What Is the Vig?
The vig (short for vigorish), also called juice, is the commission that a sportsbook charges on every bet. It's the built-in margin that ensures the sportsbook profits over time regardless of the outcome. Think of it as the "fee" you pay for the privilege of placing a wager.
The vig isn't listed as a separate line item—it's embedded directly in the odds. Understanding how it works is essential because the vig is the primary obstacle standing between you and long-term profitability.
How the Standard -110/-110 Line Works
The most common example of the vig is a standard point spread or totals bet priced at -110 on both sides.
Example: NFL Week 8 — San Francisco 49ers at Seattle Seahawks
| Market | Line | Odds |
|---|---|---|
| 49ers | -3.5 | -110 |
| Seahawks | +3.5 | -110 |
At -110, you need to bet $110 to win $100. If the sportsbook takes $110 in bets on each side (a perfectly balanced book), here's what happens:
- Total money in: $110 (49ers side) + $110 (Seahawks side) = $220
- Payout to the winning side: $110 (returned stake) + $100 (profit) = $210
- Sportsbook profit: $220 − $210 = $10
That $10 is the vig. The sportsbook collects $220 and pays out $210, keeping $10 (4.55% of the total handle) as profit. This happens on every bet, every game, every day—which is why sportsbooks are enormously profitable businesses.
Calculating the Vig Percentage
To calculate the vig on any market, convert the odds on both sides to implied probability and add them together. The amount exceeding 100% is the vig (also called overround).
Formula:
Vig % = (Implied Probability Side A + Implied Probability Side B) − 100%
Example 1: Standard -110/-110
- Side A implied probability: 110 ÷ 210 = 52.38%
- Side B implied probability: 110 ÷ 210 = 52.38%
- Total: 52.38% + 52.38% = 104.76%
- Vig: 4.76%
Example 2: Lopsided Odds -200/+170
- Favorite (-200): 200 ÷ 300 = 66.67%
- Underdog (+170): 100 ÷ 270 = 37.04%
- Total: 66.67% + 37.04% = 103.71%
- Vig: 3.71%
Example 3: Heavy Favorite -350/+280
- Favorite (-350): 350 ÷ 450 = 77.78%
- Underdog (+280): 100 ÷ 380 = 26.32%
- Total: 77.78% + 26.32% = 104.10%
- Vig: 4.10%
Vig Across Different Sportsbooks
Not all sportsbooks charge the same vig. The standard across major US operators is roughly 4–5% on spread and totals markets, but there's meaningful variation:
| Sportsbook | Typical Spread/Totals Vig | Notes |
|---|---|---|
| DraftKings | 4.5–5.0% | Standard US pricing |
| FanDuel | 4.5–5.0% | Standard US pricing |
| BetMGM | 4.5–5.0% | Standard US pricing |
| Caesars Sportsbook | 4.5–5.5% | Sometimes higher on less liquid markets |
| PointsBet | 4.0–5.0% | Competitive on featured games |
| BetRivers | 4.5–5.0% | Standard pricing |
| Pinnacle | 2.0–3.0% | Lowest vig in the industry (not available in most US states) |
| Circa Sports | 3.0–4.0% | Reduced juice, Nevada-based |
The difference between a 5% vig and a 2.5% vig is enormous over hundreds or thousands of bets. At 5% vig, a break-even bettor loses about 2.5 cents per dollar wagered. At 2.5% vig, they lose about 1.25 cents. This is why line shopping across sportsbooks is one of the highest-impact habits a bettor can develop.
How the Vig Affects Long-Term Profitability
Here's the math that every bettor needs to internalize: at standard -110/-110 odds, you need to win 52.38% of your bets just to break even. Not 50%—52.38%.
This 2.38% above 50% is the cost of the vig. Over a small sample of 20 or 50 bets, the vig barely matters. Over 1,000 or 5,000 bets, it's the difference between profit and loss.
Break-even win rates at different odds:
| Odds | Implied Probability | Break-Even Win Rate |
|---|---|---|
| -110 / -110 | 52.38% each | 52.38% |
| -105 / -105 | 51.22% each | 51.22% |
| -115 / -105 | Variable | ~52.9% (on -115 side) |
| -120 / +100 | Variable | ~54.5% (on -120 side) |
Every percentage point of vig you can eliminate brings your break-even point closer to 50%, making profitability dramatically more achievable.
Strategies to Minimize the Vig
Line Shopping
Line shopping means checking the same bet across multiple sportsbooks and placing your wager at the book with the best odds. This is the simplest and most effective way to reduce the vig you pay.
Example:
You want to bet the Over 48.5 on an NFL game. Here are the odds at three sportsbooks:
| Sportsbook | Over 48.5 Odds |
|---|---|
| DraftKings | -112 |
| FanDuel | -110 |
| BetMGM | -108 |
By choosing BetMGM at -108 instead of DraftKings at -112, you save $4 in vig on a $100-level bet. This adds up quickly over hundreds of bets.
