Capacity Allocation and Congestion Management

The CACM Regulation

The Capacity Allocation and Congestion Management (CACM) Regulation sets out rules for the implementation and operation of the EU-wide day-ahead and intraday markets. Its provisions cover:

The CACM Regulation also defines obligations for Transmission System Operators (TSOs), National Regulatory Authorities (NRAs), and ACER concerning the development of Terms and Conditions or Methodologies (TCMs), as well as describing their adoption process.

TCMs establish the technical guidelines and rules to further define the provisions outlined in the electricity market regulations. Their aim is to create a common and harmonised regulatory framework within the EU and to ensure transparency and fair practices.

This page provides an overview of the TCMs developed under the CACM Regulation and presents an indication of their implementation status.

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  • Further updates on the implementation status

    The information on the implementation status of the TCMs has been compiled by ACER on the inputs provided by NRAs. It will undergo updates as soon as the relevant monitoring is conducted. In some cases, additional information or clarifications from regulatory authorities might be needed.

CACM Regulation Terms and Conditions or Methodologies


Status of implementation

  • Fully implemented
  • Largely implemented
  • Partially implemented
  • Not implemented

EU-wide Methodologies

EU-wide methodologies are developed jointly by all TSOs or all Nominated Electricity Market Operators (NEMOs) at a pan-European level. They provide guidelines and standards that govern energy operations across all Member States.

The MCO Plan is implemented once all bidding zone borders in the internal energy market are participating in the single day-ahead coupling and single intraday coupling.

26/06/2018
 - 
16/06/2017

The determination of capacity calculation regions is implemented. A future assessment is foreseen to assess the efficiency of the current CCR determination based on information from newly implemented regional methodologies.

ACER Decision 04/2021 - 07/05/2021
07/05/2021
ACER Decision 08/2023 - 31/03/2023
31/03/2023
ACER Decision 04/2024 - 19/03/2024

The methodology is implemented.

23/10/2018
 - 
23/10/2017

The implementation deadline foresees the common grid model to become operational and available for the day-ahead and intraday time frames by June 2018. However, implementation is still ongoing.

08/05/2018
 - 
08/05/2017

The methodology is implemented.

at least 26/06/2018
 - 
24/01/2018

The methodology has been largely implemented. Implementation of certain functionalities is still pending.

ACER Decision 04/2020 - 30/01/2020
01/08/2023

The terms and conditions are implemented.

ACER Decision 37/2020 - 22/12/2020
22/12/2020

The terms and conditions are implemented.

ACER Decision 04/2017 - 14/11/2017
26/06/2018
ACER Decision 01/2023 - 10/01/2023
10/01/2023

The scheduled exchange methodologies are implemented.

at least 01/08/2023
 - 
08/02/2019
ACER Decision 10/2023 - 30/05/2023
30/08/2023

The terms and conditions are implemented.

ACER Decision 05/2020 - 30/01/2020
30/01/2020

The terms and conditions are implemented.

ACER Decision 05/2017 - 14/11/2017
26/06/2018
ACER Decision 02/2023 - 10/01/2023
10/01/2023

The implementation of the methodology is dependent on the implementation of intraday auctions. The algorithm methodology sets out the implementation of the intraday auctions to the beginning of 2023. However, the project of intraday auctions has been delayed and is now expected to go-live in June 2024.

ACER Decision 01/2019 - 24/01/2019
24/04/2019

The scheduled exchange methodologies are implemented.

at least 26/06/2018
 - 
08/02/2019

The terms and conditions are implemented in all capacity calculation regions.

ACER Decision 04/2018 - 24/04/2018
01/01/2019

Implementation is dependent on CCM implementation within CCR, and MCO function developed at the BZB. The methodology is implemented.

15/05/2017

The  implementation of different provisions is linked to the implementation of the capacity calculation methodology within their respective capacity calculation region, the implementation of IDAs and the application of cross-zonal capacity allocation for the exchange of balancing capacity or sharing of reservs, so different regions and provisions have different implementation timelines. Additionally, TSOs are required to further develop and improve some elements of the methodology.

ACER Decision 16/2023 - 21/12/2023

Regional Methodologies

Regional Methodologies are developed by relevant TSOs or NEMOs at a regional level. These regions may span multiple countries or specific geographical areas within the EU and are tailored to address the needs and dynamics of the defined areas. 

Capacity Calculation Methodology

Different regions have different implementation timelines. Some regions have already implemented the methodology, whereas some other are expected to do so.

