Serbia has introduced detailed reporting and documentation requirements for its new greenhouse-gas emissions tax regime, creating a closer connection between industrial carbon liabilities, investment decisions and corporate accounting systems.
- New reporting obligations connect tax and emissions data
- Investment tax credits create incentives for emission reductions
- Companies must maintain project-level evidence
- Carbon tax introduced alongside EU carbon border pressures
- Electricity producers face strongest impact
- Carbon records become part of industrial competitiveness
The rulebook, published in the Official Gazette on 17 July 2026, provides the operational framework for the Law on Greenhouse Gas Emissions Tax, which entered into force on 1 January 2026. The system introduces a charge of €4 per tonne of taxable carbon-dioxide equivalent covering carbon dioxide, nitrous oxide and perfluorocarbons emitted by designated industrial and electricity facilities.
The framework primarily affects operators required to hold greenhouse-gas emissions permits, including companies in electricity generation, cement production, aluminium manufacturing, fertiliser and nitrogen-compound production, as well as crude iron, steel and ferroalloy industries. Preparatory estimates indicated that around 50 companies operating 92 installations could fall under the regime, together accounting for more than half of Serbia’s greenhouse-gas emissions.
New reporting obligations connect tax and emissions data
Although the carbon price remains below levels faced by many European producers, the new system changes how companies manage emissions information. Carbon calculations, engineering investments and tax reporting must now be coordinated at installation and project level. The first complete tax return covering 2026 emissions must be submitted by 31 May 2027, together with payment of the calculated liability. Companies must nevertheless collect supporting evidence throughout 2026, including invoices, contracts, payment records, technical documentation and investment classifications.
The taxable amount is not based on total emissions alone. Companies first deduct a prescribed reference quantity representing emissions associated with efficient production using recognised technology. The difference between actual emissions and reference emissions becomes the taxable base, expressed in tonnes of carbon-dioxide equivalent. The taxable amount cannot be negative, meaning installations operating below the reference level would have no emissions-tax liability.
A facility producing 250,000 taxable tonnes above its reference level would face a gross annual liability of €1 million, while a taxable base of one million tonnes would result in a €4 million obligation. The dinar value is calculated using the National Bank of Serbia’s middle exchange rate on the final day of the tax period. The calculation makes technical data central to tax exposure. Facilities with similar output levels may face different liabilities depending on fuel mix, production efficiency, utilisation rates and applicable benchmarks.
Companies will therefore need reliable production data, emissions monitoring systems and clear calculations of reference emissions. Disputes over installation boundaries, fuel consumption, production volumes or process emissions could affect the tax base before the carbon price is applied. The required tax filing, known as Form PP EGESB, includes taxpayer information, filing status, authorised representatives, liability classification and detailed tax calculations. Emissions quantities must be reported in tonnes of carbon-dioxide equivalent to two decimal places, while financial amounts are recorded in dinars without decimals except for the tax rate.
A separate attachment will consolidate emissions from all installations operated by the same taxpayer, including total emissions, reference emissions and the resulting taxable amount. Companies operating multiple facilities will therefore need central control over environmental and financial records.
Investment tax credits create incentives for emission reductions
The most significant financial mechanism under the framework is a tax credit available to qualifying electricity producers. A taxpayer that generated at least 80 per cent of its previous-year revenue from electricity production may claim a credit equal to 20 per cent of eligible investment in approved measures that reduce greenhouse-gas emissions.
The credit cannot offset the entire tax liability. It is limited to 80 per cent of the assessed emissions tax, meaning companies must pay at least 20 per cent of their calculated obligation. For example, a power producer with a €1 million carbon-tax liability could reduce the payment by a maximum of €800,000. Since the credit equals 20 per cent of eligible investment, the company would need at least €4 million of qualifying expenditure to achieve the maximum reduction. A producer facing a €4 million tax bill could receive up to €3.2 million in credits, requiring €16 million of eligible investment while leaving at least €800,000 payable.
The credit applies directly against the emissions-tax obligation rather than reducing taxable profit. Its value depends on the taxpayer’s liability and compliance with documentation requirements. Eligible expenditure may include project documentation, technical services, equipment and construction works directly connected with approved emissions-reduction measures. Recoverable VAT is excluded where the company has the right to deduct input VAT.
The requirement that costs be “directly connected” creates an important allocation issue for major engineering projects. Large EPC contracts may include emissions-reduction measures alongside ordinary maintenance, civil works, grid upgrades, safety systems or equipment replacement. Only costs demonstrably linked to reducing emissions should qualify for the credit, requiring companies to separate eligible and non-eligible expenditure.
