BELGRADE, 6 November — Serbian electricity traders face narrower margins on exports to Hungary as existing EU carbon rules create an indicative €85.70/MWh exposure for power assessed using Serbia’s default emissions factor. The European Commission has clarified how customs treatment applies to electricity imports moved through explicitly allocated transmission capacity.
The guidance covers nominated electricity volumes and distinguishes imports from transit. It does not introduce a new carbon tariff or change Serbia’s 1.041 tCO2/MWh default factor; the pressure on margins comes from existing CBAM rules interacting with trading conditions.
Carbon costs and trading margins
Applying the cited third-quarter 2026 certificate price of €82.32 per tonne of CO2 to Serbia’s default factor gives the indicative, unadjusted carbon amount for electricity assessed on that basis. That amount can outweigh a wholesale price spread that would otherwise make a sale from Serbia into the EU worthwhile.
The final CBAM amount can vary with the applicable methodology and adjustments. A transaction eligible for verified actual emissions may produce a different result, while renewable imports that meet the strict conditions may allow the buyer to avoid relying on Serbia’s national default.
Serbia’s scheduled electricity exports to Hungary fell 21.6% year on year in the Energy Community’s third-quarter monitoring. The decline cannot be attributed to CBAM alone: generation, demand, interconnector availability and trading prices also affect cross-border flows.
Evidence shapes cross-border deals
Electricity generated in Serbia does not acquire a different country of origin because an intermediary trades it through another market. Where power is sold through multiple companies or crosses more than one border, origin and transit treatment must be supported by relevant commercial and transmission evidence.
For a Serbian trading desk, the net-margin calculation therefore depends on more than the purchase price. The route to the EU buyer, nomination rights, customs responsibility and emissions treatment can all affect the economics of a transaction.
If verified actual-emissions conditions are not met, renewable generation somewhere in a trader’s portfolio is not enough to support a plant-specific claim. Serbian generators and traders have an incentive to distinguish installation-linked transactions, which may support a more defensible emissions claim, from general portfolio sales that may remain exposed to default-based calculations.
This may separate electricity available for export from supply backed by the contractual and operational evidence required by an EU importer. Wholesale spreads will remain important, but the evidence and compliance costs can determine which deals remain viable. The immediate priority identified for Serbia’s power sector is to price the complete export transaction, rather than calculate CBAM only after electricity crosses the border.
