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The Overview
An S-Corp election lets self employed physicians convert a portion of their practice income from FICA taxed wages to FICA free distributions.
It is the single most direct entity level move a 1099 physician can make, and the FICA math scales with income. This guide walks through the mechanics at $200K, $400K, and $600K of practice income.
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This guide covers when S-Corp election makes sense, how to set reasonable compensation by specialty, FICA math at three income levels, state considerations, and the compliance required to keep the election intact.
In This Guide
The Basics
What Is an S-Corp Election for a Physician?
An S-Corp election is a federal tax classification, not a legal entity. You do not "form an S-Corp." You form a legal entity (almost always an LLC, PLLC, or PC depending on your state) and then file Form 2553 with the IRS to elect S-Corporation tax treatment for that entity. The legal entity stays the same; what changes is how the IRS taxes the profits.
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Without S-Corp election, every dollar of your net practice income flows through to your personal return as self employment income subject to federal and state income tax, the 15.3% self employment tax (12.4% Social Security up to the annual wage base plus 2.9% Medicare with no cap), and the 0.9% additional Medicare tax above certain thresholds.
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With S-Corp election, your practice income splits in two: a W-2 salary you pay yourself (called reasonable compensation) and business income. The salary is subject to FICA. The business income is subject to income tax only, with no FICA or self employment tax. For more on entity selection and how S-Corp election fits with it, see our physician entity formation guide.
How It Works
How S-Corp Tax Savings Work
How much you save depends on three factors: net income above your reasonable salary (more business income dollars escape FICA), how the salary is set (too low invites IRS scrutiny, too high eliminates the savings), and whether you have other W-2 income.
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The W-2 income piece matters more than most physicians realize. If your W-2 attending wages already exceed the Social Security wage base, the 12.4% Social Security tax is already capped, and S-Corp savings come almost entirely from avoiding the 2.9% Medicare tax (and 0.9% additional Medicare where applicable) on the distribution. For a 1099 physician with no W-2 attending job, S-Corp election captures the full federal FICA savings.
Is It Time?
When S-Corp Election Makes Sense
S-Corp election is not free. You have to run payroll, file Form 1120-S, file a state corporate or franchise return in most states, document reasonable compensation, and absorb the administrative cost of all of it. Our general rule at Doc Wealth: S-Corp election starts to make sense when net self employment income exceeds approximately $80,000 to $100,000, and it almost always makes sense above $150,000.
S-Corp typically makes sense when:
You have $100,000 or more in net 1099 or practice income
That income is reasonably stable
You are willing to keep up with payroll and the additional return
You are in a state where entity level taxes do not eat the savings
S-Corp may not make sense when:
Your net 1099 income is under approximately $80,000
Your income is uncertain (early in a 1099 transition, or you may return to W-2)
You have a W-2 attending job and your 1099 work is under approximately $50,000
The Critical Variable
Why Reasonable Compensation Matters
The IRS allows S-Corp owners to take distributions free of FICA, but only after paying themselves a reasonable salary first. Set the salary too low and you invite an exam, back payroll taxes, and penalties. Set it too high and you lose the savings.
How the IRS Defines Reasonable Compensation
The IRS does not publish a salary table. It uses a multi-factor test weighing training, duties, time and effort, comparable compensation, and compensation history. For physicians, the dominant factor is comparable compensation: what would a hospital, group, or staffing agency pay an employed physician with the same specialty, experience, geography, and hours to perform the same clinical work?
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That benchmark anchors reasonable comp. Common sources include MGMA Provider Compensation data, Medscape, BLS, AMGA, and Doximity. A defensible analysis pulls from multiple sources and documents the methodology in writing.
Specialty Benchmarks: EM, Anesthesia, Radiology, Surgery
A few patterns we see across our physician clients:
Emergency medicine
Hourly rate benchmarks make EM one of the more straightforward specialties to defend. Document the hours and apply a market hourly rate from MGMA or staffing data.
