Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via PolyGram) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Trade this market → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Trade this market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Trade this market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Trade this market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Trade this market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| Charlie Hatcher | 100% |
| Andy Ogles | 0% |
| Candidate A | 0% |
| Candidate B | 0% |
| Candidate C | 0% |
| Other | 0% |
Market context
Polymarket is effectively pricing **certainty** here: the contract is already at 100% YES, while the Republican primary for Tennessee’s 5th Congressional District has been called for Charlie Hatcher on election night. The market settles from the official Republican nomination outcome for the August 6 primary, with payout mechanics running through Polymarket’s USDC contracts on Polygon and conditional tokens rather than through the race itself in the abstract.
For context, this is not a close race by historical standards, but it was a meaningful intra-party challenge. In the previous cycle, incumbent Andy Ogles won the Republican primary for TN-05 in 2024, showing that the seat has already been contested within the party, and this year Hatcher entered as a credible challenger with outside support, including an endorsement from former U.S. Representative Zach Wamp.[9][2] Election-night reporting from the *New York Times* and NBC both show Hatcher defeating Ogles by roughly 53.2% to 46.8%, which explains why the market has moved to a full win rather than leaving residual uncertainty.[1][3]
The main trader watch-list now is procedural rather than electoral: whether there is any official Republican-source dispute, whether the nominee record is finalised cleanly, and whether any post-primary replacement language becomes relevant before the market’s resolution window closes on 6 August 2026.[11] Polymarket’s contract notes that a later nominee replacement before election day does not change settlement, so the practical focus is on the party’s official confirmation path and the absence of contradictory filings or disputes from recognised Republican sources such as the RNC.[11]
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 PolyGram, 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
- 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 PolyGram. 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%.
Trade TN-05 Republican Primary Winner on PolyGram
Live order book, 0% fees, USDC settlement in seconds.
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