How to Form a Professional Corporation in 2026

A professional corporation protects you from your partner's malpractice. It does not protect you from your own.

That single asymmetry is the whole point of the structure, and it is the thing most guides on the subject leave out.

Key takeaways

• Licensed professionals usually cannot form a standard LLC. Most states require a professional entity instead.
• A PC or PLLC shields you from claims against other practitioners in the firm, and from ordinary business debts. Your own negligence stays yours.
• The PLLC is recognised in roughly 29 states plus DC. California, Delaware and Oregon are among those that do not allow one.
• Which entity you use depends on your state and your profession: PC, PLLC, PA or RLLP.
• The hard step is not the filing. It is licensing board approval, which most generic formation services do not handle.

What a professional corporation is

A professional corporation, or PC, is a company formed to practise a licensed trade. Its close cousin is the professional limited liability company, or PLLC. Same idea, applied to an LLC.

Both exist for one reason. States did not want licensed practitioners hiding behind an ordinary corporate shield. So they built a separate category with its own rules.

Who typically needs one:

• Doctors, dentists and other medical practitioners
• Lawyers
• Certified public accountants
• Architects and engineers
• Therapists, psychologists and counsellors
• Veterinarians, chiropractors and optometrists

The exact list is set by your state, and it does not always match what you would guess. Check your own state's statute or your licensing board rather than a national list.

The liability rule that actually matters

Here is what a PC does and does not do.

States built it this way on purpose. What you owe a client or a patient is not something a filing is allowed to wipe out. So the shield covers the firm and the other owners. It does not cover the person whose work caused the claim.

So here is the rule. A PC is not a substitute for malpractice cover. It changes who else gets pulled in, not whether you do. Carry the insurance anyway.

PC or PLLC? It depends on your state

There is no single answer, and the map is genuinely uneven.

The PLLC is recognised in roughly 29 states plus the District of Columbia. Where it is not on offer, licensed trades use one of three other forms: a PC, a professional association, or a registered limited liability partnership.

Three states worth knowing about because they surprise people:

• California does not allow PLLCs. Licensed trades there generally use a PC.
• Delaware does not offer the PLLC either, despite being known as the entity-friendly state.
• Oregon is also on that list.

Your trade matters as much as your state. Some states allow one form for lawyers and another for medical practices. Check both before you file anything.

Advantages

It walls owners off from each other. In a firm with several practitioners this is the main reason to incorporate. One partner's claim does not reach what the others own.

Tax options. A PC can elect S corp treatment if it meets the IRS eligibility rules. That lets owners split income between salary and payouts. The maths and the break-even point are in LLC vs S corp.

Continuity. The firm survives a change of owner, which matters when practices are bought, sold or inherited.

Credibility and contracting. Hospitals, insurers and large clients often prefer, or require, a contract with a firm rather than a person.

Disadvantages

Your own malpractice is still yours. Covered above, and it is the drawback most often glossed over.

Who can own it. Most states require every owner, director and officer to hold the right licence. So you generally cannot bring in an outside investor who is not licensed in your trade.

Paperwork. A PC carries the full corporate load: bylaws, a board, yearly meetings, minutes and a stock ledger. A PLLC is lighter. That is part of why states offering both see more PLLCs.

Board approval. Many states make your licensing board approve the name, or issue a certificate, before or after the state filing. This is the step that turns a ten-minute job into a multi-week one.

How to form one

Five steps, and the order matters.

1. Check which form your state and trade require. PC, PLLC, PA or RLLP. Ask your licensing board, not a formation website.
2. Check the name rules. Most states limit what a PC can be called. Many require a tag such as "P.C." or "PLLC". Some allow nothing but the owners' surnames.
3. Get board sign-off if required. In several states this comes before the Secretary of State filing. Do it out of order and you file twice.
4. File the articles with the Secretary of State, including any licence numbers the form requires.
5. File the board certificate after where the state wants proof of sign-off once you have formed.

State fees match any other filing in that state, from $35 in Montana to $500 in Massachusetts. A professional filing sometimes adds a small surcharge. Your board may charge its own fee too. The Small Business Administration is a decent starting point for the licence side.

Which filing service can actually help

This is where honest advice parts ways with what most articles say.

Generic formation services are built around the standard LLC and corporation. Several will file a PC, but none of the five services we track handles the licensing board step for you. That is the part that causes delays and rejections.

What they can do usefully:

• Swyft Filings files the widest range of entity types on our chart, including corporations and nonprofits, from $0 plus state fees. Its registered agent bills $149 a quarter, which works out near $596 a year.
• LegalZoom is the only service we track with an attorney network. For a form whose rules shift by state and by trade, that access is worth more than it is for a standard LLC. Registered agent runs $249 a year.
• Northwest is the cheapest to keep running at $125 a year, and can serve as registered agent regardless of who files.

The honest advice for a PC: talk to a lawyer who practises in your state, or at least to your licensing board, before paying anybody to file. The $99 you might save on a filing service is not worth a rejected form, or a company set up in the wrong class.

Common questions

Can a licensed professional just form a normal LLC? In most states, no. Licensed trades are pointed to a PC or PLLC instead, and the wrong choice can create licensing problems. Federal tax treatment is the same either way. The IRS classifies an LLC by member count, not by trade.

Does a PC protect me from malpractice claims? Not your own. It covers claims arising from a partner's work, and ordinary business debts. Your own negligence stays with you.

PC or PLLC, which is better? Whichever your state offers for your trade. Where both are on offer, the PLLC carries lighter formalities.

Can I have a non-licensed business partner? Usually not. Most states require every owner of a PC to hold the right licence.

Can a professional corporation elect S corp status? Yes, if it meets the IRS rules: no more than 100 shareholders, one class of stock, and no partnership, corporate or non-resident alien owners.

For the general entity comparison see LLC vs corporation and S corp vs C corp. Provider scoring is on our best LLC services chart and explained in how we rank.

State rules for professional entities vary by state and by profession and change without notice. Provider prices read on 18 August 2026. This content is not legal, financial or accounting advice; for a professional entity in particular, take state-specific advice before filing.