Why Tax Planning Matters for Your Practice Sale
Selling your dental practice represents one of the largest financial transactions of your career. After decades of building your patient base, investing in equipment, and developing your team, the sale proceeds can seem like a well-deserved reward. But without careful tax planning, a significant portion of that wealth can disappear to federal and state tax authorities before you ever see it.
The difference between good and poor tax planning on a practice sale can easily amount to six figures. On a $1.5 million sale, the gap between an optimally structured transaction and a poorly structured one can exceed $300,000 in total tax liability. This is not money you have to lose—it is money you can keep with the right preparation, the right advisors, and the right structure.
Tax planning for a practice sale cannot begin when you sign the purchase agreement. By that point, most of your options have expired. The most effective strategies require a runway of two to five years to implement fully. Entity structure decisions made when you started your practice, depreciation methods chosen years ago, and personal goodwill documentation maintained over decades all influence your tax outcome at sale.
This guide covers every major tax consideration for dental practice sales. Whether you are actively planning a transition or simply want to understand the landscape for future planning, the concepts here will help you make informed decisions and have productive conversations with your CPA and transaction team.
Dentists who engage in comprehensive tax planning 2–3 years before selling typically retain 15–25% more of their sale proceeds after taxes compared to those who begin planning after signing a letter of intent.
Capital Gains vs. Ordinary Income: The Critical Distinction
The single most important concept in practice sale taxation is the difference between capital gains and ordinary income. This distinction determines not just your tax rate, but potentially hundreds of thousands of dollars in actual tax liability.
Long-term capital gains—profits from the sale of assets held longer than one year—are taxed at preferential federal rates of 0%, 15%, or 20%, depending on your total income. For high-earning dentists, the top federal capital gains rate is 20%. Ordinary income, by contrast, is taxed at marginal rates up to 37% federally. State taxes add another layer, with some states taxing capital gains at ordinary income rates while others offer preferential treatment or no income tax at all.
On a $1 million gain, the difference between 20% capital gains treatment and 37% ordinary income treatment is $170,000 in federal taxes alone. When you add the 3.8% Net Investment Income Tax that may apply to certain passive income, and state taxes that can reach 13.3% in high-tax states, the total difference can approach $350,000 or more.
Whether your sale proceeds qualify for capital gains treatment depends entirely on how the assets in your practice are categorized and how the transaction is structured. Unlike selling a share of stock, where the characterization is straightforward, selling a dental practice involves allocating the purchase price across multiple asset classes, each with its own tax treatment. This allocation is negotiated between buyer and seller and documented on IRS Form 8594—and it is where tax outcomes are won or lost.
Asset Allocation: Where Tax Outcomes Are Determined
When you sell a dental practice, the IRS requires both buyer and seller to file Form 8594, which allocates the total purchase price across seven categories of assets. Each category carries a different tax treatment for the seller, and the allocation between categories is subject to negotiation. This is not a mechanical exercise—it is a strategic negotiation with significant financial consequences.
| Asset Class | Common Examples | Seller's Tax Treatment |
|---|---|---|
| Class I: Cash & Receivables | Bank accounts, accounts receivable | Ordinary income (no gain/loss on cash) |
| Class II: Securities | Stocks, bonds (rare in practice sales) | Capital gains |
| Class III: Inventory | Dental supplies, materials | Ordinary income |
| Class IV: Tangible Assets | Equipment, furniture, computers | Ordinary income (depreciation recapture) |
| Class V: Intangible Assets | Covenants not to compete | Ordinary income |
| Class VI: Goodwill | Practice goodwill, patient relationships | Long-term capital gains |
| Class VII: Personal Goodwill | Individual reputation, relationships | Long-term capital gains |
As the seller, your objective is to allocate as much of the purchase price as possible to assets that generate long-term capital gains—primarily goodwill and personal goodwill. The buyer, conversely, typically wants allocation toward depreciable assets like equipment and leasehold improvements because those generate ordinary income deductions through depreciation that the buyer can use immediately.
