As we approach year-end, dental practice owners face a unique window of opportunity to optimize their tax position before December 31st. With the One Big Beautiful Bill Act now making key provisions permanent and several expiring credits on the horizon, strategic planning has never been more critical.
The 2025 Tax Landscape: What’s Changed
The enactment of the OBBBA in July 2025 brought significant stability to tax planning. Individual tax rates are now permanent and indexed for inflation, while the qualified business income deduction remains at 20% indefinitely. For dental practice owners, this means you can plan with confidence beyond the annual scrambling that characterized previous tax years.
However, not everything is permanent. The SALT deduction cap has increased to $40,000 through 2029, providing meaningful relief for practices in high-tax states. Additionally, a temporary senior deduction of $6,000 applies through 2028 for taxpayers 65 and older—an often-overlooked benefit for dentists approaching retirement.
Equipment Purchases: Timing Is Everything
One of the most powerful tools in your year-end arsenal is accelerated depreciation. Bonus depreciation has returned to 100% for property placed in service after January 19, 2025. This means that CBCT machines, intraoral scanners, dental chairs, and other equipment purchased before year-end can be fully expensed in 2025.
Section 179 expensing allows you to deduct up to $2.5 million in equipment purchases, with the phase-out beginning at $4 million. For most dental practices, this effectively means unlimited expensing for typical equipment acquisitions.
Don’t forget the vehicle depreciation strategy. Heavy SUVs exceeding 6,000 pounds qualify for 100% bonus depreciation, while standard vehicles face annual caps starting at $20,200 in year one. If you’re considering a practice vehicle, the math heavily favors larger vehicles purchased before December 31st.
Pro tip: Equipment charged to a credit card by December 31st counts as a 2025 deduction, even if you don’t pay the bill until 2026. This gives you cash flow flexibility while securing the tax benefit.
The Pre-Payment Strategy: Your 12-Month Safe Harbor
Under IRS safe-harbor rules, you can prepay up to 12 months of expenses and deduct them in 2025. This applies to dental lab fees, supply contracts, equipment leases, rent (if you’re a tenant), professional liability insurance, and continuing education registrations.
For practices with strong cash flow and predictable 2026 income, accelerating these expenses into 2025 provides immediate tax relief. However, be strategic—don’t sacrifice cash flow just to save taxes. The rule of thumb: never spend a dollar just to save 37 cents.
S-Corporation Optimization: The W-2 Balance
Most dental practices operate as S-corporations, which creates a delicate balancing act between W-2 wages and distributions. Your W-2 compensation must be “reasonable” to avoid IRS scrutiny, but excess compensation subjects you to unnecessary payroll taxes.
The sweet spot? Pay yourself enough W-2 to justify your role as owner-dentist (typically $200,000-$300,000 depending on your market and production), then take the remainder as distributions. Distributions avoid the 3.8% Medicare tax, creating immediate savings on six-figure incomes.
Additionally, ensure your retirement plan contributions allocate at least 70% to key employees for full deductibility. Consider increasing year-end deferrals to stay within QBI phase-out thresholds ($197,300-$247,300 for single filers, $394,600-$494,600 for married filing jointly).
Charitable Planning: The 2026 Cliff
Beginning in 2026, charitable deductions face two new restrictions: a 0.5% AGI floor and a 35% deduction benefit cap for top tax brackets. This makes 2025 the optimal year for bunching charitable contributions.
Consider establishing a donor-advised fund and contributing multiple years’ worth of charitable gifts in 2025. You receive the full deduction this year while distributing the funds to charities over subsequent years. For practices generating $500,000+ in taxable income, this strategy can save tens of thousands in taxes.
Dentists age 70½ or older should explore qualified charitable distributions from IRAs. You can direct up to $108,000 to charity, satisfying your required minimum distribution without increasing adjusted gross income. This is particularly valuable for managing Medicare premium surcharges and the net investment income tax.
Expiring Energy Credits: Act Before December 31st
Two valuable credits disappear after 2025: the Residential Clean Energy Credit (30% for solar panels and geothermal systems) and the Energy-Efficient Home Improvement Credit (up to $3,200 for windows, doors, and HVAC upgrades).
If you’ve been considering solar for your home or practice building, 2025 is the year to act. The 30% credit on a $50,000 residential solar installation saves $15,000—a benefit that vanishes entirely in 2026.
