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Every trade on Polymarket US involves two sides: the taker (the order that matched aggressively) and the maker (the resting order that provided liquidity). Takers pay a fee. Makers receive a rebate - money back, not a charge.
RoleHow you get itRate
TakerYour market order fills immediately at the best available price0.30% fee charged
MakerYour resting limit order sits on the book and gets filled0.20% rebate paid to you

How the fee is calculated

Fee notional is the dollar value the fee is applied to - for buyers it’s what you spend, for sellers it’s what you stand to lose.
  • Buyers: Fee Notional = Contracts × Price
  • Sellers: Fee Notional = Contracts × (1 − Price)
For sellers, the fee is based on the risk side of the trade (what you could lose), not the proceeds you receive.
Fee or Rebate = Fee Notional × Rate
Fees and rebates are rounded to the nearest $0.01 using banker’s rounding. There is no minimum fee - small trades may round to $0.00.

Examples

Example 1: Buy 100 contracts at $0.10 - cheap contract

Buying a long shot. The buyer’s fee notional is based on what they spend. The seller on the other side has risk of $0.90 per contract.
  • Buyer (taker): Fee Notional = 100 × $0.10 = $10.00 → Taker Fee: $10.00 × 0.0030 = −$0.03
  • Seller (maker): Fee Notional = 100 × $0.90 = $90.00 → Maker Rebate: $90.00 × 0.0020 = +$0.18

Example 2: Buy 1,000 contracts at $0.65 - mid-price

A typical trade at a mid-range price.
  • Buyer (taker): Fee Notional = 1,000 × $0.65 = $650.00 → Taker Fee: $650.00 × 0.0030 = −$1.95
  • Seller (maker): Fee Notional = 1,000 × $0.35 = $350.00 → Maker Rebate: $350.00 × 0.0020 = +$0.70

Example 3: Sell 500 contracts at $0.30 - low-price sell

The seller’s risk is $0.70 per contract. The buyer on the other side spends $0.30 per contract.
  • Seller (taker): Fee Notional = 500 × $0.70 = $350.00 → Taker Fee: $350.00 × 0.0030 = −$1.05
  • Buyer (maker): Fee Notional = 500 × $0.30 = $150.00 → Maker Rebate: $150.00 × 0.0020 = +$0.30

Example 4: Sell 10 contracts at $0.90 - near-certain outcome

When the price is close to $1.00, the seller’s risk is tiny. Both sides’ fees are minimal.
  • Seller (taker): Fee Notional = 10 × $0.10 = $1.00 → Taker Fee: $1.00 × 0.0030 = $0.003 → rounds to $0.00
  • Buyer (maker): Fee Notional = 10 × $0.90 = $9.00 → Maker Rebate: $9.00 × 0.0020 = +$0.02

Example 5: Buy 50 contracts at $0.50 - coin flip market

A 50/50 market. Both sides have equal fee notional since price and risk are the same.
  • Buyer (taker): Fee Notional = 50 × $0.50 = $25.00 → Taker Fee: $25.00 × 0.0030 = −$0.08
  • Seller (maker): Fee Notional = 50 × $0.50 = $25.00 → Maker Rebate: $25.00 × 0.0020 = +$0.05

FAQ

Are fees deducted from my balance automatically?

Yes. Taker fees are deducted from your balance at the time of the trade. Maker rebates are credited to your balance at the time of the fill. You don’t need to do anything - it’s handled by the exchange.

Can fees ever be zero?

Yes. Fees are rounded to the nearest cent. On small trades (low quantity or prices near $0.00 or $1.00), the fee can round down to $0.00. There is no minimum fee.

Do I pay fees when my order is canceled or expires?

No. Fees are only charged when a trade executes. If your order is canceled, expires, or is rejected, no fee is charged.

What is banker’s rounding?

Fees are rounded to the nearest cent using banker’s rounding (round half to even). For example, $0.025 rounds to $0.02 (down to even), while $0.035 rounds to $0.04 (up to even).
Capitalized terms not defined within this Trading Fee Schedule have the meaning set forth in the Polymarket US Rules.