This creates a natural tension in negotiations. A buyer pushing to allocate $200,000 to equipment rather than goodwill may be trying to optimize their tax deductions—but that reallocation could cost you $40,000 or more in additional taxes. Understanding these tradeoffs allows you to negotiate from a position of knowledge and to recognize when a buyer's proposed allocation is reasonable versus when it is aggressively favoring their interests at your expense.
Covenants not to compete deserve special attention. Buyers frequently want to allocate significant purchase price to non-compete agreements because they can amortize this cost over 15 years. But for sellers, non-compete payments are taxed as ordinary income, not capital gains. A $150,000 allocation to a covenant rather than goodwill can cost you $25,000 to $40,000 in additional taxes. This does not mean you should refuse all non-compete allocations—they serve legitimate business purposes—but you should understand the tax cost and negotiate accordingly.
Asset allocation is not determined by the IRS—it is negotiated between buyer and seller. Both parties must report the same allocation on Form 8594, which means you have leverage to push for allocations that favor your tax position. Never accept a buyer's proposed allocation without reviewing the tax impact with your CPA.
Personal Goodwill: Your Most Powerful Tax Strategy
If there is one concept that sophisticated dental tax advisors emphasize more than any other, it is personal goodwill. The IRS and federal courts have long recognized that in professional service businesses like dental practices, a significant portion of the practice's value is tied to the individual practitioner—their clinical skills, their patient relationships, their reputation in the community. When properly structured and documented, the sale of personal goodwill can be treated as long-term capital gains, even in situations where practice goodwill would face less favorable treatment.
Personal goodwill is distinct from practice goodwill. Practice goodwill belongs to the entity—the corporation or partnership that owns the practice. Personal goodwill belongs to you as an individual. The distinction matters enormously for tax purposes, particularly for dentists practicing in C-corporations.
C-corporation owners face a unique challenge: when a C-corp sells its assets, the corporation pays tax on the gain at the corporate level (21% federal), and then the shareholder pays tax again when the proceeds are distributed as dividends or capital gains. This double taxation can consume 40% or more of the total gain. However, if a portion of the practice value is properly characterized as personal goodwill belonging to the shareholder individually, that portion can be sold directly by the shareholder—bypassing the corporation entirely and avoiding double taxation.
Personal goodwill claims must be defensible. The IRS will scrutinize whether the goodwill is truly personal or whether it has been transferred to the corporation through employment agreements, non-solicitation clauses, or other contractual arrangements. Courts have allowed personal goodwill claims where the dentist had unique relationships with patients, where the practice name was the dentist's personal name, and where the dentist had not assigned their personal goodwill to the corporation. Conversely, personal goodwill claims have been denied where employment contracts contained broad assignment clauses or where the practice was heavily branded around a corporate identity rather than the individual dentist.
The time to establish personal goodwill is years before a sale. Your CPA and attorney should review employment agreements, shareholder agreements, and practice branding to ensure they support rather than undermine a future personal goodwill claim. Documentation of patient relationships, referral sources, and community reputation should be maintained. The investment in proper structuring can yield six-figure tax savings at sale.
Depreciation Recapture: The Hidden Tax Liability
Many dentists are surprised to discover that equipment they have fully depreciated can still generate a significant tax liability at sale. This is depreciation recapture—a mechanism by which the IRS "recaptures" prior depreciation deductions and taxes them as ordinary income when the asset is sold for more than its depreciated book value.
Under Internal Revenue Code Section 1245, when you sell depreciable personal property (equipment, computers, furniture) for more than its adjusted basis, the gain is treated as ordinary income to the extent of prior depreciation deductions. If you purchased a CBCT machine for $120,000 and claimed $120,000 in depreciation over five years, your adjusted basis is zero. If the buyer allocates $80,000 of the purchase price to that machine, the entire $80,000 is recaptured as ordinary income—taxed at rates up to 37% plus state taxes.
Real property improvements are subject to similar but distinct rules under Section 1250. If you own your building or have made significant leasehold improvements, depreciation on those assets is recaptured at a special 25% federal rate—higher than the general long-term capital gains rate but lower than ordinary income rates.
