Iran charges Hormuz fees by 2026?

Platform comparison

Market context

Iran is poised to introduce mandatory maritime service fees for commercial vessels navigating the Strait of Hormuz, framing the core dispute as Tehran charging for security and navigational aid rather than traditional tolls. The market currently implies a 2% probability of this event occurring, positioning the "Yes" outcome as the clear underdog against consensus expectations that global pressure will force a toll-free passage. While Washington and Tehran agree on temporary fee waivers, the long-term value spot likely sits contrarian to the crowd; Iran’s determination to levy these charges, described by Foreign Ministry spokesperson Esmaeil Baghaei as covering services like insurance and environmental safeguards, suggests the underdog may hold hidden value if diplomatic talks stall [1][2].

Historical precedents from the 2026 Iran war reveal that Iran previously attempted to block the strait entirely, only reopening it after a provisional ceasefire, indicating a pattern of using maritime access as leverage rather than a stable revenue stream [3]. Unlike standard international straits governed by UNCLOS, which prohibit tolling for innocent passage, Iran has not ratified this treaty, leaving the legal relevance uncertain and allowing Tehran to propose formalising fees split with Oman [4]. This context frames the current 2% probability as potentially too low, given that Iran’s 10-point peace plan explicitly included formalising these transit charges, suggesting the consensus may be underestimating the regime’s willingness to monetise the waterway despite US objections [4].

Traders must watch for official announcements from the IRGC regarding the implementation of a "tollbooth" system for foreign-flagged vessels, which has already been instituted for rigorous vetting accompanied by fees [1]. The primary catalyst is the expiration of the initial two-month toll-free window, where divergences between US Vice President JD Vance’s call for permanent freedom and Iran’s insistence on service fees will determine the outcome [1]. Recent warnings from Maersk’s CEO that allowing such fees sets a "dangerous precedent" highlight the intense commercial resistance, yet the settlement window ending in August 2026 leaves ample time for Iran to enforce its maritime service policy if negotiations fail [5].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Who Will Win 2026. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.