. In many states a licensed professional cannot use an ordinary LLC to deliver licensed services and must instead form a PLLC. The two structures share the same DNA — pass-through taxation by default, an operating agreement, a liability shield for ordinary business debts — but the PLLC layers on rules that come from the licensing world rather than the business-entity world. The most important of those rules is also the most misunderstood: a PLLC does not shield a professional from their own malpractice.
This article compares the two structures and explains who is required to use which. It is informational, not legal advice, and the requirements vary by state and by profession in 2026, so the relevant licensing board and a local attorney should confirm the specifics.
What makes a PLLC different
A PLLC exists to let licensed professionals get LLC-style liability protection while staying inside the rules their licensing boards impose. The professions involved are the ones a state licenses individually — commonly law, medicine, dentistry, accounting, architecture, engineering, and similar fields. The defining traits are that the entity is formed specifically to render a licensed service, and that the people who own it generally must hold the relevant license themselves. An ordinary LLC, by contrast, can be owned by anyone and can do almost any lawful business. That difference in ownership and purpose is what separates the two on paper.
Underneath the surface, the two structures are deliberately similar, and that similarity is intentional. Lawmakers did not want licensed professionals to lose the liability protection and tax flexibility that ordinary businesses enjoy simply because their work happens to require a license. So the PLLC keeps the familiar LLC machinery — members, managers, an operating agreement, pass-through taxation, a shield against ordinary business debts — and bolts on the licensing rules that protect the public. The result is a hybrid: an LLC in its mechanics, a regulated profession in its constraints. Understanding it that way makes the differences easier to predict, because almost every PLLC rule that an ordinary LLC lacks traces back to a licensing-board concern rather than a business-entity one.
When a state requires a PLLC instead of an LLC
Whether a licensed professional must use a PLLC depends entirely on the state. Some states require licensed professions to organize as a PLLC and will not allow them to deliver licensed services through a regular LLC. Others permit a standard LLC, and a few channel professionals into a professional corporation (PC) instead, with no PLLC option at all. The trigger is usually the combination of two facts: the work requires a state license, and the entity will actually perform that licensed work. A licensed architect running an architecture practice may need a PLLC; the same architect running an unrelated rental business could use an ordinary LLC for that.
The practical consequence is that the entity choice follows the activity, not the person. A licensed professional is not required to wrap every venture they touch in a PLLC; the requirement attaches to the act of delivering the licensed service through a business. This distinction matters when professionals diversify. A dentist who opens a side business selling oral-care products is engaged in retail, not the practice of dentistry, and that retail venture would typically be an ordinary LLC. The dental practice itself, where licensed care is rendered, is what triggers the PLLC analysis. Owners who blur this line — routing licensed and unlicensed work through a single entity — can create compliance problems, because the licensing board's rules were written for the entity that actually practices.
There is also a timing element worth noting. Because the licensing board is often involved, forming a PLLC can take longer than spinning up an ordinary LLC, and the sequence of steps may be dictated by the state. Some states want the board's certification in hand before the secretary of state will accept the filing; others reverse the order. A professional who assumes a PLLC forms as quickly as a standard LLC can be caught off guard when the board's review adds weeks to the timeline. Planning for that lead time is part of doing the comparison properly.
Board approval and all-licensed members
Forming a PLLC typically adds steps that an ordinary LLC does not face. Many states require the licensing board to approve or certify the formation before or alongside the state filing, confirming that the organizers are licensed and in good standing. The ownership rule is the second common requirement: in many states every member — and sometimes every manager — must hold the professional license the PLLC is organized to practice. That blocks passive outside investors from owning a piece of the practice, which is precisely the point; the rule exists to keep professional judgment in licensed hands. Names often must include a designator such as PLLC, and some states require proof of professional liability coverage.
The malpractice carve-out
This is the part owners most often get wrong. A PLLC shields a professional's personal assets from the business debts and obligations of the practice — a vendor it failed to pay, a lease it defaulted on, a slip-and-fall claim against the office — in the same way an ordinary LLC would. What it does not do is shield a professional from liability for their own malpractice. If a professional makes a negligent error in their licensed work, the PLLC does not protect their personal assets from a claim arising out of that error. The structure also does not let a professional escape liability for the malpractice of those they supervise in the way the rules assign it. In practice this means a PLLC limits ordinary business exposure but cannot substitute for professional liability insurance, which is what actually backstops malpractice risk.
