Review of rate of return guideline

Date initiated: 
31 July 2017
Effective date: 
17 December 2018
General inquiries - Rate of return
AER reference: 


Our rate of return guideline 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.

Estimation of the rate of return is complex and contentious, and the rate of return is a significant driver of regulated revenue. 

We initiated a review of the rate of return guideline on 31 July 2017 by publishing our consultation paper on the process for reviewing the rate of return guideline. Interested parties were invited to make submissions on our consultation paper. Submissions closed on 28 August 2017.

Register your interest

Interested stakeholders can register their interest and be kept informed of developments in this area by sending us an email at