NFU calls for carbon emissions tax to be postponed amid Iran war cost pressures

17 April 2026 3 minute read
Tractor spreading nitrogen onto wheat

Photograph: Gary Naylor 

Government plans to introduce a carbon border adjustment mechanism in January 2027 risk impacting farmers' ability to produce food at an already highly-pressured time, the NFU has said.

The CBAM (carbon border adjustment mechanism) is, in essence, a tax on the carbon emissions produced during the manufacture of certain imported goods.

It aims to ensure that domestic carbon reduction policies do not result in the export of carbon-intensive industries to countries with less stringent emissions legislation, a phenomenon known as ‘carbon leakage’. 

Materials currently expected to fall under the scope of the CBAM when imported to the UK include aluminium, cement, hydrogen, steel products, and – crucially for agriculture – fertiliser.

The NFU has previously expressed concerns that the CBAM will push up the cost of fertiliser for farmers, particularly for the arable sector. 

Without that pause, CBAM risks having a material impact on growers’ and farmers’ ability to produce food at a time when we must grow domestic food production.”

NFU Deputy President Paul Tompkins

“British farmers largely rely on fertiliser to grow and produce our food, yet we no longer make it here. Adding a CBAM to this essential input as it arrives at our ports would pile even more costs onto farms already under intense pressure,” said NFU Deputy President Paul Tompkins.

“I worry that if government fails to apply the same charges to imported food, we’ll simply be penalising British farmers while giving overseas producers a free pass.”

Lower fertiliser costs in non-CBAM countries give overseas producers a built in price advantage, making it easier for imports to undercut UK farmers. That imbalance risks shifting production abroad and driving carbon leakage, ultimately weakening the competitiveness of UK agriculture.

Postpone the CBAM

The war in the Middle East and subsequent blockade of the Strait of Hormuz has seen disruption to supplies of oil and gas. One fifth of global ammonia and urea supplies and 20% of the world’s oil and gas shipments pass through this channel.

Natural gas is used in the production of nitrogen fertilisers, accounting for between 60-80% of the input costs associated with its production.

“Every extra cost on fertiliser runs the risk of feeding through the food chain, increasing the cost of producing food and adding to inflation for consumers,” Paul continued. 

“Natural gas remains the dominant input cost in nitrogen fertiliser production and disruption linked to the Iran conflict is already driving up costs for UK farmers. Many are facing rising fuel and fertiliser bills with little certainty.

“We believe the best option would be to postpone CBAM and conduct a market review in 12 months. Without that pause, CBAM risks having a material impact on growers’ and farmers’ ability to produce food at a time when we must grow domestic food production.”


Ask us a question about this page

Once you have submitted your query someone from NFU CallFirst will contact you. If needed, your query will then be passed to the appropriate NFU policy team.

You have 0 characters remaining.

By completing the form with your details on this page, you are agreeing to have this information sent to the NFU for the purposes of contacting you regarding your enquiry. Please take time to read the NFU’s Privacy Notice if you require further information.