Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Kalshi Alternative UK) Pick polygram.ink (preferred broker) |
58% | 42% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Trade this market → |
Polymarket (direct) polymarket.com |
58% | 42% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Trade this market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Trade this market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Trade this market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Trade this market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| December 31 | 58% |
| October 31 | 42% |
| September 30 | 25% |
| August 31 | 13% |
| July 15 | 0% |
| July 31 | 0% |
Market context
Iran has periodically threatened to impose transit fees or tolls on vessels passing through the Strait of Hormuz, one of the world's most critical shipping chokepoints through which roughly 21% of global petroleum trade flows. Such a policy would represent a significant escalation from Iran's current posture of occasional harassment and seizures of individual vessels. The market requires an officially announced, systematically applied fee structure—not ad hoc demands—to resolve affirmatively by end-August 2026.
Historical precedent suggests low probability for formalised charging. Iran has used the Strait as a leverage point during sanctions disputes and regional tensions, most notably threatening closures in 2019 and 2022, yet has never implemented a sustained toll regime. The 1982 UN Convention on the Law of the Sea explicitly prohibits strait states from collecting charges for passage through international waterways, creating legal barriers Iran would need to overcome. Previous Iranian rhetoric on Hormuz fees has remained rhetorical posturing rather than policy implementation. Across Polymarket, Kalshi, and Betfair, the 0% crowd probability reflects this historical pattern—traders assess the gap between Iranian threat-making and institutional follow-through as insurmountable within the timeframe.
Catalysts to monitor include Iranian statements during sanctions escalation cycles, particularly following US policy shifts or oil-price volatility. Reuters and regional maritime security analysts track Strait incidents closely; any formal announcement would likely surface through official Iranian government channels or IRGC statements. The absence of preparatory regulatory frameworks or international negotiations suggests traders view implementation as requiring geopolitical upheaval beyond current trajectories. Fee collection would demand enforcement capacity Iran has not demonstrated, making the 0% reading across platforms a reflection of structural rather than temporary scepticism.
Methodology
This page compares Iran charges Hormuz fees by 2026? specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. The live probability is the Polymarket mid; the comparison columns summarise each venue's fee structure, KYC, settlement currency and payment rails. Every CTA routes to Kalshi Alternative UK, which mirrors the Polymarket order book at 0% fees.
Resolution & payout
Settlement is the biggest difference between the four platforms: Polymarket on-chain in USDC (instant), Kalshi USD via CFTC (T+1), Betfair and Smarkets in local currency via bank withdrawal (T+1 to T+3). On-chain settlement clears in minutes — the fastest payout path of the four.
UK Frequently Asked Questions
- Polymarket vs Kalshi — which is better?
- Depends on your location. Kalshi is CFTC-regulated, US-only with full KYC. Polymarket is global, on-chain, no KYC up to $1,500. Polymarket has ~10x higher liquidity but higher regulatory risk.
- Which platform has the deepest liquidity?
- Polymarket — by a wide margin. Top markets reach $50-500M volume, Kalshi ~$200M cumulative, Betfair similar. Deeper liquidity means your trade moves the quote less.
- Is Betfair a Polymarket alternative?
- Only partially. Betfair Exchange is UK-focused with a sports-betting emphasis; they have politics markets but with thinner liquidity than Polymarket. Settlement in GBP/EUR, 2-5% commission on winnings.
- Polymarket vs Betfair Exchange: which is better for UK prediction trading?
- Betfair Exchange offers UKGC regulation, GBP settlement, and potentially tax-free winnings — but focuses on sports and politics only. Polymarket has deeper liquidity, 0% platform fee, global event coverage, and crypto/geopolitical markets Betfair doesn't offer. For UK traders: Betfair for regulated GBP sports markets; Polymarket for broader, global prediction events.
- Is Kalshi available in the UK?
- Kalshi is a US CFTC-regulated prediction exchange. UK residents can create accounts but must use USD and US payment methods. Kalshi's product range overlaps with Polymarket but with lower liquidity on most contracts. For UK traders, Polymarket typically offers better prices due to higher global volume.
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