New ACER guidance helps market participants comply with revised REMIT data reporting rules
New ACER guidance helps market participants comply with revised REMIT data reporting rules
What is it about?
Today, ACER publishes the first set of its revised REMIT data reporting documents, providing policy and technical instructions on how to report wholesale energy market data to ACER.
REMIT is the EU-wide framework that detects and deters market manipulation and abuse in wholesale energy markets, enhancing transparency and trust in the integrity of Europe’s energy markets.
What’s changing?
Following the revision of REMIT (2024) and of its secondary legislation (2026), new data reporting requirements will be introduced in three phases between October 2027 and July 2028. To help market participants and other reporting parties meet their new obligations, ACER is updating its guidance in three sets, one per phase.
This first set covers exposure and continuous reporting, LNG market data and bilateral transactions with energy intensive consumers. The corresponding first-phase requirements will apply from 29 October 2027. Until then, reporting continues as under the current framework and existing guidance.
What’s in this first set of guidance?
Transaction Reporting User Manual (TRUM), providing updated technical instructions on how to report wholesale energy products under REMIT.
Q&As on transaction reporting (formerly FAQs), answering stakeholders’ most relevant questions.
Guideline on transaction reporting, bringing together existing policy guidance and clarifying who must report, what and when, including an annex on derivatives reporting. The document is published alongside the evaluation reports of the recent public consultations on the guideline and its annex.
New Guidance on exposure reporting with practical examples to clarify reporting requirements and their application for this new data.
Updated and new electronic formats for collecting transaction data.
Together, these documents give reporting parties a clear, practical basis to prepare for the new requirements and report consistently across the EU. They were developed in consultation with stakeholders, national regulatory authorities (NRAs) and the European Commission.
What’s next?
23 November 2026: ACER webinar on the first set of guidance (Register for free).
27 November 2026: Publication of the new guidance for reporting parties under REMIT Delegated Regulation.
Early 2027: Revision of the ACER Guidance and Q&As on REMIT to align them with the recast Implementing Regulation on data reporting.
Ahead of each next phase (May and November 2027): Public webinar after each set of revised guidance.
Any questions?
ACER is collecting questions ahead of its webinar (23 November). Submit your questions by Monday 16 November 2026.
For technical queries or specific reporting situations, contact us at REMIT Query Form, as these will not be covered during the webinar.