Make Recurring Ticket Non Billable by default

Hi All, is there a way to make certain recurring tickets as non billable? I have a recurring invoice already set up for maintenance for a customer but I want a ticket to generate for my techs to perform the maintenance. But there is no need to bill them for that particular ticket. I just don’t want my techs to have to remember to “uncheck” billable on the ticket themselves. Any way around that?