Will the Iranian regime fall by September 30?

Platform comparison

Market context

The Iranian regime's collapse within 18 months would require the dissolution or incapacitation of the Supreme Leader's office, the Guardian Council, and IRGC control structures that currently enforce clerical authority across the state. The 2% implied probability reflects the regime's demonstrated capacity to absorb domestic unrest—including the 2009 Green Movement, the 2017–2018 protests, and the 2022 Mahsa Amini uprising—whilst maintaining institutional coherence and security apparatus loyalty. Regime change in Iran has not occurred since 1979, and the current power structure has weathered multiple generational challenges to its legitimacy without fundamental fracture.

Historical precedent suggests the bar for regime collapse is exceptionally high. The Shah's fall in 1979 required sustained, multi-sector mobilisation across urban and rural populations, military defection, and clerical leadership of an alternative vision. By contrast, recent Iranian protest cycles have lacked either unified institutional alternatives or sufficient military-security defection to threaten core state functions. Comparable regional cases—Syria's civil war, Iraq's state collapse—involved external military intervention or sectarian fragmentation absent in Iran's more cohesive structure.

Near-term catalysts centre on economic deterioration, sanctions escalation, and potential military confrontation. The IRGC's expanded economic footprint and recent ballistic missile tests signal preparedness for external pressure. Any significant shift would likely require either cascading security force defections, a major external shock, or simultaneous economic collapse and mass mobilisation—none currently materialising. The consensus at 2% reflects these structural barriers; value arguments for higher probability rest on tail-risk scenarios involving geopolitical shock or unforeseen institutional fracture.

Methodology

This page reviews Will the Iranian regime fall by September 30? 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 Who Will Win, which mirrors the Polymarket order book at 0% fees.

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.

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