Let’s say the owner of your dental practice just pulled you aside and said, “Have you thought about buying in?”
That question probably comes with a mix of excitement, anxiety, and a hundred follow-ups.
It’s a big move, and it’s not just about becoming an owner. It’s about making a serious financial investment in something that, up until now, has been your job, not your asset.
If you’re on the fence or just want to be really smart about it, let’s talk through the financial side of a dental practice buy-in.
Especially the stuff no one explains well: valuation, taxes, debt, and long-term return.
First: What Are You Actually Buying?
When someone offers you a buy-in, they’re offering equity or ownership in the business. But that can take different forms. You might be buying shares of a corporation or a percentage of a partnership. The deal could be structured as a stock purchase, a membership interest purchase, or an asset purchase. Each one has different financial and tax implications.
The form matters. Not just for the owner but for you.
Valuation: What Is the Practice Actually Worth?
Before you even think about buying in, you need to understand what you’re paying for and whether it’s fairly priced.
Most dental practices are valued based on EBITDA, which stands for earnings before interest, taxes, depreciation, and amortization. The version that matters is recast (or adjusted) EBITDA — earnings normalized for the owner’s compensation and any personal expenses running through the practice, so you’re pricing the business’s true owner benefit, not an accounting artifact.
That number is multiplied by a factor that reflects the risk and stability of the practice. A well-run, profitable, stable practice commonly trades somewhere around a four to six times multiple of recast EBITDA, though multiples vary with size, payer mix, growth, and whether DSOs are bidding.
Others are valued as a percentage of collections — a rough industry rule of thumb runs 65% to 85%, though it’s a blunter tool than an earnings-based approach.
But don’t take the seller’s word for it. Work with a dental-specific advisory team that can dig into the financials:
- Are collections growing?
- Is overhead in line with industry benchmarks?
- Are key expenses like lab and supplies reasonable?
- Is the doctor-owner taking home too much or too little, skewing net income?
You’re buying into a business. Treat it like one.
And if you’re just starting to explore, we’ve built a simple valuation calculator you can use to get a ballpark idea of what your practice (or your share of it) might be worth. It’s a great way to anchor your thinking before you get into formal appraisals.
Let’s Talk Taxes: How the Deal is Structured Changes Everything
This is where most associates gloss over the details and where they end up overpaying or missing out on thousands in deductions.
Asset Purchase (Usually Better for the Buyer)
In an asset purchase, you’re buying a portion of the business’s actual assets like equipment, patient files, and goodwill. Why does this matter? Because most of these assets can generally be depreciated or amortized over time, reducing your taxable income. The biggest win here is the amortization of goodwill, which is often the largest part of the purchase price.
Let’s say you buy in for $300,000, and $250,000 of that is allocated to goodwill. Under Section 197, you’ll generally be able to amortize that over 15 years, which could mean a deduction of roughly $16,700 a year. That’s real money in your pocket.
Stock or Membership Interest Purchase (Usually Better for the Seller)
If the deal is structured as a stock purchase of a corporation, you’re buying a percentage of the entity itself. In this case, you generally don’t get to amortize goodwill or depreciate anything — you simply own a piece of the pie. That might be fine if the practice is undervalued or poised for big growth, but from a tax perspective, it’s typically less favorable for you. Buying a membership interest in an LLC taxed as a partnership works differently, though: if the entity makes (or already has) a Section 754 election, you can receive a basis step-up under Section 743(b) for what you paid — which effectively recovers much of the goodwill write-off a corporate stock buyer would lose. That election is easy to overlook and hard to fix later, so put it on your pre-signing checklist.
That’s why buyers of corporate stock often try to negotiate an asset purchase structure instead. (You may hear about “deemed asset sale” elections such as Section 338(h)(10) — but those generally require a corporate purchaser acquiring at least 80% of the stock, so they’re rarely available for an individual associate’s minority buy-in.)
