You passed the licensing exam, signed a lease, and filed articles of organization for a plain LLC through an online service in twenty minutes. Clean, cheap, done — except your state does not recognize it. In New York, Texas, and a dozen other states, a licensed professional who organizes as a regular LLC has formed an entity the licensing board will not accept, which means you are practicing without the liability shield you thought you bought. The filing fee was the cheapest part of that mistake.
This is the trap most licensed professionals walk into: doctors, lawyers, CPAs, architects, engineers, dentists, therapists, and surveyors cannot simply pick whatever entity looks convenient. State law restricts which structures each profession may use, who may own them, and what has to happen before the secretary of state will even accept the filing. The three structures that matter are the regular LLC, the professional limited liability company (PLLC), and the professional corporation (PC). Here is how they differ, which states force the choice, and how to pick the right one.
Why States Restrict Professional Entities at All
The restrictions exist to protect the public, not to inconvenience you. Three policy goals drive nearly every state rule in this area:
Keeping practice under licensed control. Most states require that every owner of a professional entity hold a license in the same profession the entity practices. The point is to stop unlicensed investors from owning — and effectively directing — a medical practice, law firm, or engineering shop. Fee-splitting and corporate-practice-of-medicine doctrines back this up in healthcare especially.
Preserving board oversight. Your licensing board keeps jurisdiction over you personally no matter what entity you form. Many states require board approval, a certificate of good standing, or a separate registration before a PLLC or PC can operate, so the board always knows which entity you practice through.
Blocking the malpractice shield. No entity on earth lets a licensed professional disclaim liability for their own negligence. State laws say so explicitly: organizing as a PLLC or PC never insulates you from claims arising from your own professional acts. Anyone who tells you otherwise is selling something.
Once you accept those premises, the rest of the rules read as implementation details.
The Regular LLC: Flexible, Familiar — and Off-Limits in Many States
The regular limited liability company is the default small-business entity for good reason: pass-through taxation, flexible management, no board meetings or minutes, and limited liability for business debts. Any individual, company, or trust can own one, and members can split profits however the operating agreement says.
For licensed professionals, the problem is eligibility. States fall into three rough camps:
- Mandatory professional-entity states. States such as New York, Texas, and North Carolina require licensed professionals rendering professional services to organize as a PLLC, PC, or registered LLP — not a plain LLC. File a regular LLC for your dental practice and the filing may be rejected outright, or accepted by the secretary of state and then rejected by your licensing board when you try to register the practice.
- Permissive states. Some states let professionals use a regular LLC but still impose ownership and control restrictions through the licensing statutes. The LLC works, but unlicensed ownership that would be fine for a coffee shop can still violate your profession's rules.
- Prohibited-LLC states. California famously does not permit licensed professionals — lawyers, doctors, accountants, architects, and others — to practice through any LLC at all, professional or otherwise. California professionals choose between a professional corporation and, for a few professions such as law and accounting, a registered limited liability partnership.
The practical lesson: never assume the LLC that worked for your friend's e-commerce store works for your practice. Check your state licensing board's entity rules before you pay any filing fee.
The PLLC: An LLC Rebuilt Around a License
A professional limited liability company is a regular LLC with guardrails bolted on. The economics and tax treatment closely resemble an LLC, but formation and ownership follow profession-specific rules:
Ownership is restricted to licensed professionals. In most states every member must be licensed in the same profession the PLLC practices — all dentists, all attorneys, all CPAs. Some states allow narrow exceptions (a surviving spouse may hold an interest temporarily; some allow a small minority of non-licensed owners), but the default rule is same-profession ownership only. Mixing professions in one PLLC is prohibited in most states, which matters for multidisciplinary practices.
Formation requires proof of licensure. Expect to submit license numbers, certificates of good standing, or a pre-approval letter from your licensing board along with the articles of organization. A few states require board approval before you file; others let you file first and register with the board after. Either way, budget extra weeks versus a plain LLC.
The name must signal the form. Most states require a designator such as PLLC, P.L.L.C., or Professional Limited Liability Company in the entity name, and some require board sign-off on the name itself.
