NESOOFGEMDESNZ
feed

Balancing Services Use of System (BSUoS) charges | National Energy System Operator

NESO·data_release·medium·4 Mar 2026·source document

Summary

NESO publishes BSUoS charging data including fixed tariffs, monthly forecasts, and payment calendars through March 2026. BSUoS charges recover balancing costs and are paid by final demand customers only since April 2023 reforms. Current fixed tariff structure replaced variable charges following CMP308 and CMP361 implementation.

Why it matters

This is routine data publication for an established charging mechanism. The significance lies in the reformed structure — generators no longer pay BSUoS, creating a cleaner price signal where balancing costs sit entirely with demand. As such, this reduces cross-subsidies but concentrates system costs on consumers.

Key facts

  • BSUoS charges removed from generators April 2023
  • Fixed ex-ante tariffs replace variable charging
  • Payment calendar extends to March 2027
  • CMP308 and CMP361 reformed cost recovery structure

Areas affected

network chargeswholesale marketsuppliersgenerators

Related programmes

Connections Reform

Memo

What the numbers show

This is a routine data publication maintaining the reformed BSUoS framework. The current system charges only final demand customers at fixed ex-ante tariffs, completely removing generators, DNOs, and interconnectors from BSUoS liability. The March 2026 payment calendar extends the established billing cycle, while monthly forecasts continue tracking cost recovery against the fixed tariff revenue.

The reformed structure fundamentally changed BSUoS economics. Where the old system charged both generators and demand on a volatile £/MWh basis reflecting actual balancing costs, the new framework sets fixed tariffs in advance and places all cost recovery on consumption. This eliminates the price signal that generators previously received about their system impact but provides demand-side certainty.

Current tariffs 7 and 8 cover April 2026 to March 2027, following the established six-monthly review cycle. The data shows NESO maintaining its forecasting methodology with monthly outturn reports tracking actual vs projected costs. Payment calendars now extend through March 2027, indicating stable administrative processes around the fixed tariff mechanism.

Trends

BSUoS costs are increasingly disconnected from real-time system conditions due to the fixed tariff structure. Monthly forecast reports show NESO reconciling actual balancing costs against predetermined revenue targets, with any variance creating under- or over-recovery that feeds into future tariff calculations.

The charging base has narrowed significantly since April 2023. Final demand now carries the full burden of system balancing costs, removing roughly half the previous charging base. This concentration effect means demand customers face higher unit rates than under the previous shared model, while generators receive cleaner price signals in wholesale markets.

Tariff-setting has become more predictable but less responsive. The six-monthly review cycle creates stability for demand forecasting but means tariffs lag behind actual cost trends. When system costs rise due to increased renewable curtailment or frequency response requirements, demand customers continue paying historical rates until the next tariff reset.

Administrative complexity has shifted from real-time cost allocation to forecast accuracy and revenue reconciliation. NESO's monthly reporting focuses on tracking cost recovery performance rather than the previous emphasis on immediate cost pass-through.

What to watch

The fixed tariff mechanism faces its first major test during periods of extreme system stress. Winter 2026-27 will reveal how well the forecasting methodology handles volatile balancing costs when actual expenses deviate significantly from projections. Large under-recoveries could force sharp tariff increases in subsequent periods.

Demand customer resistance may emerge as BSUoS costs concentrate on consumption. Large industrials and suppliers are now the sole bearers of balancing costs that generators previously shared. This creates pressure for demand-side response and potentially drives industrial relocation decisions, particularly for high-consumption, low-margin operations.

Generator behaviour patterns will clarify as market participants fully adapt to BSUoS exemption. Removing balancing cost liability should improve investment signals for flexible generation, but may reduce incentives for generators to provide voluntary system support during tight conditions.

The interaction between BSUoS reform and other charging changes deserves attention. As TNUoS charges also concentrate increasingly on demand through ongoing reforms, the combined effect could significantly alter the economics of large consumption sites and industrial cogeneration projects.

Watch for NESO's approach to forecast accuracy as balancing costs become more volatile with higher renewable penetration. The six-monthly tariff cycle may prove too rigid if system costs shift rapidly due to weather patterns, interconnector outages, or major plant failures.

Political pressure could emerge if demand customers face sharp tariff increases following periods of high balancing costs. The reformed system makes cost recovery more visible to final consumers but removes the smoothing effect of shared generator payments, potentially creating more volatile bills that attract regulatory attention.

