Definition
Same Game Parlay
Also known as SGP, Same Game Multi
By Abhinav VasudevanReviewed Editorial policy
In short
A same game parlay combines multiple bets from a single match into one wager. Because the legs are correlated, books price them with custom algorithms that carry substantially higher margin than standard parlays.
A same game parlay lets you combine selections from one fixture. A team to win, a player to score, a total to go over. Into a single bet. Traditional parlays forbid this, and the reason why explains everything about how SGPs are priced.
The correlation problem
In a standard parlay, legs are assumed independent and the odds simply multiply. Within one match they are not independent at all.
If a striker scores two goals, their team is more likely to win. If a quarterback throws for 350 yards, the game total is more likely to go over. Multiplying those odds as though they were unrelated would badly overprice the bet in the bettor’s favour, which is precisely why books historically banned same-game combinations.
How books solve it
Modern SGP pricing uses correlation models that adjust the combined odds downward to account for the relationship between legs. Combine strongly correlated selections and the price will be far shorter than naive multiplication suggests.
This is legitimate. The correlation is real and must be priced. The issue is what else gets bundled in.
The margin
SGP pricing is proprietary and opaque, and the margin is consistently high. Standard parlays already compound vigorish per leg; SGPs add a correlation adjustment on top, and there is no way for a bettor to verify how much of the shortening is correlation and how much is margin.
Estimates commonly place effective SGP margin between 15% and 30%, with longer builds at the worse end. That is casino territory, on a product marketed as skilled betting.
Why they dominate anyway
SGPs are the fastest-growing sportsbook product for straightforward reasons: they let a bettor express a detailed narrative about one game they are already watching, and they produce large potential returns from small stakes.
They also concentrate all the risk in a single fixture, which is the opposite of diversification. One red card in the tenth minute can kill every leg at once.
If you bet them, keep the leg count low and be aware that you are paying a substantial premium for the convenience of building the bet in one place.
Common questions
Why are same game parlays priced differently?
Because the legs are correlated. If a striker scores twice, his team is more likely to win, so multiplying the odds as if independent would overprice the bet in your favour. Books use correlation models to adjust it down.
What margin do SGPs carry?
Commonly 15% to 30%, with longer builds at the worse end. The pricing is proprietary, so you cannot tell how much of the shortening is genuine correlation and how much is margin. That opacity is the real problem.