Buying Your Building vs Leasing: The Operator Math

A $195,000 down payment is the largest single check most practice owners will ever write, and in year one that building will hand back roughly $16,000, none of it in cash. That isn't a scandal. It's just arithmetic almost nobody runs before the broker's email turns into a signed purchase agreement.

Our view: if your operatories aren't full, buying your building is the lowest-return use of your next $195,000, and the fact that it feels like wealth-building is exactly what makes it expensive. Buy chairs before you buy walls. Plenty of good operators will disagree, and the three cases where they're right are laid out below. But the default advice at every study club and every lender's lunch-and-learn runs the other direction, and the default advice is wrong for the median practice.

Only About 62 Cents of Your Down Payment Buys Real Estate

Start with the actual deal structure, because the financing vehicle shapes the decision more than the real estate does. SBA 504 loans cap at $5.5 million, come in 10-, 20- and 25-year terms, and explicitly cannot be used for "speculation or investment in rental real estate." Owner-occupancy isn't a preference, it's a condition. That single rule is why dental building purchases get financed at terms a passive investor can't touch, and why the government is effectively subsidizing your decision to tie your clinical business to one parcel of land.

A representative project: IM504 publishes a sample dental 504 deal totaling $1.95 million, split as $1.2 million for the building, $400,000 for buildout and $350,000 for equipment, financeable with as little as 10% down, about $195,000 of equity, versus 15% under startup provisions. Note what's in that bundle. The building is 62% of the project cost. So of a $195,000 equity check, roughly $120,000 is buying real estate and roughly $75,000 is buying cabinetry, chairs and a compressor you'd have paid for under a lease anyway.

If you're buying a practice at the same time and land in the 15% startup bucket, the equity requirement goes to $292,500, an extra $97,500 of cash out the door in the same quarter you're meeting a new staff for the first time.

Running the $1.95 Million Deal All the Way Down

Here's the part that gets skipped. What does the real estate actually earn?

Medical office buildings traded at cap rates of 5.5% to 8.5% in Q1 2026, averaging about 6.3% for institutional-quality properties. Apply that to a $1.2 million building and the property throws off about $75,600 a year of net operating income. That's $6,300 a month, which is also roughly what you'd pay in net rent for the same box. Owning it doesn't create that $75,600. It just redirects it from a landlord to you.

Now the debt. Finance 90% of the building and you're carrying $1,080,000. At 7% on a 25-year amortization, that's about $7,633 a month, or $91,596 a year of debt service. First-year interest runs about $75,600. Which means the building's net operating income covers the interest and essentially nothing else: you're out of pocket about $16,000 in year one, and that $16,000 goes to principal.

So the honest scorecard on the real estate slice: $120,000 of equity, zero cash flow, $16,000 of forced savings. Call it a 13% return on equity before any appreciation, before capital expense, before a single vacant month. That's not a bad number. It's a real number. Hold that thought.

Against it, put the alternative use of the same cash. Among general practices in The Dental Signal Practice Market Index, collections per operatory run a median of $201,544, with the middle half between $148,031 and $266,667 (n=734). Those are practices listed for sale, the asking side of the market, not a census of all practices, but they tell you what a working chair produces in the real world. Suppose you add one operatory and run it at half the median, $100,772 of new collections. Assume the incremental work carries 60% cost, mostly hygiene wages and lab, leaving $40,309 of contribution. On a $195,000 all-in spend that's a 20.7% return, in cash, in year one.

Thirteen percent of forced savings on an illiquid asset versus twenty percent in cash on an asset you already know how to run. That's the trade, and the spread is about $28,000 a year on the same capital. We'd take the chair.

What Most Owners Get Wrong: Treating Rent as Money Burned

The specific mistake is this sentence, and you've heard a version of it: "I'm paying $6,300 a month to a landlord, I may as well pay myself." It sounds like thrift. It's a category error. Rent buys occupancy. A mortgage buys occupancy plus a separate investment in a single-tenant commercial property with one tenant, who is you, in a trade whose ownership base is shrinking. Those are two decisions wearing one signature.

Who makes it: mid-career single-location owners at year eight to twelve, usually prompted by a lease renewal, a lender's seminar or a landlord who finally decides to sell. And more dangerously, the first-time buyer stacking a practice acquisition and a building purchase into the same 90 days because the 504 will finance both. The second group is paying 15% down, carrying new practice debt, and learning staff names while a roof budget they've never modeled sits on their balance sheet.