Anesthesia
Reasonable comp tracks with case volume and ASA units. Anesthesia 1099 income often runs high enough that even an upper-market salary leaves a substantial distribution.
Radiology (especially teleradiology)
Higher net 1099 income is common. RVU-based benchmarks support setting reasonable comp at the upper market rate while still preserving meaningful distribution.
Surgery (general and subspecialty)
Highest market salaries, which means reasonable comp is also high. The election still works because surgeon 1099 income often runs well above even the top reasonable comp benchmark.
The right number is not the lowest you can defend. It is the number a reasonable third party would pay for your work. That is the standard the IRS applies, and the standard our tax team applies for physician clients.
The Numbers
Real Numbers: FICA Math
The examples below assume the physician has no other W-2 income that has met the Social Security wage base. Actual results depend on the wage base for the year, state taxes, the specific reasonable salary, and other facts.
Example 1
$200,000
Net practice income
W-2 salary
$130,000
Distribution
$70,000
Approx. annual FICA savings
$6,000 – $10,000
Without S-Corp election, the full $200,000 is subject to self employment tax, producing roughly $25,000 to $28,000 depending on the wage base for the year. With S-Corp election and an illustrative reasonable salary of $130,000, FICA applies only to the $130,000 W-2 salary. The remaining $70,000 distribution is not subject to FICA or SE tax. Approximate annual FICA savings range from roughly $6,000 to $10,000.
Example 2
$400,000
Net practice income
W-2 salary
$250,000
Distribution
$150,000
Approx. annual FICA savings
$10,000 – $20,000+
Without S-Corp election, the full $400,000 is exposed to SE tax. The Social Security portion caps at the wage base, but the 2.9% Medicare tax applies to the entire $400,000, plus 0.9% additional Medicare on income above $200,000 (single) or $250,000 (MFJ). With S-Corp election and an illustrative reasonable salary of $250,000, FICA applies to $250,000 and the $150,000 distribution is shielded. Approximate annual FICA savings range from roughly $10,000 to $20,000+.
Example 3
$600,000
Net practice income
W-2 salary
$325,000
Distribution
$275,000
Approx. annual FICA savings
$15,000 – $30,000+
Without S-Corp election, the full $600,000 is exposed to the 2.9% Medicare tax and 0.9% additional Medicare on amounts above the threshold. The Medicare exposure alone is substantial. With S-Corp election and an illustrative reasonable salary of $325,000, FICA applies to $325,000 and the $275,000 distribution is shielded. Approximate annual FICA savings on this scenario commonly run in the $15,000 to $30,000+ range.
These ranges are illustrative. Actual numbers depend on specialty, geography, the wage base for the year, additional Medicare exposure, state taxes, and how the reasonable salary is benchmarked.
Ready to See What Your Numbers Look Like?
The gap between the right reasonable salary and the wrong one can be the entire benefit of the election. Our tax team runs the analysis as part of the intro process. No long term contracts. Prompt, dependable communication. Your first call is free.
Location Matters
State Specific Considerations
Federal S-Corp math is half of the picture. State level rules can compress the savings or eliminate them. Three states come up most often.
California
California assesses an $800 minimum franchise tax on every LLC and corporation regardless of income, plus a 1.5% state level S-Corp tax on net income. That 1.5% reduces but does not eliminate the federal savings.
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California also does not allow physicians to provide medical services through an LLC. Physicians must use a Professional Corporation (PC) for clinical practice, which can elect S-Corp tax treatment. Non-clinical work (consulting, expert witness, real estate) may be operated through an LLC.
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For California physicians at or above approximately $200,000 in net practice income, S-Corp election still produces meaningful savings net of state cost, and triggers eligibility for the California PTET, which can recover federal tax beyond the $10,000 SALT cap. See our physician PTET guide.
New York City
NYC imposes an Unincorporated Business Tax (UBT) of approximately 4% on unincorporated businesses. S-Corp election generally avoids UBT exposure, often making this an additional reason to elect S-Corp on top of the federal FICA savings. New York physicians must use a PLLC or PC for medical practice.
