Should Your Practice Elect S-Corporation Status? A Physician's Decision Framework

The election is a payroll-tax decision before it is anything else. Two income scenarios show where the line actually falls, and why $100,000 and $200,000 of practice income lead to opposite answers.

Almost every physician who steps into independent practice, whether through a professional corporation, locum work or a consulting side practice, eventually hears the same advice: "You should be an S-corp." It's offered confidently, usually without a number attached, and it's right often enough to be dangerous.

The S-corporation election isn't a status symbol and it isn't free. It's a trade. You accept the cost and rigidity of running payroll, filing a separate return and defending a compensation figure to the IRS, in exchange for shielding part of your practice income from self-employment tax. Whether that trade favors you depends almost entirely on how much profit sits above a reasonable salary.

Key points

• An S-corporation saves payroll tax only on profit taken as distributions above a reasonable salary.

• Physician salaries benchmark high, so the distribution wedge is often smaller than the "everyone should be an S-corp" advice assumes.

• At $100,000 of practice profit, the saving is about $3,400 before costs, often too thin to justify the structure.

• At $200,000, it's about $8,300 before costs, and usually worth it.

• In California, clinical practice runs through a professional medical corporation, and the S-corporation pays a 1.5% franchise tax (minimum $800).

The mechanism: what the election actually does

A physician operating as a sole proprietor pays self-employment tax on 92.35% of the practice's net profit. That tax is 15.3%: 12.4% for Social Security and 2.9% for Medicare, with the Social Security portion stopping at the wage base and an extra 0.9% Medicare tax at higher incomes.

An S-corporation splits the same profit into two streams. You become a W-2 employee of your own corporation and pay yourself a reasonable salary, which carries full payroll tax. Whatever profit remains after that salary is taken as a distribution, which isn't subject to Social Security or Medicare tax. That untaxed distribution wedge is the entire source of the savings.

For 2026, the Social Security wage base is $184,500. Below it, each dollar moved from salary to distribution saves the full 15.3%. Above it, only the Medicare portion remains, so the saving drops to about 2.9% to 3.8%.

That single fact reshapes the analysis for high earners. A physician with $600,000 of profit doesn't save 15.3% on the distribution above salary. They save roughly 3%, because Social Security tax already stopped at the wage base. The savings are real, but they're Medicare-rate savings, not the headline number.

The reasonable compensation constraint

The distribution wedge can't be made arbitrarily large. The IRS requires S-corporation owner-employees to pay themselves reasonable compensation for the services they actually perform before taking distributions. For a physician, "reasonable" is anchored to what the market pays a doctor in that specialty and region, and physician salaries are high, well documented and easy for an examiner to benchmark.

That's why the S-corporation math is less generous for physicians than for, say, a software consultant. A consultant might defensibly draw a $90,000 salary against $300,000 of profit. A cardiologist can't: a reasonable salary might be $350,000 or more, which can absorb most or all of the profit. The higher your defensible salary, the smaller the wedge, and the weaker the case.

A note on the QBI deduction

Medicine is a "specified service trade or business" under Section 199A. For 2026, the deduction fully phases out once taxable income exceeds $553,500 (married filing jointly) or $276,750 (single). Most established physicians are above these thresholds and receive no QBI deduction regardless of entity choice, so QBI isn't a reason to elect. For early-career physicians under the threshold, an S-corporation salary changes the deduction, and the interaction is worth modeling directly.

Two scenarios

The figures below are simplified: they compare payroll and self-employment tax only, use round salary assumptions to show the mechanism, and leave aside the income-tax deduction for half of self-employment tax. A live engagement would benchmark compensation to specialty and regional data.

Scenario A: likely not worth it

$100,000 of net practice income. This might be a physician with part-time locum work, telehealth or expert-witness consulting alongside a hospital W-2. Suppose a defensible salary is $70,000.

Sole proprietor	S-corporation
Profit subject to payroll or self-employment tax	$92,350	$70,000 salary
Payroll or self-employment tax	About $14,130	About $10,710
Saving before costs	About $3,400
California franchise tax (1.5%, minimum $800)	None	$800

Once the costs of the structure are netted against it (a separate 1120-S return, payroll processing, bookkeeping, the $800 California minimum and the documentation the structure demands), the net benefit is thin. It's also fragile: a reasonable-compensation challenge that pushes the salary higher can erase it.

