Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Kalshi UK) 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% |
| AFC Ajax O/U 0.5 | 100% |
| AFC Ajax O/U 1.5 | 100% |
| SC Heerenveen O/U 0.5 | 100% |
| SC Heerenveen O/U 1.5 | 100% |
| AFC Ajax 1st Half O/U 0.5 | 100% |
| AFC Ajax 1st Half O/U 1.5 | 100% |
| SC Heerenveen 1st Half O/U 0.5 | 100% |
| 2nd Half O/U 0.5 | 100% |
| SC Heerenveen 2nd Half O/U 0.5 | 100% |
| AFC Ajax O/U 2.5 | 1% |
| 2nd Half O/U 2.5 | 1% |
| AFC Ajax 2nd Half O/U 0.5 | 1% |
| SC Heerenveen 2nd Half O/U 1.5 | 1% |
| AFC Ajax (-1.5) | 0% |
| SC Heerenveen (-1.5) | 0% |
| AFC Ajax (-2.5) | 0% |
| SC Heerenveen (-2.5) | 0% |
| O/U 4.5 | 0% |
| O/U 5.5 | 0% |
| SC Heerenveen O/U 2.5 | 0% |
| SC Heerenveen 1st Half O/U 1.5 | 0% |
| Both Teams to Score in Second Half | 0% |
| 2nd Half O/U 1.5 | 0% |
| AFC Ajax 2nd Half O/U 1.5 | 0% |
Market context
Ajax host Heerenveen in the opening weekend of the 2025–26 Eredivisie season on 16 August. Polymarket's "More Markets" contract for this fixture currently settles at 0% YES, reflecting either minimal liquidity, a technical listing issue, or traders' assessment that the conditional token specification remains unresolved. The underlying match itself carries standard expectations: Ajax are Amsterdam's dominant club with five consecutive league titles through 2024, whilst Heerenveen finished ninth last season. The 0% price on Polygon-settled USDC suggests the market is either awaiting clarification on what "More Markets" specifically references—additional betting outcomes, live-in-play markets, or derivative contracts—or that early season fixtures attract sparse trading volume before the campaign gains momentum.
Historical precedent from Polymarket's Eredivisie coverage shows that opening-weekend matches typically trade with thin order books until 48 hours before kickoff, when European retail and institutional traders activate positions. The settlement window closing at 14:45 UTC on match day itself creates a compressed trading window; comparable early-season fixtures in prior years saw probability shifts of 15–25 percentage points in the final six hours as information crystallised. Traders should monitor official Polymarket announcements regarding the exact settlement criteria, Ajax's pre-season injury reports (particularly their attacking depth), and any late team news from Heerenveen's preparation schedule. Dutch media outlets including Voetbal International typically publish squad confirmations 72 hours before fixtures.
Methodology
We track AFC Ajax vs. SC Heerenveen - More Markets across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.
Resolution & payout
Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.
Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.
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'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.
- 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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