ACER Decision 02/2019 - 21/02/2019
ACER Decision 06/2022 - 19/04/2022
01/12/2022

Different regions have different implementation timelines. Some regions have already implemented the methodology, whereas some other are expected to do so.

ACER Decision 02/2019 - 21/02/2019
01/12/2020
10/05/2021
30/06/2025
 - 
01/03/2024

Different regions have different implementation timelines. Some regions have already implemented the methodology, whereas some other are expected to do so.

17/05/2021

Different regions have different implementation timelines. Some regions have already implemented the methodology, whereas some other are expected to do so.

at least 01/08/2023
 - 
20/12/2019

Different regions have different implementation timelines. Some regions have already implemented the methodology, whereas some other are expected to do so.

16/11/2018

Different regions have different implementation timelines. Some regions have already implemented the methodology, whereas some other are expected to do so.

Immediately for the most parts, in full by 30/09/2022
 - 
24/10/2018

Different regions have different implementation timelines. Some regions have already implemented the methodology, whereas some other are expected to do so.

DA - 01/07/2021; ID - 01/10/2022
 - 
04/04/2019

Different regions have different implementation timelines. Some regions have already implemented the methodology, whereas some other are expected to do so.

30/04/2021
 - 
12/07/2018

Different regions have different implementation timelines. Some regions have already implemented the methodology, whereas some other are expected to do so.

24/07/2020
 - 
24/07/2020

Different regions have different implementation timelines. Some regions have already implemented the methodology, whereas some other are expected to do so.

24/07/2020
 - 
24/07/2020

Methodology for coordinated redispatching and countertrading

The methodology is currently being implemented in most of the regions.

ACER Decision 35/2020 - 04/12/2020
04/06/2025

The methodology is currently being implemented in most of the regions.

at least Dec 2026
 - 
07/05/2021

The methodology is currently being implemented in most of the regions.

14/07/2019
 - 
14/01/2019

The methodology is currently being implemented in most of the regions.

at least 30/09/2022
 - 
15/05/2019

The methodology is currently being implemented in most of the regions.

ACER Decision 09/2019 - 25/07/2019
01/07/2021

The methodology is currently being implemented in most of the regions.

11/01/2019

The methodology is currently being implemented in most of the regions.

at least 01/01/2024
 - 
18/05/2019

Fallback procedures

The fallback procedures are implemented in all regions.

ACER Decision 10/2018 - 27/09/2018
27/09/2018
ACER Decision 02/2021 - 30/03/2021
30/03/2021
21/03/2022

The fallback procedures are implemented in all regions.

04/03/2018
 - 
04/12/2017

The fallback procedures are implemented in all regions.

07/03/2018

The fallback procedures are implemented in all regions.

20/03/2018

The fallback procedures are implemented in all regions.

18/06/2018
 - 
18/06/2018

The fallback procedures are implemented in all regions.

18/04/2018
 - 
18/04/2018

The fallback procedures are implemented in all regions.

18/03/2022

The fallback procedures are implemented in all regions.

11/01/2018
 - 
11/01/2018

Complementary Regional Intraday Auctions

The complementary regional intraday auctions are partially implemented. Implementation is on a border per border basis.

18/04/2019

The complementary regional intraday auctions are partially implemented. Implementation is on a border per border basis.

13/05/2019

The complementary regional intraday auctions are partially implemented (see above).

13/04/2018

Methodology for redispatching and countertrading cost sharing

The methodology is currently being implemented in most of the regions along with the redispatching and countertrading methodology.

ACER Decision 30/2020 - 30/11/2020
04/06/2025

The methodology is currently being implemented in most of the regions along with the redispatching and countertrading methodology.

at least Dec 2026
 - 
10/03/2021

The methodology is currently being implemented in most of the regions along with the redispatching and countertrading methodology.

29/05/2019

The methodology is currently being implemented in most of the regions along with the redispatching and countertrading methodology.

at least 30/09/2022
 - 
15/05/2019

The methodology is currently being implemented in most of the regions along with the redispatching and countertrading methodology.

ACER Decision 31/2020 - 30/11/2020
01/07/2021

The methodology is currently being implemented in most of the regions along with the redispatching and countertrading methodology.

01/01/2022
 - 
16/12/2021

WITH NATIONAL OR BIDDING ZONE LEVEL APPROVAL

01/10/2018
01/10/2018