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Capitalized terms not defined within this Trading Fee Schedule have the meaning set forth in the Polymarket US Rules.

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Trading Fees

RateApplies To
Taker Fee30 bps (0.30%)Aggressive orders that immediately match against resting orders
Maker Rebate20 bps (0.20%)Resting orders that provide liquidity and get filled

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Formula

Fee or Rebate = Fee Notional × Rate
Where:
  • Buyers: Fee Notional = Number of Contracts × Contract Price
  • Sellers: Fee Notional = Number of Contracts × (1 - Contract Price)
For sellers, the fee is based on the complement of the contract price (i.e., the risk notional), not the trade price.

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Examples

Example 1: Purchase 1,000 Contracts at $0.65 per Contract (taker)
  • Fee Notional: 1,000 × $0.65 = $650.00
  • Taker Fee: $650.00 × 0.0030 = $1.95
Example 2: Sell 1,000 Contracts at $0.65 per Contract (maker)
  • Fee Notional: 1,000 × (1 - $0.65) = 1,000 × $0.35 = $350.00
  • Maker Rebate: $350.00 × 0.0020 = $0.70
Example 3: Sell 10 Contracts at $0.90 per Contract (taker)
  • Fee Notional: 10 × (1 - $0.90) = 10 × $0.10 = $1.00
  • Taker Fee: $1.00 × 0.0030 = $0.003 → rounds to $0.00

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Fee Rules

  • All fees and rebates are rounded to the nearest $0.01 using banker’s rounding (round half to even). When the computed fee or rebate falls exactly on a half-cent (e.g., $0.025), the amount is rounded to the nearest even cent (e.g., $0.025 rounds to $0.02, while $0.035 rounds to $0.04).
  • There is no minimum fee. For small trades, banker’s rounding may result in a fee of $0.00.