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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.

 

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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

2027 Auction Calendar

by JAO

Dear Market Participants,

We are happy to share with you the final version of the 2027 Auction Calendar for Yearly, Seasonal, Quarterly and Monthly Auctions.

For more details, please find 2027 Auction Calendar attached here and, on our webpage, (http://www.jao.eu/auctions#/calendar/table ) in the bottom right corner under “Legacy Version XLS”

Best regards,

JAO Operations Team

Update: Default Bid Issue

by JAO

Please note that the issue affecting the default bids has been identified as impacting the IFA and EL1 borders only.

For participants active on these borders, we recommend reviewing the content of their default bids.

Regular bidding can be used during the bidding gate to overwrite the existing default bid.

Our teams continue to investigate the issue and work on a permanent fix.

We will inform Market Participants as soon as the correction has been deployed.

Thank you for your cooperation and understanding.

Kind regards,

JAO Operations

Delay in the publication of Publication Tool data 07/11

by JAO

Please be informed that there is a delay in the publication of data on PUTO for BD 07/11

The relevant data will be published as soon as possible.

We apologies for any inconvenience this may cause and appreciate your understanding

SDAC_JAO_01: SDAC market coupling - Session complete

by JAO

Please be informed that the day-ahead market coupling session is now completed.

[SDAC_ExC_02a]: Delay in Preliminary Market Coupling Results publication

by JAO

Please be aware that the publication of the preliminary SDAC Market Coupling Results is delayed until further notice.

The Market Coupling Results will be published as soon as they are available.

If needed, another delay message will be sent out.

Further information can be found in the Fallback Manual that is published on the websites:

NEMO Committee

ENTSO-E



Therefore, if relevant, we advise you to update your shadow bids at JAO eCAT platform before 14:10.

Registration for UA<>HU Intraday test session | 24-25 November 2026

by JAO

Dear Colleagues,

We are pleased to invite you to register for our upcoming UA<>HU Intraday test session, scheduled to take place on 24-25 November 2026. To register, please reply to this email or send an email to helpdesk@jao.eu with the following information:

Company name

EIC code of your company

Username of Trader

Email Address of Trader

Further information, such as scenario, timings, environment and test certificate will be provided in a follow-up communication closer to test date.

Should you have any questions or feedback, please feel free to reach out.

Kind regards, 

JAO Operations Team

Delay in the publication of Publication Tool data 06/11

by JAO

Please be informed that there is a delay in the publication of data on PUTO for BD 06/11

The relevant data will be published as soon as possible.

We apologies for any inconvenience this may cause and appreciate your understanding

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. 

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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
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JAO workers

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!