Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Kalshi UK) Pick polygram.ink (preferred broker) |
50% | 50% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
50% | 50% | 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 |
|---|---|
| Candidate U | 50% |
| Candidate V | 50% |
| Candidate W | 50% |
| Candidate X | 50% |
| Candidate Y | 50% |
| Candidate Z | 50% |
| Candidate AA | 50% |
| Candidate AB | 50% |
| Candidate AC | 50% |
| Candidate AD | 50% |
| Candidate AE | 50% |
| Candidate AF | 50% |
| Candidate AG | 50% |
| Candidate AH | 50% |
| Candidate AI | 50% |
| Candidate AJ | 50% |
| Candidate AK | 50% |
| Candidate AL | 50% |
| Candidate AM | 50% |
| Candidate AN | 50% |
| Candidate AO | 50% |
| Candidate AP | 50% |
| Candidate AQ | 50% |
| Candidate AR | 50% |
| Candidate AS | 50% |
| Candidate AT | 50% |
| Candidate AU | 50% |
| Candidate AV | 50% |
| Candidate AW | 50% |
| Candidate AX | 50% |
| Candidate AY | 50% |
| Candidate AZ | 50% |
| Candidate BA | 50% |
| Candidate BB | 50% |
| Candidate BC | 50% |
| Candidate BD | 50% |
| Candidate BE | 50% |
| Candidate BF | 50% |
| Candidate BG | 50% |
| Candidate BH | 50% |
| Candidate BI | 50% |
| Candidate BJ | 50% |
| Candidate BK | 50% |
| Candidate BL | 50% |
| Candidate BM | 50% |
| Candidate BN | 50% |
| Candidate BO | 50% |
| Candidate BP | 50% |
| Candidate BQ | 50% |
| Candidate BR | 50% |
| Candidate BS | 50% |
| Candidate BT | 50% |
| Candidate BU | 50% |
| Candidate BV | 50% |
| Candidate BW | 50% |
| Candidate BX | 50% |
| Candidate BY | 50% |
| Candidate BZ | 50% |
| Candidate CA | 50% |
| Candidate CB | 50% |
| Candidate CC | 50% |
| Candidate CD | 50% |
| Candidate CE | 50% |
| Candidate CF | 50% |
| Candidate CG | 50% |
| Candidate CH | 50% |
| Candidate CI | 50% |
| Other | 50% |
| Scott Jennings | 20% |
| Kush Desai | 17% |
| Alina Habba | 16% |
| Kari Lake | 14% |
| Lara Trump | 13% |
| Laura Loomer | 13% |
| Anna Kelly | 12% |
| Lauren Bis | 11% |
| Tricia McLaughlin | 11% |
| Monica Crowley | 11% |
| Kaelan Dorr | 10% |
| Harrison Fields | 10% |
| Spencer Pratt | 10% |
| Beni Rae Harmony | 9% |
| Kayleigh McEnany | 7% |
| Taylor Rogers | 5% |
| Katie Pavlich | 5% |
| Hogan Gidley | 5% |
| Natalie Harp | 5% |
| Katie Miller | 5% |
| Pat Adams | 4% |
| Liz Huston | 4% |
| Ari Fleischer | 4% |
| Matthew Boyle | 4% |
| Elizabeth Pipko | 4% |
| Margo Martin | 3% |
| Rachel Campos-Duffy | 3% |
| Maria Bartiromo | 3% |
| Karoline Leavitt | 3% |
| Jake Paul | 2% |
| Steven Cheung | 1% |
Market context
Market consensus: 50% chance of next press secretary?. Prediction markets aggregate real capital to produce this probability signal. This market will resolve according to the next individual who the White House announces has been picked to be the White House Press Secretary who replaces Katie Zacharia by Decembe…
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
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
- 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 Kalshi UK. 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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