WP.pro differentiates between metered and unmetered services when billing for services used.
Unmetered Services (Subscribed Plan)
Your subscribed plan for a space (the subscription) is billed automatically every month in advance using the payment method on file.
Metered Services (Additional Services)
Metered services can include:
Addons added to a site (such as performance enhancements)
Overuse of included traffic, storage, etc.
These metered services are billed in arrears. For example, the invoice dated 06/01/2024 will include the metered services from 05/01/2024 to 05/31/2024.