Fee
Last reviewed 2026-08-07
Fee — definition
The platform's cut on a trade, withdrawal, or settlement. Eats into edge — calculate before sizing positions.
Kalshi charges a maker/taker fee scaled to price and volume. Polymarket charges no trading fee but you pay gas on deposits and withdrawals.
Always model fees plus spread before claiming a positive expected value on a trade.
Learn more: Kalshi fees explained: maker, taker, and withdrawals
See also
Frequently asked questions
What does fee mean in prediction markets?
The platform's cut on a trade, withdrawal, or settlement. Eats into edge — calculate before sizing positions.
How does fee work in practice?
Kalshi charges a maker/taker fee scaled to price and volume. Polymarket charges no trading fee but you pay gas on deposits and withdrawals.
Sources & further reading
- CFTC — Event contracts explainedU.S. Commodity Futures Trading Commission
- Kalshi — how prices and settlement workKalshi
- UMA Optimistic Oracle documentationUMA Protocol
Last reviewed 2026-08-07 · CollegePredictionMarkets.com