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Leading service provider for Transmission System Operators (TSOs) in the European electricity market.

Through our single trading platform we auction cross-border transmission capacity rights. We also provide accounting (clearing and settlement), contracting, reporting, project support and IT services.

Auctions

On behalf of TSOs, we organize long and short-term auctions of transmission capacity rights.

We offer the following products: yearly, seasonal, quarterly, monthly, weekly, daily and intraday.

Auction results Auction calendar

500+

Registered market participants
26k+

Auctions held annually
100%

Auction tool availability
80+

Employees
50

TSOs serviced

Latest market messages

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Publication Tool data for Core ID CCR IDA1 Delivery Day 07/08/2026

Published: 06/08/2026 | 15:33 by JAO
Delay in Market Coupling Results publication

Published: 06/08/2026 | 15:23 by JAO
2026 Auction Calendar update

Published: 06/08/2026 | 12:43 by JAO
Capacity Curtailment on the IT-CH border for delivery period 07-08-2026

Published: 06/08/2026 | 07:42 by JAO
Capacity Curtailment on the IT-FR border for delivery period 07-08-2026

Published: 06/08/2026 | 07:41 by JAO
Capacity Curtailment on the IT-AT border for delivery period 07-08-2026

Published: 06/08/2026 | 07:40 by JAO
Capacity Curtailment on the FR-ES border for delivery period 07-08-2026

Published: 06/08/2026 | 07:06 by JAO

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Please be informed that, due to the cancellation of IDA1 for the delivery date 07/08/2026, no IDA1 publication data will be available in the CORE ID CCR Publication Tool

The Market Coupling process is delayed due to technical reasons or market issues.

Therefore, the publication of the final Market Coupling Results is delayed.

Further information can be found in the Fallback Manual that is published on the websites of NEMO Committee and ENTSO-E.

We would like to inform you that as per TSOs request, the 2026 Auction Calendar has been updated on the corridor IF2-FR-GB, IF2-GB-FR, VKL-D1-GB, VKL-GB-D1, NLL-GB-BE and NLL-GB-BE .

For more details please refer to the Auction Calendar on our webpage http://www.jao.eu/auctions#/calendar/table to find its latest version.

1. TSO(s)*:

TERNA

2. Identification of affected Long Term Transmission Rights:

IT-CH

3. Triggering event:

Curtailment due to Curtailment to ensure operation remains within Operational Security Limits

4. Affected volume in MW / hour for each concerned period:

07-08-2026 18:00 - 19:00 720 MW

07-08-2026 19:00 - 20:00 720 MW

07-08-2026 20:00 - 21:00 720 MW

07-08-2026 21:00 - 22:00 720 MW

07-08-2026 22:00 - 23:00 720 MW

5. Amount of LTTR remaining after curtailment:

07-08-2026 18:00 - 19:00 593 MW

07-08-2026 19:00 - 20:00 0 MW

07-08-2026 20:00 - 21:00 0 MW

07-08-2026 21:00 - 22:00 0 MW

07-08-2026 22:00 - 23:00 593 MW

1. TSO(s)*:

TERNA

2. Identification of affected Long Term Transmission Rights:

IT-FR

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

4. Affected volume in MW / hour for each concerned period:

07-08-2026 18:00 - 19:00 1369 MW

07-08-2026 19:00 - 20:00 1369 MW

07-08-2026 20:00 - 21:00 1369 MW

07-08-2026 21:00 - 22:00 1369 MW

07-08-2026 22:00 - 23:00 1369 MW

5. Amount of LTTR remaining after curtailment:

07-08-2026 18:00 - 19:00 909 MW

07-08-2026 19:00 - 20:00 0 MW

07-08-2026 20:00 - 21:00 0 MW

07-08-2026 21:00 - 22:00 0 MW

07-08-2026 22:00 - 23:00 909 MW

6. Information on exact operational security limit(s) that are expected to be violated in the absence of curtailment*:

Expected violation of operational security limits of physical transmission assets