Source text4,449 words

[](#main-content) [![Home](https://www.neso.energy/themes/custom/neso_theme/logo.svg)](/) Please enable JavaScript to use the search interface. An error has occurred while loading the search interface. Please refresh the page. ## Data Portal * [Data Portal](/data-portal) ## User account menu * [Sign in / Register](/saml-login) Show/Hide Menu Toggle ## Main navigation * [What we do](/what-we-do) [What we do](/what-we-do) ![Solar panels in field](/sites/neso.energy/files/styles/medium_cropped/public/2024-06/Solar%20panels%20in%20field-GettyImages-1408864765.jpg?h=1ecad531&itok=KF7_t8Yo) We bring together eight activities required to deliver the plans, markets and operations of the energy system of today and the future. Bringing these activities together in one organisation encourages holistic thinking on the most cost-efficient and sustainable solutions to the needs of our customers. Back [What we do](/what-we-do) [View](/what-we-do) + [Strategic Planning](/what-we-do/strategic-planning) The SEP team work in partnership with governments, Ofgem, industry and wider stakeholders to guide Great Britain on what infrastructure and sources of electricity are required to securely accelerate the transition away from fossil fuels into new energy technologies, including renewable energy. + [Security of Supply](/what-we-do/security-supply) Security of Supply analyses where the energy we need over the short, medium and long-term will come from. In doing so it assesses a wide range of factors that could affect our supply of energy, enabling early actions and decisions to ensure we can meet future demand. + [Systems Operations](/what-we-do/systems-operations) From hospitals to households, telecoms to transportation, our society relies on electricity. Our control centre makes sure there is always a reliable and safe supply as we move megawatts around the country. + [Connections Explained](/what-we-do/connections-explained) We will deliver efficient system access for Generation and Demand projects, so that those projects that are first ready can be first served – delivering the energy system to meet net zero and facilitating economic growth by connecting new and existing industries. + [Resilience & Emergency Management](/what-we-do/resilience-emergency-management) Our energy system is complex, with an increasing number of interconnections. This means that disruption to one part can have implications for another. But this complexity also provides us with more options to mitigate problems. + [Energy Insights](/what-we-do/energy-insights) We will develop comprehensive and independent insights across the entire energy system, offering clear recommendations to policy makers, industry decision makers and leadership across our organisation on how to accelerate energy transition progress. + [Energy Markets](/what-we-do/energy-markets) Whether you’re interested in the innovation underway in the Markets team or are looking to brush up on market fundamentals, you’ve come to the right place. + [Data & AI](/what-we-do/data-ai) NESO will bring together data from multiple sources in a way that enables the modern digitalised energy system needed for a low carbon, flexible and affordable future. + [Helping our customers get ready for NESO](/what-we-do/post-neso-launch-support) * [Energy 101](/energy-101) [Energy 101](/energy-101) ![Smiling lady working at laptop](/sites/neso.energy/files/styles/medium_cropped/public/2024-06/Smiling%20lady%20working%20at%20laptop-GettyImages-1140358859.jpg?h=06f6671c&itok=JWQxbNG-) We’re experts in all things energy – how much we use, where it comes from and how it moves around Great Britain. And we want to share all that knowledge with you. Back [Energy 101](/energy-101) [View](/energy-101) + [Net zero explained](/energy-101/net-zero-explained) Confused about carbon? Need knowledge on net zero? Interested in EVs? You’ve come to the right place. + [Great Britain’s Monthly Energy Stats](/energy-101/great-britains-monthly-energy-stats) Ever wonder how much gas and electricity we use in Great Britain? View our monthly insights into which generation sources provide Great Britain's electricity and learn how much we use each month. + [Electricity explained](/energy-101/electricity-explained) We're the experts in electricity – how much we use, where it comes from, and how it travels into homes and businesses. Understanding how much electricity we consume, and which devices are most power-hungry is no easy task. + [Hydrogen explained](/energy-101/hydrogen-explained) Hydrogen is a growing part of the energy system. As NESO, we have been building our hydrogen expertise during our journey to being NESO and we would love to share it with you. + [Gas explained](/energy-101/gas-explained) Gas has been a part of Great Britain’s energy mix since the Victorian Era. At NESO, we have been supporting the UK Gas system for many years through our supply and demand forecasts. We are building our expertise in gas as we strategically plan the gas system of the future. + [Balancing the Grid - Interactive game](/energy-101/balancing-grid-interactive-game) To give you some insight into the world of balancing the grid, we’ve developed a game where you can attempt to keep the grid stable while facing some of the challenges our control room operatives experience daily. * [Industry information](/industry-information) [Industry information](/industry-information) ![Wind turbine in the sea](/sites/neso.energy/files/styles/medium_cropped/public/2024-06/Wind%20turbine%20in%20the%20sea-GettyImages-852092910.jpg?h=d1cb525d&itok=rwMAnuOI) Are you a balancing provider looking to supply services to us, trying to find the latest Grid Code, or TNUoS charging guidance? Find all the information you need including our operational data, forecasts, and reports designed to help you make efficient decisions. Back [Industry information](/industry-information) [View](/industry-information) + [Balancing costs](/industry-information/balancing-costs) Balancing costs are those costs associated with (A) the Balancing Mechanism, (B) balancing services, and (C) energy trading. + [Balancing services](/industry-information/balancing-services) We procure services to balance demand and supply and to ensure the security and quality of electricity supply across Britain's transmission system. + [Charging](/industry-information/charging) All users of the electricity transmission system pay to use it. This brief overview looks at who pays, for what, and how the charges are calculated. + [Codes](/industry-information/codes) Our team of code administrators oversees all aspects of the code modification processes and related meetings. So whether you’re new to the process, or experienced in the way it all works, we’ll help you get to the information you need. + [Connections](/industry-information/connections) In this section, we’ve got everything you need to understand the connections process. Including what you need to do to connect to, or make use of the National Electricity Transmission System (NETS). + [Connections Reform](/industry-information/connections-reform) The UK’s energy system is undergoing a fundamental transformation. To achieve the government’s Clean Power 2030 ambition and support the transition to net zero, we must reform the way projects connect to the electricity network. + [Flexibility](/industry-information/flexibility) We believe that demand side flexibility has a key role to play in operating a fully decarbonised electricity system which is reliable, affordable and fair + [Market Monitoring](/industry-information/market-monitoring "The Market Monitoring team is engaged in continuous oversight of electricity market activities to identify and address potential non-compliance issues.") + [Industry data and reports](/industry-information/industry-data-and-reports) These pages contain data and support for users of the National Electricity Transmission System (NETS). Here you will find the latest operational data, forecasts, and reports. + [Network access planning](/industry-information/network-access-planning) Our Network Access Planning engineers are responsible for assessing, co-ordinating and sanctioning the planned release of assets from the National Electricity Transmission System. + [Reformed National Pricing](/industry-information/reformed-national-pricing "Effective markets are key to delivering and operating the most efficient energy system, and it is critical that those markets are efficiently designed and implemented to deliver affordable, secure and clean energy") Effective markets are key to delivering and operating the most efficient energy system, and it is critical that those markets are efficiently designed and implemented to deliver affordable, secure and clean energy + [System Access Reform](/industry-information/system-access-reform) * [News and events](/news-and-events) [News and events](/news-and-events) All the latest news from the heart of Great Britain's electricity system. Find out how we balance the grid, how we’re innovating for the future, and who the people are that are working on Britain's energy system around the clock. Back [News and events](/news-and-events) [View](/news-and-events) * [Publications](/publications-library) [Publications](/publications-library) ![Man doing woodwork in his workshop](/sites/neso.energy/files/styles/medium_cropped/public/2024-06/Man%20doing%20woodwork%20in%20his%20workshop-GettyImages-548417453.jpg?h=dbe779b6&itok=xPIAVWwI) We've got a wide range of publications offering energy insights and analysis. Download our reports and data to see the innovative ways we are transforming the future of Great Britain’s energy. Back [Publications](/publications-library) [View](/publications-library) + [View all of our publications](/publications-library) Find a wide range of publications that provide energy insight and analysis right here, as well as information about how we're shaping the future of energy in Great Britain. + [Beyond 2030](/publications/beyond-2030) The Beyond 2030 report builds on top of the Holistic Network Design and makes a set of network