Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Prediction Market UK) Pick polygram.ink (preferred broker) |
74% | 26% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | See live odds → |
Polymarket (direct) polymarket.com |
74% | 26% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | See live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | See live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | See live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | See live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| Spread -1.5 | 74% |
| Spread -2.5 | 64% |
| Spread -3.5 | 59% |
| 1H Spread -2.5 | 53% |
| 1H Spread -3.5 | 51% |
| Panthers O/U 19.5 | 50% |
| Bills O/U 18.5 | 50% |
| Bills O/U 19.5 | 50% |
| Panthers O/U 18.5 | 50% |
| Bills O/U 20.5 | 50% |
| 1H O/U 20.5 | 50% |
| 1H Moneyline | 50% |
| Panthers O/U 17.5 | 50% |
| 1H O/U 21.5 | 50% |
| O/U 37.5 | 49% |
| O/U 38.5 | 46% |
| Panthers vs. Bills | 25% |
| Spread -1.5 | 21% |
Market context
The Carolina Panthers will face the Buffalo Bills on 15 August at 1:00 PM ET in what is scheduled as a preseason contest. In prediction markets, a YES share represents a bet that the Panthers will win; a NO share bets on a Bills victory. The current crowd-implied probability of 25% for a Panthers win reflects market participants' assessment that Buffalo enters as the stronger side. Settlement occurs at 17:00 ET on market close, with the outcome determined by the final score alone—ties or cancellations without a rescheduled game would split the pot evenly between YES and NO holders.
Preseason NFL games carry distinct statistical patterns compared to regular-season matchups. Buffalo has consistently fielded competitive rosters in recent seasons, whilst Carolina has undergone significant roster reconstruction. Historical data from preseason contests shows that teams with established quarterback depth and defensive continuity tend to outperform rebuilding franchises, particularly in August when coaching staff prioritise player evaluation over win-loss records. The 25% probability assigned to Carolina aligns with typical market pricing for the underdog in such matchups, though preseason volatility—driven by injury management and playing-time allocation—can produce unexpected results.
Key variables affecting the outcome include injury status updates in the days preceding the game, coaching decisions on starter participation, and weather conditions at the venue. The Bills' recent preseason performance and any roster adjustments announced by either franchise could shift market sentiment. Traders should monitor official team injury reports and coaching statements released in the week leading to kickoff, as preseason games often see significant player rotation that impacts competitive balance.
Live Data & Statistics
Live stats load when the match begins. Current market odds are shown above. Trading volume: $134K.
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
- What's the difference between YES and NO shares?
- A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.
- 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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