Reduced Juice Sportsbooks
Some sportsbooks offer reduced juice as a competitive advantage. Instead of -110/-110, they might offer -105/-105, cutting the vig nearly in half. Pinnacle is the most well-known reduced-juice book globally. In the US, Circa Sports in Las Vegas and some promotional offerings from mainstream books provide reduced juice on select markets.
Taking Advantage of Promotions
Many sportsbooks offer odds boosts, profit boosts, and other promotions that effectively reduce or eliminate the vig on specific bets. DraftKings, FanDuel, and BetMGM regularly feature daily odds boosts that can make certain bets +EV even when they otherwise wouldn't be.
Betting at the Right Time
Odds move throughout the day as money flows in. Early lines (when they first open) and late lines (just before game time) often have different vig levels. Sharp bettors study line movements to identify windows where the vig is lowest.
Devigging: Finding True Odds
Devigging (or de-juicing) is the process of removing the vig from a sportsbook's odds to calculate the true odds (also called fair odds or no-vig odds). This reveals what the sportsbook actually believes the probability of each outcome is, stripped of the margin.
How to Devig a Line
The most common method is multiplicative devigging (also called the power method). Here's how it works:
- Convert the odds on each side to implied probability.
- Add the probabilities together (this will exceed 100%).
- Divide each side's probability by the total to normalize them to 100%.
Example: Devigging -150/+130
- Favorite (-150): 150 ÷ 250 = 60.00%
- Underdog (+130): 100 ÷ 230 = 43.48%
- Total: 60.00% + 43.48% = 103.48%
- True probability of favorite: 60.00% ÷ 103.48% = 57.98%
- True probability of underdog: 43.48% ÷ 103.48% = 42.02%
The devigged (fair) odds are approximately -138 for the favorite and +138 for the underdog.
Why Devigging Matters
Devigging is the foundation of +EV (positive expected value) betting. Once you know the true odds, you can compare them against the actual odds being offered by sportsbooks. If a sportsbook is offering better odds than the devigged fair line, that bet has positive expected value.
For example, if the devigged fair line on the underdog is +138 but another sportsbook is offering +155, that +155 line is a +EV bet—you're getting paid more than the outcome is worth.
How WagerWiz Identifies Opportunities Beyond the Vig
WagerWiz automates the entire process described above. For every market across every major sportsbook, WagerWiz:
- Aggregates odds in real time from DraftKings, FanDuel, BetMGM, Caesars, PointsBet, and more.
- Deviggs sharp lines using the sharpest books in the market as the source of truth.
- Calculates true probabilities for each outcome.
- Compares every sportsbook's odds against those true probabilities.
- Flags +EV opportunities where a sportsbook is offering odds that exceed the fair value.
Instead of manually comparing odds and doing vig calculations by hand, WagerWiz's screener presents you with a clean list of bets where the math is in your favor—opportunities where the odds offered overcome the vig and then some.
FAQ
Is the vig the same as the house edge?
They're closely related but not identical. The vig is the sportsbook's margin built into the odds, expressed as the overround above 100%. The house edge is the expected loss per dollar wagered from the bettor's perspective. On a standard -110/-110 market, the vig (overround) is about 4.76%, and the house edge (expected loss per dollar bet) is about 2.38%. The distinction matters because you pay the vig on one side, not both.
Can I avoid the vig entirely?
You can't completely avoid the vig, but you can minimize it significantly. Line shopping, using reduced-juice books, and taking advantage of odds boosts and promotions all reduce the effective vig you pay. Arbitrage betting (backing both sides at different sportsbooks when the combined implied probabilities are below 100%) can technically eliminate the vig entirely, though arb opportunities are rare and carry their own risks.
Why do some bets have higher vig than others?
Sportsbooks set higher vig on markets where they have more uncertainty or where the market is less liquid. Props, parlays, and niche sports markets typically carry more vig than main market spreads and totals for popular leagues like the NFL and NBA. Same-game parlays often carry the highest vig of any product offered by sportsbooks.
How much does the vig really cost me over a year?
If you bet $100 per game at standard -110 vig and place 500 bets in a year, you're paying approximately $2.38 per bet in vig, totaling about $1,190 per year. By consistently line shopping and reducing your average vig from 4.76% to 3.0%, you'd save roughly $440 per year—and that's before considering that lower vig makes it easier to find +EV bets.
What is a "no-vig line"?
A no-vig line (or fair odds line) is what the odds would be if the sportsbook charged zero commission. It represents the true probability of each outcome as reflected by the market. No sportsbook offers no-vig lines directly, but you can calculate them through the devigging process. WagerWiz displays no-vig fair odds for every market, making it easy to evaluate which sportsbook lines offer genuine value.
