Question to the Department for Energy Security & Net Zero:

To ask the Secretary of State for Energy Security and Net Zero, whether he plans to require energy suppliers to pay interest on significant customer credit balances held for extended periods.

In the year to June 2025, Ofgem data shows that there has been a fall by around £500m of credit balances held by suppliers (Domestic Energy Customer Credit Balances, July 2024 to June 2025 | Ofgem)

Customers may challenge increased direct debit payment amounts with their supplier if they disagree with it and ask the supplier to justify how they calculated the new amount. Suppliers must explain clearly how they reached the figure they want to charge and give the meter readings they used. If a customer is not happy with the supplier’s calculation, they can ask the supplier to lower the monthly payments to reflect the energy use more accurately.

Additionally, if a customer is concerned about the size of a credit balance on their energy account, they can ask their supplier to refund it. Suppliers must do this promptly unless there are reasonable grounds not to and the supplier must explain the reasons for not doing so.