A missed appointment feels like a lost hour. In fact it is a number you can work out in five minutes. This article gives you the formula, explains why the value of a slot is not the price of one service, runs the numbers for eight trades and shows how to find your own no-show rate in two weeks, and what halving it is worth per year.
What does a no-show cost? The simple formula
The calculation has four parts: appointments per week, share of no-shows, value per slot and working weeks per year. Multiply them and you get the sum that goes missing every year without ever showing up as a line in your accounts. We use 48 weeks, because holidays and public holidays take care of the other four.
An example: 40 appointments a week, ten percent no-shows, 60 euros per slot. That is four missed appointments a week, or 240 euros. Times 48 weeks makes 11,520 euros a year. For a single chair or treatment room, at a rate many businesses consider normal.
The formula is deliberately simple. It should give you an order of magnitude in a minute, not a balance sheet. Two of the four numbers you know straight away. The other two, the share and the value per slot, get their own sections below, because that is where most people go wrong.
- Appointments per week: everything booked, across all staff and all chairs or rooms.
- No-show share: appointments where nobody turned up and nobody cancelled, divided by all appointments.
- Value per slot: your hourly rate times the length of the slot, not the price of one service.
- Times 48 weeks: the year minus holidays and public holidays, realistic for most businesses.
Slot value: hourly rate times slot length
The most common mistake: people plug in the price of the service that was missed. A men's haircut at 28 euros falls through, so the no-show cost 28 euros. That only holds if the slot really was that short and nobody else could have used the time.
Instead, use the hourly rate of the chair or room times the length of the slot. If a chair earns 60 euros an hour on average and an hour was blocked, the no-show cost 60 euros, whatever service was booked. In that hour you could have done a colour or two short cuts.
Your hourly rate is in your revenue: monthly takings for one chair divided by the hours it was booked. People who have never worked it out are often surprised how high the number is. And, by the same token, how much an empty hour costs.
The hidden cost of a missed appointment
Lost revenue is the visible part. On top come costs that arise anyway: the staff member is there and gets paid whether the customer shows or not. Materials were prepared, and in a beauty studio or tattoo studio they are sometimes already opened. Rent keeps running by the hour.
The most expensive item is invisible: the customer who would have loved that slot. In practices with waiting lists and in busy salons, every gap is a slot denied to someone who needed it. Perhaps they have booked elsewhere by now. That customer never appears in any calculation, but they are missing.
For the formula, stick with hourly rate times slot length. That keeps it honest and comparable. Just remember that the result is closer to a floor than a ceiling. If you prepare materials or schedule staff specifically for the appointment, your real figure is higher.
Cost of no-shows: examples for eight trades
The figures below are typical orders of magnitude, not statistics. Every business is different, and your own hourly rate matters more than any average. What the examples really show is how much the value per slot swings with slot length and staffing. Each one assumes 48 weeks and a no-show rate of around ten percent, which may be low or high depending on the trade.
One pattern stands out: businesses with short appointments lose little per no-show, but often. Businesses with long slots lose rarely, but a lot. Both end up with surprisingly similar annual sums. Only the right countermeasure differs, and there is more on that below.
- Hair salon: 40 appointments, around 60 euros an hour, one hour per slot. Roughly 11,500 euros per chair per year.
- Beauty studio: 30 appointments of 60 to 90 minutes, materials usually prepared. Typically 9,000 to 13,000 euros a year.
- Physiotherapy: 80 short appointments of 20 to 30 minutes at around 45 euros. Usually 15,000 to 18,000 euros per therapist.
- Medical practice: 100 or more short appointments a week. Even five percent missed quickly reaches five figures, depending on billing.
- Car workshop: 25 jobs, long slots, lift tied up, 80 to 100 euros an hour. Often over 20,000 euros.
- Driving school: 30 lessons of 45 to 60 minutes, instructor waiting in the car. Usually 7,000 to 9,000 euros.
- Veterinary practice: 60 appointments of 15 to 30 minutes, staff and room scheduled. Typically 10,000 to 14,000 euros.
- Tattoo studio: few, very long sessions, often half a day. One no-show a week means 15,000 euros or more.
Calculate your no-show rate: count for two weeks
The rate is the one number you should not guess. Most owners guess too low, because the annoyance of the last no-show fades quickly and last-minute cancellations do not register as missed appointments. Two weeks of tally marks give you a more honest figure than a year of gut feeling.
Count only true no-shows: appointment booked, nobody there, no cancellation. Keep short-notice cancellations in a second column. They cost about the same but need different measures. After two weeks, divide the no-shows by all booked appointments and multiply by a hundred.
- Pick two normal weeks, with no school holidays, no promotion and no new staff.
- Count every appointment that falls through without a cancellation, whatever the service or the person.
- Note short-notice cancellations separately, anything under 24 hours before the slot.
- After two weeks: no-shows divided by all appointments, times a hundred, gives your rate.
- Put the rate into the formula and write the annual figure down somewhere you will see it.
What halving your no-show rate is worth per year
No business reaches zero no-shows. People fall ill, cars refuse to start. Halving the rate is realistic: from ten percent to five, from six to three. Most businesses get there with a confirmation at booking and a reminder the day before, without stricter rules and without deposits.
In the opening example that is 5,760 euros a year that stay in the business. For the workshop in the list it is over 10,000 euros, for the physiotherapist around 8,000 euros. That is the figure to weigh every measure against: if it costs less than that per year, it pays for itself.
Reminders pay back first, because they cost almost nothing and reach every appointment. With terminio.ai, confirmations and reminders go out on WhatsApp from your own number, with no cost per message, five reminders a month on the Free plan and unlimited on Pro. The WhatsApp page has a calculator where you can enter your own numbers. Deposits come next, for the long, expensive slots where a single no-show costs more than a year of reminders.
