The Nuclear Regulated Asset Base (RAB) levy

Nuclear RAB charges are a regulated cost to fund the building of new nuclear power stations in the UK. The government introduced this scheme so that investment costs are shared gradually with customers rather than being paid all at once after construction. These charges support long-term, reliable energy generation.

Yes. The nuclear RAB charge is a recent regulatory change introduced by the UK government and approved by Ofgem. It’s designed to support future low-carbon power generation.

You may notice that the cost (price) of the published Nuclear RAB levy is currently £3.455 per MWh (approx.). This levy is a variable non-commodity cost that is applicable to all energy used to supply your site. This includes the energy you actually use and the energy that is lost through the process of distribution around the grid.

Yü Energy, the supplier of this energy, will be accounting for the lost electricity by a slight adjustment to the cost of the levy. This may mean that what you see on your invoice may be higher than the published cost.

As this is a variable non-commodity cost, the current published rate is subject to change.

Ofgem approved the inclusion of a small nuclear RAB charge on energy bills to help fund the construction of new nuclear capacity. This means customers contribute a modest amount towards future low-carbon energy infrastructure.

If your contract was signed on or before 13^th of August your February 2026 bill will show an additional back dated RAB Charge from December 2025. This wasn’t included in your December bill.  From March, all future RAB fees will reflect the month you are being billed for.

If your contract was signed on or after 14^th August, RAB has been included in your unit price and will not see this itemised on your bill.

No. You are contributing to funding future nuclear capacity, but the actual day-to-day cost of the energy you use is still priced based on what you agreed in your Yü Energy Contract. The nuclear RAB charge is a separate and a regulated cost item that transparently shows how much goes toward a long-term energy infrastructure.

The main exception to the RAB levy is for businesses with an Energy Intensive Industries (EII) exemption.

Ofgem (the UK energy regulator) sets the allowed annual revenue that can be recovered through the nuclear RAB charge. Energy suppliers then collect the charge on behalf of the industry and pass it on to customers.

No. The charge is permanent and non-refundable. However, the level of the charge can be reviewed and adjusted by Ofgem over time.

No. This is a regulated charge required by UK energy policy and Ofgem. All eligible customers must pay it.

No. This is a regulated charge required by UK energy policy and Ofgem. All eligible customers must pay it. As part of your Terms and Conditions, the result of any changes to the Act or any other legislation or industry regulations which determine the price of the utilities are passed to the contract holder.