Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Prediction Today) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
100% | 0% | 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 |
|---|---|
| O/U 0.5 | 100% |
| O/U 1.5 | 100% |
| O/U 2.5 | 100% |
| O/U 3.5 | 100% |
| Both Teams to Score | 100% |
| Both Teams to Score in First Half | 100% |
| 1st Half O/U 0.5 | 100% |
| 1st Half O/U 1.5 | 100% |
| 1st Half O/U 2.5 | 100% |
| Borussia Dortmund O/U 0.5 | 100% |
| Borussia Dortmund O/U 1.5 | 100% |
| AS Roma O/U 0.5 | 100% |
| AS Roma O/U 1.5 | 100% |
| Borussia Dortmund 1st Half O/U 0.5 | 100% |
| Borussia Dortmund 1st Half O/U 1.5 | 100% |
| AS Roma 1st Half O/U 0.5 | 100% |
| AS Roma 1st Half O/U 1.5 | 100% |
| Borussia Dortmund (-1.5) | 0% |
| AS Roma (-1.5) | 0% |
| Borussia Dortmund (-2.5) | 0% |
| AS Roma (-2.5) | 0% |
| O/U 4.5 | 0% |
| O/U 5.5 | 0% |
| Borussia Dortmund O/U 2.5 | 0% |
| AS Roma O/U 2.5 | 0% |
| Both Teams to Score in Second Half | 0% |
| 2nd Half O/U 0.5 | 0% |
| 2nd Half O/U 1.5 | 0% |
| 2nd Half O/U 2.5 | 0% |
| Borussia Dortmund 2nd Half O/U 0.5 | 0% |
| Borussia Dortmund 2nd Half O/U 1.5 | 0% |
| AS Roma 2nd Half O/U 0.5 | 0% |
| AS Roma 2nd Half O/U 1.5 | 0% |
Market context
Borussia Dortmund and AS Roma are scheduled to meet in a pre-season friendly on 15 August at 11:30 AM ET, with settlement occurring at 15:30 that same day. The 0% implied probability on additional markets suggests either minimal trading activity or strong consensus that supplementary betting options will not materialise for this fixture. Over the past 48 hours, no material shift in fixture status or venue confirmation has altered the landscape, though pre-season schedules remain fluid as clubs finalise their preparation calendars ahead of domestic league campaigns.
Friendlies involving European clubs of this stature typically generate modest ancillary market interest compared to competitive fixtures. Historical precedent shows that club friendlies settle markets at lower volumes than league or cup matches, with many sportsbooks limiting the range of available wagers. The timing—mid-August during summer break—compounds this, as trading liquidity concentrates on domestic league openers rather than warm-up matches. Roma's fixture congestion and Dortmund's ongoing squad adjustments may further suppress speculative positioning.
Traders should monitor official team announcements regarding squad availability and any last-minute fixture changes through to settlement. Injury updates or unexpected withdrawals could theoretically prompt market expansion, though the window for such developments is narrow. Confirmation of final team sheets typically arrives within 24 hours of kick-off, leaving minimal time for new markets to establish meaningful liquidity. The settlement deadline sits just two hours post-match, constraining any post-game market adjustments.
Methodology
This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Prediction Today, which mirrors the Polymarket order book directly.
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
- 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.
- What does Polymarket cost to trade?
- Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.
- 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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