The European Commission’s definitive Carbon Border Adjustment Mechanism (CBAM) methodology for fertilisers uses a functional unit tied to the kilograms of nitrogen contained in the goods. Under this approach, fertiliser buyers are expected to move beyond conventional euro-per-tonne comparisons when assessing costs across suppliers.
Nitrogen content and production-process rules under CBAM
The Commission’s latest Q&A reiterates that fertiliser production processes can aggregate certain Combined Nomenclature (CN) codes where products use the same precursors or differ only in concentration. It also sets out prescribed production-process rules for ammonia, urea, ammonium nitrate and other fertiliser groups.
For blended liquid fertilisers, the methodology may require weighted-average emissions calculations. As a result, two fertilisers with similar prices per tonne can show different carbon-cost profiles once nitrogen content and embedded emissions are evaluated against the applicable CBAM functional unit.
Procurement teams are therefore directed toward considering the carbon cost per usable unit of nutrient rather than relying only on the physical tonne price. This shift is tied to how embedded emissions translate into the CBAM cost basis for covered goods.
Natural gas continues to shape ammonia and nitrogen emissions
The nitrogen-focused comparison takes place in a market where feedstock costs vary between regions. Natural gas remains the dominant cost driver for conventional ammonia and nitrogen fertilisers, affecting production costs and emissions across plants.
Differences in gas efficiency, feedstock sources and production technologies contribute to variation in both emissions and manufacturing costs. CBAM adds an additional dimension by linking import costs to the embedded emissions of covered goods.
Default values and the role of verified emissions data
The Commission’s default-value system applies a relatively low 1% mark-up for fertilisers compared with higher mark-ups for other CBAM goods. Even so, verified actual-emissions data can remain commercially valuable when a producer’s emissions are materially below the applicable default value.
For EU farmers and fertiliser distributors, CBAM does not replace existing commodity-market drivers. Natural gas prices, seasonal demand, freight costs, sanctions and trade policy can continue to dominate short-term price movements alongside the mechanism’s additional carbon-related factor.
Data requirements for Southeast European producers
In Southeast Europe, fertiliser producers and traders face an opportunity to convert plant efficiency into a verifiable carbon advantage at the nutrient level. Doing so depends on data systems that allocate emissions across prescribed production processes.
The resulting values must be expressed using the functional unit required by CBAM. Reliable reporting can then support comparisons between products with different nitrogen concentrations and emissions profiles.
The benchmark extends beyond the cheapest tonne of fertiliser as buyers must also consider the cost of its nitrogen content after accounting for the applicable carbon adjustment.