How a dental practice is structured affects payroll taxes, retirement contributions, liability and eventual transition. Common options include sole proprietorships, partnerships, LLCs taxed as S corporations and professional corporations. The right choice depends on the dentist's facts, state law and tax law, so there is no universal answer.
Why does the entity choice matter so much for dentists?
The structure decides how practice income is taxed, whether it is subject to self-employment tax, how it flows to owners and how it supports retirement contributions. It also shapes the eventual sale: the buyer's structure and the seller's structure have to meet somewhere.
Because a dentist's income is largely service income, the structure questions that matter for most small businesses matter for dentistry with extra weight.
What are the common structures?
A solo dentist may operate as a sole proprietorship, a single-member LLC or a professional corporation electing S corporation status, with S corporation treatment potentially reducing self-employment tax on the portion of income treated as distributions rather than salary, subject to reasonable compensation standards.
Partnerships and multi-owner LLCs carry their own mechanics, and state professional corporation rules vary. Each structure has to be analyzed against the practice's actual income, ownership and plans.
What is reasonable compensation, and why does it matter?
An S corporation owner who works in the practice must be paid reasonable compensation for services, and the compensation level is a facts-and-circumstances question that the IRS can examine. Pay too little and the structure invites scrutiny; structure the whole picture poorly and the tax savings disappear.
The compensation decision interacts with retirement contributions, benefits and the qualified business income deduction, so it belongs in a coordinated plan rather than a standalone number.
When should a dentist revisit the structure?
New partnerships, new locations, buying or selling a practice, buying practice real estate, adding associates and approaching retirement all change the structure's right answer. A structure that was right at founding is rarely right for the whole career.
The review is annual at minimum and event-driven on top of that, which is what keeps the structure matched to the practice.
Key takeaways
- Structure determines how income is taxed, not just where it is reported.
- S corporation treatment can reduce self-employment tax, subject to reasonable compensation rules.
- Structure should be reviewed annually and at every practice milestone.
Educational information only. This article is not personalized tax, legal or financial advice. Tax results depend on individual facts and applicable law, which can change. Discuss your situation with a qualified advisor.
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