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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

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 EL1-FR<>GB and .

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

Capacity Curtailment on the ES-FR border for delivery period 09-07-2026

by JAO

1. TSO(s)*:

RTE-TSO

2. Identification of affected Long Term Transmission Rights:

ES-FR

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

09-07-2026 15:00 - 16:00 750 MW

09-07-2026 16:00 - 17:00 750 MW

09-07-2026 17:00 - 18:00 750 MW

5. Amount of LTTR remaining after curtailment:

09-07-2026 15:00 - 16:00 384 MW

09-07-2026 16:00 - 17:00 384 MW

09-07-2026 17:00 - 18:00 384 MW

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

   09/07/2026

      15:00-16:00 Network Security

      16:00-17:00 Network Security

      17:00-18:00 Network Security

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

Registration Now Open for the Long-Term auctions on the North Sea Link Interconnector

by JAO

Dear Market Participants,

We would like to inform you that in anticipation of the upcoming go-live of the North Sea Link Interconnector on JAO’s platform and after the closure of the relevant public consultations, the following provisional document has been published on our website:

Please note that this document is published on behalf of National Grid NSL Ltd (“NGNSL”) and is subject to approval by the competent National Regulatory Authority (“Ofgem”). The rules will be binding once Ofgem has approved them.

The first monthly auctions for the October 2026 delivery period are planned to go live on 17 September 2026, with quarterly and yearly auctions to follow later in 2026.

Registration for participation in these auctions is now open.

Action required:

  • Existing Market Participants: If you are already registered with JAO, please be informed that the updated Amendment no. 28 to the Participation Agreement is available on our website. To receive the entitlements for the North Sea Link Interconnector, please accept the NSL Long Term Allocation Rules in Amendment no. 28.
     
  • New Market Participants: For new registrations, please accept the NSL Long Term Allocation Rules during your registration via JAO Support Hub to receive the entitlements for the North Sea Link Interconnector.

For both new registrations and amendments to your Participation Agreement, please visit JAO Support Hub (support.jao.eu).

Capacity Curtailment on the ES-FR border for delivery period 07-07-2026

by JAO

1. TSO(s)*:

RTE-TSO

2. Identification of affected Long Term Transmission Rights:

ES-FR

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

07-07-2026 15:00 - 16:00 750 MW

07-07-2026 16:00 - 17:00 750 MW

07-07-2026 17:00 - 18:00 750 MW

5. Amount of LTTR remaining after curtailment:

07-07-2026 15:00 - 16:00 384 MW

07-07-2026 16:00 - 17:00 384 MW

07-07-2026 17:00 - 18:00 384 MW

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

   07/07/2026

      15:00-16:00 Network Security

      16:00-17:00 Network Security

      17:00-18:00 Network Security

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

Capacity Curtailment on the GR-IT border for delivery period 05-07-2026

by JAO

1. TSO(s)*:

TERNA

2. Identification of affected Long Term Transmission Rights:

GR-IT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

05-07-2026 08:00 - 09:00 250 MW

05-07-2026 09:00 - 10:00 250 MW

05-07-2026 10:00 - 11:00 250 MW

05-07-2026 11:00 - 12:00 250 MW

05-07-2026 12:00 - 13:00 250 MW

05-07-2026 13:00 - 14:00 250 MW

05-07-2026 14:00 - 15:00 250 MW

05-07-2026 15:00 - 16:00 250 MW

05-07-2026 16:00 - 17:00 250 MW

5. Amount of LTTR remaining after curtailment:

05-07-2026 08:00 - 09:00 0 MW

05-07-2026 09:00 - 10:00 0 MW

05-07-2026 10:00 - 11:00 0 MW

05-07-2026 11:00 - 12:00 0 MW

05-07-2026 12:00 - 13:00 0 MW

05-07-2026 13:00 - 14:00 0 MW

05-07-2026 14:00 - 15:00 0 MW

05-07-2026 15:00 - 16:00 0 MW

05-07-2026 16:00 - 17:00 0 MW

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

HVDC cable ARACTHOS – GALATINA

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

 

Capacity Curtailment on the ME-IT border for delivery period 05-07-2026

by JAO

1. TSO(s)*:

CGES

2. Identification of affected Long Term Transmission Rights:

ME-IT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

05-07-2026 08:00 - 09:00 400 MW

05-07-2026 09:00 - 10:00 400 MW

05-07-2026 10:00 - 11:00 400 MW

05-07-2026 11:00 - 12:00 400 MW

05-07-2026 12:00 - 13:00 400 MW

05-07-2026 13:00 - 14:00 400 MW

05-07-2026 14:00 - 15:00 400 MW

05-07-2026 15:00 - 16:00 400 MW

05-07-2026 16:00 - 17:00 400 MW

5. Amount of LTTR remaining after curtailment:

05-07-2026 08:00 - 09:00 0 MW

05-07-2026 09:00 - 10:00 0 MW

05-07-2026 10:00 - 11:00 0 MW

05-07-2026 11:00 - 12:00 0 MW

05-07-2026 12:00 - 13:00 0 MW

05-07-2026 13:00 - 14:00 0 MW

05-07-2026 14:00 - 15:00 0 MW

05-07-2026 15:00 - 16:00 0 MW

05-07-2026 16:00 - 17:00 0 MW

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

HVDC Monita

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

Ukrainian Intraday auctions visible in eCAT

by JAO

As part of the ongoing technical preparation, Ukrainian intraday auctions (UA-SK and UA-HU) are already visible in eCAT. Please note that until the commercial go-live, no capacity will be offered through these auctions.

We kindly ask you to disregard these auctions until further notice.

We will share additional information regarding the commercial go-live and the availability of these products soon.

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.

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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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