When customers join OVO, we take the total estimated cost they will spend for their energy in one year and divide it into 12 payments.
If they join OVO during the winter months (September onwards), we apply a winter uplift to their Direct Debit. This should ensure that at the end of the winter period they don’t end up in debt.
We will then do regular Direct Debit reviews to make sure they're paying the right amount. Here's a page to help explain the calculation: https://www.ovoenergy.com/help/direct-debit-review