Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Polymarket Tax UK) Pick polygram.ink (preferred broker) |
73% | 27% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Trade this market → |
Polymarket (direct) polymarket.com |
73% | 27% | 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 |
|---|---|
| August 31 | 73% |
| August 15 | 64% |
Market context
The underlying event is whether the United States and Iran announce a diplomatic deal that specifically sets out obligations on shipping through the Strait of Hormuz before the market deadline. That matters because the current structure is narrower than a general ceasefire: the text has to amount to an official agreement or substantially similar instrument, and it must include Iranian commitments tied to permitting, restoring or increasing vessel traffic.
The 61% crowd price is consistent with a market that has already seen partial precursors. Reuters reported in June that negotiators were working on a framework aimed at restoring shipping through the strait, while later coverage noted that indirect talks continued but with no clear breakthrough and that Iranian officials have sometimes denied that formal US talks are under way[3][1]. That mix of an existing MoU-style framework, repeated extensions, and continuing ambiguity usually supports a mid-range probability rather than a clean yes-or-no outcome, because traders are effectively pricing both implementation risk and the chance that any further text falls short of the market’s definition.
For accessibility, the practical angle is regulatory rather than geopolitical. If the venue is treated as a gambling-style product for German users, the GlüStV framework can matter because it restricts unauthorised online betting and may affect whether access is blocked or frictioned. In the US, CFTC reach is relevant because event-contract style markets can draw scrutiny where the underlying resembles a swap or derivative rather than a traditional wager. “No-KYC up to $1,500” means a user can usually interact without identity verification until cumulative activity crosses that threshold, which widens access but does not remove geo-blocking, sanctions screening or platform-level compliance checks.
The near-term catalysts are official statements, not rumours: a signed text, a Treasury sanctions update, or a scheduled round of talks in Doha, Muscat or Geneva would be the clearest triggers, while denials or deferrals would weigh on the yes case. Reuters said on 4 August that Qatar’s mediators were making progress, but Iranian officials still said no US negotiations were scheduled, which leaves the market sensitive to any sudden announcement rather than incremental diplomacy[1].
Methodology
This overview of US-Iran Hormuz Agreement 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. Polymarket Tax UK 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.
- What happens during a tax audit?
- You're responsible for documenting your trades. Polymarket Tax UK exports a full transaction history (CSV/PDF) for tax reporting. In an audit you'll need to present these documents.
- Are prediction markets gambling?
- Legally unclear in most jurisdictions. Some interpretations classify them as wagering (gambling regulation applies), others as derivatives (financial regulation applies). There's no global precedent specifically for on-chain prediction markets.
- 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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