Methodology and assumptions
How our tools work, the data behind them, the assumptions they make, their limitations, and how to read the results.
What the analysis is
Our tools, including the Practice Health Benchmark, are educational diagnostics. They compare the figures you enter against general dental-industry benchmark ranges to show where your practice looks strong and where it may bear a closer look.
They are a starting point for a conversation, not a verdict, a valuation, an audit, or individualized advice. A number outside a benchmark range is a prompt to look closer, not a conclusion about your practice.
The assumptions behind a result
Every result depends on the inputs you provide and on the assumptions built into the calculation.
The same inputs always produce the same result.
The ranges are references for comparison, not standards every practice is expected to meet; where a published performance target is used as the band itself, it is identified as such. Being inside a range is not necessarily good, and being outside one is not necessarily bad. Practice stage, location, payer mix, ownership model, and personal goals all change what a number means.
Appropriateness
These tools are general and educational. They are intended for dentists and dental practice owners, and they are not tailored to any one person’s full financial situation, timeline, or goals.
A result is not a recommendation to take or avoid any action, and it is not a substitute for a complete analysis or for professional tax, legal, or accounting advice.
Limitations
A diagnostic is a snapshot. It reflects a single point in time; it cannot see everything that shapes a practice’s economics.
Benchmarks are directional references, not guarantees. Industry data carries lag and variance, and your circumstances may differ materially from any benchmark.
Nothing here predicts or guarantees any future outcome.
Each tool's own assumptions and methods
Practice Overhead Analysis
What this analysis assumes
- Total overhead reference range
- 55.0–65.0% of collections, for a general dental practice, excluding all dentist compensation.
- What counts as overhead
- Ten categories staff compensation, facility, lab, dental supplies, office supplies, technology and equipment, marketing, insurance, continuing education and other overhead.
- Practice type
- General practice this instrument uses the published general-practice ranges; it does not apply specialist-specific ranges.
- Reference ranges reviewed
- August 2026
Methodology
What this instrument measures
What the practice spends to run itself, as a share of what it collects, category by category against the published reference ranges for a general dental practice.
How the figures are computed
- Overhead entered = the sum of the non-doctor operating-expense categories answered. Once all ten are answered it is total overhead; until then it is a floor, because a category left blank adds nothing. Dentist compensation — the owner’s own pay and any associate’s — is never part of it, because the published reference range is measured that way.
- Overhead ratio = overhead entered ÷ collections. It is read against the published reference range only when all ten categories have been answered.
- Each category ratio = that category’s annual cost ÷ collections. Where a category has a published reference range, its ratio is read against that range whether or not the other categories were answered.
- Each category’s share of overhead = that category’s annual cost ÷ the overhead entered. With a category left blank that share is an upper bound on its share of the true total.
- A ratio is read against its published reference range as strong, within range, needs attention, or concerning. The strong edge is strict, and the other edges belong to the less-bad range — so a ratio exactly at the top of the range is inside it.
- The amount above the range = that category’s cost − (the top of its reference range × collections). It is stated only where the ratio sits above the top of the range.
- Findings are ordered by that amount, largest first, after the total-overhead finding, which is always stated first.
- A category with no published reference range is reported with its ratio and its share of overhead, and carries no verdict.
- An optional category left blank contributes nothing to overhead entered and reports no ratio of its own. Overhead entered is therefore no greater than total overhead; the difference is the combined cost of the blank categories, which may be nothing.
Where the benchmarks come from
- Total overhead range: published dental practice-management literature — ZenOne, "Dental Practice Overhead Benchmarks 2026" (a 55–65% range, attributed there to Overjet, 2025), and Dental Practice Insider, "Dental Practice Overhead Benchmarks 2026" (healthy, warning and critical tiers). Staff, facility, lab, dental supplies and marketing ranges: Dental Practice Insider's per-category tiers, with the firm's judgment where the published sources differ or stop short. The 65% and 70% total-overhead edges are the firm's judgment (2026-08-01). Sources re-checked 2026-09-02.
- Cross-check on total overhead: American Dental Association Health Policy Institute, "Survey of Dental Practice", 2025 results (© 2026 ADA). The survey measures expenses against GROSS BILLINGS rather than collections and reports averages rather than a distribution, so it is used here as a directional check on the range and never as its center.
