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.
Introduction to BSUoS
For general information about the BSUoS charging process, download our introduction presentation.
Latest news and updates
2024/25 BSUoS fixed tariffs webinar slides
Published on 10 July 2023
2024/25 BSUoS fixed tariff publication
Published on 30 June 2023
2023/24 BSUoS fixed tariff webinar slides
Published on 8 February 2023
2023/24 BSUoS fixed tariff publication
Published on 31 January 2023
Useful information and documents
2024/25 BSUoS payment calendar - V7
Published on 16 August 2024
BPA_File specs for DAT Format_CMP3087_361
Published on 25 April 2023
Variable direct debit form
Published on 10 February 2022
SFTP connection instructions for retrieving BPA and BCR reports for BSUoS
Step by step instructions on retrieving your BSUoS BPA and BCR
BSUoS data
News
Useful information and documents
BSUoS Fixed tariffs
BSUoS Monthly Forecast
| Name | Published Sort ascending |
|---|---|
| BSUoS Report Sep 2019 Data | 18 Sep 2019 |
| BSUoS Report Aug 2019 | 15 Aug 2019 |
| BSUoS Report Aug 2019 Data | 15 Aug 2019 |
| BSUoS Report Jul 2019 | 15 Jul 2019 |
| BSUoS Report Jul 2019 Data | 11 Jul 2019 |
| BSUoS Report Jun 2019 Data | 19 Jun 2019 |
| BSUoS Report Jun 2019 | 13 Jun 2019 |
| BSUoS Report May 2019 | 14 May 2019 |
| BSUoS Report May 2019 Data | 14 May 2019 |
| BSUoS Report April 2019 | 12 Apr 2019 |
Current BSUoS data
CMP395 BSUoS Data
CMP381 BSUoS Data
CMP345/350 BSUoS data
Current BCR data
| Name | Published Sort ascending |
|---|---|
| 2023-11-08 BCRNEW | 8 Nov 2023 |
| 2023-11-07 BCRNEW | 7 Nov 2023 |
| 2023-11-06 BCRNEW | 6 Nov 2023 |
| 2023-11-03 BCRNEW | 3 Nov 2023 |
| 2023-11-02 BCRNEW | 2 Nov 2023 |
| 2023-11-01 BCRNEW | 1 Nov 2023 |
| 2023-10-31 BCRNEW | 31 Oct 2023 |
| 2023-10-30 BCRNEW | 30 Oct 2023 |
| 2023-10-27 BCRNEW | 27 Oct 2023 |
| 2023-10-26 BCRNEW | 26 Oct 2023 |
Historical BSUoS data - II
Historical BSUoS data - SF
Historical BSUoS data - RF
Forecast volumes and costs
Breakdown of operating margin (OPMR), based on forecast volume of reserve, forecast volume of frequency response required, annual weighting factors for STOR contracts, and forecasts of BSUoS charges.
Industry Data and Reports
Contains data and support for users of the National Electricity Transmission System (NETS). Here you will find the latest operational data, forecasts, and reports.
Data Portal
Use the ESO Data Portal to gain access to BSUoS Charges and Balancing Costs related datasets that are geared towards API compatibility, providing additional flexibility to end users.
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