Will the U.S. invade Iran before 2027?

Platform comparison

Market context

The United States and Israel launched a massive joint military offensive against Iran on 28 February 2026, codenamed Operation Epic Fury, targeting ballistic missiles, air defence systems and leadership facilities across the country[1][4]. This campaign, which resulted in the assassination of Supreme Leader Ali Khamenei and thousands of deaths, concluded with a ceasefire agreement on 14 June 2026 after three months of war[1][6]. The current 12% crowd-implied probability for a US invasion before 2027 reflects the fact that while major offensive action has already occurred, the specific market condition—commencing an offensive intended to establish control over any portion of Iran—was not fully met by the February strikes, which aimed at regime change and destruction of capabilities rather than territorial occupation[1][3].

Historically, US-Iran tensions have rarely escalated to direct territorial invasion, with past conflicts such as the 1988 destruction of Iranian oil platforms in the Strait of Hormuz remaining limited to retaliatory strikes rather than occupation[2]. The 2026 war followed a similar pattern: overwhelming force without land de facto control, as the ceasefire memorandum deferred final settlement on Iran’s nuclear programme and proxy activities to a sixty-day negotiation period[1][6]. This precedent suggests that while the US remains willing to use large-scale military power, establishing sovereign control over Iranian territory remains a distinct and less probable escalation compared to the strikes already witnessed.

Traders should monitor announcements regarding the status of the June 2026 ceasefire, particularly any breakdown in the sixty-day follow-on negotiations mediated by Pakistan and Qatar[1]. Key catalysts include US Central Command reports on Iranian aggression, such as attacks on commercial vessels or military installations, which have previously triggered “self-defense” strikes[6]. Recent reporting confirms Iran launched retaliatory missile and drone strikes on US embassies and oil infrastructure following the February offensive, indicating ongoing volatility that could influence future military decisions[4]. Any formal US declaration of renewed offensive intent to occupy Iranian land would be the definitive signal for a YES outcome.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Will the U.S. invade Iran before 2027? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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.

FAQ

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 Prediction Market 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.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Prediction Market UK trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.