Iran charges Hormuz fees by 2026?

Platform comparison

Market context

The market currently prices at 0% the prospect that Iran's government will formally announce and implement mandatory fees, tolls, or tariffs on commercial shipping transiting the Strait of Hormuz before end-August 2026. This represents a near-zero conviction among traders that such a policy materialises within the settlement window, despite Iran's demonstrated willingness to disrupt maritime commerce in the region. The conditional tokens on Polygon reflect minimal demand for YES exposure, with USDC liquidity concentrated entirely on NO positions.

Iran has threatened Hormuz passage restrictions repeatedly since 2018, particularly during periods of heightened US sanctions tension, yet has never formally instituted a general toll system applicable to all or defined vessel categories. The 2019 tanker seizures and drone incidents were framed as responses to specific provocations rather than revenue-generating policy. The Revolutionary Guards Corps has occasionally detained vessels and demanded payments, but these remained ad-hoc rather than announced mandatory schemes. This historical pattern—rhetorical escalation without systematic fee implementation—anchors the market's current pricing.

Traders should monitor Iranian statements following any significant escalation in regional tensions, US policy shifts towards Iran, or UN Security Council actions. The International Maritime Organization's stance on Hormuz transit rights and any formal Iranian communications to shipping authorities would constitute critical catalysts. Recent tensions in early 2024 saw Iranian threats spike without translating to toll announcements. The absence of formal infrastructure or international notification mechanisms for such fees suggests implementation barriers that may explain the market's scepticism.

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

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

UK Frequently Asked Questions

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 Kalshi UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

Is Polymarket legal in the UK?

Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.

Do I pay tax on prediction market profits in the UK?

UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.

How do I deposit on Polymarket from the UK?

UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.