BetOnline: margins and market data
Across 1,508 markets observed in the last 7 days (9 sports, 35 leagues), BetOnline's median bookmaker margin was 4.75% — rank #6 of 99 tracked books (lower is better for bettors). Where at least five books priced the same market, BetOnline had the single best price 9.5% of the time.
| Market family | Median margin |
|---|---|
| Moneyline / match result | 6.03% |
| Handicaps / spreads | 4.68% |
| Totals | 4.55% |
In the last 90 days, BetOnline posted the board-leading price on 977 signals flagged by Omenizer's detection engine.
The margin is the bookmaker's built-in fee: the amount by which its implied probabilities exceed 100%. A 4.75% margin means that, on a typical BetOnline market, prices pay out 4.75% less than a fair-value book would. Omenizer's fair prices remove this margin using sharp reference sources — the methodology explains how.
See where BetOnline beats fair value — free account