Energy margin

The energy margin is the difference between the total revenue earned from generating electricity and the total costs incurred in generating that electricity. It is not generators’ profits, as operational costs such as staffing, office overheads, maintenance and repairs are not included.

The energy margin is a measure of profitability. That is, if energy margins are particularly high (or low) for a short period, it indicates that profits could be particularly high (or low) at that time.

The energy margin data below is from July to December 2024. The Electricity Authority requested the data for this period under the Electricity Industry Act, following the significant spike in wholesale electricity prices in July and August 2024.

The total energy margin across all gentailers varied from $60 to $95 million per week from July to December 2024, with an average energy margin of $76 million.

This data has been analysed and published as part of our review of winter 2024.

About gentailer energy margins in 2024

Click on the company name to see individual margin data.

• This data does not include operational costs such as staffing, maintenance, debt servicing and levies.
• Spot electricity costs are costs from physical and financial contracts associated with wholesale spot electricity prices.
• The Electricity Authority takes no responsibility for the completeness, accuracy, or reliability of this data.
• This data has not been assured or audited by the gentailers’ auditors.
• It is not intended to replace the information in the gentailers’ financial statements and periodic operating reports.