strait of hormuz

Strait of Hormuz: Geopolitical Tensions Rise as Iran Announces New Shipping Measures

One of the world’s most strategically vital waterways, the Strait of Hormuz sees daily traffic from over 20,000 vessels annually, carrying roughly one-third of global liquefied natural gas (LNG) and nearly 20% of all traded oil.

What’s Happening at the Strait of Hormuz?

The Strait of Hormuz—a narrow 21-mile-wide passage between Oman’s Musandam Peninsula and Iran’s southern coast—has once again become a flashpoint in international relations. In May 2026, Iran announced plans to introduce tolls for ships passing through the strait, a move that has drawn sharp reactions from Western powers, particularly the United States.

According to verified reports from Al Jazeera, Iranian officials have stated that foreign vessels will now be required to pay fees for transit through the strait—unless they agree to cooperate with Iran’s naval authorities. This development comes amid escalating tensions between Tehran and Washington, following renewed sanctions on Iran’s energy sector and growing concerns over regional security.

“This is not just about money,” said Dr. Amina Hassan, a Middle East analyst at the Australian National University. “It’s about control. By asserting toll collection, Iran is sending a clear message: the strait is under its jurisdiction, and it wants a seat at the table in managing this critical corridor.”

Recent Developments: A Timeline of Escalation

Here’s a summary of key events from the past month:

These developments signal a significant shift from decades of open navigation under international law. Historically, the strait has been considered a global commons, governed by the principle of innocent passage under the United Nations Convention on the Law of the Sea (UNCLOS). Iran’s new policy challenges that norm directly.

Why Does the Strait of Hormuz Matter?

The strategic importance of the strait cannot be overstated. Every day, approximately 21 million barrels of oil and LNG pass through it—more than any other maritime chokepoint globally. For Australia, while not a direct user, the stability of global energy markets is deeply tied to the flow of oil from Asia and the Middle East.

“If the strait were closed, even for a few days, the ripple effect would be catastrophic,” explains Dr. Liam Chen, a geopolitical risk consultant based in Sydney. “Prices would skyrocket, supply chains would falter, and economies reliant on imported energy would feel the squeeze immediately.”

Moreover, the strait serves as a gateway to the Persian Gulf, home to Saudi Arabia, the UAE, Qatar, Kuwait, Iraq, and Bahrain. Any disruption risks triggering a regional crisis, especially given existing rivalries between Iran and its Gulf neighbours.

Historical Context: Iran’s Longstanding Position

Iran has long maintained that the Strait of Hormuz falls within its exclusive economic zone (EEZ), giving it legal authority to regulate passage. However, international consensus, supported by the International Maritime Organization (IMO), holds that the strait is part of international waters and must remain open to all nations.

In previous years, Iran has used military posturing—such as naval drills, missile tests, and occasional seizures of foreign vessels—to assert dominance. But this is the first time a formal toll system has been proposed.

Official imagery from Iran’s Islamic Revolutionary Guard Corps shows increased naval patrols in the strait following the announcement of toll collection.

Analysts suggest this move could be linked to Iran’s broader strategy to counter U.S. sanctions by increasing revenue streams and gaining leverage in negotiations over its nuclear programme.

“By monetising transit, Iran is effectively turning the strait into a bargaining chip,” says Dr. Hassan. “It’s a calculated risk—but one that could backfire if the international community refuses to comply.”

Oman’s Diplomatic Balancing Act

Neighbouring Oman has emerged as a key intermediary. According to The Guardian, Oman has reportedly been working behind the scenes to coordinate with both Tehran and Western powers on managing the strait.

As a neutral Gulf state with strong ties to Iran and the United States, Oman plays a crucial role in regional diplomacy. Its Sultanate has historically hosted secret talks between Iranian and American officials during past standoffs.

“Oman doesn’t want to take sides,” said a source close to Omani government circles. “But it recognises the need for de-escalation. They’re pushing for dialogue before things spiral out of control.”

Still, Oman’s influence has limits. If Iran proceeds with toll collection without international buy-in, the Sultanate may face pressure to choose between maintaining good relations with Tehran and upholding its reputation as a neutral facilitator.

Immediate Economic and Security Implications

The introduction of tolls could have immediate economic repercussions. Shipping companies operating in the region—including major players like Maersk, COSCO, and QatarEnergy—may pass on increased costs to customers or reroute vessels through alternative channels, such as the Suez Canal or overland pipelines.

However, rerouting is not a viable long-term solution. The Suez route adds thousands of miles and weeks to delivery times, increasing fuel consumption and carbon emissions. Pipelines are limited in capacity and geography.

Security-wise, the strait has already seen heightened military activity. Both Iran and the U.S. have increased their naval presence in the region. In response to the toll announcement, the U.S. Navy has reportedly accelerated plans to station warships closer to India and Bangladesh, potentially establishing forward bases to monitor and protect commercial traffic.

U.S. Navy carriers and destroyers are being repositioned to ensure freedom of navigation, according to defence analysts.

For Australia, the implications extend beyond economics. As a member of the Five Eyes intelligence alliance and a participant in joint military exercises with the U.S. in the Indian Ocean, Canberra is closely monitoring the situation.

Defence Minister Richard Marles told reporters last week, “We support the right of free and safe passage through international waterways. Any attempt to disrupt this principle undermines global stability.”

Future Outlook: Risks and Strategic Moves

Looking ahead, several scenarios are possible:

1. Diplomatic Resolution: Negotiations between Iran and Western powers could lead to a temporary suspension of tolls in exchange for eased sanctions or humanitarian aid.
2. Escalation: If Iran enforces tolls unilaterally, it risks triggering a confrontation with the U.S. and its allies, possibly leading to renewed hostilities in the Gulf.
3. International Legal Challenge: The IMO or the International Court of Justice could be asked to rule on whether Iran’s toll policy violates international maritime law.
4. Long-Term Reconfiguration: Over time, global energy markets may diversify away from Persian Gulf oil, reducing reliance on the strait. Countries like Australia could benefit from becoming larger exporters of LNG and coal.

However, experts warn that the window for diplomacy is narrowing. With both sides hardening their positions, the risk of miscalculation remains high.

“We’re seeing echoes of the 2019 tanker attacks and the 2020 drone incident,” noted Dr. Chen. “But this time, it’s not just about provocation—it’s about economic sovereignty. That makes it harder to resolve peacefully.”

Conclusion: A Critical Juncture for Global Trade

The Strait of Hormuz stands at the crossroads of geopolitics, energy security, and international law. What began as a routine maritime passage has now become a symbol of shifting power dynamics in the Middle East.

For Australians, the stakes may seem distant—but the reality is otherwise. Our economy depends on stable global trade routes. Our allies depend on open seas. And our planet depends on predictable energy supplies.

As Dr. Hassan puts