The AER released the 2025 annual benchmarking reports for distribution and transmission on 27 November 2025.
Annual Benchmarking Reports
AER - 2025 Annual Benchmarking Report - Electricity distribution network service providers - November 2025
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AER - 2025 Annual Benchmarking Report - Electricity transmission network service providers - November 2025
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Consultant reports
The AER’s 2025 annual benchmarking reports are supported by two expert reports and two memoranda from Quantonomics.
Quantonomics - Benchmarking results for the AER - distribution - November 2025
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Quantonomics - Benchmarking results for the AER - transmission - November 2025
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Quantonomics - Memorandum - Output Index Weights - 17 June 2025
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Quantonomics - Memorandum - Output Index Weights - Supplementary Analysis -11 November 2025
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Supporting information
The underlying data and calculations used in the benchmarking reports and memoranda are available.
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Submissions
Under the National Electricity Rules, the AER must consult with network service providers in the development of performance reports and we may also consult with other stakeholders who we consider have an interest in the relevant performance report.
We received the following submissions from electricity network service providers and other industry stakeholders in the development of the 2025 annual benchmarking reports.
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