How Oil and Fuel Prices Are Reshaping Transportation Routes in Europe (2026)

Fuel has always been the largest variable cost in road freight. Every experienced dispatcher knows that a €0.20 swing in diesel changes the math on a load. What is happening in 2026 is not a €0.20 swing — it is something significantly larger, driven by geopolitical disruption that is reshaping how freight moves across the continent in real time.

This article looks at what is driving the current fuel shock, how it is splitting Europe into high-cost and low-cost zones, what that means for routing decisions, and what freight forwarders and carriers can do to protect their margins.

What Is Driving Fuel Prices in 2026

The current fuel shock has a single primary cause: the Iran war and the resulting disruption to the Strait of Hormuz — the narrow waterway through which approximately 20% of the world's traded oil passes.

Attacks on Gulf Cooperation Council crude oil and gas installations and Iranian military assets on Kharg Island have pushed Brent crude above USD 110 per barrel as of early April 2026, with some analysts warning of USD 150 territory if the conflict continues. Unlike the 2022 shock driven by the war in Ukraine — which could partly be offset through rerouting and supply diversification — the Hormuz disruption centres on a physical chokepoint that cannot be substituted.

The consequences for European road freight are direct and severe:

• The average weighted diesel price across the EU-27 stood at €2.12 per litre as of 26 March 2026, a 29% increase since the beginning of the war.
• Fuel accounts for up to 30–40% of a carrier's operating costs. When prices increase by €0.20–€0.30 per litre, the impact is immediate.
• The current oil price volatility would add an average of €890 to monthly fuel costs for European diesel trucks.

A secondary concern is AdBlue — the urea-based diesel exhaust fluid required by Euro 6 trucks. AdBlue is made from natural gas, and Polish media is reporting AdBlue supply disruption warnings that recall the 2022 crisis, when prices surged from €0.35 to over €2.00 per litre and threatened the operating capacity of the Euro 6 truck fleet across Central Europe. With over 90% of the EU truck fleet running on diesel, and AdBlue now a required additive for most of that fleet, a supply disruption compounds the fuel cost shock significantly.

Europe Is No Longer One Fuel Market

Perhaps the most operationally significant development of 2026 is that Europe has fractured into a patchwork of national fuel markets, each responding differently to the same oil price shock. The result is a near-€1 per litre gap between the cheapest and most expensive countries — a difference that materially changes the economics of specific routes.

The Cheapest Countries (Capped or Subsidised)

Several Eastern and Central European governments have intervened directly to cap retail diesel prices:

• Slovenia fixed the maximum diesel price at €1.528 per litre from 10 March, cutting excise duty to make it possible.
• Hungary capped diesel at 615 forints per litre (approximately €1.55/litre), applying the cap to hauliers and businesses as well as private drivers.
• Croatia introduced a retail cap of €1.55 per litre.
• Poland capped diesel at approximately PLN 6.20 per litre (approximately €1.44), protecting Polish hauliers from the full market price.
• Czechia has similarly seen lower market prices due to a combination of tax policy and government measures.

The Most Expensive Countries (Market Prices)

At the other end, Western European markets are bearing the full brunt of the oil price spike:

• As of March 30, 2026, the EU average diesel price was €2.000 per litre, with the Netherlands the most expensive country in Europe.
• Germany has seen diesel climb toward levels last seen during the 2022 energy crisis, exceeding €2 per litre.
• Ireland reached €2.452 per litre — among the highest in Europe.
• France topped €2 per litre, with one in five French petrol stations hit by fuel shortages.

The Routing Implication

For a truck taking 600 to 800 litres, the saving from filling in Slovenia versus Italy comes to roughly €240 to €400 per stop — on a single refuelling. For a carrier running regular Italy–Austria–Germany lanes, this is no longer a minor optimisation. It is a structural competitive advantage or disadvantage depending on whether the routing allows access to cheaper fuel markets.

