Skip to main content
Polymarket has enabled taker fees on 15-minute crypto markets, 5-minute crypto markets, NCAAB (college basketball), and Serie A markets. These fees fund a Maker Rebates program that pays daily USDC rebates to liquidity providers.
Starting Wednesday, February 18th, 2026 at midnight (UTC), taker fees and maker rebates will apply to all new NCAAB and Serie A markets created after that time. Existing markets are not affected. The first payout will be on February 19th at midnight (UTC).

​
Fee Handling by Implementation Type

The official CLOB clients automatically handle fees for you

TypeScript Client

npm install @polymarket/clob-client@latest

Python Client

pip install —upgrade py-clob-client

Rust Client

cargo add polymarket-client-sdk
What the client does automatically:
  1. Fetches the fee rate for the market’s token ID
  2. Includes feeRateBps in the order structure
  3. Signs the order with the fee rate included
You don’t need to do anything extra. Your orders will work on fee-enabled markets.

​
Option 2: REST API / Custom Implementations

If you’re calling the REST API directly or building your own order signing, you must manually include the fee rate in your signed order payload.

​
Step 1: Fetch the Fee Rate

Query the fee rate for the token ID before creating your order: 
GET https://clob.polymarket.com/fee-rate?token_id={token_id}
Response: 
{
  "fee_rate_bps": 1000
}
  • Fee-enabled markets return a value like 1000
  • Fee-free markets return 0

​
Step 2: Include in Your Signed Order

Add the feeRateBps field to your order object. This value is part of the signed payload, the CLOB validates your signature against it. 
{
  "salt": "12345",
  "maker": "0x...",
  "signer": "0x...",
  "taker": "0x...",
  "tokenId": "71321045679252212594626385532706912750332728571942532289631379312455583992563",
  "makerAmount": "50000000",
  "takerAmount": "100000000",
  "expiration": "0",
  "nonce": "0",
  "feeRateBps": "1000",
  "side": "0",
  "signatureType": 2,
  "signature": "0x..."
}

​
Step 3: Sign and Submit

  1. Include feeRateBps in the order object before signing
  2. Sign the complete order
  3. POST to /order endpoint
Important: Always fetch fee_rate_bps dynamically, do not hardcode. The fee rate varies by market type and may change over time. You only need to pass feeRateBps
See the Create Order documentation for full signing details.

​
Fee Behavior

Fees are calculated using the following formula: 
fee = C × p × feeRate × (p × (1 - p))^exponent
Where C = number of shares traded and p = price of the shares. The fee parameters differ by market type:
ParameterSports (NCAAB, Serie A)5-Min & 15-Min Crypto
Fee Rate0.01750.25
Exponent12
Maker Rebate %25%20%
Taker fees are calculated in USDC and vary based on the share price. However, fees are collected in shares on buy orders and USDC on sell orders. The effective rate peaks at 50% probability and decreases symmetrically toward the extremes. Fee Curves

​
Fee Table (100 shares)

PriceTrade ValueFee (USDC)Effective Rate
$0.01$1$0.000.00%
$0.05$5$0.0030.06%
$0.10$10$0.020.20%
$0.15$15$0.060.41%
$0.20$20$0.130.64%
$0.25$25$0.220.88%
$0.30$30$0.331.10%
$0.35$35$0.451.29%
$0.40$40$0.581.44%
$0.45$45$0.691.53%
$0.50$50$0.781.56%
$0.55$55$0.841.53%
$0.60$60$0.861.44%
$0.65$65$0.841.29%
$0.70$70$0.771.10%
$0.75$75$0.660.88%
$0.80$80$0.510.64%
$0.85$85$0.350.41%
$0.90$90$0.180.20%
$0.95$95$0.050.06%
$0.99$99$0.000.00%
The maximum effective fee rate is 1.56% at 50% probability. Fees decrease symmetrically toward both extremes.

​
Maker Rebates

Your rebate for each market: 
fee_equivalent = C × p × feeRate × (p × (1 - p))^exponent
rebate = (your_fee_equivalent / total_fee_equivalent) * rebate_pool

​
How Rebates Work

  • Eligibility: Your orders must add liquidity (maker orders) and get filled
  • Calculation: Proportional to your share of executed maker volume in each eligible market. Totals are calculated per market, so you only compete with other makers in the same market
  • Fee collection: Fees are calculated in USDC but collected in shares on buy orders and USDC on sell orders
  • Payment: Daily in USDC, paid directly to your wallet

​
Rebate Pool

Each market’s rebate pool is funded by taker fees collected in that market. The payout percentage is subject to change:
Market TypePeriodMaker RebateDistribution Method
15-Min CryptoJan 19, 2026+20%Fee-curve weighted
5-Min CryptoFeb 12, 2026+20%Fee-curve weighted
Sports (NCAAB, Serie A)Feb 18, 2026+25%Fee-curve weighted
The rebate percentage is at the sole discretion of Polymarket and may change over time.

​
Which Markets Have Fees?

The following market types have fees enabled:
  • 15-minute crypto markets
  • 5-minute crypto markets
  • NCAAB (college basketball) markets (starting February 18, 2026 for new markets)
  • Serie A markets (starting February 18, 2026 for new markets)
Query the fee-rate endpoint to check any specific market: 
GET https://clob.polymarket.com/fee-rate?token_id={token_id}

# Fee-enabled: { "fee_rate_bps": 1000 }
# Fee-free:    { "fee_rate_bps": 0 }

Maker Rebates Program

User-facing overview with full fee tables

Create CLOB Order via REST API

Full order structure and signing documentation