Guidelines, schemes, models and reviews

On 12 November 2024, the AER published a final determination on the 2024 cost threshold review for regulatory investment tests and annual price reports.

On 21 November 2024, we completed a review of the Cost Benefit Analysis guidelines and Regulatory Investment Test application guidelines and instruments.

The intent of the annual updates is to provide stakeholders with information on rate of return data changes since the publication of the most recent Instrument.

On 6 October 2023, the AER published final amendments to the Cost Benefit Analysis guidelines and the Regulatory Investment Test (RIT) application guidelines.

The Rate of Return Instrument (the Instrument) sets out the approach by which we will estimate the rate of return, and comprises the return on debt and the return on equity, as well as the value of imputation credits. We publish a new Instrument every 4 years that will bind all regulatory determinations in the subsequent 4 years.

This is the fifth topic in a series of working papers that we will produce as part of our pathway to the 2022 Rate of Return instrument. The outcomes from these working papers will feed in to the active phase of our 2022 Rate of Return instrument review.

The Australian Energy Regulator (AER) has developed guidelines to make the integrated system plan (ISP) actionable