Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Sport Prediction) Pick polygram.ink (preferred broker) |
96% | 4% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
96% | 4% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| August 22 | 96% |
| August 25 | 93% |
| August 31 | 83% |
| September 15 | 71% |
| September 30 | 56% |
Market context
The market assesses whether direct US military strikes against Iranian territory will occur between now and end-September 2026. The 96% implied probability reflects the current absence of active hostilities following the April 2024 Iranian missile barrage and subsequent US-led air defence operations, alongside the broader regional de-escalation trend established after the January 2020 Soleimani assassination and retaliatory Iranian strikes.
Historical precedent suggests long periods of US-Iran military restraint punctuated by sudden escalation. The 2019–2020 cycle saw months of tension without strikes, then rapid escalation. The 2015 nuclear agreement period demonstrated that formal diplomatic channels can sustain ceasefires for years, though the Trump administration's 2018 withdrawal and subsequent "maximum pressure" campaign proved fragile. Current regional dynamics differ: Israeli operations in Gaza and Lebanon have consumed American military focus, whilst Iranian proxy activity has contracted measurably since mid-2024.
Traders should monitor three variables closely. First, any significant Iranian attack on US personnel or allies—particularly in Iraq or the Gulf—could trigger immediate retaliation. Second, developments in Israeli-Iranian tensions remain a forcing function; escalation there could pull the US in directly. Third, the US presidential transition in January 2025 introduces policy uncertainty; incoming administrations have historically recalibrated Iran strategy. Reuters reported in November 2024 that regional intelligence assessments favour continued restraint, though this baseline shifts rapidly with tactical incidents. The settlement window extends through September 2026, capturing nearly two full years of geopolitical exposure.
Methodology
Sports-specific comparison page for US-Iran ceasefire continues through 2026?. Polymarket's live quote (Polygon order book) plus platform attributes for the three reference venues. Sports markets reward liquidity — Polymarket and Betfair are materially deeper than Kalshi or Manifold.
Resolution & payout
Sports markets typically settle on official final-whistle plus league confirmation. Polymarket uses UMA Optimistic Oracle with a source URL per contract — usually official league data feeds or ESPN/Soccerway. Two-hour dispute window, then smart-contract payout in USDC.
UK Frequently Asked Questions
- Are prediction markets better than sports betting?
- Prediction markets tend toward tighter odds than bookmakers because they use peer-to-peer exchange rather than bookmaker margin. On major matches, Polymarket quotes typically sit 2-5% closer to the true probability model than bet365 or DraftKings.
- When do sports markets resolve?
- Typically within hours of the official final whistle. Polymarket uses UMA Optimistic Oracle with source URLs pointing at official league data feeds — e.g. the Premier League for EPL markets, UEFA for Champions League, FIFA for World Cup.
- 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%.
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