You can show attendees how many tickets remain once availability falls to a threshold you choose. The message stays hidden while the remaining quantity is above that threshold.
Set the remaining-ticket threshold
Go to Revenue > Tickets.
Open Manage Ticket for the ticket you want to update.
In Details, set Quantity Available. The availability controls appear after a quantity is set.
Enter a number in Show Qty Remaining When Below Threshold?.
Save the ticket.
For example, if a ticket has a quantity of 100 and the threshold is 50, checkout starts showing the remaining quantity when 50 tickets are left. The message continues to update as more tickets are purchased.
Choose what happens when it sells out
Turn on Hide When Sold Out? if the ticket should disappear from checkout after the quantity is reached. Leave it off if you want the ticket to remain visible with a sold-out label. The same quantity, threshold, and sold-out controls are also available for limited add-ons and donations. For broader ticket setup guidance, see Set up tickets for your event.