The Nuclear RAB levy is a new government-mandated charge that came into effect on 1 December 2025. It is set through the Low Carbon Contracts Company (LCCC) and applies to all licensed electricity suppliers.
The levy helps fund new nuclear infrastructure in the UK, including Sizewell C, a power station currently under construction in Suffolk.
Unlike previous nuclear projects, where investors only recovered costs once electricity was generated, this uses the Regulated Asset Base (RAB) model. That means some costs are collected earlier, while the project is still being built.
For Q4 2025, the rate is £3.494 per MWh, applied based on your actual electricity usage. You’ll first see this charge appear on your January 2026 bill.
If you have any questions about the Nuclear RAB levy, contact us at [email protected].