Companies must maintain project-level evidence
The regulation requires taxpayers claiming credits to maintain a separate record for each emissions-reduction project. Records must include project identification, investment type, implementation period, financial documents, suppliers, amounts excluding VAT, payment dates and payment methods. Supplier records must contain the company name and Serbian tax-identification number. Reported investment values must reconcile with underlying invoices and financial documents.
Where several qualifying projects are completed during one tax period, each project must have its own documentation file. Records may be maintained electronically or on paper but must remain available until the statutory limitation period for assessment and collection expires. Accounting records alone will not be sufficient. Companies will need contracts, technical specifications, approved designs, acceptance certificates, commissioning documentation, asset registers and evidence connecting investments to emissions reductions at the relevant installation.
For electricity producers, supporting evidence may include changes in fuel consumption, heat rates, auxiliary consumption, operating hours or carbon intensity per megawatt-hour. Incomplete documentation could result in the loss of expected tax benefits, creating additional tax liabilities, interest and possible penalties. The new system effectively requires coordination between engineering departments, environmental specialists, procurement teams, accounting functions and tax advisers. Project codes in enterprise resource planning systems should align with tax-credit schedules, while contracts and payment records should clearly identify qualifying measures.
Carbon tax introduced alongside EU carbon border pressures
Serbia introduced the domestic emissions tax together with a separate levy on imported carbon-intensive goods covering selected iron, steel, cement, fertiliser and aluminium products. Both measures use the same headline rate of €4 per tonne of carbon-dioxide equivalent. Imports below five tonnes annually of covered products are excluded from the import levy.
The framework is linked to the European Union’s Carbon Border Adjustment Mechanism (CBAM), which entered its financial phase in 2026. Serbian exporters of electricity, steel, cement, aluminium and fertilisers may face additional carbon costs when selling into EU markets. Serbia’s domestic carbon price remains significantly below the carbon costs reflected in the EU Emissions Trading System. The domestic tax therefore cannot fully offset CBAM exposure for carbon-intensive exporters.
The distinction between gross tax liability and the amount remaining after tax credits is important because EU CBAM calculations consider carbon costs actually paid after applicable reductions and compensation mechanisms. A company reducing its Serbian carbon-tax payment through investment credits may have a lower recognised carbon cost available for EU border calculations. The tax credit nevertheless creates a domestic incentive by allowing companies to direct capital towards emissions-reduction assets rather than paying the full amount as a fiscal charge.
Electricity producers face strongest impact
The focus on electricity producers reflects Serbia’s reliance on carbon-intensive generation. Elektroprivreda Srbije (EPS) operates the country’s lignite-based electricity fleet and is expected to face significant exposure under the new system.
The tax-credit mechanism could support EPS investments in renewable generation, efficiency improvements, modernisation and other qualifying measures. The utility is already developing a 1.2 GWp solar portfolio with 200 MW/400 MWh of battery storage in cooperation with Hyundai Engineering and UGT Renewables, while preparing additional hydropower and grid-related investments. Strategic importance alone does not guarantee eligibility. Each expenditure item must meet the prescribed criteria and demonstrate a direct connection with emissions reduction.
The credit may improve project economics but does not function as unrestricted grant income. Its value is limited by the company’s tax liability and the 80 per cent credit ceiling. For lenders financing decarbonisation projects, the credit must be assessed carefully. Banks will need confirmation that investments qualify, that borrowers have sufficient tax exposure to use the credit and that the timing of credit recognition matches financing structures.
Carbon records become part of industrial competitiveness
The new framework turns emissions information into financial documentation. Engineering teams must define technical changes, environmental departments must measure emissions effects, procurement units must preserve contracts and invoices, and finance teams must connect the records to the PP EGESB filing. The system also aligns with documentation requirements faced by Serbian exporters under CBAM. Production data, fuel consumption, electricity sourcing, installation boundaries and embedded emissions must remain consistent across domestic tax filings, environmental reporting and EU declarations.
Differences between information submitted to Serbian authorities and EU customers could create tax, contractual and reputational risks. Industrial companies will increasingly need integrated emissions-data systems rather than separate records prepared independently for environmental permits, tax reporting, CBAM obligations and financial reporting. The immediate effect of the rulebook is administrative, but its broader impact concerns investment decisions. Projects with clear emissions baselines, measurable reductions and complete documentation can generate fiscal value through tax credits, while poorly defined projects may lose eligibility despite delivering physical improvements.
Serbia’s €4-per-tonne carbon price remains an initial carbon-cost mechanism rather than a full European carbon-market equivalent. The new rulebook gives it a stronger corporate role by linking emissions liabilities with documented decarbonisation investments and requiring companies to manage environmental and financial data through a single auditable process.