recommendations throughout the 2030s. + [Future Energy Scenarios (FES)](/publications/future-energy-scenarios-fes) Future Energy Scenarios (FES) represent a range of different, credible ways to decarbonise our energy system as we strive towards the 2050 target. + [Transitional Centralised Strategic Network Plan (tCSNP)](/publications/transitional-centralised-strategic-network-plan-tcsnp) We have been enhancing our approach to planning the GB electricity transmission network through a series of transitional CSNPs. + [Clean Power 2030](/publications/clean-power-2030) Achieving clean power by 2030 whilst keeping the system secure and affordable for consumers would be a world-leading achievement. + [Electricity Ten Year Statement (ETYS)](/publications/electricity-ten-year-statement-etys) The Electricity Ten Year Statement (ETYS) is our view of future transmission requirements and the capability of Great Britain’s National Electricity Transmission System (NETS) over the next 10 years. + [GB Reduced Model](/publications/gb-reduced-model "The GB Reduced Model is a simplified representation of the National Electricity Transmission System of Great Britain, developed using DIgSILENT PowerFactory.") The GB Reduced Model is a simplified representation of the National Electricity Transmission System of Great Britain, developed using DIgSILENT PowerFactory. + [North Hyde Review](/publications/north-hyde-review "NESO publishes its interim findings from the review into the North Hyde Substation outage which took place on 20 March and led to the closure of Heathrow Airport.") NESO publishes its interim findings from the review into the North Hyde Substation outage which took place on 20 March and led to the closure of Heathrow Airport. + [Operability Strategy Report and Electricity Markets Roadmap](/publications/markets-roadmap) We are developing new ways to balance electricity supply and demand and manage a low carbon electricity system, helping to meet net zero targets and minimise costs for consumers. + [Summer Outlook](/publications/summer-outlook) Summer Outlook reports are designed to inform the energy industry and support its preparations, we also outline Great Britain’s projected electricity needs for the summer ahead. + [Winter Outlook](/publications/winter-outlook) The Winter Outlook Report presents our view of security of supply for the electricity systems for the winter ahead. + [Whole electricity system](/publications/whole-electricity-system "The journey to creating an energy system fit for the future wouldn’t be possible without close collaboration with industry partners to help the transition.") The journey to creating an energy system fit for the future wouldn’t be possible without close collaboration with industry partners to help the transition. + [System Operability Framework (SOF)](/publications/system-operability-framework-sof) The System Operability Framework (SOF) takes a holistic view of the changing energy landscape to assess the future operation of Britain's electricity networks. + [Regional Development Programmes](/publications/regional-development-programmes-rdps) RDPs look across the whole electricity system to unlock more network capacity, reduce constraints and open new revenue streams for market participants. * [Careers](/careers) [Careers](/careers) Back [Careers](/careers) [View](/careers) * [About](/about-neso) [About](/about-neso) ![Dad and son working on kitchen table](/sites/neso.energy/files/styles/medium_cropped/public/2024-07/Dad%20and%20son%20working%20on%20kitchen%20table-GettyImages-1149030800.jpg?h=9a8607c3&itok=WtMtexJg) We ensure that Great Britain has the essential energy it needs by making sure supply meets demand every second of every day. Back [About](/about-neso) [View](/about-neso) + [Strategic priorities](/about/strategic-priorities) As a new organisation we recognise our responsibility to deliver right from the start. The strategic priorities that we are driving towards can be found on this page. + [Our people](/about/our-people) We work with a whole range of experts, including engineers, academics and industry professionals so that we can safely deliver affordable and clean energy to customers. As we build a greener electricity system of the future our people know they are shaping the future for generations to come. + [A whole system challenge](/about/whole-system-challenge) + [Operational information](/about/operational-information) Want to know how we're regulated or how we're organised? Interested in our compliance statements and consultation responses? Our operational information page is where you can find all of this and more. + [European engagement](/about/european-engagement) NESO’s ongoing work with European political and industry stakeholders + [Innovation](/about/innovation) Innovation is critical to helping us meet the challenges of transitioning to a zero carbon future. As we sit at the very heart of the energy system, we play a central role in overcoming these challenges. + [Our progress towards net zero](/about/our-progress-towards-net-zero) Read