How does the Nuclear Regulated Asset Base impact your bill?
What is the Nuclear Regulated Asset Base (RAB)?
Update – 14th August 2025
Following the decision to support Sizewell C with a £14.2bn investment, the Government needs to start recovering this from consumers. Therefore, the Nuclear RAB has been initiated.
On the 12th August 2025, the Low Carbon Contracts Company confirmed the Nuclear RAB rate at £3.455/MWh for 1st November 2025 to 31st December 2025. This charge will be updated quarterly.
The Nuclear Regulated Asset Base (RAB) scheme will be introduced to help fund future nuclear projects – and this will become a charge on your electricity bill.
What is this about?
Introduced as part of the Nuclear Energy (Financing) Act 2022, the Nuclear RAB is designed to support design, construction, commissioning and operation costs of new nuclear projects – starting with the Sizewell C nuclear site in Suffolk.
All suppliers will be required to fund the Nuclear RAB arrangements through the Supplier Obligation mechanism – which also funds the Contracts for Difference (CfD) scheme – based on their market share. The cost of this mechanism is reflected in the non-commodity element of consumer bills.
What does this mean for me?
Although the Nuclear RAB follows a similar structure to CfD, there is a key difference between the two schemes: CfD participants are already generating electricity, while RAB costs are going to be reflected in consumer bills from the construction phase.
When is this happening?
There is no current start date for the Nuclear RAB due to ongoing investor conversations, which could mean the scheme does not begin until mid-2026.
However, due to the nature of the mechanism to fund the scheme, the Nuclear RAB will begin to appear as an additional cost on your electricity bill soon after launch.
How can Inspired help?
Although further details are yet to be published about the Nuclear RAB, we will continue to monitor the situation.
However, it’s never too early to begin allocating for foreseeable costs. If you have any questions about the impacts of this scheme or any other non-commodity costs on your billing, please contact the Inspired team on 01772 689250 or email us at [email protected]
