Proposed U.S. Toll on Hormuz Shipping: Details, Contradictions, and Market Impact

President Trump has announced that the United States will impose a 20% levy on cargo transiting the Strait of Hormuz, a stance that contradicts his administration’s own position that such charges breach international law.

The declaration came on Monday as tensions escalate between Washington and Tehran over dominance of the strategic channel, a vital conduit for global energy. Cross-strait hostilities over the past week have effectively dissolved a cease-fire reached just a month earlier.

Following the joint U.S.-Israeli strikes on Iran in February that initiated the conflict, Iranian forces have sporadically targeted commercial vessels in the strait, attempting to divert traffic toward coastal lanes—a possible prelude to imposing its own transit fees.

The following key points outline the current situation:

What Exactly Did President Trump Propose?

In unveiling the toll plan, the president characterized the measure as a means for the U.S. to recoup expenses incurred in safeguarding ships through the passage.

“The Hormuz Strait is OPEN, and will remain OPEN, with or without Iran,” Trump posted on social media. He stated that the U.S. would impose the 20% charge to cover “any and all costs necessary,” framing it as “a matter of FAIRNESS,” and indicated a renewed blockade of Iranian ports.

This is not the first such threat from Trump. He floated the idea last month following a tentative cease-fire with Iran, despite language in that accord that Tehran interprets as affirming its jurisdictional claim over the strait. The memorandum barred toll collection for 60 days but left the door open for later imposition.

Mechanics of the Proposed U.S. Toll

Specifics remain vague. Trump did not clarify how the 20% fee would be assessed or enforced.

Neither the president nor his advisors have reconciled this stance with earlier assertions by senior administration figures.

Last month, Secretary of State Marco Rubio asserted that levies on the Strait of Hormuz are impermissible. “No country is allowed to charge tolls or fees on an international waterway. That’s existing international law,” he remarked.

The toll announcement, coupled with directives to reinstate the Iranian port blockade, signals a narrowing of options for resolving the conflict.

Economic and Market Implications of the Toll

Imposing a 20% charge on cargo value could more than double oil shipping costs through the strait, according to experts.

For a sizable tanker transporting two million barrels, the levy could exceed $30 million in additional expense, likely translating to higher consumer prices.

Given the steep cost, some analysts question whether the fee will ever be implemented. Regional ship operators currently fear military escalation more than the toll itself, experts note.

Precedents for Strait Tolls Elsewhere

A relevant comparison exists at the Strait of Malacca in Southeast Asia, where roughly 23 million barrels of oil pass daily.

Vessels traversing that jointly managed waterway—overseen by Singapore, Indonesia, and Malaysia—incur charges only for specific services like towage or pilotage through narrow sections; passage itself is free.

The geopolitical climate there differs markedly: the three administering nations have maintained relative stability and avoided interstate war for nearly sixty years.

Iran’s Reaction to the U.S. Proposal

Iranian Foreign Minister Abbas Araghchi highlighted the irony of Trump’s toll announcement given Washington’s prior rejection of Tehran’s similar intent.

On social media, Araghchi conceded Trump was “absolutely right” that those ensuring safe transit deserve compensation—then reasserted Iran’s own claim to that role.

With apparent sarcasm, he added: “20% is of course too much. We will be fair.”

Since Iran’s effective blockade earlier in the war, its officials have consistently voiced plans to monetize the passage. Tehran and Oman, bordering the strait’s southern shore, are reportedly examining mechanisms for jointly charging transiting vessels.

Oman’s framework draws partly on Malacca’s model, though it remains uncertain whether contributions would be voluntary or compulsory.

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