Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Polymarket Scam?) Pick polygram.ink (preferred broker) |
50% | 50% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Place a position → |
Polymarket (direct) polymarket.com |
50% | 50% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Place a position → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Place a position → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Place a position → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Place a position → |
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 | 21% |
| Laura Loomer | 15% |
| Anna Kelly | 12% |
| Kari Lake | 12% |
| Alina Habba | 11% |
| Kush Desai | 10% |
| Monica Crowley | 10% |
| Lara Trump | 10% |
| Kaelan Dorr | 9% |
| Tricia McLaughlin | 9% |
| Harrison Fields | 9% |
| Spencer Pratt | 9% |
| Lauren Bis | 6% |
| Kayleigh McEnany | 6% |
| Taylor Rogers | 5% |
| Hogan Gidley | 5% |
| Natalie Harp | 5% |
| Ari Fleischer | 5% |
| Katie Miller | 5% |
| Beni Rae Harmony | 5% |
| Pat Adams | 4% |
| Liz Huston | 4% |
| Katie Pavlich | 4% |
| Elizabeth Pipko | 4% |
| Margo Martin | 3% |
| Matthew Boyle | 3% |
| Rachel Campos-Duffy | 3% |
| Maria Bartiromo | 3% |
| Karoline Leavitt | 3% |
| Jake Paul | 2% |
| Steven Cheung | 1% |
Market context
Traders on decentralised prediction markets give 50% probability to next press secretary?. 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 December 31, 2027, 11:59 PM…
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 Polymarket Scam?, 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
- How does resolution work?
- Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.
- 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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