A no-show costs a practice the full value of the appointment, and at the default inputs of the No-show cost calculator — three chairs, 230 working days, eight appointments a chair a day, an average appointment value of $250 and an 8% no-show rate — that comes to about 442 missed appointments and $110,400 of lost production a year, or roughly $9,200 a month. Because the chair, the staff and the rent are paid whether or not the patient turns up, most of that is lost margin rather than revenue you would have spent to earn. In most markets a no-show rate of 5–10% is typical and under 5% is excellent, so for most practices the realistic goal is to halve the number, not to reach zero.
The arithmetic, step by step
The calculator does four multiplications. With the defaults:
- Annual appointments = chairs × working days × appointments per chair per day = 3 × 230 × 8 = 5,520.
- Missed appointments = 5,520 × 8% = 441.6, call it 442.
- Lost production = 441.6 × $250 = $110,400 a year.
- Per month = $110,400 ÷ 12 = $9,200.
Halve the rate to 4% and the practice recovers $55,200 a year without a single new patient. The currency symbol is a placeholder: put in your own figures in your own currency and the arithmetic is the same in Sydney, Auckland, Leeds, Denver or Calgary.
Two of the inputs deserve care. The average appointment value should be annual production divided by appointments completed, not the fee for a check-up, because the no-show that hurts is the crown preparation, not the recall. And the no-show rate must come from your software's failed-to-attend status, counted against all appointments for the month, which only works if the team records the status every time.
Why it is lost production, not lost profit
A general practice runs at 55–65% overhead in most markets, and nearly all of that is fixed for the day. When a patient does not arrive, the practice avoids the lab bill and a few dollars of supplies, perhaps 10–20% of the appointment's value. Everything else — wages, rent, software, insurance, the loan on the chair — is spent regardless. So of the $110,400 above, something like $90,000 is margin that would have reached the bottom line.
That is also why a no-show is worse than a slow day. On a slow day the empty hour was never booked and the roster could have been adjusted. A no-show hour was booked, staffed and prepared, and it turns up in the Dental chair utilisation calculator as an idle hour that was supposed to be productive. At that calculator's defaults the practice has 6,210 available chair hours and 4,500 booked, a utilisation of 72.5%; no-shows quietly widen that gap.
What a normal rate looks like
Benchmarks in most markets put a typical general-practice no-show rate at 5–10%. Under 5% usually reflects a solid reminder sequence and a clear policy explained at booking; over 12% means either the reminders are not reaching people or there is no consequence for missing. Published studies of clinic populations report much higher figures, sometimes 20% or more, but those are mostly public or teaching clinics with a different patient mix.
The mix matters when you compare yourself with a benchmark. Studies of non-attendance consistently find that new patients miss far more often than existing ones, that younger adults miss more than older ones, that Friday and last-appointment-of-the-day slots are cancelled more often, and that patients with no recorded mobile number are markedly more likely not to arrive. A practice with a heavy new-patient or emergency flow will run above the range even with good systems.
What actually reduces no-shows
Reminder timing
The best-evidenced intervention is the text message. A Cochrane review of eight randomised trials found attendance of about 68% with no reminder and 79% with a text reminder, and that texts were as effective as phone calls at a fraction of the cost. In practice the sequence that works is a text at 48 hours with a reply-to-confirm option and a second at two hours, plus a phone call the day before for new patients, who are the group most likely to fail.
A reminder also does something the calculator cannot show: it converts some would-be no-shows into cancellations with notice, which can be refilled.
A short-notice list
Keep a live list of patients who want an earlier appointment and text it the moment a slot opens. A no-show itself gives no notice, but the 48-hour reminder surfaces the patients who were going to miss, and a short-notice list turns their slot into production. Practices that run the list well refill 50–70% of late-notice gaps in most markets.
Deposits for long appointments
A deposit on appointments over an hour or above a set value, credited against the fee and refunded with 24 or 48 hours' notice, is easier to explain than a fee for a missed check-up and targets the appointments that cost the most to lose. It moves a share of the cost to the patient, so it can deter a few genuine bookings; use it for the long appointments, not the whole book.
A missed-appointment policy at booking
Write the policy down, show it to new patients, have them acknowledge it and apply it the same way every time. Association guidance suggests giving reception prepared talking points for frequent non-attenders, tracking them in the software, and rebooking a repeat offender into a later or less critical slot rather than the next prime one. The policy is the consequence; the reminder is the prevention. Both are needed.
Late cancellations are a different problem
A late cancellation gives you some notice and a chance to refill the slot; a no-show gives you none. Track them separately, because the fixes differ: cancellations respond to a short-notice list and a clear notice period, no-shows to reminders and policy. One Australian study found that 71% of cancellations happened on the day of the appointment, which is why the refill process, not the cancellation count, is the number to work on.
The Cancellation cost calculator handles the other half of the picture. At its defaults — six late cancellations a week, 30% refilled, $250 an appointment and 47 working weeks — unfilled cancellations cost $49,350 a year; lifting the refill rate to 60% brings that down to $28,200. Set the definition of "late" once, usually 24 or 48 hours, tell patients at booking and record it consistently.
What to do next
- Run a failed-to-attend report for the last three months, work out your true rate and put it into the No-show cost calculator with your real average appointment value.
- Change the reminder sequence first: two texts with reply-to-confirm and a day-before call for new patients. Re-measure after a month.
- If the rate is still above 8%, add a deposit on long appointments and a written policy explained at booking, and put the Cancellation cost calculator figure next to it so you fix both halves.
