TriggerCal.comReal-timeUpdated May 2026
When does Cal.com fire on cancellations?
Short answer: Drop the "Cal.com → Booking Cancelled" trigger on your workflow canvas, add filters if you want them, and publish. It fires within seconds of the event in Cal.com, not on a polling schedule.
Anatomy
What this trigger looks like in a workflow.
Drop it on the canvas. Configure a couple of fields. Publish.
In the builder
Trigger
Booking Cancelled
When the matching event happens
watch for booking cancelledwhen a booking is cancelledwhen booking cancellednew booking cancelledon booking cancelled
What this trigger returns
for the curiousYou don’t need to read this. Tiny Command auto-maps every field into the visual picker so downstream nodes can pull values by clicking. We show it here for power users who want to know what’s on the wire.
{"event": "BOOKING_CANCELLED","start": "2026-04-15T14:00:00Z","title": "Meeting with John","attendee": "john@example.com"}
Output shape
Fields available to downstream nodes.
Every field below can be referenced by name in any action or filter that comes after this trigger.
| Field | Type | Example |
|---|---|---|
| event | string | "BOOKING_CANCELLED" |
| start | string | "2026-04-15T14:00:00Z" |
| title | string | "Meeting with John" |
| attendee | string | "john@example.com" |
Pairs with
Drop these actions after Booking Cancelled.
FAQ
Questions about Booking Cancelled.
How does the Booking Cancelled trigger work in Cal.com?
Fires when a booking is cancelled — by the booker, by the host, or via API. Payload includes the booking, the cancellation reason if provided, and the attendees. The hook for "free up calendar slot, notify waitlist, refund deposit" cascading workflows.
Is the Booking Cancelled trigger real-time?
Yes. Booking Cancelled uses webhooks or push subscriptions, not polling. Your workflow fires within seconds of the event happening in Cal.com.
What data does Booking Cancelled return?
The full event payload from Cal.com. The output shape table on this page lists every field, its type, and an example value so you can map fields into downstream nodes.
Can I filter Booking Cancelled so only some events start a workflow?
Yes. Add a Filter node right after the trigger and match on any field, whether that's subject, sender, status, or anything else in the payload. Workflows only continue when the filter passes.
Do I need Cal.com admin permissions to use Booking Cancelled?
For most Cal.com accounts a standard user can authorize the trigger. Some Cal.com plans require an admin to enable third-party webhooks. Check Cal.com's docs if the trigger fails to register.
More triggers
Other Cal.com triggers.
Trigger
Booking Created
Fires the moment someone books a meeting via Cal.com. Payload includes booker, host, event type, time, custom-question answers. The base hook for "new booking → push to CRM, send pre-meeting brief, create the Notion record" workflows.
TriggerBooking Rescheduled
Fires when a booking moves to a different time. Payload includes both old and new times. Useful for cascading updates — adjust downstream reminders, update calendar holds, sync the new time to client CRM record.
Build a workflow on this trigger.
One trigger. 7+ downstream actions. Zero glue.
