No-Show Cost Calculator
What no-shows cost your appointment book, and what your moves win back.
Booked and vanished
399 no-shows a year at $85 each — appointments you already won
Never booked at all
832 open slots a year nobody filled — a different problem, covered below
Revenue you keep
2,929 kept appointments
The moves, and what each wins back
A reminder cadence
At 25% fewer no-shows
A deposit policy
Deposits kept on the no-shows that still happen
Waitlist backfill
Enter a refill rate above to see this move
Together
The moves overlap, so this is less than the rows summed. About 300 no-shows a year would still stand.
Reminder default: Robotham et al. 2016, BMJ Open — a 16-study meta-analysis found digital reminders cut missed appointments by 25%.
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What a no-show costs
The formula is short. No-shows a year times your average ticket equals revenue that walked out already booked. Two chairs at 40 bookable hours a week hold 4,160 appointments a year; book 80 percent of them and 3,328 are spoken for, and a 12 percent no-show rate means about 399 of those never arrive. At an $85 ticket, that is roughly $33,900 a year lost from appointments you had already won.
The quieter hole is usually bigger. In that same book, 832 slots a year were never booked at all — about $70,700 of capacity nobody claimed. The two problems wear the same face on a slow afternoon and have different fixes. A deposit or a reminder polices the vanishing kind; the never-booked kind is a demand question, which is what the marketing break-even calculator is for.
If you are wondering whether your rate is unusual, the widest review of appointment no-shows on record — 105 studies across outpatient scheduling, Dantas et al. 2018 — puts the average around 23 percent. A single-digit rate is already better than most of what the literature has measured.
It cannot tell you whether anyone wanted the empty slot. The waitlist number is your read of your own demand, and the calculator treats it as exactly that — your assumption, worked through honestly. If nobody is waiting on a Tuesday morning, a recovered Tuesday slot recovers nothing.
The reminder default comes from healthcare, because that is where the careful measurement lives. A clinic is the closest-studied cousin of a salon chair or a dental op, not the same room; treat 25 percent as a starting point and watch your own rate for a month before you believe it. The math also counts one appointment per provider-hour — a business running 30-minute slots should double its hours field, and everything holds.
A deposit policy that holds
Whether you call it a deposit or a no-show fee, the mechanics are the same. A small payment at booking changes what the appointment means to the person who made it, and it pays you something when they vanish anyway. Keep it proportionate — a $25 hold on an $85 service reads as seriousness, not as a penalty — and apply it to the visit, so a customer who shows up never actually pays it.
The policy holds when nobody can be surprised by it. Say it at booking, repeat it in the reminder, and honor the exceptions you would want honored — the sick kid, the closed road, the customer of nine years. A card on file with a stated fee is the gentler cousin and works on the same principle. What the arithmetic above cannot weigh is trust: regulars who book on a handshake may read a new fee as an insult, and that judgment call is yours, not the calculator’s. If it is sitting on your desk right now, it is worth a conversation.
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