Iran and Oman’s proposal to jointly administer the Strait of Hormuz and collect administrative fees has prompted energy market participants to fear similar tolls in the Strait of Malacca. Investors worry this development could establish a precedent for taxing other critical maritime corridors.
Why are investors worried about a “toll booth” in the Strait of Malacca?
The prospect of maritime fees in the Strait of Hormuz has created uncertainty among commodity traders. Janiv Shah, vice president of commodity markets at Rystad Energy, told CNBC’s “Squawk Box Europe” on Monday that some investors are becoming “a little bit jittery” regarding a potential oil shock caused by tolls.
Shah suggested that if Iran successfully implements a tolling system at the Strait of Hormuz, a similar model could be applied to other vital waterways. He noted that the Strait of Malacca is the most significant concern from a volume metric perspective.
While the exact method of implementation remains unclear, Shah indicated that any such move would likely take significant time due to the massive scale of trade passing through the corridor.
What makes the Strait of Malacca a critical energy corridor?
The Strait of Malacca serves as the primary choke point for trade between Asia and Oceania. According to data from the U.S. Energy Information Administration (EIA), the waterway accounted for 29% of total maritime oil flows during the first half of 2025.
The composition of this traffic is heavily weighted toward energy products:
- Crude Oil: Estimated to comprise over 70% of total annual oil flows.
- Petroleum Products: Account for the remaining portion of the waterway’s traffic.
The strait is bounded by the coastlines of Indonesia, Thailand, Malaysia, and Singapore, making it a shared economic interest for all four nations.
Can coastal nations legally implement maritime tolls?
While the idea of charging for passage has surfaced, legal experts suggest such measures would face significant challenges. In April, Indonesia’s Finance Minister Purbaya Yudhi Sadewa suggested the possibility of introducing tolls on ships using the Strait of Malacca, though he later walked back the suggestion.
Under current international law, the establishment of a tolling system for transit through such straits would be illegal. International maritime regulations guarantee the right of free passage through straits used for international navigation.
Political leaders in the region have signaled their opposition to any disruption of trade. Following a meeting in Indonesia’s capital on Monday, Indonesian President Prabowo Subianto and Singapore Prime Minister Lawrence Wong both reaffirmed their commitment to the unimpeded passage of vessels through the strait.
How does the Malacca Straits Patrol prevent conflict?
A key distinction exists between the Strait of Hormuz and the Strait of Malacca regarding political stability. Hunter Marston, director of the Southeast Asia program at the Lowy Institute, stated in a June 23 note that while the Malacca Strait meets the definition of a choke point, it does not currently function as a “flashpoint.”
Marston attributed this stability to the Malacca Straits Patrol (MSP). This institutional arrangement is jointly managed by Indonesia, Malaysia, Singapore, and Thailand to ensure the waterway remains open to global trade.
According to Marston, this collective management benefits both the participating states and the global economy. He argued that without the MSP, the Malacca Strait would be just as vulnerable to “capricious closure” as the Strait of Hormuz.
Comparison of Maritime Choke Points
| Feature | Strait of Hormuz | Strait of Malacca |
|---|---|---|
| Primary Risk | Proposed administrative fees/joint administration | Potential for tolls |
| Management | Proposed Iran-Oman joint administration | Malacca Straits Patrol (MSP) |
| Oil Traffic | Approximately 20% of world oil traffic | 29% of maritime oil flows (H1 2025) |
What are the geopolitical risks of maritime choke points?
Analysts at the Center for Strategic International Studies (CSIS) stated in a July 1 analysis that Iran’s actions regarding the Strait of Hormuz demonstrate how controlling a maritime corridor can “significantly augment” a nation’s power and deterrence capabilities.
The analysts warned that the stakes are even higher in the South China Sea. They identified two strategically vital waterways that connect major economic centers: the Strait of Malacca and the Taiwan Strait.
The CSIS report noted that while rerouting options exist if these straits are interrupted, such shifts would come at a cost.
Frequently Asked Questions
What is the Strait of Hormuz?
The Strait of Hormuz is a narrow maritime corridor that typically handles approximately 20% of the world’s oil traffic.
Why is the Strait of Malacca important for oil?
Is it legal to charge tolls in international straits?
International law generally guarantees free passage through straits used for international navigation, making tolling systems illegal.
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