In the United States, PLC and PLLC usually refer to the same thing: a professional limited liability company, with some states allowing either abbreviation at the end of the firm’s name. The difference between PLC and PLLC in that context is cosmetic. The meaningful difference appears only when “PLC” is used in its other sense, as the United Kingdom’s Public Limited Company, which is an entirely separate business structure built for publicly traded corporations.
Same Entity, Different Label in the US
Several states let a professional LLC append either abbreviation to its name. Virginia’s Professional Limited Liability Company Act, for example, explicitly permits a professional LLC to use “P.L.C.,” “PLC,” “P.L.L.C.,” or “PLLC,” treating all four as equivalent designations for the same entity.1Virginia Code Commission. Virginia Professional Limited Liability Company Act Whether the name ends in PLC or PLLC, the legal structure, liability shield, and tax treatment are identical.
Not every state follows that pattern. Some recognize only the PLLC abbreviation; others have separate professional entity statutes using different terminology. Before you file, check your state’s business filing office for which abbreviations it accepts. The entity itself doesn’t change based on which letters you pick.
What a UK Public Limited Company Is
Outside the US, PLC means something completely different. In the United Kingdom, it designates a Public Limited Company, a corporate form designed to raise capital from the public by selling shares on stock exchanges. A UK PLC must meet a minimum share capital requirement, file detailed annual accounts with Companies House, and answer to regulators including the Financial Conduct Authority.
Every UK company must prepare accounts reporting on performance, activities, and financial position at year-end, and PLCs carry the heaviest reporting burden because their shares trade publicly.2GOV.UK. Preparing and Filing Companies House Accounts Corporation tax on a UK PLC’s profits runs at 25% for companies earning above £250,000.3GOV.UK. Corporation Tax Rates and Allowances
If you’re a licensed professional in the US weighing business structures, the UK PLC is not on your list. The rest of this article is about the US professional entity, whatever abbreviation your state uses for it.
Who Has to Use One
Professional LLCs exist because most states prohibit licensed professionals from forming a standard LLC. When a service requires a state license, the state generally wants every owner of the business providing it to hold that license. A regular LLC has no such restriction, so a separate entity type fills the gap.
Professions that typically must use a professional entity include doctors, lawyers, accountants, architects, engineers, dentists, chiropractors, psychologists, and other mental health practitioners. The exact list varies by state, and some states define “professional service” broadly as anything requiring a license, certification, or registration. Kentucky’s statute, for example, gives licensing boards authority over the qualifications of members and managers, the transfer of ownership interests, and how professional services are provided through the entity.4Justia Law. Kentucky Revised Statutes 275.010 – Powers of Limited Liability Companies
Roughly a dozen states don’t allow PLLCs at all. In some, professionals can form a standard LLC instead; in others, a Professional Corporation is the only option. California is the most notable example, where state law prohibits LLCs from rendering professional services. Where a PLLC isn’t available, a Professional Corporation or Limited Liability Partnership is usually the alternative.
What the Liability Shield Actually Covers
A PLLC protects your personal assets from the company’s ordinary business debts. If the practice can’t pay its lease or a vendor invoice, creditors generally cannot reach your house or personal bank accounts. That part works the same way as a standard LLC’s shield.
The exception is your own professional malpractice. Forming a PLLC does not insulate you from claims arising from your own negligent or wrongful acts while providing professional services. Florida’s statute puts it directly: each officer, member, or employee is “personally liable and accountable only for negligent or wrongful acts or misconduct committed by that person, or by any person under that person’s direct supervision and control.”5The Florida Legislature. Florida Statutes Title XXXVI Chapter 621 What the entity does protect you from is your business partners’ malpractice. If a co-owner makes a professional mistake, the resulting claim falls on them individually.
That’s why malpractice insurance still matters after you form a PLLC. The entity shields you from business debts. Insurance shields you from your own professional liability.
The shield can also fail if the entity isn’t treated as genuinely separate. Commingling business and personal funds, undercapitalizing the entity, ignoring formalities like annual reports and registered agent requirements, or treating company assets as your own can all give a court reason to pierce the veil. Courts typically require both a “unity of interest” between the owner and the entity and evidence that the arrangement produced a fraud or inequitable result. A creditor’s inability to collect, on its own, isn’t enough.
How a PLLC Is Taxed
By default, a PLLC is a pass-through entity. A single-member PLLC is taxed as a sole proprietorship; a multi-member PLLC is taxed as a partnership. The company itself doesn’t pay income tax. Profits flow through to each member’s personal return and are taxed at individual rates, which avoids the double taxation that hits traditional C-Corporations.
The trade-off is self-employment tax. PLLC members who actively work in the business owe self-employment tax of 15.3% on net earnings, which breaks down as 12.4% for Social Security and 2.9% for Medicare.6Internal Revenue Service. Topic No. 554, Self-Employment Tax The Social Security portion applies to earnings up to $184,500 in 2026.7Social Security Administration. Contribution and Benefit Base The Medicare portion has no cap and adds an extra 0.9% on earnings above $200,000 for single filers.
Electing S-Corp Taxation
A PLLC can elect to be taxed as an S-Corporation by filing IRS Form 2553. The election doesn’t change the entity’s legal structure or its liability protection. It only changes how the IRS taxes the income. The filing must happen no more than two months and 15 days after the start of the tax year it takes effect, or any time during the preceding tax year.8Internal Revenue Service. Instructions for Form 2553
S-Corp owners split their income into a reasonable salary (subject to payroll taxes) and distributions of remaining profit (subject to income tax only, with no self-employment tax). For a professional earning well above their reasonable salary, the payroll tax savings on distributions can be meaningful. The strategy generally starts to pay off once net profits consistently exceed about $50,000, though the actual break-even depends on your reasonable salary and total earnings.
To qualify, the PLLC must have no more than 100 shareholders, all US citizens or residents, and only one class of ownership interest.8Internal Revenue Service. Instructions for Form 2553 Most professional practices meet these requirements easily. The added complexity is running payroll for owner-employees and making sure the salary is defensible as “reasonable” for the work performed.
PLLC Compared to a Professional Corporation
If your state offers both, the choice between a PLLC and a Professional Corporation comes down to flexibility and tax defaults. A PC must issue shares, adopt bylaws, elect directors, and hold meetings. A PLLC is governed by its operating agreement, and while good recordkeeping still matters for liability protection, the statutory requirements are lighter.
On taxes, the defaults diverge. A PC defaults to C-Corporation taxation at a flat 21% federal rate, so distributed profits face double taxation unless the PC elects S-Corp status. A PLLC defaults to pass-through treatment, with profits taxed only once on members’ personal returns. Either entity can elect S-Corp status with Form 2553, which evens things out. Without that election, the PLLC’s default is usually more favorable for a small professional practice.
Both entity types require all owners to hold valid professional licenses, and neither shields you from your own malpractice. Protection against ordinary business debts is functionally the same. For most professionals in states that allow it, the PLLC’s simpler management and better default tax treatment make it the more practical choice.