You spent years mastering dentistry. Nobody handed you a course on retirement planning, entity structure, or how to keep more of what your practice earns. That gap is not a personal failing. It is just the reality of clinical training, and it costs a lot of Washington dentists more than they realize.
The good news: your retirement plan is one of the most powerful tools available for reducing your current-year dentist taxes while building real, long-term wealth. The catch is that it only works that way when it is set up correctly, timed well, and connected to the rest of your tax strategy. A plan that sits in isolation, reviewed once a year in December, is not doing its full job.
Here we walk through the main retirement plan options for dental practice owners, how to choose the right one for your situation, and why working with a dental tax specialist changes what is actually possible.
You will learn:
- The key retirement plan types available to dental practice owners and how they compare
- How practice income, entity structure, and owner age affect which plan makes sense
- Why timing contributions alongside equipment purchases and quarterly tax reviews matters
- How year-round planning with business tax specialists protects more of what you earn
Retirement Plan Options for Dental Practice Owners
Not all retirement plans are built the same, and the right one depends heavily on your practice structure, income level, and goals.
SEP-IRA. This is the simplest option to set up and maintain. Employer contributions can reach up to 25% of compensation, and there is very little administrative burden. For a solo practice owner who wants a straightforward way to reduce taxable income without managing a complex plan, a SEP-IRA is often the starting point. The trade-off is that if you have employees, you generally have to contribute for them at the same percentage rate you contribute for yourself.
Solo 401(k). For owner-only practices, the Solo 401(k) allows higher combined contribution limits than a SEP-IRA because you can contribute as both employer and employee. It also offers a Roth option, which adds tax diversification: contributions go in after-tax, but qualified withdrawals in retirement are tax-free. That flexibility can matter a great deal depending on where you expect your tax rate to land in retirement.
Defined benefit and cash balance plans. These plans allow significantly larger annual contributions than either a SEP-IRA or a 401(k), which makes them particularly valuable for high-earning dentists who are closer to retirement and want to shelter as much income as possible in the years they have left. The administrative requirements are more involved, and actuarial calculations are required, but the potential deduction can be substantial depending on your age and income.
Backdoor Roth strategies. When your adjusted gross income exceeds the IRS threshold for direct Roth IRA contributions, a backdoor Roth conversion allows you to still access Roth benefits. This involves making a non-deductible traditional IRA contribution and then converting it. It is a useful tool for high-earning practice owners who want tax-free growth in retirement, but the mechanics require careful execution to avoid unintended tax consequences.
Choosing the Right Plan for Your Practice
There is no universal answer here, and that is exactly the point. The right plan depends on your practice income, your age, how many employees you have, and whether your priority right now is maximizing current-year deductions or reinvesting in the practice.
Entity structure plays a bigger role than most dentists expect. An S-corp owner can split income between a reasonable salary and business distributions, paying self-employment taxes only on the salary portion. That split also affects how retirement contributions are calculated, because contribution limits for many plans are tied to compensation. An LLC taxed as a sole proprietorship, by contrast, is generally subject to self-employment tax on the full practice income, which changes the math considerably.
Getting the salary and distribution balance right in an S-corp matters. Paying yourself too little to minimize self-employment taxes can trigger audit risk and IRS scrutiny. A dental tax specialist can help you find the defensible, strategic middle ground that holds up and still reduces what you owe.
Balancing retirement contributions against reinvesting in the practice is also a real consideration. Maximizing contributions every year is not always the right move if the practice needs capital for growth, equipment, or staffing. The goal is a coordinated plan, not just the largest possible deduction in isolation.
Timing Retirement Contributions with Other Tax Moves
Retirement contributions do not exist in a vacuum. The dentists who get the most out of them are the ones who coordinate them with everything else happening in the practice that year.
Equipment purchases are a prime example. For qualified property acquired after January 19, 2025, IRS Publication 334 confirms a 100% additional first-year depreciation deduction is available. The maximum Section 179 expense deduction for 2025 is generally $2.5 million, reduced when the cost of Section 179 property placed in service exceeds $4 million. Stacking a large equipment deduction and a maximum retirement contribution in the same year without a cash-flow forecast can create problems. Planned together, they can work in your favor.
Adding an associate or partner changes the retirement plan math in ways that catch a lot of practice owners off guard. Certain plan types require employer contributions for eligible employees, which affects both the cost and the structure of the plan. That kind of transition needs to be planned in advance, not addressed after the hire is made.
Quarterly estimated tax reviews are where a lot of this coordination actually happens. Basing your estimates on last year’s numbers instead of current-year profitability means you are always reacting rather than planning. Reviewing actual practice performance each quarter lets you adjust contributions, time deductible expenses, and avoid underpayment penalties before the year closes.
Why Year-Round Planning Beats a Year-End Scramble
The dentists who keep the most of what they earn are not the ones who call their accountant in December. They are the ones who treat tax strategy as a year-round discipline.
PorterKinney’s tax planning article for Washington dentists makes this point directly: strategic decisions about retirement contributions, equipment purchases, and major practice investments need months of runway, not days. Last-minute retirement decisions made in isolation often cost more than they save, either through missed deductions, poor timing, or cash-flow strain.
Year-round planning also connects retirement strategy to the broader health of the practice. PorterKinney’s benchmarking article shows how financial metrics like net profit margin, overhead ratios, and revenue per chair give practice owners a clear picture of where the practice stands relative to industry benchmarks. That context matters when you are deciding how much to contribute to a retirement plan versus reinvesting in growth.
Looking ahead to 2026, a few regulatory changes are worth noting. The SALT deduction cap increased to $40,000 for 2025 and rises to $40,400 for 2026, with phaseout rules above a $500,000 modified AGI threshold. The estate tax basic exclusion amount for 2026 is $15,000,000. The qualified business income deduction has been made permanent for qualified active trades or businesses, with updated limitation thresholds. These shifts may reshape how retirement contributions interact with your broader tax picture, which is exactly why having a dental tax specialist reviewing your strategy before year-end matters.
A generalist accountant can file a return. A dental tax specialist understands dental billing, overhead structure, insurance reimbursements, and the specific deductions and strategies that apply to your practice. That difference shows up in what you actually keep.
What PorterKinney Does Differently
PorterKinney is a CPA firm and business advisory practice based in Kennewick, Washington, serving dental practice owners across the state. Their work with dentists goes well beyond tax filing. It includes strategic tax planning, benchmarking, coaching, payroll, bookkeeping, entity selection, and business valuation, all connected to a single goal: helping practice owners build a profitability roadmap that works year-round.
For dental practice owners in the Tri-Cities area and across Washington, PorterKinney brings the kind of specialized expertise that connects retirement planning to entity structure, equipment decisions, overhead management, and long-term practice value. That is the difference between a tax return and a real strategy.
Find Out What Your Retirement Plan Is Actually Doing for You
Not sure your retirement plan and tax strategy are actually working together? PorterKinney offers a complimentary review of your most recent return to identify savings opportunities heading into 2026. Schedule your free consultation today and find out what a dental tax specialist can do for your practice.
Contact PorterKinney at 509-713-7300, email info@porterkinney.com, or visit porterkinney.com to get started.
