CPA Firm Legal Structure: PLLC, PA, and PC Requirements for Licensed Professionals
Forming a CPA firm is not the same as forming a regular LLC. Every state has specific statutory requirements governing the legal entity type a licensed accounting practice may use, who may own it, and how it must be registered with the state board of accountancy. Getting this wrong — by forming a regular LLC when your state requires a PLLC, or by inadvertently including a non-CPA majority owner — can jeopardize your license and invalidate your firm registration. This guide covers entity selection, state-specific requirements, firm registration procedures, and the ongoing compliance obligations (peer review, AICPA membership) that come with running a licensed accounting firm.
READY TO TAKE ACTION?
Use the free LaunchAdvisor checklist to track every step in this guide.
The Quick Answer
Most licensed CPA firms should form a Professional Limited Liability Company (PLLC) — the licensed professional equivalent of an LLC — because it combines liability protection with pass-through taxation and satisfies the requirements of most state boards of accountancy. In states that don't recognize PLLCs (including California, which uses Professional Corporations or LLPs instead), the correct entity is a Professional Corporation (PC) or Limited Liability Partnership (LLP). As a solo CPA, a PLLC taxed as an S-corporation is typically the optimal structure once your net income exceeds $80,000–$100,000/year, because S-corporation election allows you to pay yourself a reasonable salary and take the remainder as a distribution — potentially saving $8,000–$20,000/year in self-employment taxes. Form your entity through your state's Secretary of State office first, then register the firm with your state board of accountancy — these are two separate filings with separate fees and requirements.
PLLC vs. PA vs. PC: Entity Types for CPA Firms by State
The entity type available to you depends entirely on your state. States that authorize PLLCs for CPA firms include Texas, New York, Florida, Illinois, Georgia, Michigan, Virginia, and most others — these states allow licensed professionals to form PLLCs with the same liability protections as a standard LLC but restricted to licensed practitioners. States that use Professional Associations (PA) instead of PLLC include Texas (both PA and PLLC are recognized for CPAs), Florida (PA is the traditional structure though PLLC is now permitted), and several Southern states. California requires either a Professional Corporation (PC) or a Registered Limited Liability Partnership (RLLP) — California does not recognize PLLCs for CPA practices, making it one of the most complex states to form an accounting firm. New Jersey requires a Professional Corporation or Limited Liability Company with specific licensing language. Before forming any entity, download your state board of accountancy's firm registration packet — every state board publishes this on their website — and read the entity type requirements section verbatim. The AICPA's State Regulation of CPAs page (aicpa-cima.com/resources/landing/state-societies) links to all 55 state and territory boards for quick reference.
State Board Firm Registration: What It Requires and How Long It Takes
Beyond forming your legal entity with the Secretary of State, most states require a separate firm registration with the state board of accountancy before you may practice as a licensed accounting firm. Requirements vary but typically include: (1) Filing a firm registration application with the state board, naming all licensed CPAs with ownership interest; (2) Designating a licensed CPA as the firm's responsible licensee who signs returns and is accountable to the board; (3) Paying a firm registration fee ($50–$300 depending on state); (4) Providing proof of entity formation (PLLC or PC articles of organization); (5) In some states, providing proof of a peer review enrollment within a specified period of starting attest services. Processing times range from two to three weeks in efficient states (Texas, Georgia) to six to eight weeks in slower states (California, New York). Many states issue temporary firm permits while the full registration processes. Start your firm registration application simultaneously with your entity formation — do not wait for the entity certificate before filing the board application, as in most states these can run in parallel. Check whether your state requires the firm registration to be renewed annually (most do) and at what cost.
CPA Firm Ownership Requirements: The Majority CPA Rule
Nearly every state's accountancy act includes an ownership restriction: CPA firms (including PLLCs and PCs) must be majority-owned by licensed CPAs. The specific threshold varies: most states require that CPAs own more than 50% of the firm (majority ownership), while some states require that simple majority of partners or managers be CPAs regardless of ownership percentage. This matters if you plan to bring in a non-CPA business partner. For example, if a CPA wants to partner with a marketing professional or business consultant to launch a firm, the CPA must own more than 50% of the entity under most state rules. Some states go further — Texas requires that a majority of both the ownership and voting rights be held by CPAs. The AICPA Model Rules of Professional Conduct, which most states have adopted in some form, define 'substantial equivalency' standards for multi-state practice, but ownership rules are set by individual states and are not uniformly harmonized. If you're forming a partnership that includes non-licensees, consult with a business attorney licensed in your state who has experience with professional entity formation — this is not a DIY situation.
