Two corrections that halve the number
The instinctive figure for a missed appointment is the price on the menu. It is wrong twice over. First, you did not spend the product, the supplies or the card fee on a client who never arrived, so what you lost is contribution rather than revenue. Second, a cancellation that gets refilled is not a loss at all. On the default numbers those two corrections take a headline that looks like $580 a week down to $426, and if you refilled everything instead of a third it would be $273.
There is a third correction that only applies to some businesses. If the person who would have done the work is paid hourly and is standing there anyway, the empty hour is a real cost and there is nothing to subtract. If they are on commission or renting the chair, you did not pay for the empty hour and the loss is smaller — but their loss is larger, which is why the same policy feels very different from the two sides of the same room.
The refill rate is the only free lever
Deposits cost you bookings. Fees cost you goodwill. Overbooking costs you collisions. Refilling a cancelled slot costs nothing at all, and it is the only line on this page where an improvement has no downside attached to it. Every ten points of refill rate on the default numbers is worth about $23 a week, which is a waitlist and a text message rather than a policy.
It also has a hard limit. A no-show gives you no notice, so there is nothing to refill with, and that part of the loss can only be attacked by making fewer people no-show in the first place. Splitting the two rates is worth doing for that reason alone: they have different causes and completely different remedies.
A deposit earns most of its money before it is ever charged
Run the defaults and the deposit policy nets about $38 a week. Look at where that comes from and roughly seven-tenths of the gain is appointments that happened because a deposit was on the line — people who would otherwise have missed and instead turned up and paid for a service. Under a third is deposits actually collected from people who missed anyway.
That split has a practical consequence. Deterrence depends on the deposit being real, being known about at the time of booking, and being credibly enforced. Collection depends on whether you actually put the charge through. A policy that is announced but never enforced loses the collection immediately and the deterrence shortly afterwards, once word gets around. And the cost side is the line most people set to zero without checking: the clients who will not leave a card and book somewhere else. At 3 percent of bookings that line is larger than the deposits you collect.
Overbooking is a bet, and the arithmetic is exact
An overbooked slot pays only when somebody else misses. With ten appointments in a day at a 7 percent no-show rate, the chance that nobody misses is 0.93 to the tenth, which is 48 percent — so almost half of overbooked days end in a collision. The page works this out from the binomial distribution rather than from the average, because the average no-show count of 0.7 a day suggests an overbooked slot is safe and it plainly is not.
Whether the bet is worth it turns almost entirely on the cost of a collision, which is the hardest number here and the one people set too low. Running twenty minutes late is not free, a comped service is not free, and a regular client who was made to wait because you sold their slot twice may simply stop booking, which is a cost that arrives months later and never gets attributed to the policy that caused it.
Related pages
For the chair on the other side of an empty slot, booth rent vs commission shows why the same missed appointment costs the salon and the stylist very different amounts. If the empty slot is a whole class or session rather than one appointment, schedule utilization handles fixed-capacity sessions, and workshop pricing covers cancellations and refunds on a one-off course.
For a mobile business, an empty slot also destroys a piece of the route — route jobs per day shows how much of a day one lost stop actually removes. And break-even sales is the general version of the fixed-cost arithmetic underneath all of it.
Questions people ask
What does a no-show actually cost?
Not the ticket price. It costs the contribution the appointment would have left: the ticket minus the product, supplies and card processing you never spent. If the provider is paid by commission or rents the chair, subtract their share too, because you did not pay it. What is left is usually well under the menu price, and it is the correct basis for deciding what a policy is worth. The one thing that does not shrink is the hour itself, which is why the idle-hours line on this page is worth reading next to the money.
Do deposits actually work?
The arithmetic here says they usually do, but not for the reason people expect. Most of the gain is appointments that happened because a deposit was on the line, not fees collected from people who missed. That means the policy lives or dies on being credible at the moment of booking rather than on your collection rate. It also means the cost side matters: the clients who refuse to leave a card and book elsewhere are a real line, and at a few percent of bookings they can outweigh everything you collect.
Can I charge a client who does not show up?
That is not an arithmetic question and this page will not answer it. Whether you can take a deposit, keep a card on file, charge it after a missed appointment, or bill a cancellation fee depends on your card network rules, your merchant agreement and consumer protection law where you operate, and the answers differ. The right sequence is to settle what you are permitted to do with your payment processor and an attorney, and only then work out whether it is worth doing. Nothing here says a fee is enforceable.
How much should I overbook?
Start by noticing how often it goes wrong. With ten appointments a day at a 7 percent no-show rate, the chance nobody misses is about 48 percent, so a single overbooked slot collides on roughly half of days. The calculation on this page is exact rather than average-based for exactly that reason. Whether it pays depends on what a collision costs, and that number should include the client who was kept waiting and quietly stopped booking, which is the part that never gets counted.
Is my no-show rate normal?
This site publishes no benchmark figures and there is no honest number to give — it moves enormously with the type of service, the price, the neighbourhood, how far ahead people book and whether you remind them. What is worth comparing is your own rate against your own history, particularly before and after a change in reminders or deposits, because that comparison is the only reliable source for the deterrence percentage this page asks you to supply. Pull both rates from your booking system rather than from impression; memory reliably overstates no-shows because the empty chair is memorable and the full one is not.