Serbia’s industrial economy entered the second half of 2026 with a renewed petroleum-cost problem. Imported coke and refined petroleum products were 23% more expensive in June than a year earlier, 31.1% above December 2025 and 9.5% higher than in May alone. No other widely used industrial input recorded a comparable combination of annual and monthly escalation.
The shock matters because petroleum products sit inside almost every physical supply chain. Road hauliers consume diesel directly, construction companies operate fuel-intensive machinery, agricultural producers depend on tractors and harvesting equipment, while mines and quarries use large fleets of heavy vehicles. Manufacturers also face higher costs for lubricants, petroleum-derived chemicals, packaging and inbound logistics.
The increase is particularly awkward for Serbian contractors. The real value of construction works fell 5.4% in 2025, with civil engineering contracting by approximately 11.5%, even as building construction expanded by 6.2%. Companies therefore entered 2026 with less operational room to absorb a new fuel-cost escalation. Serbia’s 2026 capital budget of RSD602bn, including major Expo 2027 and transport works, provides a large order pipeline, but it does not automatically protect contractor margins.
Long-duration infrastructure contracts are most exposed. Fuel assumptions embedded in bids submitted in 2024 or early 2025 may now be materially below replacement cost. Contractors operating under fixed prices must either absorb the difference, rely on contractual indexation or pursue variation and claims mechanisms. Where indexation uses a broad consumer-price benchmark instead of a targeted fuel index, compensation may lag the actual cost increase.
Agriculture faces a different transmission mechanism. Imported food-product prices were relatively contained, but diesel inflation can raise the domestic cost of cultivation, harvesting and transportation. The result may appear later in producer and retail food prices, particularly after the summer harvest.
Serbia’s petroleum exposure is also intertwined with the unresolved ownership and sanctions risk surrounding NIS, the operator of the Pančevo refinery and the country’s dominant fuel company. The 2026 budget included a potential RSD164bn envelope connected with a possible state intervention in NIS. That provision illustrates the strategic value of domestic refining capacity at a moment when imported refined products have become markedly more expensive.
For lenders and investors, the June data justify higher fuel contingencies, tighter monthly cost monitoring and project-specific stress tests. A 10–15% fuel-price sensitivity can materially change EBITDA for logistics companies and cost-to-complete calculations for civil works. The current shock is not simply an energy-market statistic; it is a working-capital and contract-management event spreading across Serbia’s physical economy.
