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Fees & Economics

What one side pays to trade, including a broker charge where public data can support it, how that cost changes with price, and which realized fee series can be measured from public venue files.

Fees by day

Modeled one-side customer cost or exchange revenue, in dollars, day by day. Use the measure toggle to keep those two questions separate.

Every venue here is read from one file on one lineage. For DKeX, "fee cost" adds DraftKings Predictions' introducing-broker commission to the DKeX taker fee from the retail launch on June 26, 2026; "exchange revenue" remains DKeX's filed taker-plus-maker charge and excludes the broker. Before that launch, the public DKeX tape carries exchange fees only. OG/Crypto.com remains the standard direct-member exchange benchmark: Crypto.com's app changed to a 1–1.75¢ taker range on June 30, but the daily bulletin has neither prices nor member roles needed to reconstruct a retail point. Two venues are absent rather than zero, and a third is mostly absent. Novig publishes its straight-book fee as a bounded range rather than a point estimate, so it has no single defensible daily number to rank against the others. ProphetX charges on a trader's net gains per market rather than per contract, so a daily fee cannot be derived from its tape at all. Rothera's fee estimate only starts , so the % of its contracts traded before that carry no fee and are not drawn.

Cumulative fees

The same series, accumulated over the window you pick below. Kalshi is roughly an order of magnitude above the field, so untick it — or switch to a log scale — to read the competitors against each other.

Accumulated from the start of the window set just above, not from each venue’s first day, so the lines answer "who collected more over this window". Still-filling days are excluded. Window totals: .

Published fee schedules

Published fee per contract for one side of a $1 binary at each price, before order-level rounding. The current DraftKings-on-DKeX line includes both its broker commission and DKeX's exchange fee.

DraftKings Predictions is an introducing broker, not an FCM. Its current DKeX customer line is the broker's disclosed price ladder plus DKeX's separately filed exchange fee; DKeX exchange revenue is still the gray exchange-only line. The DraftKings HTML currently prints 8.80¢ at 97–98¢, a tenfold break in an otherwise descending tail that would make a winning 98¢ contract cost more than its $1 payout. This chart treats it as the evident missing-zero typo, 0.88¢, until DraftKings corrects or confirms it. Crypto.com's app publishes only a 1–1.75¢ range, so both bounds are drawn rather than an invented curve; the separate 2¢ line is OG/Crypto.com's standard direct-member exchange fee. Kalshi and Underdog have the same one-side curve, but Underdog charges both sides. ProphetX is absent because its published charge is based on a trader's net gains per market, not contract price. Novig pre-game straight trades are free and are stated here rather than drawn as a zero line.

Realized fee per contract

Modeled one-side fees divided by reported contracts, with OG/Crypto.com restated per $1 of contract because it redenominated twice. DKeX includes the DraftKings broker charge from the retail launch; OG/Crypto.com is the direct-member exchange benchmark, not the app's newer retail range. Venues without a defensible daily numerator are absent, not zero.

Kalshi fee revenueDaily and cumulative exchange revenue, including maker charges. Parlay economicsRealized bettor outcomes and cash-outs where supported.