Prediction market prices after fees: what you really pay on Polymarket, Kalshi, Novig and OG

Most prediction markets charge a taker fee on top of the price you see. A Polymarket contract posted at 50¢ (+100) costs 51.25¢ once its fee is added, so the price you actually bet at is about −105, not +100. Show prices after fees prints every prediction market price the way you would pay it.

What is a prediction market taker fee?

A taker fee is what you pay when your order takes a price already on the book. Kalshi, Polymarket, Polymarket US, Novig and OG work it out as rate × price × (1 − price) a contract, so the fee is biggest on a 50¢ contract and shrinks toward 0¢ and $1. A resting (maker) order pays less or nothing. ProphetX charges a commission on winnings instead.

Which venues charge it, as of November 1, 2026

• Polymarket: 0.05 on most sports, up to 1.25¢ a contract; NFL and college football games 0.03, up to 0.75¢. The feed's price leaves it out.

• Polymarket US: 0.0695 on nearly every market (table tennis 0.10), up to 1.74¢ a contract. The feed's price leaves it out.

• Kalshi: 0.07, up to 1.75¢ a contract, already in the price we show.

• Novig: free on pre-game straight bets; 0.06 on live bets and futures.

• OG: 0.07, charged when you open and again on an early close.

• ProphetX: 2% of a winning bet's profit, already in the price we show.

Rates change, and some differ by sport. The prediction market fees page shows what every venue charges today, by sport and category, and it is checked every morning.

What changes with Show prices after fees on

• Polymarket, Polymarket US, OG and live Novig prices print what a taker pays after the fee, at that sport's rate. Kalshi and ProphetX already include theirs, so they don't change.

• Every tool ranks by the price you would pay: the best book and its mark, price sorts, EV, edge, implied odds, Kelly stakes and payouts on the Odds screen, +EV, Soft Lines, Arbs, Middles, Hit Rates, the cheat sheets, Games, Ladders, Sharp Intel and the bet slip.

• Links, the price a book takes, your tracked bets and fair prices stay as posted.

See a price before and after fees

Hover any prediction market price (tap it on a phone) to see it before fees, the taker fee a contract and after fees, with the one on screen marked. It works with the setting on or off, so you can compare without changing anything.

Who has it on

Accounts created from November 1, 2026 start with prices after fees. If your account is older you'll be asked once; your prices stay as posted until you choose. Change it anytime in Settings › Display or the Odds screen's View menu.

See today's prediction market fees or read how prediction market fees work.