Hi Victor, thank you for your review. To confirm, the direct debit would be amended one month after your tariff has renewed. This is because the renewal window would remain open up until the day before your direct debit is due, and as we require a minimum of five working days to amend a direct debit, this change would not be in place before the tariff expires. Your new direct debit will commence from your next payment date. Thank you, Utility Point.