Martin Lewis warns that some UK energy suppliers apply a “49-day rule” that can affect when customers switch tariffs or suppliers. He says the rule is relevant for households with energy accounts from companies including Octopus, E.ON, OVO and other brands referenced by outlets, as people face rising bills.

The issue centres on how long customers may need to stay within certain tariff periods after a change begins, and how early exits can trigger charges. Lewis frames the warning around the possibility of an “exit penalty” if customers leave during a window defined by the rule. Coverage highlights that the exact impact depends on each supplier’s terms, including the timing of customer moves and tariff contracts.

Together, the reports present Lewis’s advice as a caution to check contract conditions before switching or cancelling energy arrangements, particularly during periods of high costs. Both outlets present the warning as timely guidance for consumers trying to manage household energy spending.