Electricity exported from Serbia under the EU Carbon Border Adjustment Mechanism carries an indicative default cost of €78.37/MWh. The figure is calculated using a national emission factor of 1.041 tonnes of CO₂ per MWh and a second-quarter CBAM certificate price of €75.28 per tonne. The default charge applies when actual emissions treatment is not used through the required evidence chain.
The indicative default level is higher than most price gaps between Serbia and nearby EU markets. Hungary’s average second-quarter electricity price was about €13/MWh above Serbia’s, which limits the scope for conventional export arbitrage to offset the CBAM default cost. The exposure does not automatically apply in cases where an authorised EU CBAM declarant can use verified emissions from a specific generating installation.
For Serbian wind, solar and hydro producers, qualifying for actual-emissions treatment requires documentation beyond a standard renewable electricity transaction. The European Commission’s August guidance sets out conditions for how physical contracting and verification must be structured for the declarant to claim eligible emissions. Under the guidance, the evidence requirements are designed to link each exported volume to a named installation.
August guidance on contracting, nominations and verification
The August guidance requires a physical power purchase agreement between the named producer and the authorised declarant. Where a trader is involved, the contractual setup must show a single tripartite arrangement rather than a sequence of back-to-back contracts. Production also needs to be matched with firmly nominated interconnector capacity within the same period.
The period covered by nominations cannot exceed one hour. Nominations must cover Serbia, the EU destination and every transit country, while smart-meter records must confirm that the plant produced the corresponding volume during that hour. An accredited verifier then receives monthly evidence reports and issues a conclusion covering both the installation and the electricity allocated to each EU declarant.
The verified report must identify the declarant by its EORI number and state the eligible quantity imported from the installation. This approach constrains how value can be maintained when electricity is sold through conventional portfolio supply arrangements. Once renewable output is mixed with other sources without controlled allocation, parties may not be able to connect each exported megawatt-hour to a named installation.
Northbound flows: Serbia exports to Hungary
Despite the default-cost disadvantage, scheduled exports from Serbia to Hungary increased by 111% year on year in the second quarter of 2026. The rise forms part of broader northbound flow patterns affecting regional trade routes. Romanian exports to Hungary increased by 156% over the same period.
Ukrainian demand is described as supporting Hungary’s role as a regional hub while increasing Serbia’s importance as both a generation and transit market. The reported movement does not necessarily indicate that CBAM-related costs have become commercially manageable for all transactions. Some trades may instead reflect transit arrangements, existing contractual positions, security-of-supply needs or expectations of retroactive changes to EU electricity rules.
Serbia’s situation is described as complex because commercial schedules do not always match physical electricity flows. Power entering from the southern Balkans can physically pass through Serbia towards Hungary even when individual commercial transactions describe different origins for accounting purposes. For CBAM purposes, however, an authorised declarant still needs a controlled commercial and documentary chain.
Risks for multi-border portfolios and evidence control
Under CBAM rules, electricity cannot qualify for low actual-emissions values simply because renewable power is present somewhere in the interconnected system. This creates risks for traders operating multi-border portfolios where volumes are aggregated across routes and counterparties. Contracts need to specify who controls interconnector nominations and who provides hourly evidence.
The contractual structure also needs to define which EU declarant receives each volume and who bears responsibility if an accredited verifier rejects an actual-emissions claim. Without those allocations, parties may not be able to maintain eligibility under the verification conclusion requirements tied to each declarant’s EORI number and eligible quantity imported.
Potential EU reforms and Guarantees of Origin
A pending EU reform could change how national electricity defaults are calculated by using the entire generation mix rather than focusing primarily on fossil production. Such an approach could allow hydropower, wind and solar output to reduce Serbia’s national factor used in default calculations. Under the current approach described in the source, Serbia’s lignite fleet dominates the default calculation even when exported electricity is associated commercially with a renewable installation.
The reform could also remove a requirement to prove an absence of physical network congestion at the time of export. That condition is described as difficult for Serbian generators because they do not control congestion across multiple transmission systems. If adopted without substantial changes, revised provisions could apply retroactively from January 1, 2026.
The European Commission has also proposed mutual recognition of Guarantees of Origin between the EU and qualifying Energy Community countries. Serbia already has an operational GoO registry, and recognition could allow Serbian renewable generators access to a wider EU certificate market while improving corporate-PPA economics and creating an additional revenue stream.
A GoO alone is not proof of CBAM-compliant physical delivery because it confirms renewable origin for disclosure purposes rather than linking CBAM actuals to producer contracting, hourly generation, cross-border nominations, importer details and verification conclusions. The strongest export product described in the source combines physical electricity delivery with a recognised GoO and a controlled CBAM evidence pack.
Serbian renewable generators could also sell verified electricity domestically to steel, aluminium, fertiliser and other manufacturers exporting goods to the EU. This route may avoid some complications associated with treating electricity itself as an imported CBAM good while supporting industrial customers in documenting production emissions for EU buyers.
That domestic route still requires proper metering and allocation because certificate-only supply contracts may support a renewable claim without automatically meeting product-level CBAM evidence requirements or emissions verification needs. Undifferentiated Serbian electricity remains exposed to a default charge that can overwhelm export margins under CBAM defaults.
Elevated by CBAM.Clarion.Engineer