Implications of the Iran War on the Bio-Bunkering Market

The bio-bunkering market is entering a new phase: one shaped not just by decarbonization targets and fuel innovation, but by geopolitical disruption.

The ongoing Iran war is rapidly reshaping global marine fuel dynamics, exposing structural vulnerabilities in fuel supply chains and accelerating shifts in how and where ships bunker fuel. For biofuels, the implications are significant.

ResourceWise’s latest Bio-Bunkering At a Glance: March 2026 report offers a detailed view into how these dynamics are unfolding across pricing, trade flows, and fuel availability.

Supply Shock Rippling Through Marine Fuel Markets

At the center of the disruption is the Strait of Hormuz.

With the conflict now several weeks old, reduced flows of refined products from the Middle East, are tightening global fuel oil supply. The situation is further worsened by storage and production constraints in the region.

The impact is already visible in pricing.

According to the report’s March data, bio-bunker prices surged sharply following the Iran attacks. Some benchmarks show significant month-over-month increases across key hubs like Singapore and Rotterdam.

(Source: Prima CarbonZero)

At the same time, biofuel markets themselves are showing bullish momentum. They are driven not only by policy signals like the US RFS, but also by the broader energy market reaction to the conflict.

Related: Iran War Market Turmoil is Quietly Supercharging Biofuel Profit

This is a critical point: bio-bunkering is not insulated from fossil fuel volatility. It is increasingly coupled to it.

Biofuels as Part of the Solution

One of the most important insights from the report is that biofuels can help mitigate supply disruptions. But their help will only go so far.

As fuel oil imports into Asia tighten, especially at major hubs like Singapore, there is growing interest in increasing blending rates and redirecting biofuel flows. However, even under aggressive assumptions, the available supply of key biofuel components falls far short of replacing lost fossil fuel volumes.

In fact, maximizing export potential from major suppliers would only offset a fraction of the deficit in marine fuel demand.

This underscores a fundamental constraint in today’s market: bio-bunkering can support resilience, but it cannot yet scale fast enough to act as a full substitute during large-scale supply shocks.

Trade Flows and Bunkering Patterns Shifting in Real Time

The Iran war is also driving structural changes in how shipping routes and bunkering demand are evolving.

With vessels increasingly avoiding the Suez Canal and rerouting via the Cape of Good Hope, fuel demand is shifting toward alternative ports, including emerging hubs in Africa.

This is more than a temporary logistical adjustment. It is reshaping:

• Where fuel is consumed

• Where bio-bunkering infrastructure is needed

• How suppliers think about regional market access

At the same time, rising freight costs and fuel price volatility are complicating bunkering strategies. These factors now require operators to balance availability, pricing, and route efficiency in new ways.

Pricing Volatility Changing Commercial Behavior

The disruption is not just physical; it is financial, too.

Shipping companies are already responding by introducing mechanisms to manage risk. For example, emergency bunker surcharges are being deployed to offset the impact of volatile fuel prices and uncertain supply.

This signals a broader shift. Fuel cost volatility is becoming a more central factor in shipping economics, and biofuels are part of that equation.

Meanwhile, upstream pressures are building as well. The report shows solid gains in feedstock prices, including used cooking oil (UCO) and POME, adding further upward pressure on biofuel costs.

Policy Remains an Important Driver

Interestingly, policy frameworks like the EU Emissions Trading System (EU ETS) continue to shape long-term incentives. However, their short-term impact has been overshadowed by market forces.

EU ETS costs accounted for a relatively smaller share of total bio-bunker costs in March. Meanwhile, fuel price movements dominated overall economics.

This highlights a key dynamic in the current environment:

• Policy defines direction.

• Geopolitics defines pace.

Where Bio-Bunkering Stands

The Iran war is acting as a stress test for the bio-bunkering market, and the results are mixed.

On one hand, the crisis is reinforcing the strategic value of biofuels as:

• A diversification tool

• A partial hedge against fossil supply disruptions

• A part of the broader decarbonization pathway

On the other hand, it is exposing key limitations:

• Constrained feedstock availability

• Insufficient scale to replace fossil fuels in a supply shock

• Growing exposure to global commodity volatility

Perhaps most importantly, it is accelerating the need for a more flexible, diversified marine fuel system. This includes biofuels, but it also extends to other alternatives such as methanol, LNG, and emerging low-carbon fuels.

Get the Full Picture with Bio-Bunkering Report

These are just a few of the dynamics shaping the bio-bunkering market in the wake of the Iran war.

ResourceWise’s Bio-Bunkering At a Glance: March 2026 report provides deeper insight into:

• Pricing movements across key hubs

• Feedstock and biofuel market trends

• Shifting trade flows and bunkering demand

• The evolving role of biofuels in a disrupted energy system

For a complete view of the data and analysis behind these trends, download the full report now.