By SCM International Desk I Friday, August 07, 2025
WASHINGTON — In an unprecedented attempt to monetize control over one of the world’s most critical energy chokepoints, Iran has proposed levying a transit fee of 5 percent to 7 percent on the value of all commercial cargo passing through the Strait of Hormuz.
The move, confirmed by senior Iranian officials during multi-nation negotiations, represents a dramatic effort to convert strategic geography into a massive revenue stream. Under the draft agreement, vessels carrying cargo to or from China would be explicitly exempt, signaling a stark geopolitical divide in how global maritime commerce would be treated in the Persian Gulf.
If fully enforced at pre-conflict shipping volumes, a 7 percent fee on cargo passing through the narrow waterway could yield roughly $385 million per day. That equates to more than $100 billion annually—an amount generated with almost no collection overhead, delivering an estimated 97 percent pure profit margin.
The sheer scale of Tehran’s financial ambition has startled international economists and shipping industry leaders. At pre-war commercial traffic baseline levels, the projected annual yield from the proposed fee would rival or surpass the full-year net profits of the world’s most lucrative multinational corporations, including Alphabet, Apple, Microsoft, and Nvidia.
Furthermore, a $100 billion annual windfall would eclipse the historical collections of the Suez Canal Authority—which generated roughly $9 billion to $10 billion in peak pre-crisis years—by 15 to 20 times. Unlike canal systems, which require extensive maintenance, dredging, and navigational upkeep, Iran’s proposed levy is essentially a toll on an open natural strait.
The exemption for Chinese commerce highlights Beijing’s unique standing in Tehran. As the single largest buyer of Iranian crude oil and a key diplomatic partner, China has maintained commercial access across the region.
By creating a two-tiered system—where Western-aligned traffic is subjected to steep fees or physical obstruction while Chinese trade moves freely—Tehran is attempting to weaponize maritime access to redraw economic alliances in the Middle East.
Security analysts note that such a dual framework could incentivize global shippers to reflag vessels or route goods through Chinese intermediaries to bypass the toll, fundamentally altering global trade logistics.
The proposal faces immediate pushback from maritime authorities, insurance syndicates, and foreign governments.
Under the United Nations Convention on the Law of the Sea (UNCLOS), straits used for international navigation are governed by the regime of transit passage, which explicitly prohibits bordering states from levying tolls on foreign vessels simply for passing through. Bordering countries may charge fees only for direct, specific services rendered, such as pilotage or harbor assistance.
”Compulsory transit tolls in an international strait violate foundational principles of international maritime law,” said a joint statement from major shipping associations, including BIMCO and the International Chamber of Shipping. “Setting this precedent jeopardizes global trade far beyond the Persian Gulf”.
In addition, major insurance syndicates, such as Lloyd’s of London, have cautioned that paying tolls to entities linked to Iran’s military infrastructure—including the Islamic Revolutionary Guard Corps (IRGC)—could violate Western sanctions, rendering vessels uninsurable.
The Strait of Hormuz, a narrow passage measuring just 21 miles wide at its narrowest point, is the artery through which roughly one-fifth of the world’s petroleum and liquefied natural gas (LNG) passes.
Strategic Vulnerability: Because alternative overland routes—such as Saudi Arabia’s East-West Pipeline and the UAE’s Fujairah pipeline—can handle only a fraction of normal Gulf exports, the strait remains an indispensable pathway for global energy markets.
Escalation of Conflict: Following rounds of military tension and direct strikes between Iran, Israel, and the United States, Iranian forces increased oversight along maritime corridors, restricting commercial flows and forcing global energy prices upward.
Transition to Commercialization: While historical precedent exists for state-controlled waterways collecting transit fees (such as Denmark’s Sound Dues, abolished in the 19th century), no sovereign state in the modern era has successfully codified a percentage-based tax on high-seas cargo transiting an international strait.
Tehran’s attempt to formalize these collection mechanics marks a shift from tactical military blockade to permanent economic leverage.
