Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via PolyGram) Pick polygram.ink (preferred broker) |
58% | 42% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Trade this market → |
Polymarket (direct) polymarket.com |
58% | 42% | 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 |
|---|---|
| September 30? | 58% |
| August 30? | 38% |
| August 9? | 25% |
Market context
Polymarket’s **23% Yes** price suggests traders think Max Miller is more likely to stay in the OH-07 race than withdraw before the 9 August settlement cut-off, but still assign a meaningful chance that pressure forces a change. On Polymarket, that means USDC is already being priced against a withdrawal announcement or a formal suspension of his 2026 campaign on Polygon conditional tokens, so the contract is really a live read on whether his political and legal situation breaks before the deadline rather than on the general election itself.
The main historical framing is that late-cycle congressional exits are usually driven by deadlines, replacement rules and reputational pressure, not by polling alone. Miller has repeatedly said he is staying in the race, including on 4 August, while reporting this week said he would need to withdraw by 10 August for Republicans to replace him on the ballot, with Ohio officials also facing notice requirements for any substitution meeting.[3][7][13] That combination makes the market sensitive to whether public defiance holds until the filing window closes, because a withdrawal after the replacement deadline would still satisfy the market but would not let party leaders swap in another nominee.[2][13]
A trader should watch for three things: any official statement from Miller or his representatives, any emergency Republican scheduling to pick a replacement, and any fresh reporting on the ethics investigation or domestic-abuse allegations that may change party pressure.[3][7][13] Recent coverage from the New York Times said Miller was still resisting calls to step aside and was considering adding \$1 million to his campaign, while Ohio Republicans and allied conservatives publicly escalated demands for him to exit.[13] If no credible withdrawal signal lands before the deadline, the contract will likely continue to drift with the odds of a late reversal rather than the wider OH-07 general-election polling.
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
At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.
On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.
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.
- 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%.
Trade Will Max Miller drop out of the OH-07 race by 2026? on PolyGram
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