Should a pediatrician in private practice use an S corporation?

Sometimes, and only after the entity question underneath it is answered, because an S corporation is not a kind of practice entity at all. An S corporation is a federal tax election that sits on top of a legal entity, so the correct sequence is to form the professional entity your state requires for medical practice first, and only then decide how that entity should be taxed, and the election earns its keep only when the self employment tax it avoids, at the Internal Revenue Service rate of 15.3 percent, exceeds the payroll, accounting, and compliance costs it creates. For a small pediatrics practice with modest profit after a fair salary, the answer is often not yet. For a profitable practice with real margin above that salary, the same election can return thousands a year. The math, not the fashion, decides.

Part of the pediatrics hub.

Entity before election

Two different decisions are stacked inside this question, and collapsing them is where practices go wrong. The first decision is legal: what entity holds the practice. Medicine is a licensed profession, and most states require a professional entity for medical practice, an entity formed under the state's professional practice rules by licensed clinicians. California bars LLCs from professional medical services outright, so a California pediatrician does not get to choose an ordinary LLC for the practice at all. Your malpractice coverage, your payer contracts, your licenses, and your liability posture all attach to this legal entity, and none of them is a tax question.

The second decision is tax only: how the entity you formed is taxed by default, or whether it elects S corporation treatment so that its income, losses, deductions, and credits pass through to the owners' personal returns (Internal Revenue Service). The election changes the tax route. It does not change the entity, the contracts, or the clinical obligations. Form the right professional entity for your state first, with counsel who knows professional practice law in that state, and then run the election as a separate, reversible in spirit but paperwork heavy decision on top of it. The pediatrics ownership guide places this choice among the wider ownership decisions a new attending faces.

The tax math that decides it

A pediatrician practicing as a sole proprietor, or through an entity taxed that way, pays self employment tax at 15.3 percent on net earnings from the practice (Internal Revenue Service). The illustration shows the scale. On $150,000 of practice profit, a simple multiplication at 15.3 percent gives $22,950. Your actual return will differ from that illustration, because the real computation applies the rate to net earnings with its own adjustments, but the scale is the point: the tax runs on essentially the whole profit.

Under an S corporation election, the structure splits. The practice pays you a salary for the work you actually perform, and that salary runs through payroll, carrying payroll taxes in the ordinary employee and employer pattern. Profit above the salary can be distributed to you as an owner, and distributions are not self employment income. On the same illustration, if $50,000 of what would have been fully exposed profit instead reaches you as a distribution, the simple multiplication, 15.3 percent of $50,000, puts the gross saving at $7,650 a year before costs. Against that saving, charge everything the election adds: payroll processing, a separate corporate return, state franchise or entity taxes where they apply, and the accounting time to keep the two clean.

One guardrail governs the whole structure, and it is not optional. The salary must be reasonable compensation for the pediatrician the practice employs, meaning a defensible pay level for full time clinical work in your market, not a token figure chosen to maximize distributions. An artificially small salary is the fact pattern the Internal Revenue Service challenges, and a successful challenge reclassifies distributions as wages and unwinds the saving with penalties attached. At pediatrics compensation levels, where average pay is $266,000 (Medscape Physician Compensation Report 2026), a working owner physician's reasonable salary will consume much of a small practice's profit, which is exactly why the election so often fails to pay at small scale and succeeds at larger scale.

Retirement plans and the decision rule

The election also reaches your retirement plan, and this effect belongs in the comparison. A solo 401(k) for the practice, with no full time staff, can accept total annual additions of up to $72,000 for 2026 (Internal Revenue Service). Inside that total, your employee deferral is capped at $24,500, which leaves up to $47,500 of room for the employer side contribution by simple subtraction, $72,000 minus $24,500. Under an S corporation, that employer contribution is calculated from the salary the corporation pays you, because you are its employee. A salary set low to chase payroll tax savings also shrinks the base your retirement contributions are built on. The election can therefore buy a tax saving in one line of the return while selling retirement space in another, and the two effects must be priced together.

The decision rule is mechanical. Have your accountant run the same practice year both ways, as a sole proprietor or default taxed entity and as an S corporation, with a reasonable salary in the second version, full costs in both, and the retirement contribution you actually intend to make in each. Elect S status in the year the second version wins by a margin that survives conservative assumptions, and revisit the comparison as profit grows. Until that year, the professional entity with default taxation, clean books, and a maxed solo 401(k) is not a fallback. It is the right structure at that scale.

Follow up questions

Can an LLC elect S corporation tax treatment?

In general, an eligible entity can elect S corporation treatment for federal tax purposes, because the election concerns taxation rather than legal form. For a medical practice, though, the entity question comes first, and the entity must be one your state permits for professional medical services. California bars LLCs from professional medical services outright, so the election cannot rescue an entity the state does not allow to practice medicine.

How much salary is reasonable for a pediatrician owner?

There is no fixed number in the rules, and any source that offers your practice a percentage as a safe answer is guessing. Reasonable means defensible pay for the clinical and management work you actually do, supported by what employed pediatricians earn for comparable work. Average pediatrics compensation of $266,000 (Medscape) is the kind of market evidence your accountant will weigh, and the file should show the reasoning before the return is filed, not after a notice arrives.

Does the S election change my malpractice coverage or payer contracts?

No. The election changes how the entity is taxed, and nothing else. Your professional entity, its malpractice arrangements, and its payer contracts are exactly what they were the day before the election. That is the practical proof of the principle this page runs on: entity first, election second, and never expect a tax form to do a legal document's work.

Related questions

• Private pediatrics practice partnership or hospital employed?
• Is a pediatrics practice buy in worth it with falling reimbursement?
• What order should a pediatrician fund retirement accounts in?

Sources

Internal Revenue Service, Self employment tax (Social Security and Medicare taxes) (the self employment tax rate of 15.3 percent, accessed October 2026)

Internal Revenue Service, S corporations (S corporations elect to pass corporate income, losses, deductions, and credits through to their shareholders for federal tax purposes, accessed October 2026)

Internal Revenue Service, Notice 2025-67 (the 2026 total annual additions limit of $72,000 and the elective deferral limit of $24,500 used in the solo 401(k) arithmetic, accessed October 2026)

Medscape Physician Compensation Report 2026 (average pediatrics compensation of $266,000, accessed October 2026)

Takeaways

• An S corporation is a tax election on top of a legal entity, never a substitute for one. Entity first, election second.
• Most states require a professional entity for medical practice, and California bars LLCs from professional medical services outright.
• The saving is the 15.3 percent self employment tax avoided on distributions. On $50,000 shifted, the simple illustration is $7,650 a year before costs.
• The salary must be reasonable for the work you perform. A token salary is the fact pattern that unwinds the whole structure.
• Decide on a side by side tax comparison that prices payroll, compliance, and retirement contribution room together, and elect in the year it wins clearly.