Will the Iranian regime fall by September 30?

Platform comparison

Market context

The Islamic Republic of Iran faces a critical juncture as the 2026 Iran war concludes, with the United States and Israel explicitly pursuing regime change through military strikes and internal destabilisation efforts [5][6]. Despite unprecedented protests spreading across Iranian cities and a financial crisis driving inflation above 50 per cent, the current crowd-implied probability of the regime collapsing by September 30 remains at just 3 per cent [4][8]. This low figure contrasts sharply with analyst commentary suggesting Iran fulfils nearly all five essential conditions for revolution, including elite division and a persuasive opposition narrative centred on former Crown Prince Reza Pahlavi [4].

Historical precedents indicate that brittle regimes often endure despite severe economic distress unless a unified national opposition emerges with external backing [8]. The divergence between the 3 per cent prediction-market odds and the 20 per cent probability on Manifold Markets for a similar 2026 collapse scenario highlights significant cross-platform uncertainty regarding the regime’s resilience [2]. While Polymarket’s earlier contract on a fall before August resolved to “No” with 0 per cent probability, the current window extends into late September, allowing time for post-war instability to crystallise [3].

Traders should monitor announcements regarding the dissolution of core institutions such as the Supreme Leader’s office or IRGC control under clerical authority, which are mandatory for a “Yes” resolution [2]. Key catalysts include the implementation of post-war sanctions, the status of the 12-day war’s disastrous outcomes, and any coordinated actions by the US and Israel to bring an opposition-friendly government to power [4][5]. The severity of the economic collapse and the loss of sovereign authority over the majority of the population will serve as definitive indicators of regime failure [4].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Will the Iranian regime fall by September 30? 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

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 Best Prediction Markets 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 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?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

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.