Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Polymarket Alternative UK) Pick polygram.ink (preferred broker) |
74% | 26% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | View on Polymarket → |
Polymarket (direct) polymarket.com |
74% | 26% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | View on Polymarket → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | View on Polymarket → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | View on Polymarket → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | View on Polymarket → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| Crowley 0.4–0.6% | 74% |
| Other | 50% |
| Crowley 0.2–0.4% | 18% |
| Crowley 0.6–0.8% | 4% |
| Crowley <0.2% | 3% |
| Crowley 0.8–1% | 2% |
| Crowley 1–1.2% | 1% |
| Hong 1%+ | 0% |
| Hong 0.8–1% | 0% |
| Hong 0.6–0.8% | 0% |
| Hong 0.4–0.6% | 0% |
| Hong 0.2–0.4% | 0% |
| Hong <0.2% | 0% |
| Crowley 1.2–1.4% | 0% |
| Crowley 1.4–1.6% | 0% |
| Crowley 1.6–1.8% | 0% |
| Crowley 1.8–2% | 0% |
| Crowley 2%+ | 0% |
Market context
Wisconsin's Democratic primary for governor takes place on 11 August 2026, with the margin between the top two finishers determining settlement across 0.2 percentage-point brackets. Polymarket currently prices all brackets at 0% YES, reflecting genuine uncertainty about both the field composition and competitive dynamics at this early stage. The conditional token structure on Polygon means traders are effectively pricing the joint probability of specific margin ranges occurring, with USDC settlement dependent on official Wisconsin Elections Commission results.
Historical Democratic gubernatorial primaries in Wisconsin show variable margins. Tony Evers won the 2018 primary with roughly 45% of the vote in a four-candidate field, though that race lacked a single dominant challenger. Comparable Midwestern Democratic gubernatorial primaries—such as Michigan's 2022 race where Whitmer secured 76% against a fractured field—demonstrate how incumbent advantage or candidate consolidation can produce blowout margins. The absence of an incumbent in 2026 suggests potential for a competitive race, though early candidate announcements and fundraising patterns remain sparse as of late 2024.
Traders should monitor candidate entry announcements through spring 2026, as late entrants or withdrawals materially shift margin probabilities. Wisconsin's primary turnout patterns, typically lower than general elections, may amplify the influence of organised labour and progressive networks. Federal redistricting effects on Democratic base geography and any national party interventions in the race could reshape the competitive landscape. Local reporting from Wisconsin outlets and Democratic Party filing deadlines in early 2026 will provide concrete signals for repricing these brackets.
Methodology
This page reviews Wisconsin Governor Democratic Primary Margin of Victory (0.2% Brackets) across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Polymarket Alternative UK, which mirrors the Polymarket order book at 0% fees.
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 Polymarket Alternative 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%.
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