ISO Tariff Redesign

Important Dates

May 12, 2025 | Engagement Schedule updated

Purpose

To align the ISO tariff with changes to transmission and market policy so that clear and stable price signals provide investors with certainty and information needed for effective decision-making.

Focus: revising how transmission and ancillary services costs are recovered, how market participants can obtain system access service, and the costs to connect.

The Alberta Utilities Commission (AUC) deadline for the AESO to file the bulk and regional rate updates is January 31, 2027, with new rates expected to take effect in 2029 following the AUC review process.

Engagement Schedule (updated May 12, 2025)


Important Dates

May 12, 2025 | Engagement Schedule updated

Purpose

To align the ISO tariff with changes to transmission and market policy so that clear and stable price signals provide investors with certainty and information needed for effective decision-making.

Focus: revising how transmission and ancillary services costs are recovered, how market participants can obtain system access service, and the costs to connect.

The Alberta Utilities Commission (AUC) deadline for the AESO to file the bulk and regional rate updates is January 31, 2027, with new rates expected to take effect in 2029 following the AUC review process.

Engagement Schedule (updated May 12, 2025)


  • Stakeholder Sessions

    Kick-off Information Session | March 5, 2025

    Purpose

    This virtual session provided interested stakeholders with more information on:

    • Details about the overall ISO Tariff Redesign engagement plan;
    • Associated timelines and opportunities to participate;
    • Suggested guiding principles; and
    • A high-level overview of each workstream.

    Stakeholders had opportunities to ask questions throughout the session.

    Materials

    Available under "AESO Materials"

  • Stakeholder Updates

    Feb. 19, 2025

    We will be introducing the AESO's 2025 Engagement Plan with focus on Tariff activities and Transmission Reinforcement Payment (TRP) at the REM Design Finalization Week 1 on Feb. 25 - 28, 2025. Note that in-person participation is restricted to REM participants, however all stakeholders are able to listen in to the sessions.

    While the sessions are booked for the whole day, the virtual portion will end when the in-person breakouts begin, typically in the early afternoon.

    REM Design Finalization Week 1 Presentation

    Registration Details

    Week 1

    Session Focus

    Tuesday, February 25

    Understand Changes in Policy Landscape and Interdependencies

    Wednesday, February 26

    Discuss Approach for OTP

    Thursday, February 27

    Understand Intent and Approach for TRP

    Friday, February 28

    Explore and Evolve Congestion Management Design in REM
Page last updated: 12 May 2025, 03:28 PM