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Should Physicians form an S-Corporation?
May 1
5 min read
Updated: Aug 15
An S-election can save a physician thousands a year - or add cost and complexity for no benefit. The difference comes down to how you're paid, how much your paid, and whether you're ready for the compliance that follows.
The S-corporation is the most over-recommended and under-explained structure in physician tax planning. It gets pitched at conferences and in online forums as a near-universal answer, but for a large share of physicians it delivers little and costs real money. The honest version of this conversation starts with a single question: how are you actually paid?
If your entire income arrives on a W-2 from a hospital or group, an S-corporation does nothing for that income. Your employer withholds payroll taxes, issues the W-2, and there is no self-employment tax for an S-corp to reduce. The election only becomes compelling once you have income flowing to you as a sole proprietor - locum tenens income, independent contracting, moonlighting billed under your own name, or medical directorships paid on a 1099.
What an S-Corp Election Actually Changes
When you elect S-corporation status, your practice is required to pay you a reasonable salary, and the remaining profit passes through to you as a distribution. Payroll taxes apply to the salary. They do not apply to the distribution. That gap - the payroll tax you avoid on the distribution portion - is the primary reason many physicians and healthcare professionals elect to be taxed as an S-corporation.
A sole proprietor pays self-employment tax — the combined employer and employee share of Social Security and Medicare — on essentially all net business profit. The Social Security portion applies up to an annual wage base and the Medicare portion applies without limit, plus an Additional Medicare surtax at higher incomes. When you elect S-corporation status, your practice pays you a salary through payroll, and the remaining profit passes through to you as a distribution. Payroll taxes apply to the salary. They do not apply to the distribution. That gap — the payroll tax you avoid on the distribution portion — is the entire tax case for an S-corp.
The Trade Off
You accept the cost and rigor of running a corporation in exchange for removing payroll tax from the distribution portion of your profit — which only helps if there's meaningful profit left after paying yourself a defensible salary.
Why the Salary Caps Your Savings
The savings are not unlimited, because the IRS requires an S-corporation owner who works in the business to pay themselves reasonable compensation — a salary consistent with what the role would command in the open market. For a physician, that figure is high. A market-rate physician salary already absorbs most or all of the profit in many practices, leaving a thin distribution to shelter.
This is the piece the conference pitch leaves out. If a physician nets $300,000 and a defensible salary for that specialty and hours is $270,000, only $30,000 of distribution escapes payroll tax — and because that amount sits above the Social Security wage base, the savings are limited to the Medicare rate on it. The math works far better for a physician netting $600,000 whose reasonable salary is $300,000, leaving a substantial distribution.
What You Take On
An S-corporation is not a set-and-forget structure. Electing it commits you to a set of recurring obligations that carry real dollar and time costs:
● Payroll processing — you must run formal payroll, remit withholding, and file quarterly and annual payroll returns, typically through a payroll service.
● A separate corporate tax return — Form 1120-S each year, plus the California Form 100S and the state's franchise tax and 1.5% entity-level tax.
● Bookkeeping discipline — clean books, a dedicated business account, and separation of personal and business funds.
● Reasonable compensation documentation — a defensible basis for the salary you chose, not a number picked to minimize tax.
In California specifically, the state imposes a 1.5% tax on S-corporation net income (with an annual minimum), which erodes part of the federal payroll tax savings. This is why an S-election that looks attractive on paper nationally can be a closer call for a California physician — the state takes back a slice of what the federal structure saves.
When the Election Makes Sense for Most Physicians
There is no single magic number, because the answer depends on your specialty's market salary, your net profit, your state, and your appetite for administration. But a useful rule of thumb: the election tends to become worth serious consideration once your 1099 or practice net profit clears roughly $150,000 to $200,000 above a defensible salary, or when total net profit reaches a level where the distribution left after a market salary is large enough to make the payroll tax savings outrun the compliance cost.
KEY TAKEAWAYS
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