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Polymarket volume and fees, by category

Where the money is actually trading on Polymarket right now, across every category, and the taker fee and maker rebate that applies to each.

Volume and open interest are pulled from Polymarket's public API and refreshed daily. The fee and rebate figures are its published per-category rates, so this reads against the fees and rebates calculator.

Trading activity
Volume (24h)
$48.2M
Open interest
$279.3M
Busiest category
Sports 51%
Maker rewards / day
$136k
CategoryVolume (24h)ShareTaker feesMaker rebates
Sports199$24.8M
51%
$621k$93k
Politics129$13.1M
27%
$262k$65k
Other135$3.4M
7.0%
$84k$21k
Crypto35$3.1M
6.4%
$108k$22k
Geopolitics40$1.7M
3.6%
FreeNone
Culture26$1.2M
2.4%
$29k$7k
Tech20$465k
1.0%
$9k$2k
Business2$257k
0.5%
$5k$1k
Economy10$207k
0.4%
$5k$1k
Science4$45k
0.1%
$1k$279

Count is active markets in each category. Taker fees and maker rebates are estimated on the 24h volume at a 50¢ average price, so they move with both volume and price; makers pay no fee and instead earn the rebate, their share of the taker fees. The exact per-trade maths is in the calculator.

The fee shown is at 50¢. The real one depends on your price.

Polymarket's taker fee follows a curve that peaks in the middle and fades toward 0 and 100¢, and makers earn the rebate instead of paying. The fees and rebates calculator does the exact maths for any price and size, across Polymarket, Kalshi and six more venues.

Volume, open interest and category splits come from Polymarket's public Gamma API, ranked across its 600 busiest active markets, so the long tail of tiny markets is not counted. Reward pools come from its CLOB rewards API, summed across every market with an active pool. Top traders come from its public leaderboard. Everything refreshes hourly. Fees and rebates are Polymarket's published per-category rates (checked August 2026). Nothing here is a position, wallet or yield of mine. See the full prediction markets directory for the other venues.