Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Is Kalshi Legal in California) Pick polygram.ink (preferred broker) |
27% | 73% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Go to the live market → |
Polymarket (direct) polymarket.com |
27% | 73% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Go to the live market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Go to the live market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Go to the live market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Go to the live market → |
Market context
Iran would need to make a public commitment to end uranium enrichment entirely by 31 December 2026 for this market to settle Yes; a narrower cap, a temporary pause, or an offer that leaves enrichment in place would not be enough under the stated rules. That distinction matters because past Iran nuclear understandings have usually limited enrichment levels, stockpiles, centrifuges, or sites rather than eliminating enrichment altogether, as in the JCPOA framework and related summaries from the White House and CRS.[4][10][13]
The 27% implied probability is higher than a pure long-shot, but it still sits against a long record of Iranian nuclear brinkmanship and partial compliance, not a clean precedent for total cessation. Iran previously breached the 3.67% ceiling in 2019 and, according to arms-control sources, later moved well beyond the JCPOA’s limits; more recent reporting says the IAEA found Iran holding over 400 kg of uranium enriched to 60% in a confidential May 2025 report.[8][5] A recent Reuters-style diplomatic readout would be especially important here, but the most directly relevant fresh signal in the supplied results is a report that US officials said Iran had agreed *in principle* to dispose of its enriched uranium stockpile, while the IAEA had not verified any agreement.[3]
For market-access context, German GlüStV rules can affect whether a site is treated as a permitted betting product in Germany, while US CFTC reach is relevant if the contract is viewed as a derivatives-style event market offered to US persons. “No-KYC up to $1,500” generally means a user can access small stakes without identity verification, which lowers friction but does not remove jurisdictional or product-type restrictions; for a geopolitics market tied to a high-salience sovereign event, the main tradeable catalysts remain any formal US-Iran statement, IAEA language, or an explicit Iranian pledge before year-end.
Methodology
This overview of Iran agrees to end enrichment of uranium by December 31? reviews the four comparable platforms from a regulatory perspective: which is accessible in your jurisdiction, where KYC kicks in, how the platform is classified by your country of residence. Live probability is the Polymarket mid; comparison columns show regulatory status, KYC thresholds and settlement options for each platform.
Resolution & payout
On Polymarket, resolution runs on-chain via UMA Optimistic Oracle. USDC payout is instant and automatic, with no KYC. Tax treatment depends on your jurisdiction — in the US, gains are usually ordinary income; in the UK, often capital gains. Consult a tax professional for your situation.
FAQ
- Is Polymarket legal in my country?
- Polymarket is geo-blocked in the US/UK/EU. Actual usage via the Polymarket interface is not possible there. The legal status itself varies — many countries treat prediction markets as a gray area. Is Kalshi Legal in California has a different geo footprint.
- How are winnings taxed?
- Tax treatment varies by jurisdiction. In most countries, prediction market gains are treated as ordinary income or capital gains. We cannot provide tax advice — consult a tax professional for your specific situation.
- What happens during a tax audit?
- You're responsible for documenting your trades. Is Kalshi Legal in California exports a full transaction history (CSV/PDF) for tax reporting. In an audit you'll need to present these documents.
- Are prediction markets gambling?
- Legally unclear in most jurisdictions. Some interpretations classify them as wagering (gambling regulation applies), others as derivatives (financial regulation applies). There's no global precedent specifically for on-chain prediction markets.
- What if regulation changes?
- If regulation changes in your jurisdiction (e.g. prediction markets are banned), Is Kalshi Legal in California would geo-block the affected region and continue processing withdrawals. Your funds remain withdrawable at any time.
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