Texas
Texas has no state income tax. The state level cost is the Texas margin (franchise) tax, which only applies to entities with revenue above approximately $2.47 million (a threshold adjusted periodically). Most physician practices fall below this threshold and owe only an information only "no tax due" return. Texas physicians typically capture the full federal FICA savings without a meaningful state level offset.
For physicians practicing across multiple states (locum tenens, traveling cases, telehealth in non-resident states), the analysis gets more complex. See our multi-state tax guide.
Keeping It Intact
S-Corp Compliance Requirements
The savings only hold if compliance is done correctly. Physicians who lose their S-Corp benefit lose it for one of these reasons.
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Form 2553 election. The S-Corp election is made by filing Form 2553 with the IRS. For an entity to be taxed as an S-Corp from the start of the tax year, the form is generally due by March 15. Late elections are possible in specific circumstances, but the safe path is on time filing.
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Form 1120-S, the S-Corp tax return. This federal information return reports income, expenses, salary paid to the owner, and distributions, and generates a Schedule K-1 that flows the income to the physician's Form 1040. Form 1120-S is due March 15, with a six-month extension available.
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Payroll. The physician must be paid as a W-2 employee: W-4, withholding, FICA matching, state withholding, quarterly Form 941, an annual Form 940, state unemployment, and W-2 issuance. This is the part most physicians underestimate. We handle it directly through our physician payroll service.
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Reasonable compensation documentation. A defensible position requires written documentation supporting the salary. Reference benchmark sources, specify the methodology, and preserve the documentation with the tax records.
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Estimated tax payments. The S-Corp owner is still responsible for personal estimated tax payments on the K-1 income. For the deeper mechanics, see our physician estimated taxes guide.
What to Avoid
The S-Corp Steps Most Physicians Skip
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Setting reasonable compensation too low.
Online articles sometimes suggest a 60/40 or 70/30 salary to distribution split. The IRS does not care about a percentage. It cares about market comparable comp for your specialty, geography, hours, and duties.
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Skipping payroll altogether.
Some physicians elect S-Corp treatment and pay themselves only through distributions. That is a textbook IRS audit issue.
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Missing the Form 2553 deadline.
Late elections can sometimes be cured under IRS late election relief, but missing the deadline usually costs at least a year of S-Corp treatment.
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Forgetting state level filings.
Many states require their own S-Corp filings, franchise reports, or biennial statements separate from the federal 1120-S. Missing these produces penalties or involuntary entity dissolution.
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Mixing personal and business expenses.
Running personal spending through the S-Corp account invites IRS adjustment. Separate accounts, clean bookkeeping, and owner draws to fund personal spending is the fix.
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Failing to coordinate retirement contributions.
The S-Corp salary is also the basis for Solo 401(k) and SEP IRA contributions. A salary set purely for FICA optimization may leave retirement contribution capacity on the table.
The Real Question
S-Corp vs. LLC: How to Decide
This is one of the most common questions we get from new 1099 physicians, and the answer is almost always: it is not S-Corp vs. LLC. It is LLC (or PLLC, or PC depending on your state), with or without an S-Corp election on top. The legal entity provides liability protection. The S-Corp election is a federal tax classification that sits on top of the legal entity.
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For most self employed physicians, the path is: form the right legal entity for your state, default to pass-through tax treatment until net income justifies the administrative cost of S-Corp, then file Form 2553 once net income reaches roughly $80,000 to $100,000+. For the full entity selection framework, see our physician entity formation guide.
Why Doc Wealth
How Doc Wealth Handles S-Corp Election
S-Corp election is one of the most common moves we make for new clients, and we treat it as part of a complete tax planning engagement. A typical engagement looks like this:
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Analyze whether election makes sense based on income, state, W-2 status, and projected stability
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Choose or confirm the right legal entity (LLC, PLLC, PC) for the physician's state
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File Form 2553 with the IRS
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Set reasonable compensation using benchmark data and document the methodology in writing
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Run payroll through our internal payroll team with the appropriate filings
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File Form 1120-S annually with the integrated K-1 to the physician's personal return
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Layer on the next moves S-Corp election unlocks: retirement plan stacking, the PTET election, the Augusta Rule, hiring children if applicable
We work with thousands of physician clients across all 50 states. Our expert team includes Tax Attorneys, CPAs, and Enrolled Agents working proactively, year round. Communication is prompt and dependable, the relationship runs year long, and there are no long term contracts.
