Final determination

On 27 April 2021 the AER released its Final Determination on the Default Market Offer (DMO) prices for 2021-22.

The Residential Usage Profiles spreadsheet is provided for retailers. It contains daily usage information set out in 30-minute intervals, for the purposes of calculating annual prices for residential Time of Use (TOU) customers. It contains the same information as Appendix E of our Final Determination.

The Final Determination was updated in May 2021 to correct an error in the TOU bands in Appendix E for SA Power Networks controlled load.

Consultant reports

ACIL Allen Consulting has supported us in the design of a forecasting approach for wholesale and environmental costs. A report, Default Market Offer: Estimating wholesale and environmental costs for 2021-22, by ACIL Allen Consulting was published alongside the Final Determination on 27 April 2021.

We have published a spreadsheet of ACIL Allen’s modelling data for the cost of energy for interested stakeholders to understand its forecasts. The information contained in the modelling data is also set out in the ACIL Allen report for our Final Determination.


The Price index and cost assessment model (the model) calculates the wholesale electricity, network and environment regulation costs faced by retailers for 2021-22 for each area and customer type. We have provided the model for stakeholders interested in understanding how we have applied these inputs to calculate the DMO price. The information contained in the model is also set out in the DMO 2021-22 Final Determination.