Balancing Services Use of System (BSUoS) charges
The BSUoS charge recovers the cost of day-to-day operation of the transmission system. Generators and suppliers are liable for these charges, which are calculated daily as a flat tariff for all users. BSUoS charges depend on the balancing actions that we take each day, but we provide a monthly forecast of BSUoS. You can also consult historical BSUoS charges.
The methodology that calculates BSUoS is set out in Section 14 of the Connection and Use of System Code (CUSC). The monthly forecast of BSUoS is provided as part of the current Monthly Balancing Services Summary report.
For more general information about the BSUoS charging process please consult our introduction presentation:
Useful information and documents
Current BSUoS data
Historical BSUoS data - SF
Here you will find historic BSUoS data for all Settlement Final (SF) data for financial years dating back to 2001.
Historical BSUoS data - RF
Here you will find historic BSUoS data for all Reconciliation Final (RF) data for financial years dating back to 2001.
Transmission Network Use of System (TNUoS) charges recover the cost of installing and maintaining the transmission system in England, Wales, Scotland and offshore. Transmission customers pay a charge based on which geographical zone they are in, whether they are generation or supply, and the size of that generation or supply.