Fuel has always mattered in road transport, but what has changed is the speed and unpredictability of the latest move. In March 2026,
IRU said attacks on critical energy infrastructure had pushed global oil and fuel prices sharply higher, with the weighted average EU-27 diesel price reaching €2.12 per litre on 26 March 2026, up 29%. The
European Commission’s Weekly Oil Bulletin also shows how closely the market is now being watched week by week, which tells you something on its own: this is no longer a background cost issue. It is back at the front of operational decision-making.
What makes this especially difficult for carriers is that the real problem is not only high fuel, but fuel volatility. Carriers can plan around a known cost base. What is much harder to manage is a market where fuel moves quickly while customer pricing, surcharge logic, and internal planning rules stay frozen. That gap is where the pain starts. A lane priced a few weeks ago can suddenly stop behaving like the same lane. The load may still be moving, the truck may still be full, but the economics underneath it have changed.
This is also why carriers feel the shock before customers do. Fuel is bought now. The extra cash leaves the business immediately. Customer rates, on the other hand, often move later, especially on contract work, fixed-price agreements, or accounts where surcharge reviews happen monthly instead of weekly. The Q4 2025
European Road Freight Rate Benchmark already showed a market where contract and spot pricing were not moving in the same way, which matters here: when cost changes hit faster than commercial updates, the carrier becomes the buffer. That is manageable for a short time. It becomes dangerous when volatility stays elevated.
That lag creates an immediate cash-flow problem, not just a margin problem.
Fuel is one of the biggest cost lines in road transport, and it represents about
one third of operating costs for road freight operators. At the same time, many operators are working on margins of around 2% to 3%. That leaves almost no room to absorb a sudden spike, especially when other costs are already under pressure.