the story of how the we have decarbonised the electricity system to date, offering a blueprint to other countries around the world to help them reduce emissions. + [Our projects](/about/our-projects) All of our projects contribute towards our effort to make the grid ready to operate with 100% zero carbon electricity by 2025. ## Breadcrumb 1. [Home](/) 2. [Industry information](/industry-information) 3. [Charging](/industry-information/charging) 4. Balancing Services Use of System (BSUoS) charges Add to favourites Close tooltip Sign in to add this page to your favourites [Sign in or register](/saml-login) Show favourites Close Close tooltip Sign in or register to manage your favourites [Sign in or register](/saml-login) [Help](https://www.neso.energy/help-centre) ###### In this section * [The charges for using GB's electricity system](/industry-information/charging/charges-using-great-britains-electricity-system) [The charges for using GB's electricity system](/industry-information/charging/charges-using-great-britains-electricity-system) Back [The charges for using GB's electricity system](/industry-information/charging/charges-using-great-britains-electricity-system) [View](/industry-information/charging/charges-using-great-britains-electricity-system) * [Transmission Network Use of System (TNUoS) Charges](/industry-information/charging/tnuos-charges) [Transmission Network Use of System (TNUoS) Charges](/industry-information/charging/tnuos-charges) Back [Transmission Network Use of System (TNUoS) Charges](/industry-information/charging/tnuos-charges) [View](/industry-information/charging/tnuos-charges) * [Balancing Services Use of System (BSUoS) charges](/industry-information/charging/balancing-services-use-system-bsuos-charges) [Balancing Services Use of System (BSUoS) charges](/industry-information/charging/balancing-services-use-system-bsuos-charges) Back [Balancing Services Use of System (BSUoS) charges](/industry-information/charging/balancing-services-use-system-bsuos-charges) [View](/industry-information/charging/balancing-services-use-system-bsuos-charges) * [Connection charges](/industry-information/charging/connection-charges) [Connection charges](/industry-information/charging/connection-charges) Back [Connection charges](/industry-information/charging/connection-charges) [View](/industry-information/charging/connection-charges) * [Assistance for Areas with High Electricity Distribution Costs (AAHEDC)](/industry-information/charging/assistance-areas-high-electricity-distribution-costs-aahedc) [Assistance for Areas with High Electricity Distribution Costs (AAHEDC)](/industry-information/charging/assistance-areas-high-electricity-distribution-costs-aahedc) Back [Assistance for Areas with High Electricity Distribution Costs (AAHEDC)](/industry-information/charging/assistance-areas-high-electricity-distribution-costs-aahedc) [View](/industry-information/charging/assistance-areas-high-electricity-distribution-costs-aahedc) * [Charging Futures](/industry-information/charging/charging-futures) [Charging Futures](/industry-information/charging/charging-futures) Back [Charging Futures](/industry-information/charging/charging-futures) [View](/industry-information/charging/charging-futures) * [Charging documentation](/industry-information/charging/charging-documentation) [Charging documentation](/industry-information/charging/charging-documentation) Back [Charging documentation](/industry-information/charging/charging-documentation) [View](/industry-information/charging/charging-documentation) * [Contact charging](/industry-information/charging/contact-charging) [Contact charging](/industry-information/charging/contact-charging) Back [Contact charging](/industry-information/charging/contact-charging) [View](/industry-information/charging/contact-charging) ![my-ESO-account-path](/modules/custom/eso_samlauth/images/first-login-overlay-neso.png) ## You are now signed in Visit My NESO account to view and manage your dataset subscriptions. Maybe later [Go to your account](/user/dashboard) # 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](/industry-information/codes/cusc/modifications/cmp308-removal-bsuos-charges-generation) and [CMP361](/industry-information/codes/cusc/modifications/cmp361-cmp362-bsuos-reform-introduction-ex-ante-fixed) came into effect on 1 April 2023, which changed the recovery process of BSUoS charges. [CMP308](/industry-information/codes/cusc/modifications/cmp308-removal-bsuos-charges-generation) defined that BSUoS charges are recovered solely from final demand, and [CMP361](/industry-information/codes/cusc/modifications/cmp361-cmp362-bsuos-reform-introduction-ex-ante-fixed) 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)](/industry-information/codes/connection-and-use-system-code-cusc). For pre-April 2023 BSUoS methodology, refer to the [Introduction to BSUoS - 2019](/document/137681/download). ![Single track country road through fields photo taken from