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When the waitlist doesn't respond: a discount if the appointment is close, full price if it's far off

You'll know how long to wait on the waitlist, when to lower the slot's price, when to list it as-is, and when to accept that it won't fill today.

By Yodai · Published on September 6, 2026 · Updated on October 12, 2026

You notified everyone on the waitlist as soon as the slot opened up. The window you gave each person passed, and no one answered. There's no one left to notify, and the slot is still empty.

Every minute that passes is worth less: the closer it gets to the appointment time, the fewer people have time to rearrange their schedule to come in. The question shifts. It's no longer who to notify, but what to do once you've notified everyone: do you reopen the slot at a lower price so someone grabs it fast, post it as is for whoever happens to see it, or accept that this slot isn't getting filled today?

How long to wait before deciding

You already know the slot doesn't wait for anyone: if someone on the list doesn't answer within their window, you move on to the next person, no guilt involved. What's left to decide now is how long to wait once there's no one left to move on to.

The rule isn't a fixed number. It's a ratio tied to how much time is left before the appointment. The farther off the time, the longer you can afford to wait. The closer it gets, the less. The hours in the table are based on data from a different industry and country: in the Mayo Clinic medical appointment waitlist, in the United States, which in 2023 sent out more than a million automatic opening alerts to patients who already had an appointment and wanted to move it up, half of the responses came in within the first 25 minutes, and nine out of ten came in before 2.7 hours. Your customers aren't hospital patients, and you're the one sending the alert to your list, so take this as a guide, not a rule: if people respond at a similar pace, in half an hour you'll have half of the responses you're going to get, and in three hours, almost all of them.

What the slot is worth, based on how much time is left

The same ratio doesn't just tell you how long to wait. It also tells you what the opening is already worth. Every hour that passes without filling it, fewer people are able to rearrange their schedule to come, which lowers what you can charge for it without risking it staying empty altogether. The first part, that the closer the appointment gets the fewer people take it, has also been measured in medical appointments in the United States: in the Sutter Health waitlist, a California healthcare network, out of the 177,311 automatic opening alerts it sent between July and December 2018 to patients who already had an appointment and wanted to move it up, 13.5% of the alerts were accepted for 8 to 14 days out, 8.2% for the next day, and only 3.7% for the same day. It's a different industry and country: look at how it drops, not the exact percentages.

Reopen at a discount or list it at the regular price

With the ratio clear, there's just one underlying decision left. You lower the price so it fills faster, or you leave it as is and accept that it might stay empty. Lowering it has a cost that doesn't show up on day one: some customers learn to wait. It's been measured in another industry, airline tickets: in a study using airline ticket data, done with flight bookings sold in the United States, the share of buyers who delayed their purchase hoping the price would drop ranged from 5.2% to 19.2% across half of the routes studied, and most of them showed up right when sales opened or close to the flight's departure. An opening in your schedule isn't a plane ticket: the data doesn't say how many of your customers would wait, only that this habit exists.

When it's not even worth trying

There's a third case, and it needs a decision too.

There, you take the loss and move on. If you charged a deposit at booking and your booking terms say it's non-refundable on cancellation, that deposit is what keeps the loss from being total. If your customer is an individual, they need to be able to read those terms before booking, and the terms have to work both ways: Spain's General Law for the Protection of Consumers and Users treats it as unfair to keep what a customer paid if they cancel, unless you'd also owe them an equivalent amount if you were the one canceling.

The message that reopens the slot

Short, with the time, and no explanation of why it opened up. No one needs to know it was another client's appointment.

What's left is what happens if that same person no-shows more than once without notice, and when that charge gets forgiven. That's next.

With the discount, the last-minute opening has a better shot at finding someone. The one thing price can't fix is the customer who booked, never gave notice, and never showed: there's no waitlist that helps there, just the question of what you charge them, and whether anything changes the second time.

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