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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
OPS
  • 500+
    Registered market participants
  • 26k+
    Auctions held annually
  • 100%
    Auction tool availability
  • 80+
    Employees
  • 50
    TSOs serviced

Latest market messages

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Capacity Curtailment on the IT-CH border for delivery period 21-01-2026

by JAO

1. TSO(s)*:

TERNA

2. Identification of affected Long Term Transmission Rights:

IT-CH

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

21-01-2026 06:00 - 07:00 927 MW

21-01-2026 07:00 - 08:00 927 MW

21-01-2026 08:00 - 09:00 927 MW

21-01-2026 09:00 - 10:00 927 MW

21-01-2026 10:00 - 11:00 927 MW

5. Amount of LTTR remaining after curtailment:

21-01-2026 06:00 - 07:00 797 MW

21-01-2026 07:00 - 08:00 196 MW

21-01-2026 08:00 - 09:00 196 MW

21-01-2026 09:00 - 10:00 196 MW

21-01-2026 10:00 - 11:00 812 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

*According to section 57.3 of the EU HAR, this field can be filled in within 24 hours after the initial publication

Capacity Curtailment on the IT-FR border for delivery period 21-01-2026

by JAO

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:

21-01-2026 05:00 - 06:00 1495 MW

21-01-2026 06:00 - 07:00 1495 MW

21-01-2026 07:00 - 08:00 1495 MW

21-01-2026 08:00 - 09:00 1495 MW

21-01-2026 09:00 - 10:00 1495 MW

21-01-2026 10:00 - 11:00 1495 MW

21-01-2026 11:00 - 12:00 1495 MW

5. Amount of LTTR remaining after curtailment:

21-01-2026 05:00 - 06:00 1422 MW

21-01-2026 06:00 - 07:00 804 MW

21-01-2026 07:00 - 08:00 176 MW

21-01-2026 08:00 - 09:00 176 MW

21-01-2026 09:00 - 10:00 176 MW

21-01-2026 10:00 - 11:00 788 MW

21-01-2026 11:00 - 12:00 1400 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

*According to section 57.3 of the EU HAR, this field can be filled in within 24 hours after the initial publication

Capacity Curtailment on the IT-SI border for delivery period 21-01-2026

by JAO

1. TSO(s)*:

TERNA

2. Identification of affected Long Term Transmission Rights:

IT-SI

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

21-01-2026 06:00 - 07:00 334 MW

21-01-2026 07:00 - 08:00 334 MW

21-01-2026 08:00 - 09:00 334 MW

21-01-2026 09:00 - 10:00 334 MW

21-01-2026 10:00 - 11:00 334 MW

5. Amount of LTTR remaining after curtailment:

21-01-2026 06:00 - 07:00 274 MW

21-01-2026 07:00 - 08:00 63 MW

21-01-2026 08:00 - 09:00 63 MW

21-01-2026 09:00 - 10:00 63 MW

21-01-2026 10:00 - 11:00 288 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

*According to section 57.3 of the EU HAR, this field can be filled in within 24 hours after the initial publication

Capacity Curtailment on the IT-AT border for delivery period 21-01-2026

by JAO

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:

21-01-2026 06:00 - 07:00 81 MW

21-01-2026 07:00 - 08:00 81 MW

21-01-2026 08:00 - 09:00 81 MW

21-01-2026 09:00 - 10:00 81 MW

21-01-2026 10:00 - 11:00 81 MW

5. Amount of LTTR remaining after curtailment:

21-01-2026 06:00 - 07:00 62 MW

21-01-2026 07:00 - 08:00 8 MW

21-01-2026 08:00 - 09:00 8 MW

21-01-2026 09:00 - 10:00 8 MW

21-01-2026 10:00 - 11:00 49 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

*According to section 57.3 of the EU HAR, this field can be filled in within 24 hours after the initial publication

2026 Auction Calendar update

by JAO

We would like to inform you that as per TSOs request, the 2026 Auction Calendar has been updated on the corridor RO-HU and HU-RO.

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

Urgent Market Update: auction cancellation and 2nd round created for RO-HU-M-BASE-------260201-01 & HU-RO-M-BASE-------260201-01

by JAO

Please note that the following auctions have been cancelled


HU-RO-M-BASE-------260201-01

RO-HU-M-BASE-------260201-01
 

A 2nd round of the long term auction for the corridor RO-HU and HU-RO with auction ID 

 RO-HU-M-BASE-------260201-02 and

RO-HU-M-BASE-------260201-02  

with the following timings :

 

Open both directions :  20/01 at15:00

Close both directions : 22/01 at 15:00

Dispute deadline :26/01 at 15:25

Dispute deadline  : 28/01 at 15:25

Please note that the Default Bids will not be taken into consideration, thank your understanding.

Kind regards,

JAO Operations

Capacity Curtailment on the IT-CH border for delivery period 20-01-2026

by JAO

1. TSO(s)*:

TERNA

2. Identification of affected Long Term Transmission Rights:

IT-CH

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

20-01-2026 06:00 - 07:00 927 MW

20-01-2026 07:00 - 08:00 927 MW

20-01-2026 08:00 - 09:00 927 MW

20-01-2026 09:00 - 10:00 927 MW

20-01-2026 10:00 - 11:00 927 MW

20-01-2026 14:00 - 15:00 927 MW

20-01-2026 15:00 - 16:00 927 MW

20-01-2026 16:00 - 17:00 927 MW

20-01-2026 17:00 - 18:00 927 MW

20-01-2026 18:00 - 19:00 927 MW

20-01-2026 19:00 - 20:00 927 MW

20-01-2026 20:00 - 21:00 927 MW

5. Amount of LTTR remaining after curtailment:

20-01-2026 06:00 - 07:00 797 MW

20-01-2026 07:00 - 08:00 196 MW

20-01-2026 08:00 - 09:00 196 MW

20-01-2026 09:00 - 10:00 196 MW

20-01-2026 10:00 - 11:00 812 MW

20-01-2026 14:00 - 15:00 812 MW

20-01-2026 15:00 - 16:00 196 MW

20-01-2026 16:00 - 17:00 196 MW

20-01-2026 17:00 - 18:00 196 MW

20-01-2026 18:00 - 19:00 196 MW

20-01-2026 19:00 - 20:00 196 MW

20-01-2026 20:00 - 21:00 818 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

Resource Center

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

Go to resources

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. 

ISO
IT

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.

Get to know us

Register your company

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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Frequently asked questions

Check out the common questions and our answers on how to use the auction platform.

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If you can't find an answer to your question, our team is here to help!

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