Hauliers moving along the Italy–Slovenia–Croatia–Austria routes can use Slovenia as a logistics “oasis” — getting regulated diesel at prices much lower than in nearby high-cost markets. This now includes not just Italian trucks but Austrian and Croatian vehicles as well, since Slovenia sits on major international freight corridors.

The Poland–Germany corridor shows the same dynamic in reverse. Polish diesel is currently capped at approximately PLN 6.20 per litre (approximately €1.44), while German diesel is running at €1.72 to €1.80 per litre at commercial filling stations. This €0.28 to €0.36 per litre price differential means that trucks running Germany-to-Poland routes and filling in Poland are operating at materially lower fuel cost than trucks running Poland-to-Germany routes and filling in Germany.

How Fuel Price Divergence Changes Route Economics

When fuel prices were relatively uniform across Europe — as they largely were in 2023 and 2024 — routing decisions were primarily driven by distance, tolls, and transit times. In 2026, fuel price geography has become a primary routing variable in its own right.

The Fuelling Stop as a Strategic Decision

Experienced drivers have always known to fill up in certain countries. What has changed is the scale of the price differential and its operational significance. A truck running from Vilnius to Milan can now plan its fuelling stops to include a full tank in Poland or Slovenia, avoiding the highest-priced markets entirely. On a return leg, the same logic applies in reverse.

For fleet operators, this means:

• Route planning should now integrate live fuel price data by country, not just distance and tolls
• Fuelling stops should be planned in advance rather than left to the driver's discretion
• The cheapest route by distance is not always the cheapest route by total cost

Carrier Selectivity Is Increasing

When fuel costs rise quickly, smaller carriers start limiting activity or rejecting underpriced loads. For forwarders, this leads to reduced availability, higher rates, and more uncertainty.

Carriers are becoming selective about which routes they will accept at existing rates. Lanes that cross multiple high-price fuel markets — Ireland, Netherlands, Germany — are seeing more refusals at fixed contract rates, pushing traffic toward the spot market where current costs can be reflected immediately.

Many carriers are still operating on payment terms of 45 to 90 days, meaning they are financing fuel upfront. When costs rise quickly, the cash flow pressure is immediate. This is particularly acute for small and medium-sized carriers running on thin margins — the backbone of European road freight capacity.

The Germany Problem

Germany presents a specific challenge. The German BAG diesel price index, which updates weekly and directly controls the fuel surcharge percentage on all German road freight invoices, has been printing at 25 to 29 percent of base transport rates in the first weeks of Q2 2026 — a range that is 4 to 6 percentage points above the Q4 2025 average.

For any shipper routing goods through Germany — one of Europe's most critical freight corridors — this surcharge is unavoidable. It layers on top of German toll costs, which at approximately €0.40–0.50 per km for HGVs are already among the highest in Europe.

Tolls Add Another Layer of Complexity

Fuel costs are not the only thing that changed in 2026. Several major European countries have simultaneously increased or restructured their toll systems, compounding the cost pressure on specific routes.

Poland raised e-TOLL rates by 40–42% for vehicles over 3.5 tonnes from February 2026, with the tolled network expanding to approximately 5,869 km.

Austria sits at €0.53/km — the highest motorway toll rate in Europe and more than five times the rate in Poland at €0.093/km. For carriers running North–South traffic through the Alps via the Brenner, Pyhrn, or Tauern routes, even small per-km increases translate into significant annual costs.

From 1 July 2026, Romania will move away from the vignette system for vehicles over 3.5 tonnes and introduce the TollRo electronic toll, based on a pay-as-you-go principle covering motorways, expressways, and European routes.

The combined effect of fuel price divergence and toll increases means that route optimisation in 2026 requires simultaneous consideration of at least three cost variables — fuel price by country, toll cost by route, and transit time — rather than the simpler distance-based calculation that worked in previous years.

