1. FC Cologne vs. Real Sociedad San Sebastian

Platform comparison

Market context

Polymarket is pricing this 1. FC Köln v Real Sociedad San Sebastián friendly at **100% YES** in USDC on Polygon, so the contract is effectively treated as settled rather than as a live binary view on the match. For users holding the conditional tokens, that means the market is already fully aligned with the outcome logic and there is no remaining spread to trade around on the headline event itself.

That reading is easier to place when you compare it with the clubs’ recent meeting patterns. The teams have already met in this summer’s double-header, and Köln beat Real Sociedad 2-0 in the first game at the Franz-Kremer-Stadion, with goals from Luca Waldschmidt and Marius Bülter, which gives the fixture a recent on-pitch reference point rather than a purely theoretical one.[1][19] Their longer shared history is sparse but not random: UEFA records a 2-2 meeting in 1988/89, while the clubs’ official pages still frame the fixture as a notable cross-league test rather than a routine preseason slot.[5][11]

For a trader, the practical catalysts are scheduling and team news rather than form narratives. Köln’s club announcement said the match was set for Saturday 8 August at 15:30 local time at the RheinEnergieStadion, and also noted a closed-door meeting the night before, which can affect rotation, minutes and late squad changes.[4] That matters because friendlies are often shaped by travel, load management and call-ups more than by full-strength selection, and line-up leaks or last-minute venue changes are the main items to watch in the hours before kick-off.[3][4]

Sources: 1 · 2 · 3 · 4 · 5

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 Polymarket Scam?. 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%.