- The technology and equipment range is PROVISIONAL. Technology spending is lumpy — a year with a new chair or a new scanner is not the same as a year without one — and published definitions of the category vary, so the range is deliberately wider than the source tier and is stated as a convention rather than as a measured norm.
- Office supplies, insurance, continuing education and other overhead carry NO published reference range. They are counted in total overhead, because the total range is measured over all non-doctor operating expense, and they are reported without a verdict.
What this instrument does not consider
- Dentist compensation — the owner’s own pay and any associate’s. The published reference ranges are measured on non-doctor operating expense, so including it would compare the practice against a different quantity.
- Whether a cost was a one-off or a recurring expense. A build-out or a new scanner lands in the year it was paid for.
- Practice debt, and how a loan is structured. A principal repayment is not an operating expense.
- Specialty mix. The reference ranges are general-practice figures, and a prosthodontic-heavy practice runs a materially higher lab share.
- The difference between production and collections, insurance write-offs, and when money arrives.
- Location, the age of the practice, staffing model, and every other reason two practices legitimately run different overhead.
Last reviewed
August 2026
Associate Hiring Decision
What this analysis assumes
- Associate pay
- 30–35% of the collections the associate produces: the range for a general practice, and the one the sale guide prints.
- The chair you open
- 36–47% of what the added days produce: the staff, lab and supply ranges, summed. The assistant and front-office hours ride the staff range.
- Your own dentistry
- 62–75% of collections: one minus the hygiene share.
- Room per operatory
- $250,000–$350,000 of collections a year: the range an equipped operatory carries.
- New patients
- 30–40 a month per dentist before adding an associate: compared at its low edge. This tool counts a dentist on your schedule as one dentist.
- Associate-covered
- under 70% of the dentistry produced by the owner: the mark practice-transition brokers publish for associate coverage.
- Owner-dependent
- 90% or more of the dentistry produced by the owner: the mark the same brokers attach to a valuation reduction. This tool states the direction and no figure.
- A chair day
- 8 hours the convention behind hours back a week.
- Sources reviewed
- September 2026
Methodology
What this instrument measures
Whether adding an associate adds up on six figures from your practice, read the way you would use the hire: to replace your own chair days, to expand capacity on new days, or a blend. Five reads in order: whether the demand for new days exists, whether the money works after the associate’s pay and the cost of the chair you open, the hours you get back, what your share of the dentistry does to a buyer’s read, and a plain answer naming the input with the least room to spare. Every projected figure is a range across the published edges of the bands it uses.
How the figures are computed
- Your own dentistry = annual collections × (1 − the published hygiene share), stated at both edges of that band. Per chair day = your own dentistry ÷ your chair days a week. The associate is taken to produce what you do per chair day, once up to speed.
- The schedule follows your choice. Replace: the associate works the days you hand off and no others. Expand: the associate works the same number of days you do, all of them new. Blend: the associate works the same number of days you do, some handed off from you and the rest new.
- Replacement production = per chair day × days handed off. Added production = per chair day × new days, capped at the room your operatories carry: operatories × the published collections per operatory, less what you collect today, never below zero.
- Associate pay = the published compensation share × (replacement production + added production). The cost of the chair you open = (the published staff, lab and supply shares, summed) × added production. Replacement production carries no chair cost: the same work is done on the same chair.
- Change in earnings = added production − associate pay − the cost of the chair. With replacement alone it is the associate pay, as a reduction. Earnings before any dentist is paid = annual collections − total overhead, the figure today. After the hire, earnings before you are paid = that figure plus the change; the associate’s pay is inside it.
- Hours back a week = days handed off × eight, taking a chair day as eight hours. Your share of the dentistry after the hire = your remaining chair days ÷ (your remaining chair days + the days the associate produces), where a handed-off day counts in full and an added day counts only for what the room lets it produce ÷ per chair day: the chair-day ratio when nothing is capped, a pair at the two edges of the room when it is, each edge read against the two published marks on its own. Before the hire it is all of it.
- Demand, when new days are added: the unscheduled treatment on your books is stated as months of the added days’ production; new patients a month per dentist after the hire = new patients a month × your chair days ÷ (your chair days + new days), compared with the published range’s low edge. The published band is per dentist; this tool counts a dentist on your schedule as one dentist, so the associate’s days are weighed against yours.
