What is Kalshi's typical spread?

Measured across 4,094 markets in the last 7 days, Kalshi's median two-sided spread was 4.75%. Lower is better for bettors.

How often does Kalshi have the best odds?

Where at least five tracked books priced the same market, Kalshi posted the single best price 6.5% of the time over the last 7 days.

How is Kalshi's spread measured?

Omenizer records every price on every tracked market, converts them to implied probabilities, and sums each market's sides; the amount over 100% is the bookmaker's margin. The figure here is the median across all of the book's observed markets — measured, not quoted from marketing material.

Tracked bookmakers · prediction market

Kalshi: margins and market data

Prediction market. Prices on Kalshi are set by traders on an order book, not by a bookmaker. The figure below is the typical two-sided spread across its markets — measured exactly as we measure a bookmaker's margin, but it means something different: nobody set it as a fee, and Kalshi's own charges (where it has any) are billed separately rather than built into the price. It is reported here, and deliberately not ranked against sportsbooks.

Across 4,094 markets observed in the last 7 days (6 sports, 48 leagues), Kalshi's median spread was 4.75%. Where at least five books priced the same market, Kalshi had the single best price 6.5% of the time.

Market family	Median margin
Moneyline / match result	4.95%
Handicaps / spreads	4.45%
Totals	4.75%

Price only — fees not verified. The figure above is what Kalshi's prices imply, before any commission or fee it charges. Omenizer has not verified Kalshi's fee schedule, so it cannot be compared like-for-like with a venue whose costs we know, and it is left out of our cost comparison for the same reason. A low price with unknown fees is not the same as a low total cost.

Kalshi spread by sport

Only sports with 50+ observed Kalshi markets in the last 7 days are shown — a median over less is noise.

Sport	Median margin	Best price	Markets (7d)
Baseball	4.75%	4.6%	1,693
Tennis	4.75%	9.6%	1,041
Soccer	5.48%	6.0%	897
Basketball	4.72%	2.6%	307
American Football	4.56%	5.2%	101
Fighting	3.66%	12.7%	55

Who runs Kalshi

Availability: licensed in BR, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US. (reported — verification in progress)

What others say about Kalshi

Independent scores published elsewhere, each linked to the page it was read from and dated. Omenizer does not collect or host reviews — these are other people's numbers, reproduced so you can check them.

Source	Score	Reviews	Checked
Apple App Store (US)	4.8 / 5	464,215	source 2026-08-15
Google Play (US)	4.7 / 5	99,444	source 2026-08-15

In the last 90 days, Kalshi posted the board-leading price on 88 signals flagged by Omenizer's detection engine.

On an order book, the spread is what it costs to cross it: the gap between the best price to buy and the best price to sell. A 4.75% spread means the two sides of a typical Kalshi market together imply about 104.75% — the cost of trading in and straight back out. It is set by whoever is quoting at that moment, not by Kalshi, and it moves with liquidity.

FAQ

What is Kalshi's typical spread?: Measured across 4,094 markets in the last 7 days, Kalshi's median two-sided spread was 4.75%. Lower is better for bettors.
How often does Kalshi have the best odds?: Where at least five tracked books priced the same market, Kalshi posted the single best price 6.5% of the time over the last 7 days.
How is Kalshi's spread measured?: Omenizer records every price on every tracked market, converts them to implied probabilities, and sums each market's sides; the amount over 100% is the bookmaker's margin. The figure here is the median across all of the book's observed markets — measured, not quoted from marketing material.

See where Kalshi beats fair value — free account

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