Annual Benchmarking Report 2018

Effective date: 
30 November 2018


In the annual benchmarking reports we (the AER) examine the relative efficiency of the distribution and transmission electricity network service providers. In doing this we consider the characteristics of each network business, and how their productivity compares at the aggregate level and for the outputs they deliver to consumers. We developed the report using publically available data that we collected after an extensive consultation process that aligned with the development of our Expenditure Forecast Assessment Guideline.

Enquiries about these reports should be directed to the AER at, or call on 1300 585 165.


On 11 October 2019 we published a data-only update to the 2018 annual benchmarking results for distribution service providers. This update reflects corrections to operating expenditure data for the 2017 year (AusNet Services, CitiPower, Powercor and United Energy) and the 2016 year (AusNet Services only).


Please note: due to the identification of an error during the preparation of the 2020 Annual Benchmarking Report, the productivity index number results in annual benchmarking reports preceding the 2020 Report are not accurate. This error does not impact the econometric opex cost function models or the partial performance indicators. Please see the 2020 Annual Benchmarking Report for corrected results and for more information on the error which relates to the non-reliability output weights.