7. Why alternative measures are not sufficient to avoid the expected violation of operational security limit(s)*?
During the CC process, all the remedial actions provided by the TSOs are already considered by the CCC

1. TSO(s)*:

TERNA

2. Identification of affected Long Term Transmission Rights:

IT-AT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

4. Affected volume in MW / hour for each concerned period:

07-08-2026 19:00 - 20:00 71 MW

07-08-2026 20:00 - 21:00 71 MW

07-08-2026 21:00 - 22:00 71 MW

5. Amount of LTTR remaining after curtailment:

07-08-2026 19:00 - 20:00 1 MW

07-08-2026 20:00 - 21:00 1 MW

07-08-2026 21:00 - 22:00 1 MW

6. Information on exact operational security limit(s) that are expected to be violated in the absence of curtailment*:

Expected violation of operational security limits of physical transmission assets

7. Why alternative measures are not sufficient to avoid the expected violation of operational security limit(s)*?

During the CC process, all the remedial actions provided by the TSOs are already considered by the CCC

1. TSO(s)*:

RTE-TSO

2. Identification of affected Long Term Transmission Rights:

FR-ES

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

4. Affected volume in MW / hour for each concerned period:

07-08-2026 09:00 - 10:00 1559 MW

07-08-2026 10:00 - 11:00 1559 MW

07-08-2026 11:00 - 12:00 1559 MW

07-08-2026 12:00 - 13:00 1559 MW

07-08-2026 13:00 - 14:00 1559 MW

07-08-2026 14:00 - 15:00 1559 MW

07-08-2026 15:00 - 16:00 1559 MW

07-08-2026 16:00 - 17:00 1559 MW

07-08-2026 17:00 - 18:00 1559 MW

07-08-2026 18:00 - 19:00 1559 MW

5. Amount of LTTR remaining after curtailment:

07-08-2026 09:00 - 10:00 1467 MW

07-08-2026 10:00 - 11:00 1467 MW

07-08-2026 11:00 - 12:00 1467 MW

07-08-2026 12:00 - 13:00 1467 MW

07-08-2026 13:00 - 14:00 1467 MW

07-08-2026 14:00 - 15:00 1467 MW

07-08-2026 15:00 - 16:00 1467 MW

07-08-2026 16:00 - 17:00 1467 MW

07-08-2026 17:00 - 18:00 1467 MW

07-08-2026 18:00 - 19:00 1467 MW

6. Information on exact operational limit(s) that are expected to be violated in the absence of curtailment :

07/08/2026

09:00-10:00 cantegrit-mouguerre 1

10:00-11:00 cantegrit-mouguerre 1

11:00-12:00 cantegrit-mouguerre 1

12:00-13:00 cantegrit-mouguerre 1

13:00-14:00 cantegrit-mouguerre 1

14:00-15:00 cantegrit-mouguerre 1

15:00-16:00 cantegrit-mouguerre 1

16:00-17:00 cantegrit-mouguerre 1

17:00-18:00 cantegrit-mouguerre 1

18:00-19:00 cantegrit-mouguerre 1

7. Why alternative measures are not sufficient to avoid the expected violation of operational security limit(s) ? :

The available remedial actions were assessed as insufficient or ineffective to avoid the violation of operational security limits

Resource Center

This section contains key information for market participants such as user guides, forms, auction rules, nomination deadlines and other documents.

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Our certifications

JAO has successfully implemented internationally recognized management systems and is now officially certified for ISO/IEC 27001:2022 – the global standard for Information Security Management Systems and for ISO 9001 – the international standard for Quality Management Systems.

About us

We started as a shared auction platform for transmission capacity across Central Western Europe in 2008. Over time, we became the operator of the Single Allocation Platform and therefore the leading trading platform for European Transmission System Operators.

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We created a user guide to support the onboarding of market participants. Learn more about the steps to register, the required documents and our service desk platform.

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