Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Who Will Win) Pick polygram.ink (preferred broker) |
41% | 59% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
41% | 59% | 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 |
|---|---|
| December 31 | 41% |
| September 30 | 39% |
| August 31 | 9% |
| July 31 | 0% |
Market context
Iran has already shown that authorities can and do push connectivity down to near-zero when they want a hard security clampdown. The market’s **0% YES** implies the crowd sees a total blackout as the underdog, but that looks more like a statement about the current baseline than a judgement on Iran’s playbook: the country had a nationwide shutdown in November 2019, another total blackout in January 2026, and then an even longer wartime disruption from late February to late May 2026, with reported traffic near 1% of normal for extended periods.[2][3][8][10][19]
That history matters because the key question is not whether Iran *can* impose a blackout, but whether a trigger emerges before the settlement date. Comparable cases show the regime tends to use total or near-total cuts during protests or conflict, and restoration can be partial before reaching full normalisation, which leaves room for renewed action if unrest or military escalation returns.[3][6][13][15] With consensus effectively at zero, the only real value angle is contrarian: a trader backing Yes is implicitly betting on a fresh security shock or protest cycle, not a routine technical outage.[4][11]
Catalysts to watch are the obvious ones: domestic protest flare-ups, any new regional strike cycle, and official moves on telecom routing or mobile networks, because previous blackouts began alongside state security decisions rather than infrastructure failure.[6][7][12][16] Recent reporting in May showed authorities only started restoring access after the wartime blackout had run for 88 days, which underlines how quickly a new clampdown could again satisfy the market’s Cloudflare threshold if Iran chooses to isolate the country.[8][19]
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
Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.
Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.
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 Who Will Win. 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%.
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