The modern shipping industry survives on one central principle: the ability to manage risk. Every maritime voyage carries commercial uncertainty, but in recent years, geopolitical instability has transformed risk from a peripheral concern into a defining operational reality. Piracy, sanctions, regional conflicts, trade restrictions, and military confrontations are no longer isolated disruptions affecting limited routes. They now directly shape freight economics, contractual performance, insurance exposure, and global supply chains.
The recent tensions surrounding the Strait of Hormuz and the wider conflict across the Middle East are among the clearest examples of this shift. Attacks on commercial shipping, threats of blockade, and escalating regional hostilities have forced shipowners, carriers, insurers, charterers, and cargo interests to rapidly reassess how maritime trade is conducted through politically sensitive waters. In response, the industry has witnessed the aggressive re-emergence of war risk surcharges and emergency operational charges as standard commercial mechanisms rather than exceptional responses reserved for rare crises.
The commercial consequences have been immediate and far-reaching. Freight costs have increased significantly across several trade routes. Insurance underwriters have imposed stricter conditions and higher premiums. Transit times have become unpredictable due to rerouting decisions and enhanced security measures. The cumulative effect is ultimately passed through the commercial chain affecting traders, importers, exporters, manufacturers, energy markets, and economies dependent upon uninterrupted maritime commerce.
Against this background, one question has become increasingly important: when are war risk surcharges legally and contractually enforceable?
Understanding War Risk Surcharges
A vessel transiting through a high-risk area faces risks that extend far beyond ordinary commercial exposure. Carriers may incur elevated war risk insurance premiums, additional crew compensation obligations, diversion expenses, security costs, delays, and increased exposure to physical damage or operational disruption. These extraordinary burdens are often transferred through the contractual chain by way of a War Risk Surcharge (“WRS”).
In practical terms, a war risk surcharge is an additional amount imposed by a carrier to recover costs associated with operating in or near politically unstable or conflict-affected regions. Different carriers may use different terminology — including emergency operational surcharge, security surcharge, conflict surcharge, or additional war risk premium — but the commercial purpose remains largely the same.
Since early 2026, carriers operating through the Strait of Hormuz and surrounding Middle Eastern routes have increasingly implemented such charges on a per-container basis. What was once viewed as an extraordinary commercial adjustment is gradually becoming an embedded feature of global shipping operations in geopolitically volatile regions.
Importantly, war risk surcharges must be distinguished from war risk insurance premiums themselves. Insurance premiums are paid by carriers to underwriters to secure coverage against conflict-related exposure. A surcharge, by contrast, is often the carrier’s attempt to commercially recover those increased expenses — along with associated operational costs — from charterers, consignees, or cargo interests further down the contractual chain. The growing use of these charges has also generated criticism. Consignees and cargo owners frequently argue that surcharges are imposed without transparency, are commercially excessive, or bear little relationship to the actual costs incurred by carriers. This has led to increasing legal scrutiny over the contractual and legal basis for their imposition.
The Contractual Foundation for Surcharges
The enforceability of any war risk surcharge depends primarily upon contract.
Carriers cannot ordinarily impose additional charges arbitrarily. Their right to do so must arise from either an express contractual provision or a broader legal justification recognised under applicable law.
In many cases, the relevant authority is found directly within the Bill of Lading. Modern Bills of Lading frequently contain clauses granting carriers broad discretion to recover extraordinary expenses arising from war, hostilities, piracy, blockades, sanctions, or related geopolitical disturbances.
Certain clauses expressly permit the recovery of additional insurance costs, diversion expenses, and emergency operational expenditures arising from conflict situations. For example, some standard carrier clauses provide that the carrier may impose surcharges to recover all additional expenses incurred as a result of war, civil unrest, piracy, blockade, or similar events affecting the voyage.
Even where an express “War Risk Surcharge” clause is absent, carriers may attempt to justify additional charges under more general contractual provisions. These may include clauses relating to freight and charges, liberty clauses, deviation provisions, or clauses dealing with circumstances adversely affecting the carrier’s ability to safely perform the voyage.
The legal position becomes stronger where charterparty war risk clauses are incorporated into the Bill of Lading. Most standard form charterparties contain sophisticated war risk provisions, commonly based on BIMCO CONWARTIME or VOYWAR clauses. These clauses regulate the rights and obligations of owners and charterers when a vessel encounters a designated war risk area or faces heightened security threats during a voyage.
