Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via BTC Prediction) Pick polygram.ink (preferred broker) |
50% | 50% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open live market → |
Polymarket (direct) polymarket.com |
50% | 50% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Open live market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Open live market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Open live market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Open live market → |
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% |
| Tricia McLaughlin | 16% |
| Scott Jennings | 16% |
| Kaelan Dorr | 12% |
| Kush Desai | 11% |
| Harrison Fields | 11% |
| Spencer Pratt | 10% |
| Anna Kelly | 9% |
| Monica Crowley | 6% |
| Alina Habba | 6% |
| Laura Loomer | 6% |
| Taylor Rogers | 5% |
| Hogan Gidley | 5% |
| Kayleigh McEnany | 5% |
| Natalie Harp | 5% |
| Lauren Bis | 4% |
| Lara Trump | 4% |
| Beni Rae Harmony | 4% |
| Katie Pavlich | 3% |
| Ari Fleischer | 3% |
| Katie Miller | 3% |
| Maria Bartiromo | 3% |
| Elizabeth Pipko | 3% |
| Karoline Leavitt | 3% |
| Margo Martin | 2% |
| Liz Huston | 2% |
| Kari Lake | 2% |
| Rachel Campos-Duffy | 2% |
| Pat Adams | 1% |
| Matthew Boyle | 1% |
| Steven Cheung | 1% |
| Jake Paul | 1% |
Market context
Live Polymarket data shows 50% YES probability for 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
Methodologically this overview focuses on on-chain pricing: Polymarket's live mid comes from the Polygon conditional-token order book and settles automatically in USDC. The other three venues — Kalshi, Betfair, Manifold — sit alongside as off-chain reference points so you can see how the contract translates across regulatory and settlement regimes.
Resolution & payout
Settlement is on-chain via UMA Optimistic Oracle. A proposer posts the outcome with a bond, a two-hour dispute window opens, then the smart contract lifts winning conditional tokens to 1 USDC and sends payments to holders' wallets automatically. No withdrawal fees beyond Polygon gas.
Off-chain venues (Kalshi, Betfair, Smarkets) settle in local fiat through bank-side clearing — faster than SWIFT, slower than on-chain. Manifold pays no real cash.
UK Frequently Asked Questions
- What are crypto prediction markets?
- Crypto prediction markets are on-chain smart contracts where you buy YES or NO shares on a future crypto event (e.g. "BTC above $100k by year-end"). The market price between 0¢ and 100¢ is the implied probability.
- What does a transaction cost on Polygon?
- Polygon gas is typically under $0.01 per transaction. A full trade cycle (Approve + Order + Fill) totals around $0.03 — compared to $5-50 on Ethereum mainnet.
- 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%.
%22%2F%3E%3Cpath%20d%3D%22M%206%2066%20A%2026%2026%200%200%201%2058%2066%22%20fill%3D%22%23E6B98D%22%20opacity%3D%220.9%22%2F%3E%3Ccircle%20cx%3D%2232%22%20cy%3D%2226%22%20r%3D%2222%22%20fill%3D%22%23F5CBA7%22%2F%3E%3Cpath%20d%3D%22M%2010%2026%20A%2022%2028%200%200%201%2054%2026%22%20fill%3D%22%23fbbf24%22%20opacity%3D%220.9%22%2F%3E%3C%2Fsvg%3E){kind=small}
and%22%2F%3E%3Cpath%20d%3D%22M%206%2066%20A%2026%2026%200%200%201%2058%2066%22%20fill%3D%22%23E6B98D%22%20opacity%3D%220.9%22%2F%3E%3Ccircle%20cx%3D%2232%22%20cy%3D%2226%22%20r%3D%2222%22%20fill%3D%22%23F5CBA7%22%2F%3E%3Cpath%20d%3D%22M%2010%2018%20Q%2016%204%2026%2010%20Q%2020%202%2032%206%20Q%2044%202%2038%2010%20Q%2048%204%2054%2018%22%20stroke%3D%22%23fbbf24%22%20stroke-width%3D%224%22%20fill%3D%22none%22%20stroke-linecap%3D%22round%22%2F%3E%3C%2Fsvg%3E){kind=small}
Trade Next Press Secretary? on BTC Prediction
Live order book, 0% fees, USDC settlement in seconds.
Open live market →