above](/sites/neso.energy/files/styles/standard_promo/public/2024-07/Single%20track%20country%20road%20through%20fields%20photo%20taken%20from%20above%20GettyImages-1486256079.jpg?h=896250cc&itok=v0SWOOI4) [## Introduction to BSUoS](/document/299026/download) For general information about the BSUoS charging process, download our introduction presentation. [Download the PDF](/document/299026/download) ## Latest news and updates ### [2024/25 BSUoS fixed tariffs webinar slides](/document/283136/download) Published on 10 July 2023 ### [2024/25 BSUoS fixed tariff publication](/document/282691/download) Published on 30 June 2023 ### [2023/24 BSUoS fixed tariff webinar slides](/document/275956/download) Published on 8 February 2023 ### [2023/24 BSUoS fixed tariff publication](/document/275721/download) Published on 31 January 2023 ## Useful information and documents ### [BSUoS Payment Calendar 26-27](/document/358381/download) Published on 04 March 2026 ### [Variable direct debit form](/document/47376/download) Published on 10 February 2022 #### BSUoS data News Useful information and documents BSUoS Fixed tariffs BSUoS Monthly Forecast Current BSUoS data Prior CUSC Modification BSUoS data Current BCR data Historical BSUoS data - II Historical BSUoS data - SF Historical BSUoS data - RF News Useful information and documents BSUoS Fixed tariffs BSUoS Monthly Forecast Current BSUoS data Prior CUSC Modification BSUoS data Current BCR data Historical BSUoS data - II Historical BSUoS data - SF Historical BSUoS data - RF ## News | [Name](?order=title&sort=asc "sort by Name") | [Published Sort ascending](?order=field_publication_date&sort=asc "sort by Published") | | --- | --- | | [BSUoS Payment Calendar 26-27 v1](/document/377806/download) | 3 Mar 2026 | | [Balancing Services Use of System (BSUoS) Final Tariff 7 and 8 (Apr 26 - Mar 27) Webinar Q&A](/document/375866/download) | 22 Jan 2026 | | [Balancing Services Use of System (BSUoS) Final Tariff 7 and 8 (Apr 26 - Mar 27) Webinar Slides and Recording](/document/375861/download) | 22 Jan 2026 | | [Balancing Services Use of System (BSUoS) Final Tariff 7 and 8 (Apr 26 - Mar 27) Report - December 2025](/document/375086/download) | 29 Dec 2025 | | [BSUoS Payment Calendar 25-26 v4.1](/document/371286/download) | 5 Nov 2025 | | [BSUoS Payment Calendar 25-26 v4](/document/370671/download) | 24 Oct 2025 | | [BSUoS Payment Calendar 25-26 v3.1](/document/370381/download) | 22 Oct 2025 | | [Balancing Services Use of System (BSUOS) Draft Tariffs 7 and 8 (Apr 26 - Mar 27) - Webinar Slides and Recording](/document/369966/download) | 21 Oct 2025 | | [Balancing Services Use of System (BSUOS) Draft Tariffs 7 and 8 (Apr 26 - Mar 27) - Webinar Q&A](/document/369976/download) | 21 Oct 2025 | | [BSUoS Payment Calendar 25-26 v3](/document/369716/download) | 9 Oct 2025 | #### Pagination * [Current page 1](?page=0 "Current page") * [Page 2](?page=1 "Go to page 2") * [Page 3](?page=2 "Go to page 3") * [Page 4](?page=3 "Go to page 4") * … * [Next page](?page=1 "Go to next page") * [Last page](?page=11 "Go to last page") ## Useful information and documents | [Name](?order=title&sort=asc "sort by Name") | [Published Sort ascending](?order=field_publication_date&sort=asc "sort by Published") | | --- | --- | | [BSUoS Payment Calendar 26-27 v1](/document/377806/download) | 3 Mar 2026 | | [BSUoS Payment Calendar 25-26 v4.1](/document/371286/download) | 5 Nov 2025 | | [BSUoS Payment Calendar 25-26 v4](/document/370671/download) | 24 Oct 2025 | | [BSUoS Payment Calendar 25-26 v3.1](/document/370381/download) | 22 Oct 2025 | | [BSUoS Payment Calendar 25-26 v3](/document/369716/download) | 9 Oct 2025 | | [BSUoS Payment Calendar 25-26 v2](/document/364396/download) | 8 Jul 2025 | | [BSUoS Payment Calendar 24-25 v9](/document/351411/download) | 16 Jan 2025 | | [BSUoS Payment Calendar 24-25 v8.1](/document/351356/download) | 15 Jan 2025 | | [BSUoS Payment Calendar 24-25 v8](/document/351221/download) | 15 Jan 2025 | | [Variable Direct Debit Form](/document/47376/download) | 31 Dec 2024 | #### Pagination * [Current page 1](?page=0 "Current page") * [Page 2](?page=1 "Go to page 2") * [Page 3](?page=2 "Go to page 3") * [Next page](?page=1 "Go to next page") * [Last page](?page=2 "Go to last page") ## BSUoS Fixed tariffs | [Name](?order=title&sort=asc "sort by Name") | [Published Sort ascending](?order=field_publication_date&sort=asc "sort by Published") | | --- | --- | | [Balancing Services Use of System (BSUoS) Final Tariff 7 and 8 (Apr 26 - Mar 27) Webinar Q&A](/document/375866/download) | 22 Jan 2026 | | [Balancing Services Use of System (BSUoS) Final Tariff 7 and 8 (Apr 26 - Mar 27) Webinar Slides and Recording](/document/375861/download) | 22 Jan 2026 | | [Balancing Services Use of System (BSUoS) Final Tariff 7 and 8 (Apr 26 - Mar 27) Report - December 2025](/document/375086/download) | 29 Dec 2025 | | [Balancing Services Use of System (BSUOS) Draft Tariffs 7 and 8 (Apr 26 - Mar 27) - Webinar Slides and Recording](/document/369966/download) | 21 Oct 2025 | | [Balancing Services Use of System (BSUOS) Draft Tariffs 7 and 8 (Apr 26 - Mar 27) - Webinar Q&A](/document/369976/download) | 21 Oct 2025 | | [Balancing Services Use of System (BSUoS) Draft Tariff 7 and 8 (Apr 26 - Mar 27) Report - October 2025](/document/369526/download) | 2 Oct 2025 | | [Balancing Services Use of System (BSUOS) Tariff 7 and 8 (Apr 26 - Mar 27) Initial Forecast Report - Webinar Slides and Recording](/document/364921/download) | 16 Jul 2025 | | [Balancing Services Use of System (BSUOS) Tariff 7 and 8 (Apr 26 - Mar 27) Initial Forecast Report - Webinar Q&A](/document/364926/download) | 16 Jul 2025 | | [Balancing Services Use of System (BSUOS) Tariff 7 and 8 (Apr 26 - Mar 27) Initial Forecast Report - June 2025](/document/363656/download) | 27 Jun 2025 | | [Balancing Services Use of System (BSUoS) Tariff 6 (Oct 2025 to Mar 2026) Webinar Q&A - January 2025](/document/353121/download) | 3 Feb 2025 | #### Pagination * [Current page 1](?page=0 "Current page") * [Page 2](?page=1 "Go to page 2") * [Page 3](?page=2 "Go to page 3") * [Page 4](?page=3 "Go to page 4") * [Next page](?page=1 "Go to next page") * [Last page](?page=3 "Go to last page") ## BSUoS Monthly Forecast | [Name](?order=title&sort=asc "sort by Name") | [Published Sort ascending](?order=field_publication_date&sort=asc "sort by Published") | | --- | --- | | [BSUoS Outturn- February 2026](/document/378596/download) | 13 Mar 2026 | | [BSUoS Forecast Report - April 2026](/document/378591/download) | 13 Mar 2026 | | [BSUoS Outturn - January 2026](/document/377101/download) | 13 Feb 2026 | | [BSUoS Forecast Report - March 2026](/document/377096/download) | 13 Feb 2026 | | [BSUoS Outturn - December 2025](/document/375956/download) | 15 Jan 2026 | | [BSUoS Forecast Report - February 2026](/document/375951/download) | 15 Jan 2026 | | [BSUoS outturn - November 2025](/document/374541/download) | 15 Dec 2025 | | [BSUoS Forecast Report - January 2026](/document/374531/download) | 15 Dec 2025 | | [BSUoS Forecast Report - December 2025](/document/372091/download) | 14 Nov 2025 | | [BSUoS outturn - October 2025](/document/372071/download) | 14 Nov 2025 | #### Pagination * [Current page 1](?page=0 "Current page") * [Page 2](?page=1 "Go to page 2") * [Page 3](?page=2 "Go to page 3") * [Page 4](?page=3 "Go to page 4") * … * [Next page](?page=1 "Go to next page") * [Last page](?page=19 "Go to last page") ## Current BSUoS data | [Name](?order=title&sort=asc "sort by Name") | [Published Sort ascending](?order=field_publication_date&sort=asc "sort by Published") | | --- | --- | | [Current RF BSUoS Data](/document/102541/download) | 23 Mar 2026 | | [Current SF BSUoS Data](/document/102546/download) | 23 Mar 2026 | | [Current II BSUoS Data](/document/103066/download) | 23 Mar 2026 | | [Fixed Tariff Revenue vs Costs Report](/document/280681/download) | 20 Mar 2026 | ## CMP395 BSUoS Data | [Name](?order=title&sort=asc "sort by Name") | [Published](?order=field_publication_date&sort=asc "sort by Published") | | --- | --- | | [CMP395 SF BSUoS Data](/document/270431/download) | 3 May 2023 | | [CMP395 II BSUoS Data](/document/268771/download) | 13 Apr 2023 | ## CMP381 BSUoS Data | [Name](?order=title&sort=asc "sort by Name") | [Published Sort ascending](?order=field_publication_date&sort=asc "sort by Published") | | --- | --- | | [CMP381 SF BSUoS Data](/document/232481/download) | 13 May 2022 | | [CMP381 II BSUoS Data](/document/232781/download) | 11 Apr 2022 | ## CMP345/350 BSUoS data | [Name](?order=title&sort=asc "sort by Name") | [Published Sort ascending](?order=field_publication_date&sort=asc "sort by Published") | | --- | --- | | [CMP345/350 SF BSUoS Data](/document/173321/download) | 17 Nov 2020 | | [CMP345/350 II BSUoS Data](/document/172586/download) | 2 Nov 2020 | ## Current BCR data | [Name](?order=title&sort=asc "sort by Name") | [Published Sort ascending](?order=field_publication_date&sort=asc "sort by Published") | | --- | --- | | [2024-06-17 BCRNEW](/document/320061/download) | 17 Jun 2024 | | [2024-06-14 BCRNEW](/document/319961/download) | 14 Jun 2024 | | [2024-06-13 BCRNEW](/document/319946/download) | 13 Jun 2024 | | [2024-06-12 BCRNEW](/document/319906/download) | 12 Jun 2024 | | [2024-06-11 BCRNEW](/document/319821/download) | 11 Jun 2024 | | [2024-06-10 BCRNEW](/document/319731/download) | 10 Jun 2024 | | [2024-06-07 BCRNEW](/document/319636/download) | 7 Jun 2024 | | [2024-06-06 BCRNEW](/document/319546/download) | 6 Jun 2024 | | [2024-06-05 BCRNEW](/document/319476/download) | 5 Jun 2024 | | [2024-06-04 BCRNEW](/document/319431/download) | 4 Jun 2024 | #### Pagination * [Current page 1](?page=0 "Current page") * [Page 2](?page=1 "Go to page 2") * [Page 3](?page=2 "Go to page 3") * [Page 4](?page=3 "Go to page 4") * … * [Next page](?page=1 "Go to next page") * [Last page](?page=115 "Go to last page") ## Historical BSUoS data - II | [Name](?order=title&sort=asc "sort by Name") | [Published Sort ascending](?order=field_publication_date&sort=asc "sort by Published") | | --- | --- | | [2024-2025 II](/document/359281/download) | 17 Apr 2025 | | [2023-2024 II](/document/316241/download) | 11 Apr 2024 | | [2022-2023 II](/document/278961/download) | 19 Apr 2023 | | [2021-2022 