For a dental practice owner in Miami, the choice between operating as an LLC or an S-Corp is not merely a legal formality — it's one of the most impactful financial decisions you will make as a practice owner. Miami-Dade County's dental market is among the most active in Florida, with strong demand driven by a large, culturally diverse population, significant healthcare tourism, and a growing number of cosmetic and specialty practices. That demand translates into high production revenue — and high production revenue means the tax structure of your practice entity can represent a difference of $10,000 to $30,000 or more per year in self-employment taxes alone.
This guide walks through the key structural options available to Miami dental practice owners, comparing the LLC and S-Corp from a federal tax perspective, explaining how health insurance deductibility works under each structure, and covering Florida-specific factors that affect the decision. The goal is to give you a clear framework for the conversation you should be having with your CPA and healthcare attorney before your next tax year begins.
The Core Question — S-Corp or LLC for Miami Dental Practices
The fundamental tax issue driving the S-Corp vs. LLC debate for Miami dentists is self-employment tax. When a dental practice is structured as a single-member LLC taxed as a sole proprietorship, 100% of net practice income is subject to self-employment tax (15.3% on the first $176,100 in 2026, then 2.9% above that). When practice income flows through an S-Corp, only the owner's "reasonable salary" is subject to FICA/payroll taxes — distributions above the salary amount are not. For a high-producing Miami dental practice, this split can generate very large annual savings.
The S-Corp structure does not eliminate taxes — it eliminates self-employment tax on the portion of practice income taken as distributions rather than salary. The salary itself remains subject to FICA. The savings come from the salary/distribution split, which requires the salary to be reasonable and defensible — not artificially low.
LLC Structure for Florida Dental Practices
Single-Member LLC (Default Sole Prop Taxation)
A single-member LLC owned by one dentist is treated as a "disregarded entity" for federal tax purposes by default. All practice net income flows to the owner's Schedule C and is subject to self-employment tax in full. This is the simplest structure administratively — no separate payroll required, no corporate formalities — but it carries the highest SE tax burden. For a Miami dentist netting $350,000 after expenses, the SE tax on the full $350,000 is approximately $29,000. That number drives many Miami dental practice owners to evaluate S-Corp election.
Multi-Member LLC (Partnership Taxation)
When two or more dentists co-own a practice through an LLC, the entity is taxed as a partnership by default. Each member's distributive share of income is reported on Schedule K-1 and is generally subject to self-employment tax, though the rules for guaranteed payments vs. ordinary income create some nuance that a tax advisor can work through for a specific partnership arrangement.
LLC Elected as S-Corp
A single-member or multi-member LLC can file IRS Form 2553 to elect S-Corp tax treatment. This is a popular option for Miami dental practices because it allows the owners to retain Florida's relatively simple LLC operating structure under state law while achieving S-Corp federal tax treatment. The LLC remains an LLC for state law purposes but is treated as an S-Corp for federal income tax purposes — getting the payroll/distribution split without forming a separate corporation.
S-Corp Advantages for Miami Dental Practice Owners
Reasonable Salary + Distributions Split
The core S-Corp advantage is the ability to pay yourself a reasonable salary as a dentist-employee of your own corporation, with remaining practice profits taken as shareholder distributions. Only the salary is subject to FICA payroll taxes (7.65% employer + 7.65% employee = 15.3%). Distributions are not subject to FICA or self-employment tax. For a Miami dental practice producing $500,000 in net income, a reasonable salary of $160,000 means only $160,000 is subject to full FICA — the remaining $340,000 in distributions is not. That split saves approximately $26,000 in FICA taxes annually compared to the LLC/sole prop default.
Self-Employment Tax Savings
The combined employer and employee FICA rate is 15.3% on wages up to the Social Security wage base ($176,100 in 2026), then 2.9% (Medicare only) above that. For high-producing Miami dentists, the savings from running distributions through an S-Corp rather than taking everything as SE income can be substantial. The key constraint: the IRS requires the salary to be "reasonable" — meaning comparable to what a third-party employer would pay for the same clinical work. Aggressive underpayment of salary is a known IRS audit trigger.
