Fees

Shard charges 0% maker fees and 0% taker fees. No builder fees, no platform fees.

Standard Polymarket protocol fees apply set by the protocol at match time, not by Shard. All fees are displayed transparently on each trade within Shard before you confirm.

Note Polymarket protocol fees are subject to change at any time by the protocol. The figures below reflect current rates. Always refer to the official Polymarket fee documentation for the most up-to-date information.

---

Fee Structure

Fees are calculated using the following formula:

fee = C × feeRate × p × (1 - p)

Where C = number of shares traded and p = price of the shares.Makers are never charged fees. Only takers pay fees. The fee parameters differ by market category:

Category	Taker Fee Rate	Maker Fee Rate	Maker Rebate
Crypto	0.07	0	20%
Sports	0.03	0	25%
Finance	0.04	0	25%
Politics	0.04	0	25%
Economics	0.05	0	25%
Culture	0.05	0	25%
Weather	0.05	0	25%
Other / General	0.05	0	25%
Mentions	0.04	0	25%
Tech	0.04	0	25%
Geopolitics	0	0	—

Taker fees are calculated in USDC and vary based on the share price. The fee amount in USDC is symmetric around 50% probability — a trade at 30¢ incurs the same dollar fee as a trade at 70¢.

​Fee Tables (100 Shares)

• Crypto

• Sports

• Finance / Politics / Mentions / Tech

• Economics / Culture / Weather / Other

Price	Trade Value	Taker Fee (USDC)
$0.01	$1	$0.07
$0.05	$5	$0.33
$0.10	$10	$0.63
$0.15	$15	$0.89
$0.20	$20	$1.12
$0.25	$25	$1.31
$0.30	$30	$1.47
$0.35	$35	$1.59
$0.40	$40	$1.68
$0.45	$45	$1.73
$0.50	$50	$1.75
$0.55	$55	$1.73
$0.60	$60	$1.68
$0.65	$65	$1.59
$0.70	$70	$1.47
$0.75	$75	$1.31
$0.80	$80	$1.12
$0.85	$85	$0.89
$0.90	$90	$0.63
$0.95	$95	$0.33
$0.99	$99	$0.07

The fee in USDC peaks at 50% probability ($1.75) and decreases symmetrically toward both extremes.

​Fee Precision

Fees are rounded to 5 decimal places. The smallest fee charged is 0.00001 USDC. Anything smaller rounds to zero, so very small trades near the extremes may incur no fee at all.

Full fee documentation: docs.polymarket.com/trading/fees

---

Fee display All applicable Polymarket protocol fees are shown directly within Shard on each market and each trade no hidden costs, no surprises at execution.