How do I avoid unexpected, large charges? Kelly / Updated July 03, 2018 00:17 We let you set a cap on the maximum amount of on-demand events that you can be charged for. Related articles If I lower my on-demand spending cap mid-month below this month’s existing bill, when will the new cap take effect? What will my on-demand bill be? If I want to cancel monthly billing, what happens? What happens when I run out of event capacity and a grace period is triggered? What happens if I continue to send events after my on-demand spending cap is consumed?