Will the U.S. invade Iran before 2027?

Platform comparison

Market context

The market is pricing a **26%** chance that the United States launches an offensive intended to take control of any part of Iran before the end of 2026. That leaves the **favourite** as No, with the yes-side still carrying non-trivial upside if the current campaign escalates from strikes and maritime pressure into a ground operation or seizure attempt.

For context, comparable cases usually hinge on whether policymakers are aiming at punishment, coercion, or occupation. Recent reporting and official releases describe U.S. action against Iran as focused on missiles, naval assets, and the Strait of Hormuz, not territorial control; the Pentagon said Operation Epic Fury is “laser-focused” on destroying Iranian offensive missiles, missile production, the navy, and other security infrastructure.[11] Reuters reported on 19 March that Defence Secretary Pete Hegseth said objectives had not changed, while also noting talk of additional troop deployments.[7] That mix argues for the underdog, because a campaign can remain intense without crossing the market’s invasion threshold.[7][11]

The catalysts worth watching are any White House or Pentagon shift from blockade-and-strike language to **ground operations**, troop reinforcement, or an explicit mission change. Reuters had already reported in February that the military was preparing for potentially weeks-long operations and had added an aircraft carrier, troops, fighters, and destroyers, which keeps escalation risk alive if naval losses, shipping disruption, or nuclear talks break down.[14] Recent reporting has also flagged possible restricted ground activity around Kharg Island and coastal areas near the Strait, which is the sort of bridge between air war and invasion that could reprice this market quickly.[9] If diplomacy gains traction, the yes case likely stays overpriced; if the administration widens objectives or commits regular infantry to hold territory, the current 26% could prove too low.[7][9]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Who Will Win, which mirrors the Polymarket order book directly.

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 Who Will Win. 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 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.