II](/document/267476/download) | 21 Sep 2022 | | [2020-2021 II](/document/243456/download) | 21 Feb 2022 | | [2019-2020 II](/document/183926/download) | 6 Jan 2021 | | [2018-2019 II](/document/183916/download) | 6 Jan 2021 | | [2017-2018 II](/document/125166/download) | 3 Sep 2018 | ## Historical BSUoS data - SF | [Name](?order=title&sort=asc "sort by Name") | [Published Sort ascending](?order=field_publication_date&sort=asc "sort by Published") | | --- | --- | | [2024-2025 SF](/document/359851/download) | 1 May 2025 | | [2023-2024 SF](/document/317256/download) | 25 Apr 2024 | | [2022-2023 SF](/document/279551/download) | 28 Apr 2023 | | [2021-2022 SF](/document/267481/download) | 21 Sep 2022 | | [2020-2021 SF](/document/232201/download) | 24 Jan 2022 | | [2019-2020 SF](/document/232196/download) | 24 Jan 2022 | | [2018-2019 SF](/document/232181/download) | 24 Jan 2022 | | [2017-2018 SF](/document/124021/download) | 3 Sep 2018 | | [2016-2017 SF](/document/104296/download) | 4 Jan 2018 | | [2015-2016 SF](/document/47536/download) | 21 Jan 2017 | #### Pagination * [Current page 1](?page=0 "Current page") * [Page 2](?page=1 "Go to page 2") * [Page 3](?page=2 "Go to page 3") * [Next page](?page=1 "Go to next page") * [Last page](?page=2 "Go to last page") ## Historical BSUoS data - RF | [Name](?order=title&sort=asc "sort by Name") | [Published Sort ascending](?order=field_publication_date&sort=asc "sort by Published") | | --- | --- | | [2023-2024 RF](/document/362246/download) | 4 Jun 2025 | | [2022-2023 RF](/document/320311/download) | 24 Jun 2024 | | [2021-2022 RF](/document/292426/download) | 30 Oct 2023 | | [2020-2021 RF](/document/277316/download) | 10 Mar 2023 | | [2019-2020 RF](/document/232216/download) | 24 Jan 2022 | | [2018-2019 RF](/document/232211/download) | 24 Jan 2022 | | [2017-2018 RF](/document/232206/download) | 24 Jan 2022 | | [2016-2017 RF](/document/124026/download) | 3 Sep 2018 | | [2015-2016 RF](/document/104301/download) | 4 Jan 2018 | | [2014-2015 RF](/document/47461/download) | 4 Jun 2017 | #### Pagination * [Current page 1](?page=0 "Current page") * [Page 2](?page=1 "Go to page 2") * [Page 3](?page=2 "Go to page 3") * [Next page](?page=1 "Go to next page") * [Last page](?page=2 "Go to last page") ### [Forecast volumes and costs](/industry-information/industry-data-and-reports/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](/industry-information/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](https://data.nationalgrideso.com/data-groups/balancing) 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](/industry-information/charging/charging-documentation) [![Happy couple on dog walk in field](/sites/neso.energy/files/styles/tile_large/public/2024-07/Happy%20couple%20on%20dog%20walk%20in%20field-GettyImages-2151901690.jpg?h=06f6671c&itok=T7G55yOn)](/industry-information/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](/industry-information/charging/contact-charging) [![Person pluggin their EV car in to charge](/sites/neso.energy/files/styles/tile_large/public/2024-07/Person%20pluggin%20their%20EV%20car%20in%20to%20charge-GettyImages-1600917511.jpg?h=06f6671c&itok=4wx5aVkt)](/industry-information/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](https://neso.createsend.com/h/d/918820CF9659BD06) [![Older lady sat in armchair with cushion on her lap on cushion is a cat](/sites/neso.energy/files/styles/tile_large/public/2024-07/Older%20lady%20sat%20in%20armchair%20with%20cushion%20on%20her%20lap%20one%20cushion%20is%20a%20cat-GettyImages-535016399%20%281%29_0.jpg?h=a1c4a234&itok=vNYZSTsO)](https://neso.createsend.com/h/d/918820CF9659BD06) Join our mailing list to receive publication updates, invitations to our forums, webinars and workshops, and links to our latest guidance materials. ## Footer * [About NESO](/about-neso) + [Who we are](/about/our-people) + [Operational information](/about/operational-information) + [Careers](/careers) + [Applications, portals and APIs](/applications-portals-and-apis) * [Contact us](/contact-us) + [How to report a power cut](/energy-outages) + [Help centre](https://portal.nationalenergyso.com/nesoHelpCentre/s/) + [Media centre](/news-and-events/media-centre) * [Corporate information](/corporate-information) + [Suppliers](/suppliers) + [Freedom of Information and Environmental Information Regulations](/corporate-information/freedom-information-and-environmental-information-regulations) + [Modern Slavery Statement](/corporate-information/modern-slavery-statement) + [Public Sector Equality Duty (PSED)](/corporate-information/public-sector-equality-duty-psed) ## Site * [Accessibility](/accessibility) * [Privacy notice](/privacy-notice) * [Cookie policy](/cookie-policy) * [Terms and Conditions](/terms-and-conditions) * [Security](/security) * [Responsible Disclosure](/responsible-disclosure) ## Social * [Twitter](https://x.com/NESO_energy) * [LinkedIn](https://www.linkedin.com/company/neso-energy) * [YouTube](https://www.youtube.com/%40NESO_energy) ![](/themes/custom/neso_theme/icons/logo-secondary.svg) logo--facebook