Dental clinic break-even: how many chair hours pay for the month
Ask a clinic owner how the month went and the answer is usually a revenue figure. Ask on which day of the month the clinic covered its costs and started earning, and very few can say. That date is the break-even point. It takes an hour to calculate the first time, and it changes how you look at an empty chair, a discount and a new hire.
Revenue tells you how busy you were, not how safe you are
Two clinics can both bill 400,000 in a month. One covers its costs on the 14th and the other on the 27th. They look identical on a revenue report, and they are completely different businesses. The first can absorb a slow week or a dentist on leave. The second cannot.
Break-even answers a simple question: how much work does the clinic have to do before the owner earns anything? In a dental clinic the most useful unit for that work is the chair hour, because the chair is the thing that is either producing or standing empty.
Step one: separate the costs that do not move
Fixed costs are paid whether one patient comes in or two hundred. List them for a month:
- Rent and service charges
- Salaries for reception, assistants, cleaners and any dentist on a fixed salary
- Equipment leases and loan payments
- Software, internet and phone
- Utilities, licences, insurance and accounting fees
- The marketing you would spend even in a quiet month
One line is missing from most lists. If the owner is a dentist who treats patients, include a salary for that clinical work at the rate you would pay someone else. Without it, the clinic looks profitable when in fact the owner is working for free.
Step two: find what each chair hour leaves behind
Variable costs rise and fall with the work. For a dental clinic these are mainly the dentist's commission, materials, lab fees and card payment fees. What remains from each hour after variable costs is called contribution. It is the money available to pay the fixed costs.
Take a clinic with these round numbers:
- Average revenue per chair hour: 900
- Dentist commission at 30%: 270
- Materials at 8%: 72
- Lab fees averaged across all work, 5%: 45
- Card fees, 2%: 18
- Contribution per chair hour: 495
Out of every 900 billed, 495 is left to cover rent and salaries. The rest never belonged to the clinic.
Step three: divide
Break-even chair hours equal monthly fixed costs divided by contribution per chair hour. If fixed costs are 120,000 a month:
120,000 divided by 495 gives about 242 chair hours.
Now compare that with what the clinic has to sell. Two chairs, eight hours a day, 26 working days gives 416 available chair hours. Break-even is 242 of them, which is 58% utilisation. Below 58% the clinic loses money. Every hour above it earns 495 for the owner.
That one percentage is worth knowing by heart. It tells you how much empty time the clinic can afford.
The break-even day
Turn the same figure into a date. If the clinic sells about 15 chair hours a day, it reaches 242 hours on the 17th working day. Everything before that day paid the bills. Everything after it is profit.
Track this date every month. If it moves from the 17th to the 22nd, something changed: a rent increase, a new salary, lower utilisation, or a shift toward work that leaves less behind. The date moves weeks before the bank balance shows a problem.
Not every procedure leaves the same amount
Price is a poor guide to what a procedure earns. Compare two with illustrative numbers:
- A cleaning billed at 400 takes 30 minutes. That is 800 per chair hour. After commission and materials, about 520 per hour remains.
- A crown billed at 3,000 takes 90 minutes of chair time across two visits. After a lab fee of 600, commission of 900 and materials of 150, the clinic keeps 1,350, which is 900 per hour.
The crown leaves almost twice as much per hour, even after the lab is paid. Rank your ten most common procedures by contribution per chair hour, not by price. Clinics usually find one or two popular procedures near the bottom, and that is the place to review the price, the time allowed or the materials used.
Three levers, and what each one does
Only three things move break-even:
- Utilisation: fill more of the hours you already pay for. This does not change the break-even figure, but it decides how far past it you get.
- Mix and price: raise contribution per hour. If it goes from 495 to 560, break-even drops from 242 hours to 214.
- Fixed costs: lower the bill. Cutting 10,000 a month removes about 20 hours from break-even.
Most owners reach for the third lever first because it feels like control. In a clinic with empty chair time, the first two are usually worth more.
What a discount really costs
A discount comes off the price, but the costs behind the procedure stay where they are. On a procedure with a 55% contribution margin, a 10% discount removes 10 points out of 55. That is 18% of what the clinic keeps, not 10%.
Before approving a campaign, work out how many extra procedures are needed just to stand still. At a 55% margin, a 10% discount needs about 22% more volume to earn the same contribution. If the offer will not bring that, it lowers profit while the diary looks fuller.
Insurance price lists work the same way. A lower fee with the same costs leaves less per hour, so calculate contribution per chair hour for each payer. Some contracts sit close to break-even on their own, and it is better to know which ones before giving them your best hours.
Using break-even for decisions
The same division answers the large questions:
- A new assistant at 8,000 a month needs about 16 more chair hours a month to pay for itself at 495 per hour.
- A third chair adds rent, equipment and staff. Divide the added fixed cost by contribution per hour to see how many hours it must sell, then ask whether the waitlist supports that.
- A second branch has its own break-even and usually takes months to reach it. Budget the months before that point as part of the opening cost.
Start this week
- List last month's fixed costs, including a salary for the owner's clinical work.
- Calculate average revenue per chair hour from last month's invoices and hours worked.
- Subtract commission, materials, lab and card fees to get contribution per chair hour.
- Divide fixed costs by contribution to get break-even hours, then turn it into a utilisation percentage and a day of the month.
- Rank your ten most common procedures by contribution per chair hour.
Dentolize is clinic management software for dental clinics in Egypt and Saudi Arabia. Request a demo to see it on your own clinic's cases.
Questions
What is a good break-even utilisation for a dental clinic?
There is no single correct figure, because rent and salary levels differ by city. A clinic that breaks even at around half its available hours has room for a bad month. One that needs 80% is fragile, however busy it feels.
Should the dentist's commission count as a fixed or variable cost?
Commission paid as a percentage of work is variable. A dentist on a fixed salary is a fixed cost. Many clinics have both, and each goes in its own place.
How often should break-even be recalculated?
Once a quarter, and whenever a fixed cost changes: a rent renewal, a new hire or a new lease. The break-even day should be noted every month.
Does break-even include loan repayments?
Include them if you want to know when the clinic stops needing money from outside, which is what most owners mean. An accountant separates interest from principal, but for running the clinic the cash view is the useful one.
We are past break-even every month. Is there anything to do?
Look at contribution per chair hour by procedure and by payer. A profitable clinic often carries a few services or contracts that earn very little, and moving those hours to better work raises profit without a single new patient.
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