Such clauses may permit the vessel owner to refuse transit through dangerous areas, reroute voyages, recover additional operational costs, or take protective measures necessary to safeguard the vessel, crew, and cargo. Where properly incorporated into downstream contractual arrangements, these rights may also provide the legal basis for imposing corresponding charges upon cargo interests.
However, commercial reality often moves faster than contractual drafting. In practice, carriers frequently impose surcharges even where contractual wording is ambiguous or insufficiently clear. The operational pressures associated with navigating conflict zones — including security concerns, insurance exposure, delays, diversion costs, and crew safety obligations — often compel carriers to act immediately, leaving the legal justification to be argued later.
This is where disputes emerge.
When can a legal challenge to surcharges succeed?
Although war risk surcharges may be commercially understandable, commercial necessity alone does not automatically make them legally enforceable. Their validity ultimately depends upon principles of contractual interpretation, reasonableness, and equitable allocation of risk.
- The Reasonableness Standard
One of the most common grounds for challenge is the argument that a surcharge has been imposed arbitrarily or unreasonably.
Shipping lines frequently impose flat charges on a per-container basis without providing detailed explanations regarding calculation methodology or actual losses incurred. In many situations, cargo interests argue that the surcharge bears little connection to the carrier’s genuine operational exposure.
Disputes also arise where:
- the vessel never entered a designated war risk area,
- the voyage was rerouted entirely,
- cargo was discharged before reaching the affected region,
- or the consignee was already subjected to increased freight, delay costs, or additional operational charges.
In such circumstances, tribunals and courts may closely examine whether the surcharge reflects a genuine commercial necessity or amounts to an arbitrary financial burden imposed upon cargo interests without sufficient contractual basis.
The assessment is highly fact-specific. Much depends upon:
- the wording of the relevant contract,
- the governing law,
- industry practices,
- the factual risks actually encountered,
- and the dispute resolution mechanism chosen by the parties.
Nevertheless, the broader principle remains consistent: charges imposed unreasonably, disproportionately, or without contractual authority may be vulnerable to legal challenge.
b. Force Majeure and War Risk Events
War and armed conflict may also engage force majeure provisions contained within commercial contracts.
However, invoking force majeure is rarely straightforward. Courts and arbitral tribunals generally require strict compliance with the wording of the clause. A carrier seeking to rely upon force majeure as justification for imposing additional costs must demonstrate that:
- the triggering event falls within the clause,
- the event genuinely prevented or hindered performance,
- and all contractual procedures for invoking force majeure were properly followed.
Failure to satisfy these requirements may render the surcharge legally vulnerable.
Equally important is the question of causation. A carrier must usually demonstrate a clear connection between the conflict event and the additional costs being passed down through the contractual chain. As a result, whether a war risk surcharge may validly operate as a force majeure measure depends heavily upon the specific wording of the contract and the factual circumstances of the voyage.
c. Unjust Enrichment
Another potentially powerful challenge arises under the doctrine of unjust enrichment.
The principle is simple: one party should not unfairly benefit at the expense of another without lawful justification.
In the context of war risk surcharges, claims of unjust enrichment may arise where carriers recover substantially more than the losses actually incurred or impose overlapping financial burdens upon cargo interests through multiple recovery mechanisms.
For example, disputes may arise where:
- freight rates are simultaneously increased,
- additional surcharges are imposed,
- cargo is rerouted,
- operational liabilities are shifted to consignees,
- and insurance costs are separately recovered.
Where the cumulative effect produces disproportionate recovery without clear contractual justification, a consignee or cargo interest may argue that the carrier has been unjustly enriched. Such claims are particularly relevant where the surcharge mechanism lacks transparency or where the carrier refuses to disclose the basis upon which additional charges were calculated.
The Evolving Future of War Risk Allocation
War risk surcharges have become an increasingly significant feature of modern commercial shipping, as geopolitical tensions, instability and armed conflicts continue to increase. In the future, contracts are likely to contain elaborate war risk provisions that allow carriers the benefit of surcharges when necessary. While such surcharges are often commercially necessary to offset increased insurance premiums, operational risks, and security costs, disputes will frequently arise regarding their contractual basis, reasonableness, allocation, and recoverability under charterparties and bills of lading.
The legal and commercial implications of these disputes require careful analysis of contractual clauses, market practices, sanctions regimes, and principles of risk allocation. Shail and Partners assists shipowners, charterers, traders, and insurers in navigating complex war risk surcharge disputes through strategic advisory, contract review, claims management, and arbitration support, helping clients protect their commercial interests while ensuring compliance with the evolving maritime risk framework.
