Why Dentists Overpay $30,000+ in Taxes Every Year (And How to Stop)

Reason 1: Wrong Entity Structure

Many dentists operate as sole proprietors, single-member LLCs, or professional corporations with no S-Corp election. This means all practice net income is subject to self-employment tax at 15.3% (up to the Social Security wage base) plus regular income tax. At $350,000 in net income, that's roughly $25,000+ in unnecessary SE tax annually.

With an S-Corp election, a dentist can pay themselves a reasonable salary (perhaps $120,000–$160,000 for a practicing dentist/practice owner) and take remaining profits as distributions not subject to SE tax. On $350,000 in net income with a $130,000 salary, that's $220,000 in distributions that avoid SE tax—saving approximately $17,000 per year in FICA taxes alone.

Important note: State laws governing professional corporations (PCs) and dental licensing vary. In some states, a dental practice must operate as a professional corporation, which can still elect S-Corp status. Work with an advisor who knows your state's specific rules for dental professional entities.

Reason 2: No Retirement Plan (or the Wrong One)

Dentists are typically high earners who start their practice careers with significant debt and spend the early years focused on paying it down. By the time they're debt-free and generating substantial profits—often in their mid-to-late 30s—they've missed years of tax-advantaged retirement savings. And many are still not using the right plan even when they do start contributing.

Here's the ladder of retirement plan options for dental practice owners, from least to most powerful:

• SEP IRA: Simplest to set up. Allows a deduction of up to 25% of compensation, max $70,000 in 2025. No employee contributions. Best for solo practices with no employees or minimal staff.
• Solo 401(k): For owner-only practices (or those with no eligible employees). Higher contribution limits with catch-up provisions. More flexible investment options.
• SIMPLE IRA: For practices with employees. Lower contribution limits. Often not the best option for high-income dentists.
• Defined Benefit Plan: For dentists over 40 with high income and no (or minimal) employees. Can allow deductions of $100,000 to $275,000+ per year. This is the single most powerful tax reduction tool available to high-income dental practice owners.
• Cash Balance Plan: A hybrid between a defined benefit and defined contribution plan. Provides large deductions while being somewhat more flexible than a traditional DB plan.

A dentist earning $400,000 who establishes a defined benefit plan and contributes $200,000 per year saves approximately $74,000 in federal income taxes at a 37% effective rate. That's the difference between paying $148,000 in federal tax and paying $74,000. See our detailed guide on dental practice retirement planning for a complete breakdown of each plan type.

Reason 3: Missing Equipment Deductions

Dental practices invest in expensive equipment on a regular cycle—digital X-ray systems, CBCT imaging, dental chairs, CEREC machines, CAD/CAM systems, and lasers. These investments typically run $50,000 to $300,000+ per item. Section 179 and bonus depreciation allow dental practices to deduct these costs in the year of purchase rather than over 5–7 years.

A dental practice that purchases a $200,000 CBCT system this year can deduct the entire cost using Section 179 (well within the $1.22M annual limit). At a 37% effective federal and state rate, that's a $74,000 tax savings in a single year. The dental equipment upgrade cycle becomes a tax planning opportunity when managed intentionally.

For a complete guide to dental equipment tax strategies, including how to time purchases, whether to buy or lease, and how to maximize deductions on large-ticket items, see our dedicated guide on dental equipment tax strategy.

Reason 4: No Income Splitting Strategy

Many dental practice owners are the sole high earner in their household, paying income tax at the top marginal rate. Income splitting strategies can legitimately shift some income to lower-bracket family members, reducing the overall family tax burden.

Hire Your Spouse

If your spouse does legitimate work for the practice (administrative, marketing, bookkeeping, patient coordination), paying them a reasonable salary shifts income that would otherwise be taxed at your top rate to their potentially lower rate. The salary is deductible to the practice and can also allow a spouse to contribute to their own retirement account.

Hire Your Children

Children performing legitimate business services (filing, data entry, social media, patient communication) can be paid up to $14,600 in 2025 with no federal income tax owed (that's the standard deduction amount for a single filer). The payment is deductible to the practice. This is a legitimate strategy when children are doing real work and are paid a market rate.

Practice Management Company Structure

Some high-income dentists benefit from separating the practice entity (which generates professional income) from a management or real estate entity (which provides services or office space). Done properly, this allows income to be allocated differently and can create additional deductible expenses. This is an advanced strategy that requires careful planning and proper documentation.

Reason 5: No Proactive Tax Planner

The root cause of all of the above issues is the same: dental practice owners are typically working with a generalist CPA who files their return competently but doesn't specialize in dental practice tax planning and doesn't do year-round proactive planning.

A dental-practice-focused tax strategist knows the specific entity structure options available in your state, understands the retirement plan landscape for high-income professionals, and will proactively identify equipment purchase timing opportunities and income splitting strategies. They pay for themselves many times over. See our guide on what proactive tax planning looks like vs. just filing to understand the difference.

The $30K Gap: What It Looks Like in Practice

Here's a realistic example of what a dentist at $400,000 in net practice income leaves on the table without proactive planning:

That's over $60,000 per year in missed savings for a dentist at $400,000 in net income. Even at $250,000 in net income, the gap is typically $25,000 to $35,000 per year. Over a 20-year career, this is the difference between retiring with $1.5M in additional wealth or not. If you're in this situation, our $10K tax savings guarantee is a good first step to see exactly what you've been missing.

Frequently Asked Questions