COP31 opened in Antalya this week with expectations low and a familiar argument about money. That diplomatic theatre matters less to New Zealand business than what has happened in our own carbon market over the past 12 months. The cost allocation the conference keeps circling has already landed here, and the result has been more policy fog, not less.
The conference has already lowered the bar
The backdrop is grim. October 2026 was the warmest on record, and UNEP says emissions must fall 18% by 2030 against 2025 levels, while current national plans deliver just 5-8%. Fossil fuel phase-out is not formally on the agenda. New Zealand collected a Fossil of the Day award on opening day, its fifth in six years, partly over a complaint tied to the EU free trade agreement.
Australia’s Chris Bowen, COP31 President of Negotiations, framed the core problem as finance, telling delegates that too many countries “can’t access the finance at the speed, scale and terms required” to deliver their plans. In other words, the era of pledges is giving way to the era of invoices.
Wellington has seen its invoice and declined it
New Zealand got its bill in June. Treasury put the cost of closing the country’s 84 million-tonne Paris gap through offshore mitigation at $4.4 to $5 billion. Prime Minister Christopher Luxon’s response was blunt: “we ain’t shutting down farms and we certainly aren’t sending billions of dollars offshore.”
There is a defensible fiscal case against wiring $5 billion overseas for credits of variable quality. But the liability did not appear from nowhere. Treasury’s 2023 climate fiscal assessment flagged the offshore mitigation risk years ago, and successive governments let it grow. Walking away from a target is a choice with consequences, and one of them is trade. In 2025, University of Waikato’s Nathan Cooper warned that loosening targets risked undermining the EU FTA’s requirement for mutually supportive trade and climate policy. Exporters selling into Europe should treat that as a live risk, not an academic one.
The ETS took the hit first
The domestic damage started in November 2025, when Simon Watts, climate change minister at the time, announced the ETS would be uncoupled from international pledges. The carbon price fell from about $50 to as low as $33 almost overnight. The Conversation, writing in 2025, recorded an 18% drop by the end of that day and called it a soft renege.
It got worse. A subsequent quarterly auction failed to sell a single unit, and the government considered cancelling auctions outright while officials warned more surprises would deepen buyer uncertainty. Ministers eventually left volumes largely unchanged to 2030. For foresters, emitters and anyone holding NZUs on the balance sheet, that is a year of mark-to-market pain caused by the rule-maker, not the market.
The shortage nobody is pricing
Here is the part business should watch. In April 2026, the Climate Change Commission described the market as being in a fragile state with low and volatile prices. It found the unit surplus shrinking faster than expected, warned of a possible shortfall as early as 2028, and projected that industrial free allocation will hit the overall cap by 2035, leaving nothing to auction.
That is a classic setup for a price spike after a price crash. Firms that read today’s soft NZU price as the new normal could be badly caught out when supply tightens.
The Commission’s July monitoring report adds pressure. The second emissions budget can still be met, but by a thin 3.6 MtCO2e margin, with more than half the planned reductions at significant risk. The 2030 methane target is projected to be missed, and the Commission warns that without action in the next one to two years, both that target and the third budget become no longer feasible, with delay raising costs for households and the economy.
Less disclosure, more scrutiny
Meanwhile, the compliance burden moved the other way. In 2025 the External Reporting Board lifted the mandatory climate disclosure threshold for listed issuers from $60 million to $1 billion. That is welcome relief for mid-sized listed companies drowning in reporting costs. But it lands just as international buyers and trade partners are paying closer attention to New Zealand’s credibility, so many exporters will find their customers asking the questions regulators no longer do.
What firms should plan for
Nothing decisive will come out of Antalya for New Zealand business. The decisions that matter are domestic, and they are coming fast. A tightening cap, a shrinking surplus and a government that has said no to offshore spending point to one outcome: the cost of emissions shifts back onto the domestic market from 2028. The smart move is to stop budgeting on a $33-ish carbon price, stress-test exposure to a shortage-driven rebound, and press Wellington for stable settings that survive the next election. Business can live with a high carbon price. What it cannot plan around is another year of rules rewritten overnight.
Sources
- ODT: Expectations low for climate conference (2026-11-13)
- RNZ: COP31 opens in Türkiye as global temp flirts with 1.5°C line (2026-11-10)
- Newsroom: New Zealand handed a $5b bill for climate inaction (2026-06-14)
- University of Waikato: COP30 – NZ’s lack of climate ambition undermines global goals and free-trade agreements (2025-11-03)
- RNZ: Government considered cancelling carbon auctions after policy changes tanked prices (2026-08-20)
- The Conversation: COP30 – climate law changes mean NZ could retreat from its international obligations (2025-11-10)
- Climate Change Commission: Advice on NZ ETS unit limits and price control settings for 2027-2031 (2026-04)
- Climate Change Commission: Monitoring report – Emissions reduction 2026 (2026-07)
- Climate Change Commission: Monitoring report – Emissions reduction 2026 executive summary (2026)
- External Reporting Board: Aotearoa New Zealand Climate Standard 2 (NZ CS 2) (2025-11-13)
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