At Noibu, billing is based on session consumption. For each term, your company will define a session commitment, and the term's pricing is calculated by multiplying the session commitment by a set rate. However, if you exceed your session allowance, contact your Noibu CSM for a set of Buffer Sessions. Buffer Sessions are a small allowance of extra, free sessions to give you some wiggle room to accommodate the growth of your business. Typically, the amount of Buffer Sessions allowed is around 5% of the term's committed sessions.
If your company has Buffer Sessions enabled, the allowance will appear in the Session Consumption charts on the Billing page in the Company module.
If your company burns through your allowance of buffer sessions, your account may default to Flex Usage.