How a Firm Is Organized Determines How Liability Is Shared and How Profits Are Taxed
When architects go into practice - whether starting fresh out of school or breaking away from an established firm - one of the first decisions is what legal entity the firm will be. This is not just an administrative formality. The entity type determines how professional liability flows through the organization (whether personal assets are at risk), how income is taxed (pass-through vs. entity-level taxation), how ownership can be transferred, and how the firm presents itself to clients and in professional settings. The ARE PcM exam tests firm organization because practice management includes understanding the basic legal and financial structures within which architectural services are delivered.
Sole Proprietorship
A sole proprietorship is the simplest business structure - the firm and the individual owner are legally the same person. There is no separate entity to form; the owner simply conducts business under their own name (or a trade name registered with the appropriate state authority). Sole proprietorships are easy to form and have no separate tax filing requirements - business income and losses flow directly through to the owner's personal tax return. The critical disadvantage is unlimited personal liability: the owner is personally liable for all business obligations, including professional liability claims. A judgment against the sole proprietorship is a judgment against the individual architect personally, putting personal assets (home, savings, personal property) at risk.
Partnerships
A general partnership is formed when two or more individuals carry on a business together with the intent to make a profit. Like sole proprietorships, general partnerships offer pass-through taxation (profits and losses flow to partners' personal returns), but each general partner is jointly and severally liable for the acts and obligations of all other general partners. This unlimited mutual liability makes general partnerships risky for architectural practice. Limited liability partnerships (LLPs) are the evolution: in an LLP, a partner is not personally liable for the negligence or misconduct of other partners (though they remain liable for their own acts). LLPs are common for professional firms in states that recognize them.
Limited Liability Company (LLC)
The LLC is the most popular entity structure for modern architectural firms. An LLC provides personal liability protection for its members (owners) - member assets are generally protected from business liabilities - while offering the pass-through taxation of a partnership (avoiding the double taxation of a C corporation). LLCs are flexible in management structure (can be member-managed or manager-managed) and have fewer administrative requirements than corporations. The operating agreement governs how the LLC functions, how profits are distributed, and how ownership changes are handled. Note that liability protection does not extend to a member's own professional negligence - an architect cannot hide behind an LLC if they personally commit malpractice.
Corporation (PC / APC)
Most states require architectural firms organized as corporations to use a Professional Corporation (PC) or Architectural Professional Corporation (APC) rather than a standard business corporation. PCs provide limited liability to shareholders (similar to an LLC) but require all shareholders to be licensed architects in most states. Regular C-corporations face double taxation (profits taxed at the corporate level, then again when distributed as dividends), while S-corporations elect pass-through taxation. PCs typically elect S-corporation status for tax purposes. Corporations have more governance requirements (board of directors, annual meetings, formal records) than LLCs.
Key Exam Points
- Sole proprietorship: simplest form; unlimited personal liability; no tax entity separation.
- General partnership: pass-through taxation; joint and several liability among partners.
- LLP: limited liability for other partners' negligence; popular for professional firms.
- LLC: limited personal liability; pass-through taxation; flexible management; most common modern structure.
- Professional Corporation (PC): corporation for licensed professionals; limited liability; shareholders must be licensed architects in most states.
- None of these protect architects from personal liability for their own professional negligence.
Study PcM on AREprep
AREprep’s PcM flashcards cover every concept on this exam with spaced repetition, and the practice exams mirror the real question formats so the actual test feels familiar.