Understand what you’re trading.

Prediction market prices, sportsbook odds, trading costs, and rule-change research, together. Take a closer look before deciding.

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The price you see isn’t the whole cost.

See how fees change the breakeven point for one market.

Fee pricing uses verified terms or says why it cannot.

One market, read on Sep 22, 2026

Buying at the 32.00¢ ask and paying the taker fee puts the conservative breakeven at 34.01¢. The outcome must be at least that likely.

Open the fee screen

Bid: 31.00¢
Ask: 32.00¢

Breakeven (long)34.01¢[33.01¢, 34.01¢]Ask plus taker fee, a conservative bound

Cost to cross vs midpoint2.49¢[1.49¢, 2.49¢]Half the spread plus fee, sell at the bid

Calculation & receipt

Bid / ask: 0.3100 / 0.3200
Spread: 1.00¢
Implied p (mid): 31.5%
Breakeven (long): 34.01¢ [33.01¢, 34.01¢]
Midpoint after assumed exit fee: 29.50¢ [29.50¢, 30.50¢]
Cost to cross vs midpoint: 2.49¢ [1.49¢, 2.49¢]
Crossing: sell at the bid

Quotes from a two-sided politics contract on Polymarket US. Schedule effective Sep 17, 2026, read from the venue’s published fee page. Dated reference, not current fee authority. The fee is rounded to the nearest cent per fill.

On a market page, each figure opens its receipt: the price source and clock, the fee schedule and its effective date, the fill assumption, and the rounding rule.

Read the schedule and breakeven grid