The depreciation recapture rules create important strategic considerations for pre-sale planning. If you are within two to three years of a planned sale, large equipment purchases that generate new depreciation deductions may be unwise—not because the deductions are bad, but because they create future recapture liability. Your CPA can model the tradeoff between current deductions and future recapture to determine the optimal timing of capital expenditures.
Understanding your depreciation schedule before entering negotiations is essential. A buyer's proposed asset allocation that heavily weights equipment may serve their tax interests (by giving them depreciable basis) while costing you significantly in recapture taxes. Armed with your depreciation schedule, you can push back on allocations that disproportionately allocate value to fully depreciated assets.
Depreciation recapture income must be recognized in the year of sale, even if you structure an installment sale to defer other gains. You cannot spread recapture taxes over multiple years—plan accordingly for the cash flow impact.
Installment Sales: Spreading the Tax Burden Over Time
An installment sale—where the buyer pays the purchase price over several years rather than in a lump sum at closing—is one of the most effective tools for managing the tax impact of a practice sale. Under IRC Section 453, you recognize gain proportionally as you receive payments, rather than recognizing the full gain in the year of sale. This can keep you out of higher tax brackets, defer taxes into years when your other income may be lower, and spread the tax burden across time.
Consider a practice selling for $1.8 million with a total gain of $1.2 million after basis adjustments. If you receive the full amount at closing, the entire $1.2 million gain is taxed in year one. Depending on your other income, a substantial portion may fall into the 20% capital gains bracket and trigger the 3.8% Net Investment Income Tax. If instead you structure the sale as a five-year installment note receiving $360,000 annually, you spread the gain across five tax years. If you retire or reduce your income in those years, the effective tax rate on the gain can be substantially lower.
Installment sales carry risks that must be managed. You are essentially extending credit to the buyer, which means you bear default risk if the buyer's practice struggles or fails. The note should be secured by the practice assets, a personal guarantee from the buyer, or both. You should also require adequate interest—the IRS mandates that installment notes carry at least the Applicable Federal Rate (AFR), which is published monthly and varies based on term length.
The interest you receive on an installment note is taxable as ordinary income each year, which partially offsets the benefit of deferring the capital gains. Additionally, if the buyer sells the practice or transfers it to a related party, the installment obligation may be accelerated, triggering immediate recognition of the remaining gain. These provisions should be addressed in the purchase agreement.
Despite these complexities, installment sales remain a valuable tool for many practice sellers—particularly when the buyer is a trusted associate or when the tax savings from deferral and bracket management are substantial. The key is structuring the note carefully, securing it appropriately, and modeling the total after-tax outcome under both lump-sum and installment scenarios.
Entity Structure and Its Tax Consequences
Whether your practice is structured as a sole proprietorship, S-corporation, or C-corporation has profound implications for how the sale is taxed. The structure determines whether you can sell stock versus assets, how gains flow through to your individual return, and whether you face double taxation.
C-Corporations: The Double Taxation Challenge
C-corporation owners face the harshest tax treatment on asset sales. When a C-corp sells its assets, the corporation pays corporate-level tax on the gain at 21% federal. The remaining after-tax proceeds are then distributed to shareholders and taxed again as dividends (at rates up to 20%) or capital gains. This double taxation can consume 40% or more of the total gain before state taxes.
For example, on a $1 million corporate gain: the corporation pays $210,000 in tax (21%), leaving $790,000. If distributed as dividends, the shareholder pays up to $158,000 more (20%), leaving only $632,000—before state taxes. The same gain in a pass-through entity might generate only $200,000 to $240,000 in total federal tax.
C-corp owners should consult with their CPA well in advance of a sale about potential strategies. An S-corporation election can eliminate future double taxation, but the "built-in gains tax" may apply for five years after conversion, taxing gains that existed at the time of conversion at the corporate level.
S-Corporations and Sole Proprietorships
S-corporations and sole proprietorships generally avoid double taxation. Gains flow through to the owner's personal return and are taxed once. S-corp shareholders may also have a basis adjustment in their shares that can offset gain, though the rules here are nuanced and depend heavily on your specific situation.
