The United Kingdom will introduce a new carbon-based charge on certain imports starting 1 January 2027, and while the direct impact on New Zealand's biggest export sectors looks limited for now, exporters in a handful of industries will need to start paying close attention.
The mechanism, known as the UK Carbon Border Adjustment Mechanism (CBAM), has now had its full design finalised by the UK Government, according to the latest market intelligence report from New Zealand's Ministry of Foreign Affairs and Trade (MFAT).
What CBAM Actually Does
At its core, CBAM is designed to stop what's known as "carbon leakage," a scenario where carbon-intensive production simply shifts overseas to countries with weaker carbon pricing, rather than genuinely reducing global emissions.
To prevent that, the UK wants imported goods in certain sectors to face a carbon price roughly comparable to what UK-based manufacturers already pay under the UK's Emissions Trading Scheme.
Which Sectors Are Covered, and What New Zealand Actually Sells There
The scheme applies to five specific sectors initially, and MFAT's report includes the actual export figures for each:
| Sector | NZ Exports to UK (Year to March 2026) |
|---|---|
| Aluminium | $7.64 million |
| Iron and steel | Approximately $15.16 million |
| Cement | $47,432 |
| Fertiliser | No exports recorded |
| Hydrogen | No exports recorded |
Importantly, the scheme only applies to specific designated commodity codes within these sectors, not every product those industries make. Glass and ceramics, which had been considered during earlier consultation, will not be included in this initial phase.
The Good News for New Zealand's Biggest Export Sectors
Here's the headline that matters most for most Kiwi exporters: agricultural and food products are entirely outside the scope of CBAM's initial phase.
That means New Zealand's largest and most valuable exports to the UK, dairy, meat, wine, horticulture and seafood, will not be directly affected when the scheme comes into force.
How the Charge Will Actually Work
CBAM will operate as a tax-based system administered by HM Revenue and Customs. UK importers will be liable for a charge reflecting the gap between the carbon price UK producers pay and any carbon price already paid in the exporting country.
Importantly, the UK has confirmed it will factor in recognised overseas carbon pricing systems, including emissions trading schemes and carbon taxes, when calculating what's owed. This is intended to avoid double-charging exporters who already pay a carbon price at home.
A small business exemption has also been built in. Businesses importing less than 50,000 pounds worth of covered goods over a 12-month period will not need to register or comply with the scheme at all.
Key Dates to Know
| Date | What Happens |
|---|---|
| 1 January 2027 | CBAM officially comes into effect |
| Throughout 2027 | First reporting and accounting period covers the full calendar year |
| 31 May 2028 | Deadline for paying any 2027 CBAM liability |
| From 2028 onwards | Reporting shifts to a quarterly cycle |
| Before end of 2026 | UK to publish default emissions values for goods lacking verified data |
Why Emissions Data Will Matter More Over Time
One detail worth flagging for any New Zealand business in the affected sectors: where accurate emissions data is not provided, the UK will apply default emissions values instead. Crucially, these defaults are being designed so that relying on them offers no advantage over reporting genuine, verified emissions figures.
In practice, this means exporters with robust, verifiable emissions reporting may be better placed to manage their potential CBAM costs than those who do not, giving businesses a growing incentive to get their emissions data in order well before the scheme kicks in.
Whether NZ ETS Costs Will Count
For New Zealand industrial exporters specifically in aluminium or iron and steel, there is a genuinely open question still to be resolved: how much recognition the UK will give to carbon costs already paid under the New Zealand Emissions Trading Scheme.
MFAT's report notes this will depend on the UK's final implementation rules, evidential requirements and calculation methods, details that are still being worked out through secondary legislation and guidance ahead of the 2027 start date.
The Bigger Picture
While CBAM's initial reach into New Zealand's export economy is modest, its introduction reflects a broader shift in how major trading partners are beginning to treat the carbon intensity of traded goods. The UK Government has indicated the scheme could expand to cover additional sectors in future, based on ongoing reviews of its effectiveness.
For now, MFAT is advising exporters in the affected sectors to keep monitoring implementation details as they are released and start preparing to provide accurate, verifiable emissions data to UK importers well ahead of the January 2027 start date.
This article is based on a report published by the New Zealand Ministry of Foreign Affairs and Trade. Reproduced with attribution to the Ministry.
