Serbia’s electricity exporters face a potential carbon cost approaching €86 per megawatt-hour under the European Union’s Carbon Border Adjustment Mechanism (CBAM). The change affects how export competitiveness is assessed as carbon classification, contractual delivery arrangements and independently verified emissions become additional commercial factors alongside wholesale prices, cross-border transmission capacity and generation costs.
CBAM default factor and indicative carbon liability for Serbian power
Serbia’s national CBAM electricity default factor is 1.041 tonnes of CO₂ per MWh, reflecting a carbon-intensive thermal generation system. Using the EU’s third-quarter 2026 CBAM certificate price of €82.32/tCO₂, the calculation yields an indicative gross carbon liability of €85.70/MWh for electricity imported into the EU using the Serbian default factor.
The figure reflects exposure based on the third-quarter certificate price rather than a charge for October deliveries, which will use the fourth-quarter price. The liability may also be reduced by eligible carbon costs already paid in the country of origin.
Imported electricity does not receive a free-allocation adjustment under CBAM, unlike sectors such as steel and aluminium. That difference makes electricity’s carbon exposure particularly significant during the initial implementation period.
Impact on Serbia–Hungary trading between SEEPEX and HUPX
The immediate commercial effects are visible in trading between Serbia’s SEEPEX exchange and Hungary’s HUPX market. For October 9 delivery, SEEPEX day-ahead prices rose to €239.96/MWh, while Hungary’s HUPX day-ahead prices were €269.43/MWh.
The resulting €29.47/MWh price difference was substantially below the indicative Serbian CBAM charge. Under national default emissions, a conventional export from Serbia to Hungary would therefore struggle to generate a positive trading margin at those average prices even before considering transmission capacity, balancing and transaction costs.
Hourly price differences, contractual positions and verified actual emissions can lead to different outcomes. However, regional market documentation indicates that higher Hungarian wholesale prices do not automatically translate into profitable export opportunities for Serbian electricity under CBAM.
Regional trading patterns and implications for EPS and renewables
The Energy Community Secretariat has documented changes in regional trading patterns after CBAM’s introduction. Commercial electricity exchanges between Western Balkan markets and neighbouring EU countries declined in early 2026, with hydrological conditions, generation availability and changing demand also affecting flows.
Serbia remains an important northern corridor as scheduled exports towards Hungary increased during the second quarter. The change indicates that cross-border trading continues but that CBAM alters the economics and potential destinations of electricity flows.
For Elektroprivreda Srbije (EPS), reliance on lignite-fired generation exposes electricity sold under the national default methodology to high carbon costs. The shift increases the importance of domestic sales, generation flexibility and low-carbon investment alongside individual export transactions.
For independent producers, CBAM creates additional requirements for claiming actual emissions treatment for low-operational-emissions generation such as wind or solar. A renewable installation’s EU customer cannot automatically claim those emissions based solely on the electricity originating from a renewable source.
Actual emissions treatment requires a qualifying physical power purchase agreement involving the EU declarant and producer, evidence of a compliant transmission route, cross-border capacity nominations aligned with generation within hourly intervals, and independent verification. The generating installation must also meet the applicable emissions threshold.
Guarantees of Origin alone are insufficient to establish eligibility for actual-emissions treatment under these conditions. As a result, two Serbian renewable projects with similar technology, generation costs and expected output could receive substantially different export values depending on whether their contractual and metering arrangements support CBAM-compliant deliveries.
Financing risks for renewables and sector-specific considerations
The financing impact extends to banks funding wind, solar and battery storage projects in Serbia. Traditional project-finance assessments focus on construction costs, production forecasts, wholesale power prices, balancing exposure and buyer creditworthiness, while CBAM adds risks tied to verified emissions, contractual eligibility, export-market access and the durability of projected cross-border revenues.
Banks are expected to evaluate renewable projects using separate revenue scenarios: domestic market sales, conventional EU exports using applicable defaults, and qualifying exports supported by verified actual emissions. Existing loans may also require reassessment when debt-service projections depend on electricity premiums available in Hungary or other EU markets.
For Serbia’s steel, aluminium, cement and fertiliser manufacturers, electricity adds another layer of exposure through direct production-cost increases from expensive power. CBAM does not currently treat purchased-electricity emissions identically across industrial sectors: indirect electricity emissions are included in cement and fertiliser calculations, while current iron, steel and aluminium obligations generally focus on direct embedded emissions.
The European Commission is considering amendments to electricity CBAM methodology that could improve recognition of lower-carbon generation. Investment decisions cannot assume those changes will be adopted in their proposed form.
Linking generation data with verifiable cross-border deliveries
The emerging challenge for Serbia is connecting electricity generation details, trading infrastructure and verifiable carbon data into a commercially credible export product. Producers’ ability to capture European market premiums depends on demonstrating which power plant produced the electricity, when it was generated, how it crossed the border and which EU importer is entitled to claim its emissions.
Without that evidence, competitively priced Serbian renewable electricity risks being valued at the EU border as if it carried the carbon intensity of the wider national power system.