Every business forms an entity the same way; what differs by industry is everything around the filing: which entity variant the regulators accept, which licenses gate the first dollar, which insurance the entity cannot replace, and how the tax posture leans. This guide covers those layers for law, accounting, architecture, engineering, and other licensed firms. The universal mechanics (name, agent, filing, EIN, bank account) are in the step-by-step formation guide with fees for every state.
The Entity Choice
Licensed professions sit under the professional-entity overlay: many states require the PLLC or professional corporation variant, restrict ownership to licensees, and route the entity name past the licensing board. The shield covers the firm's commercial life (lease, staff, vendors, a partner's malpractice) but never your own professional errors: that is what malpractice coverage answers.
The License Layer
Two license layers run in parallel: each professional's individual license, and in many states a firm-level registration or certificate of authorization (engineering and architecture especially). Multi-state practice multiplies the firm-level layer state by state. Map your specific stack with the license lookup before committing to opening dates.
Risk and Insurance: What the LLC Does Not Cover
Malpractice/professional liability insurance is the defining instrument, often at limits clients or regulators set. Partnership agreements (the operating agreement's professional cousin) carry the industry's real risk allocation: buy-ins, departures, and who owns the clients. The general principle, that the entity is one wall in a system that includes insurance and clean separation, is developed in What Is an LLC?
The Tax Posture
Personal-service income at professional rates makes the S-corp election (where the entity form allows it) the standard optimization, with reasonable-salary scrutiny at professional pay levels. Multi-state firms apportion income where the work happens. The mechanics behind all of it (pass-through default, quarterly estimates, the S-corp election) are in the LLC tax guide, with the books that support them in the bookkeeping system.
The First 90 Days, in Order
The sequence matters more than the speed. The items below are ordered by what gates what; the long-lead items start first even when later steps feel more urgent.
The Two Mistakes This Industry Actually Makes
Why it hurtsBuy-ins, departures, and client ownership without written terms end firms.
PreventionThe partnership agreement comes before the first shared client.
Why it hurtsIndividual licenses do not cover the entity where firm-level registration is required.
PreventionCheck the board's firm-registration rules at formation.
Standard entity, industry-shaped everything else
Form the entity the standard way, then respect the layers your industry adds: the right variant, the licenses that gate revenue, the insurance the LLC cannot replace, and the tax posture of the work. The businesses that struggle skipped a layer, not the filing.
Frequently asked questions
What entity should a firm use?
Licensed professions sit under the professional-entity overlay: many states require the PLLC or professional corporation variant, restrict ownership to licensees, and route the entity name past the licensing board. The shield covers the firm's commercial life (lease, staff, vendors, a partner's malpractice) but never y The national mechanics are in the formation guide.
PLLC vs LLC: which does my firm need?
Whichever your state's licensing statute says: many states require licensed professions to use the professional variant with licensee-only ownership, while others allow standard LLCs. The licensing board's entity rules, not preference, decide; filing the wrong form bounces at the board.
What licenses come after formation?
Two license layers run in parallel: each professional's individual license, and in many states a firm-level registration or certificate of authorization (engineering and architecture especially). Multi-state practice multiplies the firm-level layer state by state.
What insurance does the entity not replace?
Malpractice/professional liability insurance is the defining instrument, often at limits clients or regulators set. Partnership agreements (the operating agreement's professional cousin) carry the industry's real risk allocation: buy-ins, departures, and who owns the clients.
How are profits taxed?
Personal-service income at professional rates makes the S-corp election (where the entity form allows it) the standard optimization, with reasonable-salary scrutiny at professional pay levels. Multi-state firms apportion income where the work happens. Full picture: the LLC tax guide.
Form the entity, then build the layers.
Formation with the state fee at cost, operating agreement, EIN, and compliance monitoring for the recurring obligations your industry adds.
