When do my credits renew?

Credits renew on a rolling 30 days, not on the first of the month. What you spent more than 30 days ago stops counting against your plan.

Credits you do not use do not roll over. Each period starts with your plan's amount, not a bigger pile.

Top-up credits are different: they do not renew, and they expire 12 months after you buy them. They are used after your plan's credits.