We are becoming a separate company

In April 2019, the Electricity System Operator is becoming a separate company within the National Grid Group. Find out more about what this change will mean.

Charging

These pages contain details about the charges that users of the electricity transmission system have to pay, how they are calculated and what changes are currently being considered by the industry. We do not charge household consumers directly. Please contact your supplier for any domestic queries.

Charging

Balancing Services Use of System (BSUoS) charges

BSUoS recovers the cost of day-to-day operation of the transmission system. These charges apply to suppliers and generators.

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Transmission Network Use of System (TNUoS) charges

TNUoS recovers the cost of installing and maintaining the transmission system. These charges apply to suppliers and generators.

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Electricity connection charges

Connection Charges recover the cost of installing and maintaining connection assets. These charges apply to generators.

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Assistance for Areas with High Electricity Distribution Costs (AAHEDC)

AAHEDC charges recovers assistance costs for The North of Scotland which is currently the only area specified to receive assistance. These charges apply to suppliers.

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Guidance and forums

Network charging developments and Charging Futures

Our work considering a Targeted Charging Review and how we are working with Ofgem and others to ensure a coordinated approach with other network charging initiatives.

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Transmission charging methodology forum (TCMF)

Under the Connection and Use of System Code (CUSC), this forum allows regular discussion between interested parties on development of the charging methodologies.

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Charging policy and guidance

Includes open letter consultations and guidance, charging methodology policy decisions, electricity industry information guides, and Triads data.

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Connection and Use of System Code (CUSC)

The CUSC is the contractual framework for connection to, and use of, the National Electricity Transmission System (NETS).

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CUSC modifications

CUSC modification proposal forms, guidance on how to complete them, and the latest progress report and modification register. 

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