What Freight Forwarders and Carriers Should Do Now

1. Revise fuel surcharge clauses immediately

Fixed-rate contracts signed in 2024 or early 2025 do not reflect current diesel costs. Freight rates are generally not indexed to fuel price movements, making it challenging for operators to pass current diesel price increases on to shippers. Even in countries with official indices, such as France and Spain, the update frequency is too low to keep pace with these increases. If your contracts do not have a fuel surcharge indexation mechanism, renegotiate now — or accept that your sub-carriers will become unreliable as they absorb losses they cannot sustain.

2. Plan fuelling stops as carefully as loading stops

The €400 saving per refuelling stop in Slovenia versus Italy is not trivial. For carriers running regular lanes through Southern or Central Europe, building fuel-stop planning into dispatch instructions — rather than leaving it to the driver — can save thousands of euros per truck per month at current price levels.

3. Build carrier relationships in low-cost fuel zones

Polish, Lithuanian, Czech, and Slovenian carriers are currently operating with a structural fuel cost advantage over their German, French, and Dutch counterparts on the same lanes. For freight forwarders, deepening relationships with carriers based in or routing through low-cost fuel markets provides rate stability that Western European carriers cannot currently match.

4. Monitor AdBlue supply

AdBlue supply disruption is a low-probability, high-impact risk. A repeat of the 2022 shortage would ground Euro 6 trucks across the continent regardless of fuel availability. Check that your key sub-carriers have AdBlue supply secured and monitor Polish logistics media for early warning signals — Polish hauliers tend to be the first to flag Central European supply issues.

5. Recalculate load efficiency — every load matters more now

At €2.00+ per litre diesel, the cost of moving an underloaded trailer has increased proportionally. A trailer running at 60% utilisation that cost €800 in fuel to operate in 2024 now costs over €1,000 for the same run. The business case for proper load planning — maximising LDM utilisation, minimising empty kilometres, optimising multi-stop loads — has strengthened significantly in 2026.

6. Watch the Strait of Hormuz

Key variables to monitor for the road transport sector are: whether Pakistan-mediated talks produce any tangible progress; whether tanker traffic through the Strait of Hormuz continues to climb or reverses; and whether EU gas stockpile withdrawals accelerate, which could sharpen the AdBlue and industrial demand risks into the next quarter.

Fuel prices could stabilise quickly if the geopolitical situation improves — or escalate further if it worsens. Operating under long-term fixed-rate contracts in either direction carries significant risk right now.

The Longer-Term Shift: Electric Trucks

The current crisis is accelerating a conversation that was already underway. European diesel hauliers face a monthly fuel cost increase 1.5 times higher than electric trucks, which now deliver an extra €280 in monthly savings per vehicle. In Germany, the monthly fuel cost increase for diesel trucks is over 2.5 times that of electric trucks.

Electric trucks are not yet a practical option for most long-haul European routes — range, charging infrastructure, and acquisition cost remain barriers. But for urban delivery, short-haul, and regional distribution, the economics are shifting noticeably. Fleets that began electrification programmes in 2023 and 2024 are now operating with a meaningful cost advantage over diesel-dependent competitors.

Summary

The 2026 fuel shock is not a temporary inconvenience — it is a structural cost event driven by a physical supply constraint that cannot be quickly resolved. For European road freight, the practical implications are:

• A near-€1/litre gap between the cheapest and most expensive EU countries creates genuine routing arbitrage opportunities
• Carriers in Eastern and Central Europe have a structural cost advantage on shared lanes
• Fuel surcharge contracts need urgent review
• Load efficiency directly affects how much the fuel cost shock hurts — every empty kilometre is more expensive than it was six months ago
• AdBlue supply is a risk that deserves more attention than it typically receives

The freight forwarders who will protect their margins through this period are not those who negotiate the hardest with carriers on fixed rates. They are those who optimise every load, plan fuelling strategically, and build carrier relationships in the right geographies.