The tell is a pro forma with no line for capital expense, no vacancy assumption, and no charge for your own time as a property manager. A building is a second business that happens to share your parking lot. Price it like one.

Three Situations Where We'd Buy Without Blinking

The thesis has edges. Buy when:

• You're genuinely full. If the chairs are booked, the schedule is tight and the next operatory has nowhere to go, the 20% alternative return doesn't exist. Capital with no clinical use should go into the hardest asset you can control. The median practice listed in our index has 5 operatories (middle half 4 to 7, n=857); if you're at seven and running them, you're in a different conversation than someone at four.
• Your lease is a hostage situation. A landlord with a redevelopment plan, a demolition clause, or a five-year term and no renewal option controls the resale value of your practice, not you. Buying is sometimes just the cost of removing a single point of failure.
• The build you need won't happen on someone else's property. If growth requires $400,000 of plumbing, panel upgrades and a CBCT bay, and the landlord won't amortize it into rent at a sane rate, you'll be funding a capital improvement on an asset you don't own. That's the worst version of leasing.

Notice none of those three reasons is appreciation. If appreciation is the headline argument in your pro forma, you're buying a market view, not a practice decision.

The Four Clauses Worth More Than Appreciation

If you lease, the money is made in the document, not in the rate per square foot. Four items pay for themselves many times over:

• Assignment and change-of-control. Your lease must transfer to a buyer on terms a lender will accept. A landlord consent clause with no standard attached is a veto over your exit.
• Renewal options with a defined rent mechanism. "Market rate at renewal" is not a term, it's an invitation. Cap the escalator.
• No demolition or relocation clause. Strike them. If the landlord won't, you've learned what the building is actually for.
• Right of first refusal to purchase. Costs nothing today, and it's the clause that converts a leaser into an owner on your schedule instead of theirs.

Get those four and a 10-year term, and the gap between leasing and owning narrows to a financing preference. Miss them and your practice is worth less than your production says it is.

When You Sell the Practice, You Become a Landlord

This is the piece the buy-side math usually ignores. Owner-occupancy is what made the 504 work, and the day you sell the practice, you stop occupying. Now you own a single-tenant medical building leased to the person who just bought your patient base, and your retirement income depends on their collections.

That tenant pool is thinning. Fewer than 1 in 10 dentists under 30 were practice owners as of 2021, and among dentists aged 30 to 34 ownership fell from more than half in 2005 to about one-third, according to the ADA Health Policy Institute. The Bureau of Labor Statistics counts 12% of dentists as self-employed against 78% working in offices of dentists, out of 161,400 dentist jobs in 2025. Meanwhile there are 1,043 practices currently listed for sale in our Practice Market Index, with median collections of $1,000,000 (middle half $659,684 to $1,500,000, n=857). Supply of practices on the market, shrinking supply of individual buyers, and your building's income sitting on top of that stack.

Which doesn't mean don't buy. It means underwrite the building to a group-practice tenant at market rent, not to a sentimental successor at the rent you were charging yourself.

What Would Change Our Mind

Two things. If medical office cap rates keep climbing toward the top of that 5.5% to 8.5% band while 504 debt stays long and fixed, the spread between what a building yields and what it costs to carry widens in the owner's favor, and the forced-savings math starts beating a half-filled operatory. And if collections per operatory in our index drift down, the 20% alternative return we just used gets softer, which strengthens the case for the hard asset. We're tracking both quarterly. Tell us what your actual occupancy cost is as a share of collections, because that's the number that settles this per practice.

Do This Before Your Next Lease Anniversary

Pull your lease this week and find three things: the expiration date, the assignment clause and whether a demolition or relocation clause exists. Then calculate your occupancy cost as a percentage of collections and your collections per operatory, and if that second number is below roughly $150,000 you have a capacity problem, not a real estate problem. If your lease has under four years left with no renewal option, call the landlord before they call you. If it has eight years, a clean assignment clause and a right of first refusal, do nothing and go buy a chair.

You don't get paid for owning the walls. You get paid for what happens between them, and occupancy cost is one of the fastest overhead lines to misjudge, because it looks fixed until the day it isn't. Put your rent or mortgage, collections and operatory count into our overhead benchmark and run your own numbers against practices your size before you sign anything with a 25-year amortization on it.