My typical guidance at this level: stay a sole proprietor until the practice income grows. The election can be made later, and there's little cost to waiting.

Scenario B: generally worth it

$200,000 of net practice income from an established solo or small-group arrangement. Suppose a defensible salary is $130,000.

Sole proprietor	S-corporation
Profit subject to payroll or self-employment tax	$184,700	$130,000 salary
Payroll or self-employment tax	About $28,230	About $19,890
Saving before costs	About $8,300
California franchise tax (1.5%, minimum $800)	None	About $1,050

Here the salary sits below the Social Security wage base, so most of the distribution escapes the full 15.3%. After the return, payroll administration, California's franchise tax and documentation, a clear four-figure benefit remains, and it recurs every year the practice sustains this level of profit. The structure is also more defensible: the salary and distribution both look proportionate.

My typical guidance at this level: elect S-corporation treatment, pair it with an accountable plan and a properly designed retirement structure, and document the compensation basis contemporaneously.

The election usually becomes worth its cost once practice profit is reliably above roughly $150,000 and leaves a meaningful amount above a defensible salary. Below that, the costs and audit exposure tend to swallow the benefit. It's a starting point for the conversation, not a formula.

The considerations beyond the payroll-tax math

Retirement plan design. In an S-corporation, retirement contributions are based on your W-2 salary only; distributions don't count. A low salary saves payroll tax but can shrink what you're allowed to contribute to a solo 401(k) or a cash balance plan. Sometimes the right salary is higher than the minimum precisely to support the retirement plan, and the two have to be set together.

California's professional-entity rules. Physicians in California generally can't practice medicine through an ordinary LLC. Clinical practice runs through a professional medical corporation, and the S-election sits on top of it. Entity choice and tax election are separate decisions, and the professional-licensing layer has to be right first. Non-clinical work, such as some consulting, may be structured differently.

Reasonable-compensation exposure. An aggressive salary is the most common way an S-corporation invites an IRS adjustment. A structure that only works if you underpay yourself isn't a structure; it's a deferred assessment.

Administrative cost and discipline. The election commits you to running payroll on a schedule, filing a separate return, maintaining an accountable plan for reimbursements and keeping cleaner books. The saving has to clear this hurdle, not just exist.

PTET and multi-state practice. California's elective pass-through entity tax can move state tax off your personal return, outside the SALT cap. Practicing across state lines adds sourcing and apportionment questions. Both are worth modeling before the election, not after.

The engineer and the chess player

The payroll-tax calculation is engineering: the wage base, the 92.35% factor, the franchise tax, the reasonable-compensation benchmark. The decision is chess. The salary you set affects your retirement contributions, your QBI position, your SALT deduction through PTET and your audit exposure, and the right answer can change as the practice grows. An election made on a rule of thumb fixes one variable and ignores the rest of the board.

The bottom line

For a physician, the S-corporation election lives or dies on the gap between total practice profit and a defensible salary, and because physician salaries benchmark high, that gap is often smaller than the conventional advice assumes. The answer is a number, not a default, and it's worth running before the election, not after.

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Discuss your situation with Natalie C. Papagni, CPA

If your independent practice income is approaching or past the level where this question becomes live, modeling the actual figures (a defensible salary, the payroll-tax saving against the full cost, and the California and retirement-plan interactions) is the natural first step. A complimentary 30-minute consultation is a good place to start.

Natalie C. Papagni, CPA — Tax, Planning & Advisory Services 4275 Executive Square, Suite 200, La Jolla, CA 92037 (858) 754-8277 | service@lajollataxcpa.com | lajollataxcpa.com

Disclaimer: This material is provided for general educational purposes only. It is not tax, legal or accounting advice, and it does not create a CPA–client relationship. Tax outcomes depend on individual facts and circumstances, and figures and rules change from year to year. Consult a qualified professional about your specific situation before acting. Figures reflect 2026 federal and California rules, including the $184,500 Social Security wage base; scenarios are simplified and illustrative.