Dental Practice Owner Taxes & Retirement: Keep More, Pay Less, Plan for Exit
By KamGeneral1,303 words7 min read
You generate $1.2M in collections. You feel rich. Then tax time comes.
Turns out $240K goes to federal and state taxes, another $80K goes to self-employment taxes, and you're left with $880K. The practice owner next to you with the same $1.2M in collections paid $165K in taxes and kept $950K.
The difference isn't luck. It's structure.
Most dental practices are operated as sole proprietorships or simple LLCs. This is the most tax-inefficient structure for high-income earners. A small change—moving to an S-Corp, maximizing retirement contributions, or strategically timing expense deductions—can save $50K–$150K per year.
This guide walks you through the tax and retirement optimization strategies that top-performing Southeast dental practices use.
Entity Structure: LLC vs. S-Corp vs. C-Corp (The Numbers)
Why Structure Matters More Than You Think
Your entity structure determines how much you pay in self-employment taxes. For a dental practice, this is the single biggest tax decision you'll make.
Sole Proprietor or Single-Member LLC (Default S-Corp Election)
How it works: You report all practice income on your personal tax return. You pay federal income tax + 15.3% self-employment tax on all net profit.
Example: $600K net practice profit
Federal income tax: ~$150K (25% bracket)
Self-employment tax: ~$92K (15.3% on full $600K)
Total tax: $242K
Take-home: $358K
S-Corp Election
How it works: You split income into "salary" (W-2) and "distributions" (profit). You pay self-employment tax only on the W-2 salary, not on distributions.
Example: Same $600K net profit, but structured as $250K salary + $350K distribution
Federal income tax: ~$145K (on combined $600K)
Self-employment tax: ~$38K (15.3% on only $250K salary)
Total tax: $183K
Take-home: $417K
Savings: $59K per year. Over 10 years: $590K.
The trade-off: S-Corp requires more accounting ($2K–$5K annually), quarterly estimated taxes, and a separate business tax return. But the savings pay for itself 30x over.
Who should use S-Corp?
Any practice generating $300K+ in net profit. Below that, the complexity isn't worth the savings.
C-Corp (Rarely recommended for dental practices)
Double taxation makes C-Corp inefficient for personal service businesses. Skip it.
The IRS lets you contribute far more to retirement than most practice owners realize. If you're only doing a standard 401(k) ($23,500 limit for 2024), you're leaving money on the table.
SEP-IRA (Simplified Employee Pension)
Contribution limit: Up to 25% of net profit, max $69,000/year (2024).
Best for: Solo practices, no employees.
Setup cost: <$500, very simple.
Example: $600K net practice profit (S-Corp with $250K W-2 salary)
Solo 401(k)
Contribution limit: Up to $69,000/year (or $76,500 with catch-up).
Best for: Solo practices, flexibility, ability to borrow against balance.
Setup cost: $1,000–$2,000.
Defined Benefit Plan (DB Plan)
Contribution limit: Unlimited (determined by actuarial calculation).
Best for: Established practices with $400K+ annual income; can contribute $100K–$200K+/year.
Setup/admin cost: $3K–$8K annually, but the contribution capacity is huge.
Example: High-income practice ($800K net profit) with defined benefit plan
Annual DB contribution: $150,000 (determined by actuarial formula)
Tax savings: $150K × 24% = $36,000 per year
Over 20 years: $720,000 in tax savings while building retirement assets
The Strategic Stack:
Most optimized practices use S-Corp structure + Solo 401(k) or DB Plan + maxed-out HSA ($4,150/year).
S-Corp + Solo 401(k): $250K salary + $62,500 retirement = saves ~$15K/year in taxes
S-Corp + DB Plan: $250K salary + $150K–$200K retirement = saves ~$36K–$48K/year
Deduction Strategy: $40K–$80K in "Lost" Deductions
What Most Practices Are Missing
Beyond entity structure and retirement, there are deductions most practices miss.
Legitimate Deductions Practices Often Miss:
Home Office Deduction (if you have a dedicated admin/business space at home): $5–$20K/year depending on square footage and percentage of home used.
Vehicle Deduction: $0.67/mile (2024) for business miles. If you drive 20K business miles/year = $13,400 deduction. Most practices claim <$5K.
Continuing Education: Professional development, conferences, courses = 100% deductible. Most practices spend <$2K. Top practices budget $5K–$10K.
Equipment Depreciation: Dental chairs, imaging systems, software. Accelerated depreciation (Section 179) allows you to deduct up to $1.32M in equipment purchases in a single year. If you buy a new chair for $15K, you can deduct the full $15K in year one (under Section 179) rather than depreciating over 5 years.
Professional Services: Accounting, legal, consultant fees = 100% deductible. If you hire a practice consultant or coach (like CMC), it's fully deductible.
Software & Subscriptions: PMS software, scheduling systems, marketing tools, email services. Most practices miss $3K–$10K in annual software deductions.
Marketing & Advertising: Website, Google Ads, content creation, email marketing. Most practices undersell this; if you're spending on marketing, it's deductible.
Retirement Contributions for Employees: If you have associates or employees, you're required to offer retirement plans. But the employer contribution you make is deductible. Often overlooked.
Premium practice (systemized, recurring, high-margin): 1.5–2.0x annual revenue
Example:
$1.2M practice at 22% margin, average systems: 0.9x multiple = $1.08M sale price
$1.2M practice at 28% margin, documented systems, 75% recurring: 1.5x multiple = $1.8M sale price
The difference? $720K. And that difference comes from the choices you make today on structure, profitability, and systematization.
Structural Setup for Exit Success:
S-Corp or LLC structure (clean, transferable)
Documented systems and procedures (not dependent on you)
Recurring revenue model (recall program, membership, high-case-acceptance patients)
Clean financials (audit-ready)
Employment agreements with associates (non-compete, transition clauses)
If you're building to sell or transition, these decisions matter 5–10 years before the sale.
Want to audit your practice structure, identify your biggest tax optimization opportunities, and build a 5-year exit plan?
CTA:Book a free strategy call — we'll calculate your current tax burden, model your potential savings under an optimized structure, and walk you through a transition roadmap (whether that's scaling, selling, or succession planning).