Should Your Practice Be an S Corp? Incorporating a Chiropractic, Dental, or Medical Practice

For most profitable practices, yes, an S corporation election saves real money every year, and the point where it starts paying is lower than many owners assume. But the S corp is one decision inside a larger structure question, and getting the structure right is worth more than any single deduction you will ever find. Here is how to think about it.

The problem the S corp solves

If you operate as a sole proprietor or a single-member LLC taxed as one, every dollar of practice profit is subject to self-employment tax on top of income tax. That is 15.3% on earnings up to the Social Security wage base and 2.9% above it, plus an additional 0.9% Medicare surtax at higher incomes. On $300,000 of profit, that is tens of thousands of dollars before your income tax is even calculated.

An S corporation splits your profit into two buckets. You pay yourself a reasonable salary as a W-2 employee, and payroll taxes apply to that salary. The remaining profit passes through to you as a distribution, and distributions are not subject to self-employment or payroll tax. The savings is the payroll tax on the portion of profit you take as distributions.

Where the savings show up

Consider a practice with $300,000 of net profit. As a sole proprietor, roughly the full amount is subject to self-employment tax. As an S corporation paying the owner a $150,000 salary, payroll tax applies to $150,000 and the other $150,000 comes out as distributions. The difference in employment tax alone can run well into five figures a year, every year.

The savings grow with profit, which is why we tell owners the S corp conversation should start once the practice clears roughly $75,000 to $100,000 in net profit. Below that, the added costs eat the benefit. Above it, the math is rarely close.

The rules you have to respect

Reasonable compensation. The IRS requires your salary to reflect what a practice would pay someone else to do your job. Paying yourself $40,000 and taking $260,000 in distributions invites a reclassification and penalties. A defensible salary is set from compensation data for your profession and region and documented in your records.

Added costs. An S corporation files its own return, runs payroll, and in many states pays a franchise or entity-level tax. Budget a few thousand dollars a year in compliance costs against the savings.

Professional entity rules. In many states, including North Carolina, licensed professionals must organize as a professional corporation or professional LLC rather than a general business entity. The S election is made on top of that entity. Get the entity type right first.

Payroll discipline. You are now an employee of your own company. Payroll has to run on schedule, with proper withholding and filings. Miss it and the savings turn into penalties.

Where the S corp interacts with everything else

This is the part most owners never hear about, because a filer sees the S corp as a checkbox and a planner sees it as a lever connected to four others.

The QBI deduction. Section 199A allows a 20% deduction on qualified business income for pass-through owners, and the 2025 tax law made it permanent. Health care is a specified service business, so the deduction phases out at higher incomes. Your salary decision affects your QBI, and your QBI decision affects the optimal salary. They have to be set together.

Retirement plans. Your W-2 salary is the base for employer retirement contributions. A higher salary costs more payroll tax but allows larger contributions to a 401(k) or a cash balance plan. For a high-earning practice owner, a properly designed plan can shelter six figures a year, which changes the reasonable-comp calculation entirely.

Health benefits. Owner health insurance and reimbursement arrangements follow different rules for S corporation owners than for other structures. Handled correctly they are deductible. Handled the way a sole proprietor would, they are not.

The R&D credit. Credits pass through to owners on the S corporation return. If your practice develops treatment protocols or integrates new technology, the credit stacks on top of the structural savings.

When the S corp is not the answer

• Profit is under roughly $75,000 and likely to stay there.
• You are adding partners and need the flexibility of a partnership structure, where special allocations and different classes of ownership are possible.
• You plan to hold real estate inside the entity. Do not. Real estate belongs in a separate entity for liability and tax reasons.
• You are close to a sale. The structure that minimizes annual tax is not always the structure that minimizes tax on an exit, and converting late has consequences.

Frequently asked questions

How do I elect S corporation status?
File Form 2553 with the IRS, generally within two months and fifteen days of the start of the tax year you want it to apply to. Late elections are often available if you qualify for relief.

Can my LLC be an S corporation?
Yes. An LLC is a state-law entity; the S corporation is a federal tax election. Most practice S corporations are PLLCs or professional corporations that made the election.

What salary should I pay myself?
Enough to be defensible as market compensation for your role, set against your profit, your retirement plan goals, and your QBI position. There is no safe percentage rule of thumb.

Will I still get the 20% QBI deduction?
Possibly. It depends on your taxable income. Health practices phase out above the annual thresholds. This is exactly the interaction that planning is for.

Is it too late to convert this year?
Often not. Late election relief exists and there are ways to structure a mid-year change. Ask before you assume.

Sources

• IRS, S Corporations: https://www.irs.gov/businesses/small-businesses-self-employed/s-corporations
• IRS, About Form 2553, Election by a Small Business Corporation: https://www.irs.gov/forms-pubs/about-form-2553
• IRS, Qualified Business Income Deduction: https://www.irs.gov/newsroom/qualified-business-income-deduction
• IRS, Self-Employment Tax: https://www.irs.gov/businesses/small-businesses-self-employed/self-employment-tax-social-security-and-medicare-taxes

This article is general information, not tax advice for your situation. Entity decisions depend on your state, your profit, and your goals. Quartermaster Tax Management builds and implements tax plans for private practice owners nationwide, alongside your CPA. Start with a fifteen-minute Fit Call.