Collecting energy margin information
Consultation
The Electricity Authority is consulting on a proposal to collect and publish information on generators’ energy margins. We want to regularly collect financial information from large generators to calculate energy margins to provide insights into generator profitability in various market conditions. The data will help us to monitor competition in the wholesale electricity market, particularly during periods of scarcity.
Make a submission
Our preference is to receive submissions in the format shown in Appendix B. Please email your feedback to monitoring@ea.govt.nz with “Energy margins consultation” in the subject line by 5pm Monday 8 December 2025
If you cannot send your submission electronically, please contact the Authority at monitoring@ea.govt.nz or call 04 460 8860 to discuss alternative arrangements.
We will publish all submissions. If you consider we should not publish any part of your submission, please:
- indicate which part should not be published and explain why, and
- provide a version of your submission the Authority can publish (if we agree not to publish your full submission).
All submissions, including any parts the Authority does not publish, can be requested under the Official Information Act 1982.