Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Is Kalshi Legit) Pick polygram.ink (preferred broker) |
57% | 43% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | See live odds → |
Polymarket (direct) polymarket.com |
57% | 43% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | See live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | See live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | See live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | See live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| December 31 | 57% |
| October 31 | 42% |
| September 30 | 25% |
| August 31 | 11% |
| July 15 | 0% |
| July 31 | 0% |
Market context
Iran has been talking about charging commercial vessels for passage through the Strait of Hormuz, but the key market question is whether that becomes an official, generally applied payment regime rather than a one-off demand or a narrowly framed service charge. The legal backdrop is awkward: under the transit-passage rules cited by maritime-law specialists, straits used for international navigation are supposed to remain open, and mandatory tolls for mere passage are widely described as inconsistent with UNCLOS, even though coastal states can levy fees for specific services actually provided.[1][2][11][18]
That is why the current 0% crowd price looks less like a view on whether Iran can *claim* a right to charge, and more like a view on whether Tehran will formalise and implement a durable tariff before the deadline. Recent reporting has pointed to public Iranian claims that any payment would be an “environmental” or “navigation services” fee, alongside pushback from the IMO and others that there is no legal basis for mandatory transit tolls.[3][5][7][18] For traders, the catalysts are an Iranian cabinet, ministry, or parliamentary announcement that spells out scope, rates, and collection method, followed by evidence of actual enforcement against commercial shipping; without both, the market likely stays on the “No” side.
From an access and venue perspective, this is a regulatory-style event rather than a factual shipping forecast. German GlüStV issues matter because prediction-market access in Germany can be constrained by local gambling rules and platform controls, while US CFTC reach matters if the market is offered to or marketed at US persons, given the agency’s broad oversight of derivatives-like event contracts. If the venue advertises “no-KYC up to $1,500”, that usually means smaller balances or withdrawals can be used without full identity checks, but it does not remove legal or geofencing restrictions tied to jurisdiction, and it does not change how this specific market resolves.
Methodology
This overview of Iran charges Hormuz fees by 2026? reviews the four comparable platforms from a regulatory perspective: which is accessible in your jurisdiction, where KYC kicks in, how the platform is classified by your country of residence. Live probability is the Polymarket mid; comparison columns show regulatory status, KYC thresholds and settlement options for each platform.
Resolution & payout
On Polymarket, resolution runs on-chain via UMA Optimistic Oracle. USDC payout is instant and automatic, with no KYC. Tax treatment depends on your jurisdiction — in the US, gains are usually ordinary income; in the UK, often capital gains. Consult a tax professional for your situation.
FAQ
- Is Polymarket legal in my country?
- Polymarket is geo-blocked in the US/UK/EU. Actual usage via the Polymarket interface is not possible there. The legal status itself varies — many countries treat prediction markets as a gray area. Is Kalshi Legit has a different geo footprint.
- How are winnings taxed?
- Tax treatment varies by jurisdiction. In most countries, prediction market gains are treated as ordinary income or capital gains. We cannot provide tax advice — consult a tax professional for your specific situation.
- Can I trade anonymously?
- Pseudonymously, yes — up to the KYC threshold. Is Kalshi Legit stores an email address and wallet addresses rather than a legal name. Over $1,500 lifetime volume triggers KYC, after which identity is no longer anonymous.
- What happens during a tax audit?
- You're responsible for documenting your trades. Is Kalshi Legit exports a full transaction history (CSV/PDF) for tax reporting. In an audit you'll need to present these documents.
- Is there a withdrawal cap?
- No platform-side cap. You can withdraw any amount provided KYC is complete. SEPA bank withdrawals over €15,000 trigger additional anti-money-laundering checks (statutory obligation for all platforms).
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