What happens when I run out of seats?

Invites are simply blocked until you buy add-on seats or remove a member — your bill never grows on its own.

Your bill never grows on its own — it’s block-and-buy. When every seat is taken, new invites are simply blocked until you make room, and nothing is charged and no one loses access until you decide to add seats. To fit another teammate you either buy add-on seats or remove a member or pending invite on the Team tab. (On an operator-provisioned or contract plan, seats are arranged through support rather than self-serve.)