Bunker disruption shaping ocean costs and routing
Global sea freight is being redefined by a sharp shift in bunker fuel dynamics, as disruption in the Strait of Hormuz begins to distort both supply and pricing across shipping networks.
What initially appeared as a regional constraint is now driving a broader imbalance, with fuel availability, rather than vessel capacity alone, emerging as a key determinant of service viability.
While global fuel supply remains sufficient in aggregate, access is becoming increasingly uneven. Asia has emerged as the focal point of pressure, as reduced crude flows, constrained refinery output and longer voyage patterns converge to tighten availability across major bunkering hubs.
Regional imbalance drives pricing divergence
The disruption to Hormuz has reduced seaborne crude flows by an estimated 16%, limiting feedstock availability for refineries, particularly in Asia where reliance on Gulf supply is high. At the same time, bunker markets have detached from crude benchmarks. Singapore VLSFO and other regional fuels are rising significantly faster than Brent and European benchmarks, reflecting localised scarcity rather than global oil fundamentals.
This divergence is now clearly visible across global hubs. Asian bunkering centres, including Singapore and Hong Kong, have seen prices increase by 70% or more, driven by tightening supply and a surge in demand linked to vessel rerouting. In contrast, Northern European and eastern US ports remain comparatively stable, with increases closer to 40–50%, supported by stronger supply resilience and less direct exposure to Middle East disruption.
Cape diversions are amplifying the imbalance. Longer voyage distances increase fuel consumption by 15–20% per journey, concentrating demand in already constrained locations. At the same time, reduced export availability from China is removing a key balancing mechanism, further tightening regional supply.
Global shipping systems sensitive to sudden shocks
Container shipping networks remain particularly sensitive to operational disruption. When vessels are delayed or rerouted, the effects can compound across multiple sailings as ships arrive out of sequence and ports face sudden surges in cargo volumes.
Similar dynamics were observed during earlier Red Sea disruptions, when vessel diversions and port congestion temporarily reduced effective shipping capacity across the global fleet. The current situation introduces comparable risks.
As carriers adjust routings and introduce additional surcharges linked to fuel costs and operational risk, freight markets are showing signs of increasing volatility. At the same time, demand conditions remain uneven across different trade lanes, meaning rate movements may diverge significantly between routes.
Availability constraints begin to affect operations
The challenge is no longer simply cost, but securing the right fuel in the right place. Very low-sulphur fuel oil (VLSFO), which underpins compliance for most of the global fleet, is becoming unevenly distributed, reducing flexibility in bunkering strategies and increasing operational risk.
Carriers are responding by adjusting refuelling patterns, often bunkering in Europe and carrying fuel into Asia to mitigate supply uncertainty. This shift is adding complexity to network planning and increasing working capital tied up in fuel.
Fleet capability is also a factor. Around 40% of container vessels are equipped with scrubbers and can use high-sulphur fuel oil, which remains more readily available. However, the majority of the fleet remains dependent on VLSFO, limiting the industry’s ability to adapt quickly to changing supply conditions.
As pressure builds, lead times for bunkering are extending, port choices are narrowing and contingency planning is becoming more critical. Early signs of strain are emerging across secondary bunkering ports, where tighter availability is already impacting scheduling flexibility.
Bunker costs reset the ocean freight cost base
Fuel is now the dominant cost driver for ocean carriers. Standard bunker adjustment factor (BAF) mechanisms, which rely on trailing averages, have not yet fully reflected the scale of recent increases. In the short term, this gap is being addressed through spot rate volatility and the introduction of emergency fuel and war-risk surcharges.
As BAF calculations roll forward, the underlying cost base is expected to reset at a higher level, even if bunker prices stabilise. This creates a structural shift in ocean freight pricing, with fuel acting as the primary driver of both rate levels and volatility.
If disruption persists, the implications will extend beyond pricing. Reduced fuel availability could begin to influence vessel deployment decisions, tightening effective capacity and extending transit times across key trade lanes.
In a market where fuel is a central constraint, Logicall supports customers through proactive route planning, close carrier coordination and real-time visibility of network and fuel dynamics. By aligning transport strategy with evolving bunker conditions, we help maintain flow, manage cost exposure and protect supply chain performance.