Every Kalshi series, classified by fee — including the 163 that charge makers.

Kalshi publishes no fee census and no bulk series export. This is the census: 14,528 series enumerated from the API, with 14,365 where a maker pays $0 and 163 where a resting order costs you on every quote.

Why it matters

Kalshi's fee is quadratic in price — it peaks near 50¢ and vanishes at the extremes — and on 163 of 14,528 series the maker pays too. Those 163 sit mainly in Sports (107), Science & Tech (21), Financials (13) and Economics (10) — including KXFED, the Fed funds market. Quote any of the other 14,365 and makers pay $0. No screener surfaces this; the API's fee_type field is the only source.

What you get

• kalshi_series_fee_census.csv — 14,528 series: fee_type, fee_multiplier, category, frequency, open markets/events, duration percentiles
• kalshi_maker_fee_series.csv — the 163 maker-fee series, ranked by open markets
• kalshi_category_summary.csv — series + maker-fee + open-market counts by category
• net_cost_calculator.py — the fee formula as a runnable calculator
• venue_economics.csv — maker/taker economics + incentive gates across Kalshi, Polymarket, ForecastEx, Novig, ProphetX, Gemini, Rothera

Get it

Provenance & method

Enumerated live from Kalshi's public API on 2026-10-01 (12-hour snapshot stream; 130,938 open markets; 4,220 listing series). Fee classification comes from the API's own fee_type field — not inferred. It is a point-in-time snapshot; Kalshi adds series and can change fees. This is the fee/universe layer only — no order-book or trade data.