Rising Shipping Costs Squeeze Global Refinery Margins
Higher transport expenses and seasonal maintenance are creating significant margin pressure for refinery operators.
Updated on Oct. 21, 2026 in Oil and Gas
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Global refinery crude oil throughputs saw a decline in September 2026, driven by seasonal maintenance cycles within OECD countries. The resulting supply constraints have been compounded by rising logistics expenses for regional operators.
Why it matters
Operators face tightened margins as seasonal maintenance cycles reduce product availability while simultaneously driving up logistics costs. These shifts force a reevaluation of procurement strategies and regional inventory management to mitigate the impact of rising transit expenses.
Global refining throughputs dropped in September 2026 as shipping costs surged by as much as $40 per barrel for crude transported from the Mideast. These pressures have significantly impacted refining margins across Asian markets.
The details
The downturn stems from coordinated seasonal maintenance across OECD countries, which effectively constrained available product supplies. This scarcity has been exacerbated by a significant increase in shipping costs, forcing refineries in Asia to absorb higher input prices. Operators must now navigate the dual pressures of reduced throughput volumes and elevated delivery premiums for crude oil sourced from the Mideast.
Timeline
September 2026: Global refinery throughputs declined and Asian refining margins fell.
Market Landscape
The decline in September 2026 throughput follows the established pattern of IEA-tracked seasonal maintenance across OECD nations. This development underscores how routine infrastructure downtime can disproportionately impact global markets when combined with regional supply chain shocks.
Refineries and downstream businesses should review their logistics contracts to determine their vulnerability to the $40 per barrel spike in Mideast shipping costs. Owners must factor these higher input premiums into their immediate production cost projections.
The takeaway
The recent volatility highlights the need for refineries to maintain flexible sourcing options to offset regional maintenance-related disruptions. Monitor upcoming monthly throughput reports from OECD facilities to track the duration of these maintenance windows and their impact on global product stocks.
Further reading
For broader trends impacting energy supply and pricing, see the Oil and Gas section.
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Do you expect higher refinery costs to lead to significantly higher fuel prices for your household?