Health Insurance Deductibility for S-Corp Owners
S-Corp majority shareholders (owning more than 2% of shares) must follow a specific process to deduct health insurance premiums: (1) the S-Corp pays the premium directly or reimburses the shareholder; (2) the premium is included in the shareholder's W-2 Box 1 as wages; (3) the shareholder deducts the premium on Schedule 1 of their personal return under the self-employed health insurance deduction. If any step in this sequence is omitted, the deduction is disallowed. This is one of the most frequently mishandled tax items in S-Corp dental practices.
Miami dental practice netting $480,000: as a sole prop LLC, SE tax on $480,000 ≈ $37,000. As an S-Corp with $155,000 reasonable salary + $325,000 in distributions: FICA on $155,000 ≈ $23,715. Annual SE tax savings: approximately $13,285 — before accounting for the employer half of FICA being deductible as a business expense.
Health Benefits Through Your Miami Dental Practice Entity
Regardless of whether your Miami dental practice operates as an LLC or S-Corp, health insurance is one of the most impactful tax deductions available — and the structure of your entity determines exactly how the deduction is captured.
For group health insurance covering your staff, employer-paid premiums are fully deductible as a business expense under IRC Section 162, in both LLC and S-Corp structures. A Miami dental practice with five staff members paying $650 per month per employee generates $39,000 in fully deductible annual premiums.
A Section 125 cafeteria plan (Premium Only Plan) allows your Miami dental practice staff to pay their share of premiums with pre-tax dollars, reducing your firm's FICA payroll base. Employer FICA savings from a Section 125 plan are available regardless of whether the practice is an LLC or S-Corp.
For the practice owner: in an LLC taxed as sole prop, health insurance premiums are deducted on Schedule 1. In an S-Corp, they must flow through the W-2 as described above before being deducted on Schedule 1. Both achieve 100% deductibility when handled correctly.
A High-Deductible Health Plan (HDHP) paired with a Health Savings Account (HSA) adds another layer: up to $4,300 (self-only) or $8,550 (family) in 2026 in pre-tax contributions, deductible by the business if employer-funded and excluded from employee income.
For detailed guidance on group health options for Miami dental practices, visit SunState Coverage's small business health insurance guide.
Florida-Specific Factors for Dental Practice Entity Selection
- No Florida personal income tax: Florida imposes no personal income tax, so the S-Corp vs. LLC decision is purely a federal tax question for most Miami dental practice owners. Every dollar of tax savings from the salary/distribution split reduces only your federal tax bill — but that's still a very significant number given Miami practices' production levels.
- Florida professional licensing: Under Florida law, the DDS or DMD license is held by the individual dentist, not the entity. Florida allows dental professionals to operate through a Professional Association (PA) or Professional Limited Liability Company (PLLC). A PA can elect S-Corp treatment. Operating through a general LLC or corporation without proper professional entity formation may conflict with Florida licensing regulations — consult a Florida healthcare attorney.
- Florida corporate income tax: Florida imposes a 5.5% corporate income tax on C corporations. S-Corps and LLCs are pass-through entities and do not pay the Florida corporate income tax at the entity level — a significant reason to avoid C-Corp structure for Miami dental practices.
- Malpractice and liability: Both LLC and S-Corp structures provide liability separation between the owner's personal assets and practice liabilities. In a high-litigation market like Miami-Dade, proper entity formation and malpractice insurance coverage are both essential.
When S-Corp Makes Sense vs. When LLC Alone Is Better
| Factor | S-Corp Advantage | LLC-Only Advantage |
|---|---|---|
| Practice net income | Above ~$80,000–$100,000 net | Below ~$60,000–$80,000 net |
| SE tax savings potential | High — distributions not subject to FICA | None — all net income subject to SE tax |
| Administrative complexity | Higher — payroll required, W-2, corporate minutes | Lower — simpler filing, no payroll required |
| Payroll costs | Ongoing payroll processing fees | No payroll required (sole prop) |
| Health insurance deductibility | Full — must follow W-2 inclusion sequence | Full — simpler Schedule 1 deduction |
| Retirement plan options | Same — SEP-IRA, SIMPLE IRA, 401(k) available | Same — full retirement plan access |
| Florida licensing compliance | PA or PLLC with S-Corp election recommended | PLLC recommended |
Common Mistakes Dental Practices Make With Entity Structure
- Setting unreasonably low salary in an S-Corp: Paying a $50,000 salary on a $600,000 production practice is an IRS audit trigger. Reasonable salary must reflect the market rate for dental services performed. Get a documented salary benchmark from your CPA before filing.
