Balancing Services Use of System (BSUoS) charges

The BSUoS charge recovers the cost of day-to-day operation including the cost of balancing the electricity transmission system.

Who does this charge apply to?

Please note that there are exemptions to the below list.

✓ Final demand site

✓ Suppliers
✓ Directly-connected transmission demand

✕ Non-Final demand site

✕ Generators
✕ Distribution Network Operators
✕ Embedded generators
✕ Interconnectors

CMP308 and CMP361 came into effect on 1 April 2023, which changed the recovery process of BSUoS charges. CMP308 defined that BSUoS charges are recovered solely from final demand, and CMP361 introduced an ex-ante fixed BSUoS tariff.

The BSUoS fixed tariffs and BSUoS monthly forecasts are published within the BSUoS data section below.
For more details on how BSUoS is charged, see paragraph 14.31 of the Connection and Use of System Code (CUSC).

For pre-April 2023 BSUoS methodology, refer to the Introduction to BSUoS - 2019.