Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Prediction Today) Pick polygram.ink (preferred broker) |
6% | 94% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
6% | 94% | 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 | 6% |
| September 30 | 3% |
| May 31 | 0% |
| January 15 | 0% |
| January 31 | 0% |
| March 31 | 0% |
| February 28 | 0% |
| April 30 | 0% |
Market context
Russian forces remain positioned along the northern and western edges of Prymorske in Zaporizhzhia Oblast, with no significant territorial advances reported in the past 48 hours. The settlement, located roughly 15 kilometres south-west of Mariupol, has remained contested since early 2022, with control shifting several times before stabilising under Ukrainian administration in late 2022. Current front-line positions suggest Russian forces would need to break through multiple defensive lines and advance approximately 8–12 kilometres to encircle and capture the municipality entirely.
Historical precedent from the Donbas campaign indicates that capturing a full municipality against organised Ukrainian defence typically requires either a major operational breakthrough or a grinding multi-month offensive. Mariupol's fall in May 2022 took roughly three months of intensive urban combat; Sievierodonetsk fell in June 2022 after similar duration. Prymorske lacks the urban density of those cities but benefits from Ukrainian defensive preparation. The 0% crowd probability reflects the substantial distance between current lines and full municipal capture, combined with the compressed timeframe—just over 13 months remain until the January 2026 resolution date.
Traders should monitor Russian offensive tempo in the Zaporizhzhia sector, particularly whether Moscow commits additional reserves to this axis or maintains focus on the Pokrovsk direction further north. Ukrainian ammunition supplies and Western military aid announcements will shape defensive capacity. ISW map updates, which typically lag ground reality by several days, serve as the binding resolution mechanism; any Russian advance must persist through the resolution window without Ukrainian counter-offensive reversal.
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
At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.
On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.
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 Prediction Today. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.
- Is this market available outside the US?
- Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.
- 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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