A single statistic underpins the worldwide focus on a recent Iranian legislative move: one‑fifth of all oil traded internationally transits the Strait of Hormuz. The announcement by lawmaker Ebrahim Azizi that Tehran intends to impose fees on vessels using the waterway has therefore resonated far beyond the Persian Gulf. Azizi told state media that Iran is developing mechanisms to regulate maritime traffic through the strait, with ships required to pay charges.
He did not disclose the fee amounts or when they would take effect. The Islamic Consultative Assembly, Iran’s 290‑member parliament, is expected to consider any legislation that follows.
The strait itself is narrow, measuring roughly 33 miles at its widest point. Daily, about 21 million barrels of oil and petroleum products travel through this corridor, originating from Saudi Arabia, Iraq, Kuwait, the United Arab Emirates and Iran. Because of this volume, any interruption can influence global fuel prices within days.
Azizi did not clarify whether the fees would apply to all vessels or only those flying certain flags, nor did he specify whether the revenue would fund navigational safety, environmental protection or general state budgets. The lack of detail is itself being read as a signal.
Iran has previously threatened to close the strait. In 2019, after the United States withdrew from the nuclear deal and reimposed sanctions, Iranian forces seized tankers. In 2023, the Islamic Revolutionary Guard Corps harassed commercial shipping with fast boats and drones. The current approach differs in that it relies on administrative notices and port authority paperwork rather than direct interdiction, but the practical outcome could resemble earlier tactics: higher costs and longer delays for shipping.
The United States has long championed free passage through the strait. The current administration, which promotes a free and open Indo‑Pacific, now confronts a potential choke point at the opposite end of Asia.
The U.S. Navy’s Fifth Fleet, headquartered in Bahrain, patrols these waters. Any dispute over the new fees would test American naval commitments in a region already strained by Houthi attacks in the Red Sea. Countries across Asia depend heavily on Hormuz‑transited energy.
Japan sources roughly 90 percent of its crude from the Middle East, Taiwan relies on the strait for liquefied natural gas, and the Philippines—a U.S. treaty ally—monitors its fuel expenses amid Gulf tensions. European Union members also have a stake; while the EU buys little Iranian oil because of sanctions, its states import heavily from Saudi Arabia and Iraq, so any fee‑driven rise in insurance premiums or transit times would affect European refineries.
Israel, a direct adversary of Iran, is likely to view the fee plan as another escalation. The United Kingdom, which maintains naval assets in the Gulf, is expected to coordinate closely with Washington on any response. The announcement arrives as Iran grapples with mounting economic pressure.
Sanctions have slashed its oil exports by more than half since 2018, inflation exceeds 40 percent, and the rial has depreciated sharply. Charging fees on ships that already pass through Iranian waters offers a revenue stream that circumvents the banking system and sanctions enforcement mechanisms.
International law generally treats straits used for global navigation as requiring innocent passage without levies. Iran is a signatory to the United Nations Convention on the Law of the Sea, though it has not ratified the treaty in full. Tehran argues that the Hormuz route is not an international strait but part of its territorial sea, a legal position that will be examined in diplomatic forums rather than courts.
For now, oil traders watch the strait and await concrete figures. Azizi provided none, and the mere uncertainty may be enough to push prices upward.
