Iran charges Hormuz fees by 2026?

Platform comparison

Market context

Iran and Oman are advancing a joint proposal to impose mandatory service fees on commercial vessels navigating the Strait of Hormuz, a move that directly challenges long-standing US objections to monetising international waterways. While the United States insists the strait must remain toll-free to comply with international law, Iranian officials argue these charges are for essential maritime services rather than transit tolls, creating a sharp diplomatic divergence that defines the current market probability.

Historically, the Strait of Hormuz has operated without mandatory fees, unlike the voluntary contribution models seen in the Straits of Malacca and Singapore. The 60-day toll-free window agreed in the recent US-Iran memorandum of understanding, which expires shortly, sets a clear precedent for future negotiations; however, Iran’s deputy foreign minister has stated Tehran will impose its own fees if no agreement with Oman is reached, suggesting the current 2% crowd-implied probability may underestimate the likelihood of unilateral action [3][4].

Traders should monitor the upcoming joint discussions between Tehran and Muscat scheduled to begin next week, as well as any formal announcements regarding the transition from the temporary waiver to permanent fee collection [1][2]. The critical catalyst remains whether the US administration, under President Trump, will acquiesce to a modified fee structure or maintain its hardline opposition, a decision that will likely be clarified before the settlement window closes in August 2026 [5][8]. Recent reports confirm that while Oman favours voluntary fees, Iran insists on mandatory payments, a discrepancy that could trigger immediate unilateral implementation if diplomatic talks stall [2][7].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Iran charges Hormuz fees by 2026? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Best Prediction Markets UK, which mirrors the Polymarket order book at 0% fees.

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 Best Prediction Markets UK. 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.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

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.