Will the U.S. invade Iran before 2027?

Platform comparison

Market context

The live probability on this contract is **17% YES**, which sits below the level implied by recent U.S. military activity around Iran but above a pure ceasefire-style reading of the current situation. On the market’s wording, a YES requires the United States to *commence a military offensive intended to establish control over any portion of Iran* by 31 December 2026, a higher bar than airstrikes or maritime interdiction and closer to an invasion or occupation trigger.

Historically, traders should treat that distinction as important. The U.S. has already conducted large-scale strikes against Iran this year: the Department of War says Operation Epic Fury began on 28 February 2026 and focused on destroying missile, navy and security infrastructure[14], while Reuters reported in March that Defence Secretary Pete Hegseth said U.S. objectives remained limited to degrading missile launch systems, defence manufacturing and naval forces[10]. Reuters also reported in February and April that the Pentagon had built up forces for potentially weeks-long operations and was ready to resume fighting if diplomacy failed[13][12]. Even so, those reports describe sustained air and naval campaigning, not an explicit move to seize territory, which helps explain why the market price remains well below levels usually associated with a ground-war scenario.

For catalysts, traders should watch any shift from strike planning to troop deployment, especially orders involving amphibious or land units, because CNN reported on 3 August that the military was preparing possible new strikes on Iranian sites and that CENTCOM had considered one- to two-week bombardment options[15]. The same reporting said the White House was weighing whether to intensify the campaign, while Reuters had earlier noted talk of additional troops and possible measures to secure the Strait of Hormuz[10]. The main cross-platform divergence is likely to remain between prediction-market pricing, which still discounts an actual invasion, and analyst or newsflow commentary, which is more focused on escalation risk and renewed strikes than on territorial control.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Will the U.S. invade Iran before 2027? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Best Prediction Markets, which mirrors the Polymarket order book at 0% fees.

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 Best Prediction Markets. 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 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 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 fast are USDC deposits?

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