U.S. President Trump has floated a controversial new idea: that the United States, not Iran, should be the one charging 'tolls' for ships passing through the Strait of Hormuz.
This single comment dramatically reframes the escalating crisis in one of the world's most critical oil chokepoints. It shifts the debate from a simple 'open versus closed' waterway to a much more complex question: who has the right to get paid for passage? This idea directly collides with decades of international maritime law and the unified position of U.S. allies.
To understand how we arrived here, we need to trace the events of the past few weeks. First, Iran made a bold move. Its Islamic Revolutionary Guard Corps (IRGC) began operating a de facto 'toll booth,' guiding ships through a corridor for a fee, with some payments reportedly settled in Chinese yuan. This transformed a long history of harassment into an active revenue stream, normalizing the idea of paying for passage and forcing a U.S. response.
Second, Washington's reaction has been inconsistent. Just a day before mentioning tolls, President Trump threatened to bomb Iranian infrastructure if the strait wasn't reopened. Yet, only days earlier, he had told allies to "take the lead," suggesting the U.S. might not guarantee security. This oscillation between coercion and burden-sharing created confusion and market uncertainty.
Third, the economic stakes are incredibly high. With Brent crude oil hovering near $110 a barrel and war-risk insurance premiums skyrocketing, the cost of shipping has surged. A toll of $2 million per supertanker could add about $1 per barrel, and when combined with insurance, the total cost could rise by nearly $5 per barrel. This directly feeds into global inflation.
President Trump's 'U.S. toll' remark cleverly inserts a third option between military action and withdrawal. It attempts to counter Iran's gambit by proposing a competing monetization scheme. However, this path is fraught with peril. It violates the UN Convention on the Law of the Sea (UNCLOS), which guarantees toll-free passage, a principle just reaffirmed by G7 ministers. It also complicates relations with allies and Oman, the co-coastal state. For markets, this introduces a new tail risk: a 'dueling tolls' scenario that keeps uncertainty, insurance costs, and oil prices painfully high.
- UNCLOS: The United Nations Convention on the Law of the Sea is an international agreement that establishes a legal framework for all marine and maritime activities. Part III specifically guarantees the right of 'transit passage' through international straits without charges.
- IRGC: The Islamic Revolutionary Guard Corps is a powerful branch of the Iranian Armed Forces, often involved in maritime operations in the Persian Gulf.
- Brent Crude: A major benchmark for global oil prices. Its price is a key indicator of the health of the world economy and geopolitical stability.