Peer Review Requirements: What Solo CPA Firms Must Know
If your CPA firm performs attest services — which includes compiled financial statements, reviewed financial statements, and audited financial statements — you are required to enroll in a peer review program. Peer review is a triennial (every three years) evaluation of your quality control system by another licensed CPA firm or qualified review team. Enrollment is mandatory under AICPA membership standards and under state board requirements in most states. The AICPA Peer Review Program (aicpa-cima.com/membership/landing/aicpa-peer-review-program) is the most widely used — you enroll, pay program fees ($200–$500/year depending on practice type), and are matched with a peer reviewer. The review itself evaluates whether your quality control system meets SSARS (Statements on Standards for Accounting and Review Services) or GAAS (Generally Accepted Auditing Standards) requirements. If your solo CPA firm will do only tax preparation, bookkeeping, consulting, and advisory work — and no compiled, reviewed, or audited financial statements — you are typically not required to enroll in peer review. This is a meaningful business decision: limiting your firm to non-attest services eliminates peer review overhead and cost, which can run $1,500–$5,000 for a solo-firm peer review cycle.
AICPA Membership and Voluntary Certifications
AICPA membership ($375–$500/year for CPAs) is voluntary but highly beneficial for a firm owner. Membership provides: access to the MAP survey and benchmarking data, the AICPA Professional Liability Insurance Program (CAMICO, with member pricing), CPE discounts, access to the Peer Review Program as a submitting firm, inclusion in Find a CPA directory (findacpa.org), and access to the PCPS (Private Companies Practice Section) which provides practice management resources specifically for small CPA firms. The AICPA also offers voluntary credentials beyond the CPA license that can differentiate your firm: the Personal Financial Specialist (PFS) credential for CPAs doing financial planning, the Certified in Financial Forensics (CFF) designation for forensic accounting and litigation support, and the Certified Information Technology Professional (CITP) for CPAs specializing in technology advisory. Each credential requires additional CPE and a separate exam, but commands premium billing rates — PFS-credentialed CPAs working in financial planning routinely bill 30–50% above baseline CPA rates for the same client engagement.
Using LegalZoom and CT Corporation to File Your PLLC
Two primary options exist for PLLC formation: DIY through your state's Secretary of State website, or using a registered agent and filing service. Filing directly with your state Secretary of State costs $50–$200 in state fees and is completely manageable — most states have clear online filing portals. LegalZoom (legalzoom.com) charges $99–$299 plus state fees for a PLLC formation package that includes registered agent service for one year, operating agreement template, and EIN filing assistance. Their basic package is adequate for a solo PLLC with no partners. CT Corporation (wolterskluwer.com/en/solutions/ct-corporation) is the enterprise-grade registered agent service used by larger firms and franchise systems — overkill for a solo CPA launch at $300–$500/year for registered agent service alone. For a solo CPA forming a PLLC in one state, LegalZoom provides adequate support at a reasonable price. If you plan to register in multiple states or have complex ownership arrangements, hire a business attorney for $500–$1,500 to ensure your articles, operating agreement, and board filings align with your state's specific professional entity requirements.
RECOMMENDED TOOLS
LegalZoom
PLLC and professional corporation formation service for licensed professionals. Includes registered agent service, operating agreement template, and EIN filing.
CT Corporation
Enterprise registered agent and compliance management service for professional firms operating across multiple states.
Some links above are affiliate links. We may earn a commission if you sign up — at no extra cost to you.
FREQUENTLY ASKED QUESTIONS
Do CPA firms have to be PLLCs, or can they be regular LLCs?
In most states, licensed CPA firms cannot operate as regular LLCs — they must use the professional equivalent (PLLC, PA, or PC) to comply with their state board of accountancy's firm registration requirements. A regular LLC typically cannot be registered as a licensed accounting firm with the state board. Check your state board's specific entity requirements before filing — the acceptable entity types are listed in the firm registration instructions on your state board's website.
What is the difference between a PLLC and a PC for a CPA firm?
Both PLLCs and Professional Corporations (PCs) limit personal liability of the owners to their investment in the firm, provide professional practice authorization, and can elect S-corporation tax treatment. The key differences are governance and formality: PCs require annual meetings, corporate minutes, and more formal corporate governance procedures under state law. PLLCs operate under an operating agreement with fewer formality requirements. For a solo CPA, a PLLC is almost always simpler to maintain. The available entity type depends on your state — not all states offer PLLCs.
Can I add a non-CPA business partner to my CPA firm?
Yes, but with strict ownership limitations. Most states require that CPAs own a majority (more than 50%) of the firm. Some states allow non-CPA ownership up to 49%, while others restrict ownership to CPAs only. Non-CPA partners may hold minority ownership and participate in management, but they cannot sign tax returns, financial statements, or represent clients before the IRS in place of the licensed CPA. Review your specific state board's ownership rules before structuring any partnership agreement.
Is peer review required for a solo CPA firm?
Peer review is required only if your firm performs attest services: compilations, reviews, or audits of financial statements. If your practice is limited to tax preparation, bookkeeping, payroll, and advisory services — with no attest work — peer review is typically not required. This is a meaningful business decision that many solo CPAs make intentionally to reduce administrative burden and compliance cost.
How long does it take to register a CPA firm with the state board?
State board firm registration typically takes two to six weeks after submitting a complete application. Some states (Texas, Florida, Colorado) process applications in two to three weeks; others (California, New York) can take six to eight weeks or longer. Many states issue a conditional or temporary practice authorization while the full registration processes. Begin your state board registration simultaneously with your entity formation — do not wait for your LLC certificate before applying.