Tracked bookmakers · rank #4 of 99 by margin

Betfair Exchange (AU): margins and market data

Across 1,002 markets observed in the last 7 days (7 sports, 24 leagues), Betfair Exchange (AU)'s median bookmaker margin was 3.67% — rank #4 of 99 tracked books (lower is better for bettors). Where at least five books priced the same market, Betfair Exchange (AU) had the single best price 11.8% of the time.

Market family	Median margin
Moneyline / match result	3.62%
Handicaps / spreads	4.50%

Exchange note: figures are back prices before commission. A negative margin means the order book's prices summed to better than fair — the exchange's fee is charged on winnings instead of being built into the odds.

The margin is the bookmaker's built-in fee: the amount by which its implied probabilities exceed 100%. A 3.67% margin means that, on a typical Betfair Exchange (AU) market, prices pay out 3.67% less than a fair-value book would. Omenizer's fair prices remove this margin using sharp reference sources — the methodology explains how.

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Live reference — data refreshes daily · the dataset · all tracked bookmakers

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