Financing the Buy-In: Don’t Just Look at the Sticker Price
So, you know the value and you’re okay with the tax structure. Now let’s talk about how to pay for it.
Most dentists finance their buy-in through bank loans, which can be amortized over 10 to 15 years at whatever practice-lending rates the market is offering — get current quotes from two or three dental lenders rather than anchoring on a number you read online.
The interest is generally tax-deductible, which helps ease the burden.
Sometimes the owner lets you pay in installments, known as seller financing. This can be more flexible but it depends on trust and negotiation.
If you’ve saved enough, great. But cash flow still matters. Owning part of a practice means cash distributions might fluctuate, and you’ll want to make sure you’re not draining your reserves too early.
The key is to forecast your post-buy-in income, not just your current associate earnings. A smart advisor will help you project your annual return after taxes and debt payments.
That’s your real net.
Ongoing Tax Implications of Ownership
Once you’re an owner, the tax landscape changes fast.
How you’re paid usually changes too. In a partnership or LLC, you’ll typically move from W-2 employee to K-1 partner — partners generally can’t be W-2 employees of their own partnership — so nothing is withheld from your pay and quarterly estimated payments become your responsibility. In an S corporation, you’ll usually keep W-2 wages for your clinical work plus a K-1 for your share of profits. Either way, your tax life gets more hands-on.
Many business-related expenses — continuing education, uniforms, supplies, certain meals — can now run through the practice rather than coming out of after-tax pay.
As an owner, you’ll also have a voice in the practice’s retirement plan design. Layering profit sharing or a cash balance / defined benefit plan on top of a 401(k) can meaningfully expand your tax-advantaged savings — and plan design is decided at the practice level, so ownership gives you a seat at that table regardless of your exact percentage.
And depending on how the partnership is structured, you may also be able to influence how profits are distributed, which has major implications for your personal tax planning.
Are You Aligned With the Owner(s)?
Financials aside, you have to ask: do you trust the person you’re buying in with? Do you share a vision for the practice’s future? Are your goals and values aligned?
That’s not just a feel-good question. Misalignment on production expectations, compensation, or management duties can destroy partnerships and the money you’ve invested. It’s also worth asking where the senior owner is headed: if they’re a few years from retirement or fielding DSO offers, your buy-in needs to anticipate that exit, not collide with it.
This is why we always recommend reviewing a detailed buy-in agreement before signing — with a dental-focused attorney for the legal terms, and an advisory team that can look at the tax structure, the financing, and your personal plan as one picture instead of in silos. It should cover how decisions are made, how profits are shared, what happens if one of you wants to sell or retire, and how disputes are handled.
This is more than a handshake deal. It’s a business marriage.
So… Should You Buy In?
There’s no one-size-fits-all answer. But if the financials are solid, the valuation is fair, the tax structure is optimized, and you’re aligned with the current owner, a buy-in can be a powerful wealth-building move.
You’ll go from earning a paycheck to building an asset. From reacting to decisions to helping make them. From renting your career to owning it.
But it only works when the numbers work and when someone’s helping you understand them.
Need An Extra Set Of Eyes?
At Core Advisors, we help dentists navigate the financial side of big decisions like this — and because your practice accounting, tax planning, and personal financial plan sit with one team, the buy-in analysis, the deal structure, and what it means for your own retirement picture happen in one conversation.
Whether you’re trying to understand valuation, structure the purchase in a tax-efficient way, or just want a second opinion before signing anything, we’re here to help.
Simply head over to our Contact Us page to book an introductory call. If we can’t help, we’ll point you in the direction of someone who can.
In the meantime, check out our dental practice valuation calculator to see what the practice might be worth.
Until next time!
This article is for educational purposes only and does not constitute tax, legal, or investment advice. Dollar figures and valuation ranges are approximate examples. Deal structures have significant tax consequences that depend on your specific facts — please consult your own tax and financial advisors before entering any buy-in agreement.
