How Pari Mutual Betting Works
Pari Mutuel is french, meaning to bet amongst ourselves. Payout is determined after all the bets are in and the results are known
For example, ten horses have the following amounts bet on them
A................... 250
B....................150
C................... 100
D....................500
E..................... 75
F..................... 50
G..................... 20
H......................10
I.....................400
J.................... 650
2205 Total Bet
The track operator and the government take a predetermined cut, for example 10% each.
Operator..........-220.50
Government......-220.50
......................-441.00
The balance is available for the bettors. in this case 2205-441=1764.00
From this amount, deduct the amount bet on the winning horse(s)
.
Divide that amount by the amount bet on the winning horse to determine the amount won on each dollar bet on the horse
.................. .Bet...............Win per $1 bet
A.......1764....250.....1514.......6.06
B.......1764....150.....1614......10.76
C.......1764....100.....1664......16.64
D.......1764....500.....1264........2.53
E.......1764......75.....1689........2.52
F.......1764......50.....1714.......34.28
G.......1764......20.....1744.......87.20
H.......1764......10.....1754.....175.40
I........1764....400.....1364.........3.41
J........1764....650.....1114.........1.71
Thus for a winning bet on A, the bettor would get his bet of $1 and a profit of $6.06, for a total payout of $7.06. That's $14.12 on a two buck bet
If H was the winner, a bettor would get his bet of $1 and a profit of $175.40, for a total payout of $176.40
At race tracks, the $1 return is in $5 cent increments, so if F was the winner, the profit to the bettor would be $34.25, the track pocketing the 3 cents, called breakage.
Suppose the amounts above were Place bets.
If the first two horses were the favourites
J................650
D...............500
Total.........1150
1764-1150=614 Divided equally - 307 each
...................................Profit per $1
J................650.....307....0.47
D...............500.....307....0.61
Thus J would get back $1.47 for each dollar bet and D would get $1.61
The order of finish does not alter the payout.
Consider Longshots coming first and second
G...............20
H...............10
Total..........30
1764-30=1734 Divided 50-50 - 867 each
G...............20......867.....43.35
H...............10......867.....86.70
Thus G would pay $44.35 and H would pay $87.70
Here endeth the lesson