Taxation mirrors the LLC. A multi-member PLLC is taxed as a partnership by default; a single-member PLLC is a disregarded entity. Either can elect S corporation treatment, and many profitable practices do once earnings comfortably exceed a reasonable salary — the S election is where the self-employment tax planning lives, not in the choice between PLLC and PC.
The PLLC is usually the path of least resistance where it is available: LLC-style flexibility with the licensing compliance built in.
The Professional Corporation: The Older, More Formal Sibling
The professional corporation predates the LLC by decades, and in some states it remains the only professional entity allowed. A PC works like a regular corporation — shareholders, directors, officers, bylaws, annual meetings, minutes — with the same licensing restrictions layered on top: shareholders and often directors and officers must be licensed in the profession, share transfers to unlicensed buyers are void, and the board typically must approve formation.
Why would anyone choose the heavier structure?
It may be your only option. California professionals cannot form a PLLC, so the PC is the standard vehicle. A handful of other states similarly authorize PCs for professions they exclude from PLLC statutes.
S corporation treatment is natural. PCs frequently elect S status, which fits neatly onto corporate stock and payroll mechanics. PLLCs can reach the same result, but practices that already run formal payroll and want stock-based ownership find the PC familiar.
Some referral and ownership regimes assume corporations. In a few niches — certain insurance appointments, hospital medical-staff bylaws, legacy buy-sell structures — corporate stock is the expected currency, and a PC slots in more easily.
The costs are real: corporate formalities you must actually observe, stricter recordkeeping, and in some states higher franchise taxes or gross-receipts fees on corporations. If your state offers both forms, the PC rarely wins on convenience — it wins when law or counterparties demand it.
The default tax treatment also differs: without an S election, a PC is a C corporation subject to double taxation — the corporation pays tax on its profits and shareholders pay again on dividends. Most small professional corporations elect S status precisely to avoid this, but the election has its own deadlines and eligibility rules, so do not assume it is automatic.
The Liability Truth Nobody's Marketing Mentions
Read this paragraph twice, because it is the most misunderstood sentence in professional-entity law: neither a PLLC, a PC, nor any other entity protects you from liability for your own malpractice. Every state statute says so. Your personal assets stand behind your own professional negligence regardless of the letters after your firm's name. That is what malpractice insurance is for, and no filing substitutes for it.
What these entities do protect is everything else:
- Business debts and obligations. Office leases, equipment loans, vendor contracts, and credit lines belong to the entity. If the practice fails, creditors generally cannot reach your personal assets for debts you did not personally guarantee. Note the qualifier — landlords and lenders routinely demand personal guarantees from small practices, which waive this protection contract by contract.
- Other owners' malpractice. If your partner commits malpractice, the entity and the partner's assets are exposed, but your personal assets generally are not — the single most important reason multi-owner practices incorporate rather than operating as general partnerships.
- Employee and premises liability. Slip-and-fall claims, employment disputes, and data-breach costs land on the entity first.
Solo practitioners sometimes conclude that entities buy them nothing beyond debt protection. That understates it: separating practice assets from personal assets still matters for every contract you sign, every employee you hire, and every lease you negotiate. But go in clear-eyed — the malpractice shield you are imagining does not exist.
Side-by-Side: PLLC vs. PC vs. Regular LLC
| Feature | Regular LLC | PLLC | Professional Corporation |
|---|---|---|---|
| Who may form | Anyone | Licensed professionals, usually same profession | Licensed professionals, usually same profession |
| Available everywhere | Yes | No — not recognized in California; profession coverage varies | Yes, with profession coverage varying by state |
| Board approval needed | No | Often yes | Often yes |
| Default taxation | Pass-through (partnership or disregarded) | Pass-through (partnership or disregarded) | C corporation (double tax unless S elected) |
| S election available | Yes | Yes | Yes — the common choice |
| Formalities | Operating agreement; few statutory meetings | Same as LLC, plus license maintenance | Bylaws, meetings, minutes, stock records |
| Shields own malpractice | No | No | No |
| Shields business debts | Yes | Yes | Yes |
The Seven Mistakes That Unwind the Protection
1. Filing a plain LLC where the state forbids it. The secretary of state and the licensing board are different agencies that do not always cross-check at filing time. An LLC the state accepted can still be an entity your board refuses to recognize — leaving you practicing as a de facto general partnership with unlimited personal liability. Verify with the board first.
