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How Polymarket Markets Resolve

Guide · source: Polymarket documentation · checked September 23, 2026

Polymarket markets resolve through UMA's optimistic oracle. After the event, anyone can propose the result by posting a bond (typically $750). If nobody disputes it within two hours, the market resolves. A first dispute starts a new proposal round; a second dispute sends the question to a UMA token-holder vote that takes about 48 hours. Undisputed markets settle about two hours after the proposal; disputed ones take roughly four to six days.

The resolution process step by step

Step	What happens	How long
1. Proposal	Anyone selects the outcome and posts a bond (typically $750).	After the event ends
2. Challenge window	Anyone can dispute by posting a matching bond.	2 hours
3a. No dispute	The proposal stands and the market resolves; winning shares redeem for $1.	~2 hours after the proposal
3b. First dispute	A new proposal round begins.	Another 2-hour window
4. Second dispute	The question goes to UMA's Data Verification Mechanism: UMA token holders vote.	About 48 hours

Summary of Polymarket's resolution documentation. Disputed markets take about 4–6 days in total.

Clarifications

When a question turns out to be ambiguous, Polymarket can add “additional context”. It is published on-chain through a bulletin-board contract, cannot change the fundamental intent of the question, and UMA voters are expected to take it into account in a dispute.

What this means for traders

📜 Read the rules, not just the title. The rules text and resolution source decide the outcome; every page on Polymarket odds today summarises them under “How this market resolves”.
⏱️ The end date is not the payout date. Winning shares pay after resolution — at least two hours after a proposal, days if it is disputed.
⚖️ Late-market prices carry resolution risk. A 99¢ price on an event that already happened reflects the chance of a dispute or a surprise reading of the rules.
🔁 Compare venues with care. The same question on another exchange can resolve on different rules — see Polymarket vs Kalshi.

Frequently asked questions

How does Polymarket decide the outcome of a market?

Through UMA's optimistic oracle: anyone proposes the result with a bond, and if nobody disputes it within two hours the market resolves. Disputes lead to a new proposal round and, if disputed again, a UMA token-holder vote.

How long does Polymarket take to pay out?

About two hours after an undisputed proposal. Disputed markets take roughly four to six days because of the extra proposal round and the roughly 48-hour UMA vote.

Can Polymarket change the rules of a market?

Polymarket can publish additional context to clarify an ambiguous question, but its documentation says a clarification cannot change the question's fundamental intent.

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