Will the Iranian regime fall by September 30?

Platform comparison

Market context

The real-world event at hand is whether the Islamic Republic of Iran’s current ruling regime will be overthrown, collapse, or cease to govern by September 30, 2026. Current crowd-implied probability on this contract sits at just 2% YES, a figure that diverges meaningfully from the 6% chance offered on Manifold Markets for a similar resolution by December 31, 2026[1]. This gap also contrasts with Polymarket’s earlier 16% estimate for regime change by year-end, which subsequently fell to 16% after protests intensified but failed to fracture the security apparatus[2]. Analyst consensus, including Iran expert Hamidreza Azizi, holds that without unified opposition leadership, current unrest poses no greater threat than prior waves, despite eroding legitimacy[2].

Historically, regimes described as fierce but brittle—such as those in Syria or North Korea—have persisted for decades absent a national opposition with external backing[7]. Comparable cases in the 2026 Iran war show that even sustained U.S. and Israeli military strikes, leadership assassinations, and efforts to incite internal uprising have not triggered large-scale revolts[3]. The Economist notes that despite horizontal escalation of strikes, there is no substantial weakening or dissolution of Iran’s security apparatus, reinforcing the view that regime collapse remains a low-probability outcome[4].

Traders should monitor official announcements regarding the Supreme Leader’s health, Guardian Council decisions, and IRGC cohesion under clerical authority, as these are core indicators of regime stability[1]. Recent protests initiated by shopkeepers in Tehran and spreading to other cities have prompted President Masoud Pezeshkian to call for dialogue, yet the security establishment remains largely unified[2]. Key dependencies include the outcome of renewed conflict risks, the impact of escalating U.S. sanctions, and whether any credible opposition leadership emerges to rally dissent[2]. Any shift in these factors would materially alter the implied probability of collapse.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

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.

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like PolyGram trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

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.