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
| Name | Published Sort ascending |
|---|---|
| BSUoS Payment Calendar 24-25 v7 | 16 Aug 2024 |
| BSUoS Fixed Tariff 5 and Draft Tariff 6 Webinar - June 2024 v1 | 29 Jul 2024 |
| BSUoS Payment Calendar 24-25 v6 | 1 Jul 2024 |
| BSUoS Fixed Tariff 5 and Draft Tariff 6 - June 2024 v1 | 28 Jun 2024 |
| BSUoS Payment Calendar 24-25 v5 | 10 Jun 2024 |
| BSUoS Payment Calendar 24-25 v4 | 20 May 2024 |
| BSUoS Payment Calendar 24-25 v3 | 13 May 2024 |
| BSUoS - Forecast Model, Revenue vs Costs and Tariff Updates Webinar Q&A v1.0 | 2 May 2024 |
| BSUoS - Forecast Model, Revenue vs Costs and Tariff Updates Webinar v1.0 | 26 Apr 2024 |
| BSUoS Payment Calendar 24-25 v2 | 22 Apr 2024 |
Useful information and documents
| Name | Published Sort ascending |
|---|---|
| BSUoS Payment Calendar 24-25 v7 | 16 Aug 2024 |
| BSUoS Payment Calendar 24-25 v6 | 1 Jul 2024 |
| BSUoS Payment Calendar 24-25 v5 | 10 Jun 2024 |
| BSUoS Payment Calendar 24-25 v4 | 20 May 2024 |
| BSUoS Payment Calendar 24-25 v4 | 20 May 2024 |
| BSUoS payment calendar 24-25 v3 | 13 May 2024 |
| BSUoS Payment Calendar 24-25 v3 | 13 May 2024 |
| BSUoS - Forecast Model, Revenue vs Costs and Tariff Updates Webinar Q&A v1.0 | 2 May 2024 |
| BSUoS - Forecast Model, Revenue vs Costs and Tariff Updates Webinar v1.0 | 26 Apr 2024 |
| BSUoS Payment Calendar 24-25 v2 | 22 Apr 2024 |
BSUoS Fixed tariffs
BSUoS Monthly Forecast
| Name | Published Sort ascending |
|---|---|
| BSUoS Forecast Report - December 2024 | 15 Nov 2024 |
| BSUoS outturn - October 2024 | 15 Nov 2024 |
| BSUoS outturn - September 2024 | 13 Nov 2024 |
| BSUoS Forecast Report - November 2024 | 15 Oct 2024 |
| BSUoS outturn - August 2024 | 30 Sep 2024 |
| BSUoS Forecast Report - October 2024 | 13 Sep 2024 |
| BSUoS outturn - July 2024 | 16 Aug 2024 |
| BSUoS Forecast Report - September 2024 | 16 Aug 2024 |
| BSUoS Forecast Report - August 2024 | 16 Jul 2024 |
| BSUoS Forecast Report - June 2024 V2 | 16 Jul 2024 |
Current BSUoS data
| Name | Published Sort ascending |
|---|---|
| Current SF BSUoS Data | 20 Nov 2024 |
| Current II BSUoS Data | 20 Nov 2024 |
| Current RF BSUoS Data | 20 Nov 2024 |
| Fixed Tariff Revenue vs Costs Report | 15 Nov 2024 |
CMP395 BSUoS Data
CMP381 BSUoS Data
| Name | Published Sort ascending |
|---|---|
| CMP381 SF BSUoS Data | 13 May 2022 |
| CMP381 II BSUoS Data | 11 Apr 2022 |
CMP345/350 BSUoS data
| Name | Published Sort ascending |
|---|---|
| CMP345/350 SF BSUoS Data | 17 Nov 2020 |
| CMP345/350 II BSUoS Data | 2 Nov 2020 |
Current BCR data
| Name | Published Sort ascending |
|---|---|
| 2024-06-17 BCRNEW | 17 Jun 2024 |
| 2024-06-14 BCRNEW | 14 Jun 2024 |
| 2024-06-13 BCRNEW | 13 Jun 2024 |
| 2024-06-12 BCRNEW | 12 Jun 2024 |
| 2024-06-11 BCRNEW | 11 Jun 2024 |
| 2024-06-10 BCRNEW | 10 Jun 2024 |
| 2024-06-07 BCRNEW | 7 Jun 2024 |
| 2024-06-06 BCRNEW | 6 Jun 2024 |
| 2024-06-05 BCRNEW | 5 Jun 2024 |
| 2024-06-04 BCRNEW | 4 Jun 2024 |
Historical BSUoS data - II
| Name | Published Sort ascending |
|---|---|
| 2023-2024 II | 11 Apr 2024 |
| 2022-2023 II | 19 Apr 2023 |
| 2021-2022 II | 21 Sep 2022 |
| 2020-2021 II | 21 Feb 2022 |
| 2019-2020 II | 6 Jan 2021 |
| 2018-2019 II | 6 Jan 2021 |
| 2017-2018 II | 3 Sep 2018 |
Historical BSUoS data - SF
| Name | Published Sort ascending |
|---|---|
| 2023-2024 SF | 25 Apr 2024 |
| 2022-2023 SF | 28 Apr 2023 |
| 2021-2022 SF | 21 Sep 2022 |
| 2018-2019 SF | 24 Jan 2022 |
| 2020-2021 SF | 24 Jan 2022 |
| 2019-2020 SF | 24 Jan 2022 |
| 2017-2018 SF | 3 Sep 2018 |
| 2016-2017 SF | 4 Jan 2018 |
| 2015-2016 SF | 21 Jan 2017 |
| 2014-2015 SF | 20 Jan 2017 |
Historical BSUoS data - RF
| Name | Published Sort ascending |
|---|---|
| 2022-2023 RF | 24 Jun 2024 |
| 2021-2022 RF | 30 Oct 2023 |
| 2020-2021 RF | 10 Mar 2023 |
| 2018-2019 RF | 24 Jan 2022 |
| 2017-2018 RF | 24 Jan 2022 |
| 2019-2020 RF | 24 Jan 2022 |
| 2016-2017 RF | 3 Sep 2018 |
| 2015-2016 RF | 4 Jan 2018 |
| 2014-2015 RF | 4 Jun 2017 |
| 2013-2014 RF | 3 Jun 2017 |
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.
More from charging
Charging documentation
Our charging documentation page is where you can now find all of our charging statements and policy developments along with all the guidance documents and webinars you need if you're new to charging.
Contact charging
Submit a query through our webform, get involved through forums and steering groups, or reach out to the relevant charging team.
Join our mailing list
Join our mailing list to receive publication updates, invitations to our forums, webinars and workshops, and links to our latest guidance materials.