Who is this article for?
On your online booking page, Colib offers your clients start times at regular intervals: for example 9:00, 9:30, 10:00... You choose this interval. A short interval offers more choice; a longer one gives a tidier schedule.
This article explains where to set this interval, how Colib uses it to build the times offered, and the setting that lets you offer a time right after an existing appointment.
Before you start: these settings are only visible when the Client booking type is Online booking by client (Settings > Booking Page, www.colib.io/settings?show=bookingpage). See How do I set up the booking process in Colib?
1Choose the time between slots
- Go to Settings > Booking Page (www.colib.io/settings?show=bookingpage).
- Open the Direct Booking section and scroll down to Availability.
- In Time between available appointment slots, choose a value between 5 and 240 minutes.
- Optionally, choose your Availability preference (see below).
- Click Save at the bottom of the page.

2How the times are calculated
Colib starts at the beginning of each availability period (opening hours, availability group, end of a break) and then moves forward by the interval you chose. A time is offered only if the whole appointment, including its buffers, fits in the availability and does not overlap another appointment.
Example: availability from 9:00 to 12:00, interval of 30 minutes, appointment of 50 minutes. Your clients are offered 9:00, 9:30, 10:00, 10:30 and 11:00. 11:30 is not offered, because the appointment would end after 12:00.
3Availability preference
| Option | What your clients see |
|---|---|
| Offer consistent time slot regardless of schedule | Always the same regular times (9:00, 9:30, 10:00...), whatever the appointments already booked. A time that overlaps an existing appointment is simply not offered. |
| Offer a time slot as soon as it's available | Colib also offers a time right when an existing appointment ends. For example, if an appointment ends at 10:15, 10:15 is offered and the next times follow from there. This fills the gaps in your day. |
Practices with several clinics
Each clinic can have its own interval. Go to Settings > Multi-Clinics (www.colib.io/settings?show=clinics), click the pencil icon of the clinic, open Direct booking and choose a value in Time between available appointment slots. Leave Use the practice setting to keep the interval of the Booking Page settings.

Good to know
- Only the booking page — this interval only applies to the times offered to your clients online. In the scheduler, your team can still create an appointment at any time.
- Group classes — for appointment types booked as classes, the interval does not apply: clients see the sessions you created in the scheduler, at their own start time.
- Shape your availability — to offer certain appointment types only on some days or times, use availability groups: How can I customize my availability with availability groups?
- Avoid last-minute bookings — the booking window and the buffers before and after an appointment are set on each appointment type: How can I manage the timing of client bookings?
Still have a question?
Write to us at support@colib.io, we will be happy to help.
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