New Zealand cuts ETS unit supply from 45 million to 21 million

New Zealand will cut emission units auctioned under its Emissions Trading Scheme from 45 million to 21 million across 2025 to 2029 to counter oversupply that depressed carbon prices and caused failed auctions. The tightening illustrates how supply controls underpin a credible carbon price, a design lesson relevant as India develops its Carbon Credit Trading Scheme.

New Zealand will reduce the number of emission units issued under its Emissions Trading Scheme between 2025 and 2029, cutting supply from 45 million to 21 million units, each representing one metric tonne of carbon dioxide equivalent. An oversupply held by participants had depressed carbon prices and contributed to failed auctions, jeopardising climate targets. The government will keep the auction floor price, the cost containment reserve price, and reserve volumes unchanged, with the changes beginning at the first auction in 2025.

Businesses and individuals participating in New Zealand's ETS are directly affected, as the reduced unit supply is expected to raise the carbon price and increase compliance costs for emitters. Climate Change Minister Simon Watts said the oversupply had depreciated carbon prices and caused recent auctions to fail. Sectors covered by the scheme face stronger price signals to cut emissions, though government modelling predicts minimal impact on the average New Zealander despite potentially higher costs.

ETS participants should prepare for a higher carbon price and factor tighter unit availability into emissions and budgeting decisions ahead of the first auction in 2025. Watts said the existing floor price, cost containment reserve, and reserve volumes are working and will be left alone, so participants should monitor auction outcomes under the new supply settings. Policymakers and emitters in India tracking carbon-market design should watch how supply reduction restores price credibility and auction clearing.

Key figure — ETS unit supply cut: from 45 million to 21 million (2025-2029)