The reasoning behind the carve-out is principled rather than arbitrary. A licensing system exists to hold individual professionals accountable for the quality of their work, and allowing a professional to hide behind an entity for their own negligence would undercut that accountability entirely. So the law lets the PLLC protect the things that have nothing to do with professional judgment — the rent, the equipment loan, the unrelated tort — while leaving the professional personally answerable for their own clinical, legal, or technical errors. For a multi-member practice, this also shapes how partners think about exposure: one professional's malpractice generally does not pierce another partner's personal assets, but the practice's shared assets and the negligent professional's own assets remain at risk. The lesson owners take from this is consistent across professions: the entity is a tool for ordinary business risk, and insurance is the tool for the risk that the entity was never designed to cover.
Formation differences at a glance
| Factor | PLLC | Ordinary LLC |
|---|---|---|
| Who can own it | Generally only licensed professionals | Anyone, including outside investors |
| What it does | Renders a state-licensed service | Almost any lawful business |
| Licensing-board step | Often required before or with filing | None |
| Naming | Usually must include "PLLC" | Must include "LLC" |
| Business-debt shield | Yes, like an LLC | Yes |
| Own malpractice shield | No — personal liability remains | Not applicable |
| Default taxation | Pass-through | Pass-through |
States that do not use PLLCs
Not every state offers the PLLC form. Some require licensed professionals to use a professional corporation instead, taxed and governed under corporate rules rather than LLC rules. Others allow a standard LLC to deliver professional services and simply do not have a separate professional-entity statute for LLCs. Because the landscape is genuinely state-specific, a professional planning to form an entity should confirm three things before filing: whether the state recognizes PLLCs, whether the profession is on the list that must use one, and what the licensing board requires. Getting this wrong can mean a rejected filing or, worse, an entity that does not satisfy the board's rules for practicing.
The professional corporation alternative is worth understanding even for owners who expect to use a PLLC, because in some states it is the only choice. A PC is a corporation organized for licensed practice, and it carries corporate formalities — a board, bylaws, shareholder meetings, and corporate-style taxation unless an election is made. For some professionals the PC route is fine, particularly where the practice is large or already accustomed to corporate governance. For a solo or small practice in a state that allows the PLLC, the PLLC is usually the lighter-weight option, since it inherits the LLC's simpler administration. The key is that the menu of options is set by the state, not by the professional's preference, so the first research step is always to find out which forms the state actually permits for the specific profession.
Who each is for
An ordinary LLC is for any business that does not require an individual professional license to operate — retail, consulting outside regulated fields, real estate holding, e-commerce, and the like. A PLLC is for a state-licensed professional in a state that requires it, where all the owners hold the relevant license and the entity exists to deliver that licensed service. The decision is rarely a matter of preference; it is dictated by the state and the licensing board. The practical takeaway for professionals is twofold: confirm which structure the state requires before forming anything, and never treat the entity — PLLC or otherwise — as a replacement for malpractice insurance, because the one risk the structure cannot wall off is a professional's own negligent work.
Frequently asked questions
What is the difference between a PLLC and an LLC?
A PLLC is a professional LLC for state-licensed professions, often required when the entity delivers a licensed service. It shares pass-through taxation and a business-debt shield with an ordinary LLC but typically requires all owners to be licensed and may need licensing-board approval to form.
Does a PLLC protect me from malpractice claims?
No. A PLLC shields personal assets from the practice's ordinary business debts, but it does not shield a professional from liability for their own malpractice. Professional liability insurance, not the entity, is what addresses malpractice risk.
Who can own a PLLC?
In many states every member must hold the professional license the PLLC is organized to practice, which keeps passive outside investors from owning the practice. The exact ownership rules vary by state and profession.
Which professions need a PLLC?
Typically state-licensed fields such as law, medicine, dentistry, accounting, architecture, and engineering. Whether a PLLC is required depends on the state; some allow a regular LLC and others require a professional corporation instead.
Do all states offer PLLCs?
No. Some states require licensed professionals to use a professional corporation, and others allow an ordinary LLC for professional services. A professional should confirm with the state and the licensing board before filing.
Is a PLLC taxed differently from an LLC?
By default, no. A PLLC is taxed as a pass-through entity like an ordinary LLC and can elect corporate or S-corp tax treatment under the same rules. The differences are in ownership, naming, and licensing requirements, not default taxation.