U.S. Treasury Secretary Scott Bessent threatened to impose sanctions on Oman if the nation cooperates with Iran in the Strait of Hormuz [1].
The warning comes as the U.S. seeks to prevent Iran from establishing a toll system for international shipping in one of the world's most critical maritime chokepoints. Such a regime could disrupt global energy markets and challenge the U.S. strategic interests in the Middle East.
Bessent issued the warning on Thursday, May 28, 2026 [1]. The U.S. government is concerned that any cooperation between Oman and Iran to monetize transit through the strait would create a precedent for restricting the free flow of commerce [2].
Oman has historically maintained a role as a diplomatic mediator between Washington and Tehran. However, the prospect of a coordinated toll system, which would likely require Omani cooperation due to its geography, has prompted this direct response from the Treasury Department [1].
The Strait of Hormuz is the only sailed sea exit from the Persian Gulf. Because a significant portion of the world's oil and liquefied natural gas passes through these waters, any attempt to implement a toll system would affect international shipping costs and stability [2].
U.S. officials said the measure is intended to ensure that the strait remains open and accessible to all international vessels. The Treasury Department has not specified the exact nature of the sanctions that would be triggered if Oman proceeds with the cooperation [1].
“U.S. Treasury Secretary Scott Bessent threatened to impose sanctions on Oman”
This escalation signals a shift in U.S. strategy toward Oman, traditionally a neutral intermediary. By threatening sanctions, the U.S. is prioritizing the prevention of an Iranian-led financial or regulatory grip on the Strait of Hormuz over the maintenance of diplomatic flexibility with Muscat. If implemented, a toll system would likely increase global oil prices and grant Iran significant economic leverage over regional energy exports.