2. Admitting an unlicensed owner. Giving equity to a non-licensed spouse, investor, administrator, or key employee violates same-profession ownership rules in most states and can void the transfer, trigger board discipline, or forfeit the entity's authority to practice. There are lawful ways to share economics with non-licensed contributors — profit-sharing bonuses, management agreements — but ownership is usually not one of them.
3. Mixing professions in one entity. A dentist and a physical therapist generally cannot co-own one PLLC. Multidisciplinary practices need state-specific structuring, sometimes involving separate entities with shared-services agreements. Do not assume one wrapper covers two licenses.
4. Forgetting the board registration step. Forming the entity is step one; registering it with your licensing board — with fees, certificates, and sometimes inspections — is step two. Practices that skip step two operate an unregistered entity, which is its own violation in many states.
5. Practicing across state lines on one filing. A PLLC formed in Texas cannot simply open an office in Oklahoma. Each state where you render services typically requires foreign qualification plus local licensure for the professionals working there. Telehealth and remote work have made this trap bigger, not smaller.
6. Letting a license lapse and ignoring the entity. When the sole member's license lapses, is suspended, or is revoked, many states require the PLLC or PC to wind down, convert, or transfer ownership within a grace period. An entity owned by someone no longer licensed to practice is living on borrowed time.
7. Electing S status and skipping payroll discipline. The S election saves self-employment tax only if owner-employees take reasonable salaries through payroll first. Distributing all profits with no W-2 wages is the fastest route to a reclassification audit. Calendar the election deadline too — it is generally due within the first two and a half months of the tax year it takes effect.
A Decision Framework That Fits on an Index Card
Work through these questions in order:
- What does your state allow for your profession? If California bars LLCs for your field, the PC decision is made. If your state mandates a professional entity, the plain LLC is out. This question alone resolves most cases.
- Solo or shared? Solo practices optimize for simplicity — usually a PLLC where available. Multi-owner practices need buy-sell terms, and the choice between an operating agreement and shareholder agreement matters less than having one drafted properly.
- One profession or several? Multiple professions usually mean multiple entities plus service agreements. Price that complexity before promising a partner a single shared company.
- How do you want to be taxed? Model pass-through versus S-election economics with your CPA at your actual income level. The S election's payroll costs only pay off above a threshold that varies by practice — there is no universal breakeven.
- How much formality will you actually maintain? A PC whose minutes were never kept is weaker in every dispute than a PLLC with clean records. Pick the structure whose upkeep you will really perform.
Then revisit the answer every few years. Adding partners, expanding to new states, crossing the S-election breakeven, or selling the practice can each flip the right choice.
Keep the Entity's Books Worthy of the Entity
Here is the part professionals neglect: the liability shield only holds if the entity behaves like an entity. Commingled bank accounts, undocumented owner draws, personal expenses run through the practice, and a general ledger nobody reconciles are exactly what a creditor's attorney exhibits when asking a court to pierce the veil. Separate accounts from day one, run every owner withdrawal as a documented draw or payroll payment, and reconcile monthly.
That discipline is also what makes tax elections valuable. An S election on top of sloppy books produces a tax return your CPA has to reconstruct at hourly rates; clean books produce a return that practically writes itself. The Beancount documentation on getting started shows how plain-text accounting gives a practice a transparent, auditable ledger where every transaction is traceable — which is precisely the posture you want if your entity's separateness is ever questioned.
Keep Your Practice's Finances Organized From Day One
As you choose your entity and open your practice, maintaining clear financial records is essential — both for the tax elections that make the structure pay and for the corporate separateness that keeps the liability shield intact. Beancount.io provides plain-text accounting that gives you complete transparency and control over your financial data — no black boxes, no vendor lock-in. Get started for free and see why developers and finance professionals are switching to plain-text accounting.
