LegBook oddsPinnacle fair
Leg 1✕
Leg 2✕
Leg 3✕
+ Add leg
Stake $
Expected value
-8.07%
Parlay tax — you lose about $8.07 of every $100 staked, on average.
Book pays
+811
Fair value
+891
Payout
$911.16
True win prob
10.1%
Every leg’s margin compounds. A fair parlay would pay +891; the book pays +811. That gap is the tax.