- Handling S-Corp health insurance outside the W-2: Majority shareholders who pay premiums personally and simply deduct them on Schedule 1 without flowing them through the W-2 will have the deduction disallowed on audit. The corporation must pay or reimburse and include in Box 1 wages.
- Operating as a general LLC without proper professional entity formation: Florida requires dentists to operate through a PA or PLLC. Using a general LLC or corporation without professional entity status may violate Florida licensing law.
- Not establishing a Section 125 plan: Running staff health insurance through payroll without a formal Section 125 plan document means employee contributions are after-tax, costing the practice and its staff FICA dollars unnecessarily.
- Electing S-Corp status without analyzing the breakeven point: The S-Corp saves SE taxes but adds payroll processing costs, CPA fees for corporate returns, and administrative complexity. For practices netting below $60,000–$80,000, these costs may exceed the SE tax savings. Run the numbers before electing.
For plan comparison tools and individual health insurance options in Miami-Dade County, visit FloridaPlanFinder.com, our sister site for Florida health plan research.
This article provides general educational information about entity structure and tax concepts. It is not legal or tax advice. The S-Corp vs. LLC decision involves federal tax law, Florida professional licensing requirements, and your practice's specific financial situation. Consult a licensed CPA and a Florida healthcare attorney before making entity structure decisions.
S-Corp vs. LLC Summary Comparison for Miami Dental Practices
| Feature | Single-Member LLC (Default) | LLC or PA Taxed as S-Corp |
|---|---|---|
| Federal tax treatment | Sole proprietorship (Schedule C) | Pass-through with payroll split |
| SE tax on all net income | Yes | No — only on reasonable salary |
| Payroll required | No | Yes — for owner's salary |
| Health insurance deduction | Schedule 1 (simpler) | Must flow through W-2 first |
| HSA with HDHP | Available | Available |
| Florida income tax | None (no FL personal income tax) | None (no FL personal income tax) |
| FL corporate income tax | None (pass-through) | None (S-Corp is pass-through) |
| Administrative complexity | Low | Moderate — payroll, W-2, 1120-S |
| Best for practices netting | Under ~$80,000 | Over ~$100,000 |
| FL professional entity | PLLC recommended | PA or PLLC with S election |
Frequently Asked Questions
Can a Miami dental practice S-Corp save on self-employment taxes?
Yes. An S-Corp allows a dentist-owner to split practice income between a reasonable salary (subject to FICA/SE tax) and distributions (not subject to SE tax). In a high-revenue Miami dental practice, this split can save $15,000 or more in SE taxes annually — a significant advantage over a single-member LLC taxed as a sole proprietorship.
Does a Miami dental practice need a separate professional entity (PA or PLLC)?
Florida law generally requires licensed professionals, including dentists, to hold their license individually — not through an entity. However, Florida allows dentists to operate through a Professional Association (PA) or Professional Limited Liability Company (PLLC). The PA can elect S-Corp tax treatment. Consult a Florida healthcare attorney for structure guidance.
How does health insurance deductibility differ between LLC and S-Corp for a Miami dentist?
In a single-member LLC taxed as a sole prop, the dentist deducts health insurance premiums on Schedule 1 of their personal return. In an S-Corp, the majority shareholder's health insurance premiums must be paid by or reimbursed by the corporation, included in W-2 Box 1 wages, and then deducted on Schedule 1. Both approaches achieve full deductibility — but the S-Corp sequence must be followed precisely or the deduction is disallowed.
What is a reasonable salary for an S-Corp dental practice owner in Miami?
The IRS requires that S-Corp owner-employees receive a "reasonable salary" for services rendered — meaning compensation comparable to what an arm's-length employer would pay for the same work. For Miami dentists, reasonable salary benchmarks typically range from $120,000 to $200,000+ depending on specialty, hours, and production volume. This must be defensible if audited.
Can a Miami dental practice LLC elect to be taxed as an S-Corp?
Yes. An LLC can file IRS Form 2553 to elect S-Corp tax treatment. This allows the practice to retain the simpler LLC operating structure under Florida state law while achieving S-Corp federal tax treatment — including the salary/distribution split that reduces self-employment taxes.