Test Header

Capacity Allocation and Congestion Management (CACM)

View the CACM published regulation

​​​​​​​​​​CACM sets out the methods for allocating capacity in day-ahead and intra-day timescales and outlines the way in which capacity will be calculated across the different zones. Putting in place harmonised cross border markets in all timeframes will lead to a more efficient European market and will benefit customers. These rules will provide the basis for the implementation of a single energy market across Europe.

CACM was the second network code to be developed by ENTSO-E and represents an important step in implementing a ‘Target Model’ for the design of European electricity markets. It has been developed through an open and transparent process involving stakeholders at every stage and therefore reflects a broad range of views.

CACM entered into force in August 2015. The entry into force of the CACM guideline marks the start of the formal implementation period, during which Europeans including Member States, ENTSO-E, TSOs, regulators, power exchanges, market participants will collaborate to develop the methodologies and tools described in CACM. Go to the dedicated section for more information on implementation projects and how stakeholders can be involved.

View the CACM published regulation


The network codes and related guidelines have been developed to help realise Europe's three energy policy goals – of ensuring security of supply; creating a competitive Internal Electricity Market; and decarbonising the electricity sector. For this to happen, the network codes and related guidelines will be implemented and complied with across Europe.

Each code requires a series of steps to be taken before they can enter into force. This could be national decisions, the conclusion of regional agreements or the creation of more detailed methodologies. All market participants, DSOs, TSOs and regulators will be involved and there will be extensive development work and consultation required.

CACM sets out rules for calculating cross-border capacity, defining and reviewing bidding zones and operating day ahead and intraday markets. Many of the subjects included in the CACM are highly complex and there is relatively little operational experience on which to draw from (for example the flow-based method of capacity calculation). For this reason, CACM requires additional work and a series of methodologies to be jointly developed and approved by regulators after the code enters into force.

Related Documents

​24/07/2015 ​Final Commission Regulation establishing a guideline on capacity allocation and congestion management​
​05/12/2014 ​Final draft Commission Regulation establishing a Guideline on CACM
​​29/07/14Preliminary service-level draft sent by DG ENER to the Electricity Cross Border Committee
​27/09/12Final ENTSO-E's Draft CACM Network Code
​08/02/13ENTSO-E’s response to ACER’s reasoned opinion on CACM
​18/03/13ENTSO-E’s letter to the European Commission
​18-19/03/13ACER’s recommendation on the CACM Network Code
​18-19/03/13ACER’s specific amendments to the CACM Network Code
​19/09/11EC request for ENTSO-E to start drafting the CACM NC
​29/07/11ACER Framework Guidelines on CACM
​15/07/11ENTSO-E explanatory note on the CACM development
 An overview of the latest developments for all network codes is available.

Events Archive
The tables below will serve as an archive for reference purposes of all previously released material and stakeholder meetings that took place during the development of CACM. 
Stakeholder Group Meetings















Invitation letter

Documents related to the Stakeholder meetings:
For further information on CACM, please contact Marta Mendoza Villamayor​.​