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2026 Forecasting Assumptions Update Consultation

25/08/2026
Market National Electricity Market, Wholesale Electricity Market (WA)
StageFinal Report
ConvenorAEMO NEM
Initiated23/12/2025
Accepting submissions?No
Submissions close02/02/2026

Timeline

  • Publication of the Draft 2026 Forecasting Assumptions Update and call for stakeholder submissions
    23 December 2025
  • Consumer advocates verbal submission session
    2 February 2026
  • Submissions due on Draft 2026 Forecasting Assumptions Update
    2 February 2026
  • Consultation Summary Report published
    25 August 2026
  • Publication of final 2026 Forecasting Assumptions Update
    25 August 2026

Key contact

Email: [email protected]

Matter under consultation

AEMO delivers a range of forecasting and planning publications for the National Electricity Market (NEM) and Wholesale Electricity Market (WEM).

AEMO consulted on updates to assumptions to apply in the Reliability Forecast for the NEM and WEM Electricity Statements of Opportunities, providing transparency and stakeholder engagement opportunities in accordance with the Australian Energy Regulator's Forecasting Best Practice Guidelines (FBPG), to updates subsequent to the 2025 Inputs, Assumptions and Scenarios Report (IASR).

Alongside AEMO’s 2026 Forecasting Assumptions Update, CSIRO consulted on its GenCost 2025-26 report, which provides the cost of new build electricity generation in terms of capital costs and comparative costs of delivered electricity from individual technologies.

For more information on the GenCost 2025-26 report, visit www.csiro.au/gencost. 

Submissions on the Draft 2026 Forecasting Assumptions Update and Draft 2025-26 GenCost report closed on Monday, 2 February 2026. To support consumer advocate engagement, AEMO held a consumer advocates verbal submission session on 2 February 2026.

Submissions received are published below, subject to AEMO’s Consultation submission guidelines.

  • Final stage
  • Gencost Submissions
  • Forecasting Assumptions Update Submissions
  • Draft stage

Final documents

Supporting material

FRG consultation submissions

Other relevant input sources

Draft consultation documents 

Supporting materials 

National Electricity MarketConsultations
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