Iran charges Hormuz fees by September 30?

As of September 3, 2026, Polymarket prices “Iran charges Hormuz fees by September 30?” at 6% YES with $127K traded. No tracked wallet holds a position on this market, so there is no verdict.

Oman rejected Iran’s joint fee proposal, making unilateral charges by September 30 unlikely. Current odds reflect 8% YES, 92% NO.

What’s Happening

The diplomatic landscape surrounding the Strait of Hormuz shifted sharply in early September when regional officials confirmed that Oman rejected Iran’s proposal to jointly levy service fees on commercial shipping. This development directly contradicts a late-August claim by the Islamic Revolutionary Guard Corps (IRGC) that a bilateral agreement had been reached, with a high-ranking regional official stating Muscat declined consent even for voluntary environmental and security charges. The refusal removes the possibility of a Gulf state legitimizing the fee structure, which Tehran had framed as a protective measure, and it aligns with Washington’s position, as President Trump had previously threatened military action against the US ally if it cooperated with the Iranian plan [New York Post, Sep 03].

The question of whether Iran charges Hormuz fees by September 30 now hinges on Tehran’s unilateral capacity to enforce tolls without Omani participation. Analysts note that a 5% fee per barrel of crude oil could generate an estimated $18 billion to $25 billion annually for Iran, but this projection assumes unimpeded enforcement capacity, which is doubtful given the US Navy’s presence and the Pentagon’s recent war-cost estimates. Defense Secretary Pete Hegseth told the Senate on July 21 that the conflict with Iran would cost $37.5 billion by the end of September, explicitly framing the funding as necessary to “force Iran to meet our objectives” and maintain allied operations in the strait [Al-Monitor, Jul 21]. Meanwhile, Israeli Prime Minister Benjamin Netanyahu told his General Staff Forum that the regime in Tehran is “overthrowable” and that this mission is “imminent,” signaling a multi-front pressure campaign [Newsquawk, Sep 03].

Iran’s diplomatic push for fees has included promises of “special” treatment for friendly nations, as articulated by its envoy in early July, but the lack of any formal multilateral endorsement leaves the initiative isolated. The structural factor determining whether Iran charges Hormuz fees by September 30 is the physical enforcement capability of the IRGC Navy versus the combined deterrent of the US Fifth Fleet and regional navies. With Oman’s rejection now public, Tehran faces a choice between backing down or attempting a unilateral collection that would almost certainly trigger a direct military response, given the existing rules of engagement and the $37.5 billion war appropriation already approved for operations in the strait [Japan Times, Jul 05].

Traded on Polymarket — $127K Volume