Here's the commonly cited answer up front: total overhead for a general dental practice is typically quoted at 60–75% of collections. That's a rule of thumb practice owners and consultants use, not a precise industry measurement — but it's the range most "is my overhead normal?" conversations start from.
The definition matters as much as the number. Overhead conventionally means everything the practice spends except doctor compensation — staff, facilities, supplies, lab, equipment, marketing, admin. But definitions vary in practice: some owners count associate salaries as overhead, some run personal benefits through the practice, some fold lab fees into supplies. Each choice moves the percentage by several points, which means two practices quoting different overhead numbers may simply be measuring different things. Before comparing your number to anything, know what your number includes.
This post walks through the major overhead lines in order of typical size, why benchmark comparisons mislead without context, which line you can actually move this quarter, and how to build your own breakdown from a P&L in about half an hour.
What are the major overhead lines in a dental practice?
Ordered by typical size — with numbers only where a range is commonly cited, and honest qualitative description where it isn't.
Staffing — commonly cited as the largest line, roughly a quarter to a third of collections. Wages, payroll taxes, and benefits for the clinical and front-office team. This line dominates every dental overhead conversation for a simple reason: dentistry is delivered by people, chairside, one patient at a time. It's also the line where the "overhead" framing is most dangerous — a strong hygiene team and a competent front office are production engines, not costs to minimize.
Facilities — typically the next-largest line. Rent or mortgage, utilities, maintenance, property costs. Driven almost entirely by decisions made years ago: the market you chose, the square footage you signed for, the lease you negotiated. It changes at renewal or relocation, not in any given quarter.
Lab fees — vary widely with case mix. A crown-and-bridge or denture-heavy practice carries a substantial lab line; a prevention-heavy practice barely has one. In-house milling shifts the cost from lab to equipment and materials rather than eliminating it. Because lab spend tracks the dentistry being done, there's no meaningful universal percentage — and lab fees getting mixed into the supplies line is one of the most common bookkeeping distortions in overhead math.
Clinical supplies — commonly cited at 5–8% of collections. Gloves, anesthetic, impression and restorative materials, sterilization products — the consumables of care. One of the smaller lines, but a distinctive one, for a reason the next sections come back to: it's the line most responsive to short-term management. We've covered the supply line in depth — what's normal, how to calculate yours, what high and low numbers mean — in how much a dental practice should spend on supplies.
Equipment and technology — lumpy rather than steady. Chairs, imaging, software, IT. Much of it is capital expense that shows up as depreciation or financing payments rather than a clean monthly cost, which makes it easy to misread on a P&L. The honest description is that it arrives in waves tied to replacement cycles and technology decisions.
Marketing — varies with growth stage. A mature practice with a full book referred by patients spends little; a startup or a practice rebuilding after a transition spends meaningfully. There's no "normal" number without knowing which situation you're in.
Insurance, professional fees, and administrative costs. Malpractice and business insurance, accounting, legal, licenses, merchant fees, subscriptions. Individually small, collectively real, and prone to quiet accumulation — the software subscription nobody cancelled is a cliché because it's true.
Why does comparing your overhead to a benchmark mislead?
A benchmark range answers the question "is this worth looking into?" It cannot answer "is something wrong?" — because at least three things move the number without anything being wrong.
Specialty changes the whole structure. Oral surgery is the clearest example: total overhead is commonly cited leaner than general dentistry — roughly 40–50% — because the staffing and facility model is different. Yet the same oral surgery practice carries the highest per-case supply costs in dentistry: implant fixtures, biologics, and graft material can put hundreds of dollars of supplies into a single case. Leaner overall, heavier per case — a general-dentistry benchmark applied to a surgical practice misleads in both directions at once.
Geography moves the biggest lines. Rent and wages — the two largest overhead components — are set by local markets. The same practice, run identically, posts a different overhead percentage in a metro core than in a small town. Neither number is a management grade; both are partly a real-estate and labor-market fact.
The staffing model changes what "overhead" even counts. An owner-doctor who staffs their own hygiene column, or whose spouse runs the front desk, posts different numbers than a practice employing associates — and whether associate compensation counts as overhead at all is exactly the kind of definitional choice that varies. Two practices with identical economics can report percentages several points apart purely on accounting structure.
So use benchmarks the way they deserve to be used: as a screening threshold. Inside the commonly cited range with an explanation for where you sit — move on. Outside it — the useful next question isn't "how do we get to 65%?" but "which line is out of line, and is that a decision we made or a leak we haven't found?"
Which overhead line can you actually move this quarter?
Here's the observation that reorganizes the whole overhead conversation: the lines are not equally controllable, and their controllability has almost nothing to do with their size.
Facilities were decided when the lease was signed. You can revisit them at renewal — a real lever, on a multi-year timeline.
Staffing is technically adjustable at any time and practically the slowest, most consequential lever you have. Team changes ripple through production, patient experience, and culture. Treating payroll as a cost-cutting target because it's the biggest number is how practices damage the engine to save on fuel.
Lab fees track case mix. You can renegotiate or change labs, but the spend follows the dentistry.
Supplies are different in kind. Ordering happens weekly. Vendors are switchable. Prices are comparable. Waste is findable. A change made this month shows up on this quarter's P&L — no lease negotiation, no personnel decision, no clinical change required. It's the one major line where the feedback loop is measured in weeks.
That's the practical resolution of the overhead anxiety most owners carry: the biggest lines mostly reflect big, infrequent decisions that are either fine or are known projects. The line that rewards ongoing management is supplies — which is why the deep dive on supply spend benchmarks and where the leaks hide is the natural next read after this one. And for group practices, the supply line is also where multiple locations quietly pay different prices for identical items — a problem with its own playbook, covered in controlling supply spend across locations.
How do you build your own overhead breakdown in 30 minutes?
You don't need a consultant to get a first honest picture — you need a P&L and a few decisions made in advance.
- Pull a twelve-month P&L. A full year, not a quarter — overhead is seasonal and lumpy, and twelve months averages out the equipment purchase and the December slowdown.
- Pull collections for the same period. Collections, not production. Overhead percentages are conventionally quoted against money that actually arrived.
- Decide what doctor compensation means — and take it out. Owner pay, owner draws, and owner benefits run through the practice come out of the expense side. If you employ associates, decide explicitly whether their compensation counts as overhead, and write the choice down; it's the difference between comparable numbers next year and a mystery.
- Group every remaining expense into the buckets above. Staffing, facilities, lab, supplies, equipment, marketing, admin. Your bookkeeping categories won't map perfectly — the two distortions to fix while you're in there: lab fees hiding in the supplies account, and personal expenses hiding everywhere.
- Divide each bucket by collections. Now you have your own breakdown — total overhead percentage plus each line's share.
- Compare you to you. File it, repeat quarterly, and watch movement. Your own trendline answers questions no published range can: which line is drifting, and when did it start?
Thirty minutes, once — and the quarterly repeat is faster, because the bucket definitions are already made.
Where does SupplyLasso fit?
One honest note about where we sit in this picture: SupplyLasso doesn't manage your payroll, your lease, or your lab relationships. It manages the line this post kept coming back to — supplies, the one you can move this quarter. It makes the supply number visible without the invoice archaeology: spend by month and vendor, price changes on the items you actually buy, and invoices reconciled against what was ordered and received, automatically.
If your overhead breakdown says the supply line deserves a closer look, schedule a demo and we'll show you what your own supply spend looks like — by month, by vendor, and by item.