What the Vigorish Actually Is
Vigorish, or “vig,” is the sportsbook’s cut. Think of it as the house’s commission for taking your bet. It’s not a mystery fee hidden in fine print; it’s baked into the odds you see on the board. If a prop line reads -110, that extra 10 means the house expects to keep roughly 9.5% of the action.
Why It Matters More Than You Think
Look: a prop bet isn’t just a simple win/lose. It’s a tug‑of‑war between two odds that both carry vig. Over the course of a season, that tiny percentage compounds, turning a winning streak into a breakeven or even a loss. Seasoned bettors track it like a blood pressure monitor – ignore it, and you’ll feel the pinch later.
Crunching the Numbers
Here’s the math in plain English: Convert -110 to a decimal, 100/110 = 0.909. Add one for the stake, you get 1.909. The implied probability is 1/1.909 ≈ 52.4%. Subtract the true probability of the event, and the gap is the vig. The higher the gap, the more you’re feeding the book.
Hidden Costs in Exotic Props
By the way, exotic props – “Will the quarterback throw over 300 yards?” – often carry steeper vig than standard totals. The bookmaker inflates the line to protect against a single big swing. Those 7% or 8% edges you casually overlook will gnaw at your bankroll faster than a linebacker’s blitz.
How to Spot an Inflated Vigorish
First, compare the same prop across multiple books. If one offers -115 while another sits at -105, that extra 10 points is the vig whispering “don’t bet here.” Second, watch line movement. A rapid shift toward one side usually signals heavy action and, consequently, a higher vig to balance exposure.
Strategies to Cut the Juice
One, shop around. The internet is a buffet of odds; you’re not forced to eat at the greediest buffet. Two, consider “reverse lines.” When the vig on your preferred side is too steep, bet the opposite side at a different venue with a tighter spread. Three, use “bet sizing” to counteract the vig. If the vig is 5%, raise your stake by roughly 5% to stay neutral on expected value.
Bottom Line Action
Next time you glance at a prop with a -110 line, calculate the implied probability, compare it to the real odds, and decide if that extra 9.5% fee is worth the risk. Adjust your stake accordingly, and you’ll stop feeding the book every single week.