Iran’s Hormuz Toll Demand Tests More Than Oil Prices

What is actually known

U.S. Secretary of State Marco Rubio told ASEAN counterparts in Manila that Iran’s demand to control and collect tolls in the Strait of Hormuz would threaten the global economy and set a precedent for other chokepoints, according to AP. That framing should be handled carefully. The verified story is not that Iran has built a stable, codified toll regime. It is that Iran has asserted a right to condition passage, require coordination, and seek safe-passage payments.

That distinction matters. Reuters reported in March that Iran told the U.N. Security Council and the International Maritime Organization that “non-hostile vessels” could transit Hormuz if they coordinated with Iranian authorities and complied with Iranian safety and security rules. The U.S. Treasury’s OFAC later warned that Iranian demands for toll payments for safe passage could create sanctions risk, including through cash, digital assets, swaps, offsets, or in-kind channels.

So the live issue is coercive discretion, not ordinary port dues. A port can charge for services. An international strait is different. Hormuz includes territorial seas, but the relevant maritime rule is transit passage through an international strait, not a vague claim about “international waters.”

The practical exposure is mostly Asian

Hormuz is not just a headline oil route. The EIA says 20.9 million barrels per day of oil moved through the strait in the first half of 2025, about 20% of global petroleum liquids consumption and one-quarter of maritime oil trade. It also says 11.4 Bcf/d of LNG, more than 20% of global LNG trade, transited Hormuz in that period.

Asia bears the heaviest exposure. EIA says China, India, Japan, and South Korea together accounted for 74% of Hormuz crude and condensate flows in the first half of 2025. The IEA says about 80% of 2025 oil and product flows through Hormuz went to Asia, along with almost 90% of LNG flows.

That is why oil-price-only coverage misses the point. LNG is harder to reroute than crude, especially Qatari LNG. If shipowners hesitate, insurers raise war-risk premiums, or payment channels become sanctions-sensitive, utilities and refiners face contract and delivery problems before consumers see the full price effect.

The legal issue is narrow, and not simple

UNCLOS Article 26 limits charges merely for passage through the territorial sea, and Part III protects transit passage through international straits. That supports the objection to a discretionary Hormuz toll. But the easy treaty-compliance version is incomplete: neither Iran nor the United States is a party to UNCLOS. The argument therefore depends partly on customary international law and on whether enough maritime and trading states are willing to act as if the rule is binding.

Iran may claim security justifications. The U.S. and many maritime states will argue transit passage cannot be suspended or monetized. The uncertainty is not academic. If a toll-for-safety model becomes normalized at Hormuz, other coastal or military powers will notice. Bab el-Mandeb, Malacca, the Turkish Straits, and contested South China Sea routes are not identical, but the precedent would be useful to anyone seeking leverage over trade.

The test is coordination, not rhetoric

The useful response is not to pretend the U.S. alone owns freedom of navigation. The exposed parties include Asian importers, Gulf exporters, shipowners, insurers, and LNG buyers. China and India’s practical choices matter more than diplomatic phrasing. Qatar’s position matters because its LNG has no practical pipeline bypass.

Emergency stocks can soften oil-market shocks; the IEA says members agreed in March to make 400 million barrels available. But reserves do not restore LNG flows or remove crew, insurance, and sanctions risks. The real test is whether governments object early, keep insurance and shipping functioning, and refuse to treat safe passage through Hormuz as a purchasable favor.