Electric vehicle credits also sunset after September 30, 2025, though leased vehicles remain eligible. If you’re in the market for a practice vehicle, explore leasing options for EVs before the deadline.
Retirement Contributions: Maximize Your Deferrals
The 2025 contribution limits increased across the board. Solo 401(k) plans now allow $23,500 in deferrals plus $7,500 catch-up for those 50 and older, with profit-sharing contributions bringing the total to $70,000 (or $77,500 with catch-up).
For married dentists employing a spouse, adding them to payroll creates additional retirement contribution opportunities while making family travel and vehicle costs deductible business expenses. Ensure compensation is reasonable for services rendered, but don’t overlook this powerful wealth-building strategy.
Capital Gains Management: Harvest Smartly
Net capital losses offset capital gains plus up to $3,000 of ordinary income annually, with unused losses carrying forward indefinitely. Review your investment portfolio for positions with unrealized losses that can offset gains realized earlier in the year.
However, beware the wash-sale rule. If you repurchase the same or substantially identical security within 30 days before or after the sale, the loss is disallowed. Consider using this period to shift into similar but not identical investments to maintain market exposure while preserving the tax benefit.
Long-term capital gains enjoy 0% federal tax rates up to $48,350 for single filers and $96,700 for married couples. If you’re in or near retirement, strategic realization of gains within these thresholds can reset your cost basis without triggering federal tax.
The Self-Rental Strategy: Real Estate Excellence
Dentists who own their practice building and lease it to their practice create self-rental income exempt from the 3.8% Medicare tax. While this income offsets passive losses from other rental properties, it provides a tax-advantaged way to build real estate wealth while reducing practice operating expenses.
If you’re currently leasing from a third party, explore purchasing the building through a separate entity. The rent payments become deductible to the practice while generating tax-advantaged income personally.
Income Timing: Play the Calendar
With flat tax rates expected in 2025 and 2026, the general strategy is to accelerate deductions into 2025 and defer income into 2026. For production-based practices, delay billing December production until early January. For fee-for-service practices with significant accounts receivable, consider whether accelerating collections makes sense given your specific tax situation.
Associate compensation and production bonuses present another timing opportunity. Structure agreements so year-end bonuses are paid in January 2026, pushing the deduction into the following year when you might be in a higher bracket or have fewer other deductions available.
Practice Transitions: January vs. December
If you’re planning to sell your practice, timing matters enormously. Sales structured as asset sales generate ordinary income on equipment and goodwill, while stock sales may qualify for capital gains treatment. The difference between selling December 31, 2025, and January 2, 2026, can shift hundreds of thousands of dollars of income between tax years.
Additionally, consider how the sale interacts with your lifetime estate and gift tax exemption of $15 million per person. Gifting practice interests to family members before a sale can shift future gains to lower-bracket beneficiaries.
Audit Defense: Document Everything
IRS audit frequency is rising with modernization initiatives. Every deduction must have substantiation—receipts for expenses, mileage logs for vehicles, loan documentation for interest deductions, and contemporaneous records for entertainment expenses.
For dental practices, maintain detailed records of continuing education (including the business purpose), equipment purchases (with proof of business use), and home office expenses (with square footage calculations and exclusive use documentation). Being aggressive is acceptable; being unprepared is not.
Final Thoughts: Strategic vs. Reactive Planning
The most successful dental practice owners view tax planning as a year-round strategic initiative, not a December scramble. However, year-end remains the critical checkpoint where proactive decisions create lasting value.
Focus on strategies that serve both your economic goals and your tax position. Don’t buy equipment you don’t need just for the deduction. Don’t pre-pay expenses if it strains cash flow. And don’t make gifts or charitable contributions that compromise your financial security.
The best tax strategies are those that align with your practice growth objectives, wealth-building goals, and long-term vision. With the right planning and execution, you can enter 2026 with both a lower tax bill and a stronger financial foundation.
Take Action Before December 31st
The year-end deadline isn’t just approaching—it’s the difference between proactive tax savings and missed opportunities. With expiring credits, new deduction caps on the horizon, and powerful depreciation rules in effect, the strategies you implement in the next few weeks will impact your tax bill for years to come.
At Dental CPA, we specialize exclusively in helping dental practice owners navigate these complex decisions. We don’t just prepare returns—we architect comprehensive tax strategies that align with your practice growth, wealth-building objectives, and long-term vision. Contact us today to schedule a consultation and maximize your savings.