An S-corp stock sale—rather than an asset sale—is sometimes achievable and can simplify the tax picture significantly for the seller. However, buyers often resist stock purchases because they don't get a step-up in asset basis, which reduces their future depreciation deductions. Whether a stock sale is feasible depends on the buyer's financing, the practice's liability profile, and negotiation dynamics.
State Tax Considerations
Federal taxes are only half the picture. State income taxes on the sale of a dental practice vary dramatically depending on where you live and work. California, for example, taxes capital gains as ordinary income with a top rate of 13.3%, bringing the combined federal and state rate on a capital gain above 33%. States like Florida, Texas, and Nevada impose no state income tax, making them dramatically more favorable for sellers.
For dentists practicing near a state border, or those who split their time between states, determining which state has the right to tax the income from your practice sale can be genuinely complex. Some states follow a "source income" rule that taxes nonresidents on income derived from business activity within the state—meaning even if you've moved to a no-tax state before the sale, your former home state may still assert a claim on the gain.
Residency planning and domicile changes, if done well in advance of a sale, can legitimately reduce state tax exposure. However, they must be carefully executed to withstand scrutiny. Changing your driver's license the week before closing is not a defensible strategy. Courts and state tax authorities look at factors like where you spend your time, where your family lives, where you're registered to vote, and where you maintain your primary social connections.
Multi-state practices add another layer of complexity. If your practice operated locations in more than one state, or if your entity was formed in a state different from where you practiced, you may face apportionment issues. Each state will want to tax its portion of the gain, and the formulas used to calculate apportionment vary. This is an area where a CPA with specific multi-state experience is essential.
Pre-Sale Tax Planning Strategies
The most effective tax strategies for a dental practice sale cannot be implemented in the 30 days before closing. Many require years of advance planning. Here are the key strategies to consider:
Maximize Retirement Contributions
Contributing to defined benefit plans, SEP-IRAs, or 401(k)s can shelter substantial income from current taxation. Some dentists within five years of sale can contribute $100,000 to $250,000 annually to defined benefit plans depending on age and income.
Review Entity Structure
If you're in a C-corp, explore S-corp conversion timing. If you're a sole proprietor, consider whether an S-corp structure might offer benefits. These changes often require multi-year planning windows.
Document Personal Goodwill
Ensure employment agreements don't assign personal goodwill to the corporation. Maintain documentation of your individual patient relationships and community reputation.
Optimize Equipment Purchases
Within 2-3 years of sale, avoid large equipment purchases that create depreciation recapture liability. Time capital expenditures strategically.
Clean Up Financials
Work with a dental-specific CPA to normalize your financial statements. Eliminate personal expenses, document one-time costs, and ensure clean 3-year P&L history.
Consider Residency Planning
If you're in a high-tax state and have flexibility, legitimate residency changes to no-tax states can save substantial sums—but must be done properly and in advance.
Deferral Strategies: Opportunity Zones and 1031 Exchanges
Beyond installment sales, there are additional mechanisms worth discussing with your CPA depending on your situation.
Qualified Opportunity Zones (QOZ)
Qualified Opportunity Zone investments allow you to defer and potentially reduce capital gains by reinvesting gains into designated opportunity zone funds within 180 days of a sale. While QOZ rules are complex and the investments are illiquid, they can be useful deferral tools for dentists with large capital gains who are comfortable with a multi-year holding period and the associated risks.
The basic structure: you reinvest your capital gain into a Qualified Opportunity Fund within 180 days. The tax on the original gain is deferred until December 31, 2026, or until you sell the QOZ investment, whichever comes first. If you hold the QOZ investment for at least 10 years, any appreciation on the QOZ investment itself is tax-free.
1031 Exchanges
If you own appreciated real estate—perhaps the building your practice occupies—a 1031 exchange can defer capital gains taxes by rolling the proceeds directly into a like-kind property. This doesn't help with the practice goodwill sale, but for the real property component of a practice transition it can be a powerful tool. Combining a 1031 exchange on the real estate with a careful goodwill allocation on the practice assets can meaningfully reduce your total tax bill at closing.
1031 exchanges have strict timing requirements: you must identify replacement property within 45 days of the sale and complete the acquisition within 180 days. Working with a qualified intermediary is essential, as taking constructive receipt of the proceeds disqualifies the exchange.
