Every Polymarket market ends with resolution: deciding which outcome happened. Polymarket uses the UMA optimistic oracle for most markets.
How the UMA Oracle Works
- After the event, someone proposes an outcome and posts a bond.
- A challenge window opens (often around two hours) [verify before publishing].
- If nobody disputes, the proposal is accepted and the market resolves.
- If someone disputes, UMA token holders vote on the correct answer.
The "optimistic" part means answers are assumed correct unless challenged — cheap and fast when things are clear.
Polymarket Resolution Disputes
Disputes usually happen when the rules are ambiguous. Voters follow the market's written rules and resolution source, not what "feels" right. Disputes can delay payouts by days. Read more on the dispute process.
How Polymarket Pays Out
Once resolved, each winning share is worth $1.00 and each losing share $0. You redeem winning shares to turn them into USDC in your balance. Before resolution you can also merge a YES and a NO share of the same market back into $1.00, or sell your shares at the market price.
How Long Does Polymarket Take to Pay Out?
Payout happens soon after resolution, which depends on the event end date, the challenge window and any disputes. Then withdrawals have their own timing.
Tips
- Always read the full rules before trading.
- Check the resolution source and date.
- Remember that ambiguous questions carry extra risk.