Each supplier uses a review period* — this is a specific timeframe during which you can switch without any costs. This period varies depending on the supplier. Some suppliers have a review period of 6 months, while others have 2 months. The best time to switch energy suppliers is generally 6 to 8 weeks before your current energy contract ends. So, if your contract expires within the next 2 months, you can switch free of charge.
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In our Energy Saver, you can see the review period for each supplier.