Iran charges Hormuz fees by 2026?

Platform comparison

Market context

The underlying real-world event concerns whether Iran will officially announce and begin collecting mandatory fees from all commercial vessels for passage through the Strait of Hormuz, a move currently implied by the market at just 2% probability. On Polymarket, this contract trades with USDC on the Polygon network, where conditional tokens reflect the starkly low crowd-implied likelihood of the "Yes" outcome before the settlement window closes in August 2026.

Historically, similar attempts to monetise international waterways have faced fierce opposition under established maritime law, which generally prohibits tolls on open straits. The current 2% probability aligns with the US stance, where Secretary of State Marco Rubio explicitly stated that no country is permitted to charge fees on international waterways, a position that has remained consistent despite Iran and Oman's recent joint proposal to administer the strait with administrative fees[1][3]. While Iran insists payments would be obligatory, the US and Oman frame them as voluntary contributions for safety services, creating a significant diplomatic hurdle that keeps the market price suppressed[2][4].

Traders should monitor the upcoming discussions between Iran and Oman scheduled to begin next week, which will determine if a joint fee mechanism is adopted or if Tehran proceeds with unilateral charges[3]. A critical catalyst is the expiry of the current 60-day waiver period, under which Iran has forgone planned fees, after which the authority governing the strait may resume charging for security and environmental services[5][9]. Any formal announcement from Iran's Foreign Ministry confirming the transition from voluntary to mandatory fees, or a shift in US diplomatic rhetoric following the waiver's end, would be the primary signal to watch for a potential price surge[7][10].

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

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

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.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Polymarket Legit? trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

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.