Common Tax Mistakes to Avoid
Even financially sophisticated dentists make predictable errors when selling their practices. Here are the most costly ones:
Waiting too long to engage tax advisors. Many sellers don't bring their CPA into the conversation until after a letter of intent has been signed—by which point the asset allocation may already be largely settled. A CPA who joins after the LOI is primarily in damage-control mode. One who joins in year one of a three-year plan can meaningfully change the outcome.
Accepting the buyer's proposed asset allocation without analysis. Buyers and their advisors are sophisticated—they will push allocation toward depreciable assets because that serves their tax interests. Understanding the dollars at stake gives you leverage to negotiate.
Failing to account for the Net Investment Income Tax. The NIIT imposes an additional 3.8% tax on certain investment income for taxpayers above specific thresholds. Whether it applies to your practice sale proceeds depends on whether you were materially participating in the practice. Most practicing dentists qualify as materially participating, which means the NIIT should not apply—but this should be explicitly evaluated and documented, not assumed.
Neglecting state tax implications. A dentist who moves from California to Nevada the month before closing, without properly establishing Nevada domicile, may find themselves paying California taxes anyway—and potentially facing penalties for underpayment.
Confusing gross sale price with after-tax proceeds. The headline number in the purchase agreement is not what you walk away with. Broker fees (8-12%), tax liability, loan payoffs, and transition costs all reduce net proceeds. Understanding the difference is essential for retirement planning.
Working With the Right Dental CPA
The right CPA for a dental practice sale is not necessarily the one who has handled your annual tax returns for the last decade. Practice transitions involve a specialized intersection of business valuation, entity structure, asset allocation negotiation, installment note structuring, and multi-year planning. You want an advisor who has done this dozens or hundreds of times.
Look for CPAs who hold credentials from the American Society of Appraisers (ASA) or have demonstrated specialization in healthcare or specifically dental practices. Dental-specific CPAs understand the nuances of goodwill versus patient records, associate arrangements, DSO valuation dynamics, and the way lenders underwrite dental acquisitions—general business CPAs often do not.
Ask any CPA you're considering how many dental practice sales they've advised on in the last two years. Ask them to walk you through their framework for asset allocation analysis and pre-sale planning. Ask whether they have relationships with dental practice brokers or transition attorneys. A good dental-focused CPA will not hesitate to answer these questions specifically and will likely have opinions about common mistakes and important planning windows.
Here are the specific questions every dentist should bring to their CPA:
- Given my current entity structure, what is my estimated after-tax net on a sale at my expected price?
- How much of the purchase price do you expect to be subject to ordinary income vs. capital gains rates?
- What are my depreciation recapture exposures, and how do they affect optimal asset allocation?
- Should I consider an installment sale, and what are the risk and reward tradeoffs?
- Are there pre-sale planning moves I should make in the next 12–36 months?
- How does my state handle capital gains from a practice sale, and is there any residency planning worth considering?
- Do I have a defensible personal goodwill position, and is it properly documented?
- What is the NIIT exposure on this transaction, and does my level of participation protect me?
Plan Your Tax Strategy Early
The best time to start tax planning for your practice sale was three years ago. The second best time is today. Use our valuation tool to get a baseline, then connect with a dental-focused CPA to optimize your outcome.
Get Your Valuation Talk to an AdvisorFrequently Asked Questions
How long does a dental practice sale typically take from start to finish?
Most transactions take 6–12 months from the decision to sell through closing and transition. This includes 1–2 months to prepare documentation, 2–4 months of active marketing, 1–2 months of due diligence, and 1–2 months for legal and lender processing. A well-prepared practice with clean financials and a realistic price can move faster; complex situations or financing challenges can extend the timeline.
What is the difference between goodwill and tangible assets in a dental practice sale?
Tangible assets are the physical items—equipment, furniture, instruments, supplies, and leasehold improvements. Goodwill is the intangible value created by your patient relationships, practice reputation, trained staff, and established systems. In most active dental practices, goodwill represents 70–80% of total value. The allocation between goodwill and tangible assets has significant tax implications for both buyer and seller.
