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
BSUoS Charge
CMP308 and CMP361 came into effect on 1 April 2023, which changed the way BSUoS charges were recovered. 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, please go to paragraph 14.31 of the Connection and Use of System Code (CUSC).
For pre-April 2023 BSUoS Methodology, please refer to the Introduction to BSUoS - 2019 document.
Introduction to BSUoS
For more general information about the BSUoS charging process, please consult 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
2023/24 BSUoS payment calendar - V2
Published on 21 March 2023
BPA_File specs for DAT Format_CMP3087_361
Published on 25 April 2023
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 23-24 v2 | 2 Oct 2023 |
| 2024-25 BSUoS Fixed Tariffs Webinar Q and A - 7th July 2023 | 10 Jul 2023 |
| BSUoS Fixed Tariff Webinar Slides - 7th July 2023 | 10 Jul 2023 |
| BSUoS Fixed Tariff 2024-25 - Tariff Publication - 30 June 2023 | 30 Jun 2023 |
| BSUoS Fixed Tariff Webinar Slides and Recording - 5th April 2023 | 13 Apr 2023 |
| Final BSUoS Fixed Tariff 2023-24 Webinar Slides | 8 Feb 2023 |
| Final BSUoS Fixed Tariff 2023-24 | 31 Jan 2023 |
| Draft BSUoS Fixed Tariff Webinar - Q and A | 25 Nov 2022 |
| Draft BSUoS Fixed Tariff Webinar Slides | 23 Nov 2022 |
| Draft BSUoS FIxed Tariff 2023-24 | 11 Nov 2022 |
Useful information and documents
| Name | Published Sort ascending |
|---|---|
| ESO BSUoS SFTP Connection Instructions | 1 Nov 2023 |
| BSUoS Payment Calendar 23-24 v2 | 2 Oct 2023 |
| BPA_File Specs for DAT Format_CMP308_361 | 25 Apr 2023 |
| BSUoS Fixed Tariff Model Consultation 2 - Webinar Slides August 2022 | 16 Aug 2022 |
| BSUoS Fixed Tariff Model Consultation - Webinar Q and A June 2022 | 1 Jul 2022 |
| Variable Direct Debit Form | 10 Feb 2022 |
| BSUoS Payment Calendar 2021-22 v9 | 7 Dec 2021 |
| Introduction to BSUoS Charges | 5 Feb 2019 |
| SFTP Connection Instructions for Retrieving BPA and BCR Reports for BSUoS | 15 Jun 2018 |
| Name | Published Sort ascending |
|---|---|
| 2024-25 BSUoS Fixed Tariffs Webinar Q and A - 7th July 2023 | 10 Jul 2023 |
| BSUoS Fixed Tariff Webinar Slides - 7th July 2023 | 10 Jul 2023 |
| BSUoS Fixed Tariff 2024-25 - Tariff Publication - 30 June 2023 | 30 Jun 2023 |
| BSUoS Fixed Tariff Webinar Slides and Recording - 5th April 2023 | 13 Apr 2023 |
| Final BSUoS Fixed Tariff 2023-24 Webinar Slides | 8 Feb 2023 |
| Final BSUoS Fixed Tariff 2023-24 | 31 Jan 2023 |
| Draft BSUoS Fixed Tariff Webinar - Q and A | 25 Nov 2022 |
| Draft BSUoS Fixed Tariff Webinar Slides | 23 Nov 2022 |
| Draft BSUoS FIxed Tariff 2023-24 | 11 Nov 2022 |
| BSUoS Fixed Tariff Model Consultation - Webinar Slides June 2022 | 30 Jun 2022 |
BSUoS Monthly Forecast
Here you find the forecast monthly BSUoS costs
| Name | Published Sort ascending |
|---|---|
| BSUoS Forecast Report - Dec 2023 | 16 Nov 2023 |
| BSUoS Outturn Chart and Commentary October 2023 | 16 Nov 2023 |
| BSUoS Outturn Chart and Commentary September 2023 | 13 Oct 2023 |
| BSUoS Forecast Report - Nov 2023 | 13 Oct 2023 |
| BSUoS Outturn Chart and Commentary August 2023 | 15 Sep 2023 |
| BSUoS Forecast October 2023 | 15 Sep 2023 |
| BSUoS Outturn Chart and Commentary July 2023-Revised | 29 Aug 2023 |
| BSUoS Forecast September 2023 | 15 Aug 2023 |
| BSUoS Outturn Chart and Commentary July 2023 | 15 Aug 2023 |
| BSUoS Outturn Chart and Commentary June 2023 | 1 Jul 2023 |
Current BSUoS data
| Name | Published Sort ascending |
|---|---|
| Current SF BSUoS Data | 11 Dec 2023 |
| Current II BSUoS Data | 11 Dec 2023 |
| Current RF BSUoS Data | 11 Dec 2023 |
| Fixed Tariff Revenue vs Costs Report | 8 Dec 2023 |
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 |
|---|---|
| 2023-12-11 BCRNEW | 11 Dec 2023 |
| 2023-12-08 BCRNEW | 8 Dec 2023 |
| 2023-12-07 BCRNEW | 7 Dec 2023 |
| 2023-12-06 BCRNEW | 6 Dec 2023 |
| 2023-12-05 BCRNEW | 5 Dec 2023 |
| 2023-12-04 BCRNEW | 4 Dec 2023 |
| 2023-12-01 BCRNEW | 1 Dec 2023 |
| 2023-11-30 BCRNEW | 30 Nov 2023 |
| 2023-11-29 BCRNEW | 29 Nov 2023 |
| 2023-11-28 BCRNEW | 28 Nov 2023 |
Historical BSUoS data - II
| Name | Published Sort ascending |
|---|---|
| 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 |
|---|---|
| 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 |
| 2013-2014 SF | 18 Jan 2017 |
Historical BSUoS data - RF
Here you will find historic BSUoS data for all Reconciliation Final (RF) data for financial years dating back to 2001.
| Name | Published Sort ascending |
|---|---|
| 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 |
| 2012-2013 RF | 2 Jun 2017 |
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.
Contains data and support for users of the National Electricity Transmission System (NETS). Here you will find the latest operational data, forecasts, and reports.
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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