Will the U.S. invade Iran before 2027?

Platform comparison

Market context

The event to watch is whether U.S. forces move from strikes and coercive pressure into an operation intended to **establish control over Iranian territory** before the end of 2026. Under the market rules, routine air or naval attacks are not enough on their own; the trigger is a military offensive aimed at holding part of Iran, which is a much higher bar than blockade, stand-off bombardment, or limited raids. [4][15][17]

That distinction matters because the recent record points to a pattern of escalation without a clear occupation objective. The U.S. has already conducted large-scale operations against Iran this year, including joint strikes with Israel and a subsequent campaign around the Strait of Hormuz, while officials have also signalled that negotiations and force posture adjustments remain in play. Reuters reported in March that the administration was weighing reinforcements and even possible ground deployments for specific tasks such as securing shipping lanes or Kharg Island, but those options were framed as limited objectives rather than a full invasion. [3][15][17]

For a programmatic trader, the key inputs are the public action stream: White House briefings, Pentagon scheduling, carrier and Marine movements, congressional authorisations, and any order that changes the mission from air/sea denial to territorial control. The U.S. National Defence Strategy still emphasises homeland defence, deterrence, burden-sharing, and industrial capacity rather than a standing invasion posture, so a sharp change in language or force composition would be the main catalyst to flag in automation. [2][7][10]

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

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.

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 Polymarket Bot UK. 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.

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 Polymarket Bot 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.