What Transit Fees Cannot Legally Do — and What the Strait of Hormuz Reveals

The Strait of Hormuz is 33 miles wide at its narrowest point. About 130 vessels cross it daily under normal conditions — roughly one-fifth of global seaborne oil trade, plus liquefied natural gas, container cargo, and dry bulk. In August 2026, that number has fallen to between eight and 15 vessels per day.

The drop is not the result of a naval blockade by a rival power or a natural disaster. It is the product of a fee regime Iran established in May 2026, formalized through its Persian Gulf Strait Authority, after US-Israel military strikes began in February. Ships that wish to transit must now navigate Iranian demands for approval, potential charges, and the threat that unapproved vessels will be targeted.

What the strait reveals is not merely a diplomatic standoff. It is a stress test of international maritime law, global energy economics, and the question of how long a state can profit from controlling geography it did not create.

What happened

The timeline matters for understanding what is at stake.

In February 2026, US and Israeli military strikes against Iranian targets escalated into sustained conflict. Iran responded by asserting control over maritime traffic in the Strait of Hormuz, which borders its territory. By May, Iran had formalized a fee regime through the Persian Gulf Strait Authority — effectively converting de facto leverage into an institutionalized toll system.

The International Maritime Organization (IMO) has confirmed 64 violent incidents involving commercial vessels since the conflict began, resulting in 17 deaths. By late July, more than 6,000 seafarers had been stranded. A tanker wrecked off Oman was found discharging oil into the sea.

The US Navy responded by establishing a presence that turned away 55 ships, according to recent reporting. Washington describes its actions as maintaining freedom of navigation. Iran describes them as a blockade. Both characterizations capture part of what is happening — and omit the rest.

What international law says

Under the United Nations Convention on the Law of the Sea (UNCLOS), straits used for international navigation are governed by a “transit passage” regime established in Part III. Article 38 grants all ships and aircraft the right of transit passage — defined as “continuous and expeditious transit” for the purpose of passing through the strait.

Coastal states bordering such straits may not suspend transit passage. They cannot charge fees for it. They must not impede it, though they retain authority over territorial integrity and may establish traffic schemes for safety. The regime exists precisely because straits like Hormuz are geographic accidents — natural chokepoints that no single state created but that all states depend on.

Iran is a party to UNCLOS. The fee regime it established in May 2026 sits in direct tension with its treaty obligations.

The IMO has been explicit. Its secretary-general stated that tolls in the strait violate international law. Eight major shipping associations urged the UN to oppose transit fees, warning that such charges would undermine transit passage rights, raise energy prices, and fuel inflation worldwide.

International law is clear. Enforcement is another matter.

What each party wants

The diplomatic track running through Oman reveals competing bottom lines.

Iran wants joint management of the strait with Oman as mediator, designated safe shipping lanes, and the possibility of service fees framed as compensation for security provision. Its foreign minister, Abbas Araghchi, has stated the strait will not reopen until Washington meets certain conditions, including sanctions relief and payment for war damage.

The US demands free navigation without Iranian tolls or approval requirements. It has signaled willingness to negotiate but characterizes Iranian fee demands as extortion. Trump has described the US as “only semi-negotiating” with Iran — language that suggests conditional engagement rather than committed diplomacy.

Oman, which has long served as a backchannel between Washington and Tehran, is reportedly brokering a proposed 60-day interim deal. The framework would separate traffic into northern inbound and southern outbound lanes, restoring shipping while broader negotiations continue. A breakthrough on Hormuz could also pave the way for wider discussions, including nuclear talks.

The gap between these positions is not narrow. Iran wants leverage converted into revenue and recognition. The US wants the status quo ante restored without concessions. Oman wants de-escalation that preserves face for both sides.

What the economics show

Brent crude has risen to $84.43 per barrel — up 16 percent since the conflict began. The increase reflects not a supply shortage but a risk premium: uncertainty about when, or whether, normal transit resumes.

Insurance costs have surged. VLCC (very large crude carrier) marine insurance premiums are at their highest levels since 2024. War risk insurance payouts have multiplied as vessels navigate contested waters. Shipping companies face compounding costs: higher premiums, longer routes around the Cape of Good Hope, delayed deliveries, and stranded crews.

The geographic distribution of harm is uneven. Asia feels the impact most acutely. Japanese, Indian, Chinese, and South Korean economies depend on Middle Eastern energy imports that transit Hormuz. Rising diesel, fertilizer, and plastic costs flow directly through consumer prices. Europe has more diversified supply routes but remains exposed to price signals set in global markets.

Despite energy volatility, Asian stocks have shown resilience. Japan’s Nikkei rose 1.9 percent in recent trading, reflecting investor confidence that a diplomatic resolution remains possible. US stocks approached record highs on similar expectations — though those gains proved fragile when conflicting signals from Washington and Tehran clouded the outlook.

Tim Waterer, an energy analyst at Citi, noted that “the lack of concrete movement is keeping a risk premium in the price.” He warned that even if a deal is reached, “history suggests these understandings can prove fragile,” limiting potential price drops.

What coercion can and cannot do

Iran’s strategy rests on a simple calculation: control the chokepoint, and the world pays attention. Geographically, the strait is real leverage. Economically, the disruption is measurable. Politically, the pressure on consumer-facing governments in Europe and Asia creates diplomatic openings.

But coercion has an expiration date.

Prolonged disruption creates incentives for alternatives. European energy planners have accelerated discussions about Cyprus natural gas fields expected to supply the continent by 2028. Shipping companies are modeling longer routes around Africa. Consumers facing sustained price increases become politically restless. Even Iran’s own economy suffers from isolation — recent reporting describes soaring food prices hurting Iranian families as trade restrictions bite both ways.

An analyst at Al Jazeera, Mohammad Reza Farzanegan, put it directly: “Iran can exploit dependence on Hormuz today, but prolonged disruption will erode that leverage.”

The pattern is familiar. States that weaponize geography gain immediate attention and short-term bargaining power. Over time, the same strategy accelerates the very adaptations that make the chokepoint less essential. The question is not whether alternatives exist — they always do — but whether they are available before the coercing state’s own costs become unsustainable.

What a deal would look like

The 60-day interim framework Oman is brokering offers a template. Separated lanes reduce the risk of incidents while preserving Iranian security concerns. Restored shipping lowers insurance premiums and removes the risk premium from oil prices. A time-limited agreement gives both sides room to claim progress without permanent commitments.

But the underlying questions remain unresolved. Iran wants sanctions relief and war reparations. The US wants unconditional freedom of navigation. These are not negotiating positions that converge easily. They reflect fundamentally different assessments of what happened, who bears responsibility, and what the strait ought to be.

International law provides an answer: transit passage without fees, without approval requirements, without threats to unapproved vessels. But international law does not enforce itself. It requires either a willing compliance that Iran has not shown, or enforcement mechanisms that the US has not fully deployed.

What the gap reveals

The Strait of Hormuz in 2026 is not an anomaly. It is a demonstration of what happens when a state with geographic advantage decides that international norms are inconvenient, and when the states that depend on those norms lack a mechanism to restore them without escalating conflict.

The shipping associations’ warning to the UN was clear: tolls violate established law and harm livelihoods worldwide. The IMO confirmed the incidents and deaths. Oman is brokering a path forward. Oil prices reflect the uncertainty.

What remains uncertain is whether the interim deal holds, whether broader negotiations follow, and whether the strait returns to something resembling normal transit — or whether this becomes the new baseline: a contested chokepoint where geography provides leverage, international law provides standards, and diplomacy provides the only bridge between them.

The law says what transit fees cannot do. The strait shows what happens when someone tries anyway.