For the complete documentation index, see llms.txt. This page is also available as Markdown.
Fees
Fees
Probable charges trading fees to keep markets liquid, fair, and reliable — especially when prices are uncertain. Fees are not just a cost; they help balance the market, reduce noise, and reward traders who act with conviction.
Key Notes
Only takers pay fees. Makers trade free. Providing liquidity on Probable is completely fee-free.
Taker fees range from 0.01% up to 1.75%, depending on market price
Fees are highest when market trades at 50% probability
Fees decrease as the price moves toward 0% probability and 100% probability
How to check my fees?
Your estimated fee is shown directly in the order preview before you confirm a trade.
Fees update in real time based on price and order type.
Price Curve
Trades at extreme probabilities (near 0% or 100%): Lower fees due to reduced uncertainty
Trades at equilibrium (50% probability): Higher fees reflecting maximum uncertainty and peak activity
Settlement & Gas
All fees are either charged in the settlement asset (e.g. USDT) or the CTF token of the market
Probable covers gas costs for trade execution and settlement
