By SharkBetting Editorial, Prediction Market Analyst.
Key Takeaways
- Polymarket fee formula: shares x feeRate x probability x (1 minus probability)
- Sports: 5% | Finance/Politics/Mentions/Tech: 4% | Economics/Culture/Weather/Other: 5% | Crypto: 7.0% | Geopolitics: FREE
- Fees are highest at 50% probability and lowest at extremes
- Makers (limit orders) pay zero fees and earn daily USDC rebates
- No Polymarket fee to deposit or withdraw USDC, but intermediaries may charge
- SharkBetX: 3% on net winnings only. Losing trades cost nothing in fees.
What Are Polymarket Trading Fees?
Polymarket charges a taker fee on most prediction markets. When you place a market order that fills immediately, you are the taker and pay the fee. The fee funds the Maker Rebates Program, distributing daily USDC rewards to traders who post limit orders.
The core rule: takers pay, makers earn. Click "Buy Yes" at the current price and you are a taker. Post a limit order that someone else fills later and you are a maker who earns rebates instead.
For a fundamentally different cost structure, SharkBetX is an official Polymarket Builder charging 3% on net winnings only. Losing trades cost nothing in fees.
How the Polymarket Fee Formula Works
fee = shares x feeRate x probability x (1 minus probability)
In plain English: The fee is biggest when the market is truly 50/50 and smallest when one side is a heavy favourite or longshot. Polymarket charges proportionally more for uncertain bets.
Why? The probability x (1 minus probability) term peaks at 0.25 when probability is 50% and falls toward zero at extremes.
Worked example: You think Chelsea will win the Champions League
You buy 100 shares at 30% probability. Cost: $30. If Chelsea wins, you get $100 back.
Polymarket fee: 100 x 5% x 0.30 x 0.70 = $1.05, paid now win or lose.
With SharkBetX: $0 fee if Chelsea loses. 3% of the $70 net winnings = $2.10 only if they win.
Polymarket Fee Schedule by Category
| Category | Taker Fee | Maker Rebate |
|---|---|---|
| Sports | 5.0% | 15% back to makers |
| Finance | 4.0% | 25% back to makers |
| Politics | 4.0% | 25% back to makers |
| Mentions | 4.0% | 25% back to makers |
| Tech | 4.0% | 25% back to makers |
| Economics / Culture / Weather / Other | 5.0% | 25% back to makers |
| Crypto | 7.0% | 20% back to makers |
| Geopolitics | FREE | N/A |
Source: docs.polymarket.com/trading/fees. Rates and rebates reverified July 25, 2026; sports corrected to 5% with a 15% maker rebate.
Does Polymarket Charge Fees on Winnings?
No. The taker fee is charged at trade time regardless of outcome. When a market resolves YES, you receive the full $1.00 per share with no further fee deducted.
SharkBetX takes this further: zero fees on losing trades. Only 3% of net winnings is charged. Make 10 trades and 6 lose: you pay fees on 4 trades with SharkBetX versus 10 with native Polymarket.
Polymarket vs SharkBetX Fees
| Platform | When charged | Rate | Fee on losing trade |
|---|---|---|---|
| Polymarket (native) | At trade time | 4-7.0% | Yes |
| SharkBetX | On net winnings | 3% flat | No |
Frequently Asked Questions
How much does Polymarket charge per trade?
It depends on category and probability. Sports: 5%, Crypto: 7.0%, Finance/Politics/Mentions/Tech: 4%, Economics/Culture/Weather/Other: 5%. Fees peak at 50% probability.
Does Polymarket charge a fee on winnings?
No. The taker fee is charged at trade time regardless of outcome. You receive the full $1.00 per share if you win, with no additional settlement fee.
What is the Polymarket sports betting fee?
Sports markets use a 5.0% taker fee rate. For 100 shares at 50% probability that produces a $1.25 fee, paid at trade time win or lose.
Does Polymarket have deposit or withdrawal fees?
Polymarket does not charge a fee to deposit or withdraw USDC, but intermediaries such as payment providers may charge their own fees.
What is the difference between maker and taker fees on Polymarket?
Takers fill existing orders immediately and pay the fee. Makers post limit orders that others fill later, paying zero fees and earning daily USDC rebates of 15-25% of collected taker fees.
Is there a way to pay less in Polymarket fees?
SharkBetX is an official Polymarket Builder charging 3% on net winnings only. Losing trades cost nothing in fees. Access Polymarket order-book liquidity in supported sports markets across 20+ leagues.
SharkBetting Editorial Team, Prediction Market Analysts.
Source: docs.polymarket.com/trading/fees, checked July 25, 2026.