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Doc Wealth partners closely with the leading voices in the physician community, and our work focuses exclusively on physicians. Read more on our physician tax planning page.
Answers
Frequently Asked Questions
Still want to talk through your situation? Your first call is free.
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Should every physician with 1099 income elect S-Corp?
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Should every physician with 1099 income elect S-Corp?
No. S-Corp election generally makes sense once net practice income clears approximately $80,000 to $100,000, and it almost always makes sense above $150,000. Below those levels, the administrative cost of payroll, the additional return, and state filings can offset the FICA savings. The right answer depends on income level, state, whether the physician has W-2 attending income, and how stable the 1099 income is.
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What happens if my reasonable salary is too low?
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What happens if my reasonable salary is too low?
The IRS can recharacterize your distributions as wages, assess back FICA taxes, and add penalties and interest. Reasonable compensation audits are increasingly common for professional service S-Corps. The protection is written documentation referencing specialty, geography, hours, and benchmark sources, prepared at the time the salary was set.
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Can I elect S-Corp mid-year?
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Can I elect S-Corp mid-year?
Generally no. Form 2553 must be filed within two months and 15 days of the start of the tax year you want the election to apply to. Late election relief is available under IRS Rev. Proc. 2013-30 if you meet specific conditions. Mid-year switching from sole proprietor to S-Corp requires specific structuring.
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Does S-Corp election affect my retirement contributions?
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Does S-Corp election affect my retirement contributions?
Yes. Solo 401(k) and SEP IRA contributions are calculated based on W-2 compensation from the S-Corp, not on the distribution. The reasonable salary needs to be set with retirement plan capacity in mind, not only with FICA optimization in mind. We coordinate the salary, the retirement plan, and the tax planning as one integrated decision.
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Do I need to run payroll if I am the only employee?
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Do I need to run payroll if I am the only employee?
Yes. If you elect S-Corp treatment and you are an owner employee, you must be paid through W-2 payroll, including withholding, quarterly Form 941, an annual Form 940, and W-2 issuance. Skipping payroll is one of the fastest ways to lose the S-Corp position in an exam.
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How much does it cost to maintain an S-Corp?
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How much does it cost to maintain an S-Corp?
Direct costs include payroll processing, Form 1120-S preparation, state level S-Corp or franchise filings, and entity maintenance. At Doc Wealth, all of this is included in the integrated tax planning engagement rather than billed separately. The breakeven point at which the federal FICA savings exceed the all in cost is generally around $80,000 to $100,000 of net practice income.
Resources
Keep Reading
Physician Entity Formation: LLC, PLLC, and S-Corp Setup
Physician Payroll: How S-Corp Payroll Works
S-Corp Tax Structure for Physicians: Is It Right for You?
1099 Physicians: Should I Form an S-Corp or LLC?
The SEP-IRA Trap Every Self-Employed Physician Should Know About
Take the Next Step
Ready to Run the S-Corp Numbers for Your Practice?
If you are a self employed physician without a current S-Corp analysis, the federal FICA math may not be working in your favor. Our tax team analyzes the breakeven, sets reasonable compensation against benchmark data, files the election, runs the payroll, and handles the 1120-S as part of one integrated engagement.
Disclaimer: This material is intended for educational and informational purposes only and does not constitute tax, legal, accounting, or financial advice. The content is general in nature and may not apply to your specific circumstances. Tax laws and financial regulations are subject to change and interpretation, and the application of these laws can vary based on individual situations. Before making any decisions, you should consult with a qualified tax advisor, legal counsel, or financial professional.