- Every projected figure is the lowest and the highest value of its formula across the published edges of the bands it uses, stated as a range at one granularity (three significant figures at or above $10,000, $1,000 below it), the low edge taken down to that granularity and the high edge taken up, so the printed range contains both computations. Measured figures use no band and are stated exactly in the recital and to the nearest $1,000 elsewhere; ratios to one decimal.
- The plain answer, with new days: the numbers add up when the change in earnings is above zero at the low edge, the demand read is not thin, and your operatories carry some of the added days. With replacement alone: it holds when earnings before any dentist is paid cover the associate pay at the high edge. When every check passes, the lever named is the one behind the check with the least room to spare. When one fails, the lever named is one whose move within this tool’s limits carries that check: fewer days handed off, down to the floor of your choice; the choice itself, where adding days alone clears it; more operatories, up to the most this tool accepts; or collections. Where no single figure does, the answer says so.
Where the benchmarks come from
- Associate pay: Henry Schein, "Thinking of Hiring an Associate?" — "30–35% of the associate’s collectable production or collection"; Dental Economics, Allen Schiff CPA (2023), most associates at 35% of collections with 30–33% common; MRL Advisory Group, general dentists at 30–35% of collections; the same published range the firm’s sale guide prints. The ADA Health Policy Institute publishes associate income in dollars and no percentage. Retrieved 2026-09-02.
- The chair you open, your own dentistry, and the room per operatory: the practice KPI bands reconciled 2026-08-01 against the ADA Health Policy Institute’s Survey of Dental Practice (2025 results) and the named practice-management literature (staff cost 25–30% and marketing amended 2026-08-20) — staff cost, lab, supplies, the hygiene share and collections per operatory read verbatim from that set.
- New patients a month before adding an associate: Dental Economics, Michael Kesner DDS, "How to decide when to hire an associate" (2018, updated 2020) — "at least 30 to 40 new patients per month, per dentist", corroborated per dentist by Dental Products Report (Abernathy, 2018: 40–70) and per practice by SVA CPAs (2024: 40–50), Henry Schein (20) and Dental CPAs (30–35). No industry survey publishes a threshold; these are consultant and brokerage figures. Retrieved 2026-09-02.
- The two owner-dependence marks: McLerran & Associates’ 2026 valuation articles — practices where the owner-doctor performs below 70% of chair time are priced higher, and practices where the owner-doctor performs 90% or more of production "can face a valuation reduction" — repeated by Dental Pitch Brokerage (2026). The published discount figures conflict across pages of the same publisher and cite no transaction data, so this tool states the direction of the read and prints no figure. Henry Schein, ADS Transitions, Cain Watters and Auxo state direction only. Retrieved 2026-09-02.
What this instrument does not consider
- The ramp. A new associate produces less than your rate for months, and the published convention is to hold 6–12 months of their pay in reserve; this tool reads the position once the associate is up to speed.
- Benefits, payroll taxes, malpractice cover, recruiting, and the mentoring hours the associate takes from you. Only the published compensation share and the three published chair cost shares enter.
- A practice that already employs an associate. The read assumes you are the only dentist today, so your share of the dentistry before the hire is all of it.
- Whether the associate brings patients of their own, and how your patients respond to a second provider. The demand read uses your unscheduled book and your new-patient flow.
- Specialty practices. Every band is the general-practice range; a specialist’s associate pay and chair economics differ and are not modelled.
- A part-time schedule of your own. The published new-patient band is per dentist, and this tool takes your own chair days as one dentist, so a one- or two-day week reads its new-patient flow as thin sooner than a full-time practice would.
- Taxes, debt, and the terms of any sale. Every earnings figure is before them, and the valuation read is a direction inside a published range, not a price.
Last reviewed
September 2026
These results are a hypothetical, best-effort estimate for educational use, based on the numbers you entered and the assumptions and limitations explained in our methodology. They change with the figures you enter and with the assumptions behind them, and both move over time. They are not guarantees of future results and should not be taken as financial, tax or legal advice for your situation.
See it on your own numbers
A conversation puts these numbers in the context of your practice.