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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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SDAC_JAO_01: SDAC market coupling 13/02 - Session complete

Published: 13/02/2026 | 13:25 by JAO
UMM_01a: Delay in final Market Coupling Results publication

Published: 13/02/2026 | 13:15 by JAO
(SDAC_ExC_02): Delay in Market Coupling Results publication

Published: 13/02/2026 | 12:59 by JAO
2026 Auction Calendar update

Published: 12/02/2026 | 16:31 by JAO
SOLVED - Domain JAO.EU not available

Published: 12/02/2026 | 15:29 by JAO
JAO Inside Information Platform Currently Unreachable

Published: 12/02/2026 | 15:02 by JAO
Domain JAO.EU not available

Published: 12/02/2026 | 14:17 by JAO

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Dear Market Participants,

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

Best regards,
Operations Team

Dear Market Participants,

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

Therefore, the publication of the final Market Coupling Results is delayed. We advise you to update your shadow bids at JAO eCAT platform before 14:10 CET/CEST.

Best regards,
Operations Team

Please be aware that the publication of the 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.

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

Best regards,
Operations Team

We would like to inform you that as per TSOs request, the 2026 Auction Calendar has been updated on the corridor EL1.

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

Please be informed that all issues related to the jao.eu domain have now been successfully resolved. All associated applications and platforms are fully accessible.

Should you experience any further difficulties, please do not hesitate to contact us.

Please note that, due to a technical issue affecting the jao.eu domain, the JAO Inside Information Platform is currently not reachable. We are working to resolve the issue as a matter of priority and will inform you as soon as access has been restored.

Please be informed that we are currently experiencing an issue with our domain jao.eu. As a result, access to all applications, email and websites associated with jao.eu is temporarily unavailable. We are working to resolve the issue as quickly as possible. Once the situation has been fully restored, we will inform you accordingly. Should you have any questions in the meantime, please do not hesitate to contact us at our operation number +352 27 62 38 38

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.

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.

Go to registration