How are capital gains from a practice sale taxed?
Long-term capital gains (assets held over one year) are taxed at 0%, 15%, or 20% at the federal level depending on your income. High earners typically pay 20% federal on capital gains. State taxes vary—some states tax capital gains as ordinary income (up to 13.3% in California), while others have no income tax. The Net Investment Income Tax of 3.8% may also apply depending on your participation in the practice.
Can I use an installment sale to defer taxes on my practice sale?
Yes, installment sales under IRC Section 453 allow you to recognize gain proportionally as you receive payments rather than all at once. This can spread the tax burden across multiple years and potentially keep you in lower tax brackets. However, depreciation recapture must still be recognized in the year of sale, and you carry default risk as the creditor. Work with your CPA to model the tradeoffs.
What is depreciation recapture and how does it affect my sale?
Depreciation recapture is the IRS mechanism that taxes prior depreciation deductions as ordinary income when you sell depreciated assets for more than their book value. If you sell equipment for which you've claimed $100,000 in depreciation, up to $100,000 of the sale proceeds may be taxed as ordinary income (up to 37%) rather than capital gains (20%). This applies even if you structure an installment sale.
How does my entity structure (S-corp, C-corp, LLC) affect taxes on sale?
C-corporations face double taxation: the corporation pays 21% on gains, and shareholders pay tax again on distributions. S-corporations and sole proprietorships avoid double taxation—gains flow through to the owner's personal return. S-corp stock sales (rather than asset sales) can simplify taxation but buyers often resist them. Entity structure should be reviewed 3-5 years before a planned sale.
What is personal goodwill and why does it matter?
Personal goodwill is the value of your individual reputation, patient relationships, and clinical skills—distinct from practice goodwill which belongs to the entity. For C-corp owners, selling personal goodwill directly can avoid double taxation since it bypasses the corporation. Personal goodwill must be properly documented and defensible; the time to establish it is years before a sale.
Should I move to a no-tax state before selling my practice?
Residency changes can reduce state tax liability, but they must be done properly and well in advance. Courts look at where you spend time, where family lives, voter registration, and social connections. A move made shortly before closing may not withstand scrutiny, and you could end up paying taxes to both states. Consult a CPA with multi-state experience before making any moves.
How much should I budget for professional fees when selling my practice?
Budget 10-15% of your sale price for total transaction costs. This typically includes: broker fees (8-12%), legal fees ($10,000-30,000), accounting/tax advisory ($5,000-15,000), and other professional services. While these costs are significant, attempting to navigate a seven-figure transaction without specialized guidance often costs far more in the form of suboptimal tax outcomes or deal failures.
When should I start tax planning for my practice sale?
Ideally, 3-5 years before your intended sale. Many tax strategies require multi-year implementation: entity structure changes, personal goodwill documentation, retirement contribution maximization, and residency planning all take time. Even if you're not sure when you'll sell, understanding your current tax position and planning options puts you in a better position when the time comes.
Conclusion
Selling a dental practice is a once-in-a-career event for most dentists. The financial outcome depends not just on the price you negotiate, but on the structure of the deal, the composition of your assets, your entity type, your state of residency, and what you did in the years leading up to signing. Dentists who engage qualified, practice-specific tax advisors early—and who treat tax planning as an integral part of their exit strategy rather than an afterthought—consistently net significantly more from their transitions than those who don't.
The concepts in this guide provide a solid foundation for the conversations you need to have. But every practice, every entity structure, and every transition is different. The specific moves that are right for you depend on details that only a thorough review by a qualified CPA can surface. Use this guide to know what to ask, what to prioritize, and what to watch out for—then get the right people in the room early enough to make a real difference.
Remember: tax planning is not about avoiding taxes—it's about understanding the rules and making informed decisions that align with your overall financial goals. The goal is not to pay zero tax, but to keep as much as legally possible of what you've spent your career building.
Ready to take the first step? Use our Practice Valuation Tool for a data-driven estimate of your practice value, or reach out to our team for guidance on finding a dental-focused CPA who can help optimize your transition.