Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Kalshi UK) Pick polygram.ink (preferred broker) |
62% | 38% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
62% | 38% | 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 |
|---|---|
| Lisa Demuth | 62% |
| Mike Lindell | 37% |
| Kendall Qualls | 1% |
| Scott Jensen | 0% |
| Jeff Johnson | 0% |
| Patrick Knight | 0% |
| Brad Kohler | 0% |
| Chris Madel | 0% |
| Phil Parrish | 0% |
| Kristin Robbins | 0% |
| Other | 0% |
| Candidate B | 0% |
| Candidate C | 0% |
| Candidate D | 0% |
| Candidate E | 0% |
| Candidate F | 0% |
| Candidate G | 0% |
| Candidate H | 0% |
| Candidate I | 0% |
| Candidate J | 0% |
| Candidate K | 0% |
| Candidate L | 0% |
| Candidate M | 0% |
| Candidate N | 0% |
| Candidate O | 0% |
| Candidate P | 0% |
| Candidate Q | 0% |
| Candidate R | 0% |
| Candidate S | 0% |
| Candidate T | 0% |
| Candidate U | 0% |
| Candidate V | 0% |
| Candidate W | 0% |
| Candidate X | 0% |
| Candidate Y | 0% |
| Candidate Z | 0% |
Market context
Polymarket’s **62% YES** price implies the market is leaning towards a Republican primary winner being named in Minnesota on 11 August, with the contract settling against the first official result from the Minnesota Republican Party. On Polymarket, that exposure sits in **USDC** on **Polygon**, and the payoff is determined by the matching **conditional token** outcome rather than by the broader November governor’s race.
The current read is best understood against a crowded, unusually fluid field. Minnesota Republicans are putting forward seven candidate-lieutenant governor pairs, and the race has been framed by party figures as a three-way contest between Lisa Demuth, Mike Lindell and Kendall Qualls.[2][5][13] Earlier party straw-poll data gave Demuth a clear advantage, but subsequent polling has shown Lindell and Demuth trading places near the top, with Qualls still within striking distance.[3][8][17] That kind of split front-runner structure usually keeps implied probabilities below certainty until late ballot-count signals emerge, which helps explain why the market is not pricing a near-lock.
A trader should watch for any last-minute campaign withdrawals, turnout signals from early voting, and whether the party’s endorsement dynamics translate into actual votes on Tuesday. The Minnesota Secretary of State says early voting and absentee voting run through 10 August, with primary election day on 11 August, so a meaningful share of ballots may already be in.[17] CBS News has described the Republican primary as especially competitive, with Qualls, Demuth and Lindell all still active and all seeking momentum heading into the vote.[4] If the field narrows further or a frontrunner claims a decisive lead in pre-election reporting, that would be the main catalyst for a sharp repricing before settlement.
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
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
- 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.
- 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.
- 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%.
Trade Minnesota Governor Republican Primary Winner on Kalshi UK
Live order book, 0% fees, USDC settlement in seconds.
Open live market →