Will the U.S. invade Iran before 2027?

Platform comparison

Market context

Polymarket prices this contract at **25% YES** today, with traders staking **USDC on Polygon** and holding the relevant **conditional tokens** until resolution. The market only pays out **Yes** if the United States **commences a military offensive intended to establish control over any portion of Iran** before the settlement cut-off, so the key question is not whether tensions rise, but whether events cross the line into an invasion-style operation under the market’s definition.

The current price sits below the levels implied by the major escalation already seen in 2026. U.S. and Israeli strikes began on **28 February 2026** under **Operation Epic Fury**, and the Department of War says the mission has focused on destroying Iranian missile systems, missile production, naval assets and other security infrastructure[7][10]. Reuters reported in March that Defence Secretary Pete Hegseth said U.S. objectives had not changed, while officials were considering additional troops and a funding request above **$200 billion** for the war effort[6]. That history matters because the market is asking about a further step: a deliberate offensive to establish control over territory, which is more extreme than air and naval strikes alone.

For traders, the most important catalysts are any shift in **U.S. force posture**, explicit White House or Pentagon language about **ground forces**, and moves that suggest planning for sustained territorial operations rather than coercive strikes. Reuters has already reported preparations for potentially weeks-long operations and the deployment of carrier, air and missile-defence assets, which keeps optionality open even if public messaging stresses limited aims[13]. Watch for congressional action, mobilisation orders, and any change in the operational tempo around the Strait of Hormuz or Iranian nuclear facilities, since those are the clearest signals that the contract could move sharply before the end-2026 expiry[5][15].

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 Kalshi 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.

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.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

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.