Iran charges Hormuz fees by August 31?

Prediction markets put the probability at 52%: Iran charges Hormuz fees by August 31. Currently, markets are divided (52% YES, 48% NO).

What’s Happening

Iran and Oman have jointly presented the Trump administration with a proposal to administer the Strait of Hormuz that includes the collection of "administrative fees" by the two nations, four sources told NBC News on July 3, 2026. Any such charge would mark a dramatic break from the pre-war status quo, when cargo vessels transited the waterway without paying. The plan follows a memorandum of understanding signed last month in which the U.S. and Iran agreed ships could transit the strait "safely and freely," though the interim deal barred fee collection during its opening phase. Whether Iran charges Hormuz fees by August 31 now turns on how quickly Washington, Muscat and Tehran can convert this framework into an operational tolling regime. [NBC News, Jul 03]

The diplomatic track runs alongside sharp disagreement over control. Two senior Iranian sources told Reuters on July 1 that Tehran is determined to win international recognition of its authority over the strait and its right to levy fees on ships entering or leaving the Gulf — "even if it has to do so by force." Iran interprets the interim deal as preserving its control over all passage, while withholding collection during the interim phase. Oman, a U.S. ally that initially opposed any toll scheme, delivered a formal proposal on which shipping companies would pay "voluntary" service fees, per multiple reports. The US, Europe and Gulf Arab states remain concerned the sultanate will institutionalize a joint tolling system with Iran, hardening a wartime disruption into a permanent cost on global trade. [Reuters, Jul 01]

The structural factor is whether "voluntary" fees become mandatory and enforced before the deadline. An uneasy calm has held since the June 25 Iranian attack on the Singapore-flagged Ever Lovely, with bilateral Iran-GCC talks proceeding separately from the U.S.-Iran negotiations in Bürgenstock. Oman has told European officials there is "no way back" to the pre-war status quo, signaling transiting ships may have to pay. Resolution of whether Iran charges Hormuz fees by August 31 hinges on U.S. sign-off, GCC acceptance, and a functioning collection mechanism — none yet finalized. [Insurance Journal, Jun 27]

Traded on Polymarket — $76K Volume

Lower-volume market on Polymarket ($76K). Wider spreads expected — enter with limit orders and be aware of slippage risk. Currently 52c YES.