If you don’t use all of your messaging credits in a given month, the unused credits will rollover into the next month, and you’ll still have access to use them.
Unused message credits rollover for 1 month and then expire after that if unused.
For example, if you are in our 2,000 messages/month plan but only send 1,750 messages, those 250 messages will rollover and be available in the next month giving you 2,250 total messages.