What is vig (vigorish) in sports betting?

Vig — short for vigorish, also called juice or overround — is the margin a sportsbook builds into its odds. It's the difference between the true probability of an outcome and what the odds imply. Lower vig means you keep more of your winnings on every bet. For example, a standard -110/-110 line has about 4.76% vig.

How often is this data updated?

We pull fresh odds from The Odds API three times per day — at 6:00 AM, 2:00 PM, and 10:00 PM UTC. Each snapshot captures the latest lines from every sportsbook that has posted odds. The timestamp at the top of the page shows the most recent refresh.

How is the vig grade calculated?

Each sportsbook is graded on a letter scale based on average vig: A+ (under 2%) is exceptional, A (2–3%) is excellent, B+ (3–4%) is above average, B (4–5%) is the industry standard, C (5–6%) is below average, and D (above 6%) indicates high-juice markets.

Why does lower vig matter for bettors?

Lower vig directly impacts your long-term returns. A bettor placing $1,000 per week at a book with 4% vig loses roughly $40/week to the house edge. At 2% vig, that drops to $20/week — a $1,040 difference over a year. For serious bettors, shopping for lower vig is one of the most reliable ways to improve profitability.

What sportsbooks do you track?

We track both regulated US sportsbooks (DraftKings, FanDuel, BetMGM, Caesars) and offshore books (Bovada, BetOnline, MyBookie, BetUS, LowVig.ag, BetAnySports). Data comes from The Odds API, which aggregates real-time lines from licensed sources.

BetMGM vs Pinnacle NFL Preseason Odds

Q: Can I still compare sportsbooks for NFL Preseason?

No live odds are currently available for NFL Preseason. In the meantime, check out our odds comparison page for other available options, or visit our overall Vig Index for cross-sport rankings.

NFL Preseason Odds Not Currently Available

NFL Preseason does not currently have odds in our data feed. When odds for events are available at sportsbooks they will be listed here. This page updates 3× daily from The Odds API — when sportsbooks begin posting NFL Preseason lines, the full analysis will become available.

In the meantime, check out our odds comparison page for other available options.

Not sure which sportsbook is right for you? Try the Sportsbook Selector — answer four questions and get a personalized recommendation backed by live vig data.

The NFL preseason represents a unique betting landscape that bridges the gap between Super Bowl Sunday in February and the regular season kickoff in September. Preseason games typically run from mid-August through early September, with Hall of Fame Game opening the slate in early August and four preseason weeks concluding before Week 1 of the regular season. Futures markets for the upcoming season—including Super Bowl odds, division winners, and season win totals—begin appearing immediately after the previous season ends, with significant line movements occurring throughout the spring following free agency signings, the NFL Draft in late April, and rookie minicamp performances.

The preseason betting ecosystem extends far beyond game totals and spreads on exhibition contests. Futures markets dominate the landscape, with Super Bowl odds, conference championship futures, and team win totals offering the most liquidity. Draft-related propositions emerge in the months leading up to April's selection process, including first overall pick odds, position-specific markets, and team-specific draft props. Free agency signings create immediate odds adjustments, particularly when marquee quarterbacks or defensive stars change uniforms, while coaching changes can shift win totals by multiple games depending on the perceived upgrade or downgrade at the helm.

Preseason vig patterns historically favor bettors more than regular season markets, as sportsbooks dedicate fewer resources to setting precise lines on exhibition games with unpredictable playing time for starters. The value window typically peaks during late preseason when public perception lags behind roster developments and depth chart changes. Major odds movements stem from quarterback competitions resolving, significant injuries during training camp, breakout performances by rookies or previously unknown players, and schedule strength analysis following the release of opponents and primetime slots. Smart bettors capitalize on the information gap between public perception and actual team construction during August's roster finalization period.

In-Season Sports

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How We Calculate These Numbers

Data Source: All odds on this page come from The Odds API, which aggregates real-time lines from licensed US and offshore sportsbooks. We track moneyline, spread, and totals markets across every sport with active betting lines.
Update Frequency: We pull a fresh snapshot of every tracked market three times per day — at 6:00 AM, 2:00 PM, and 10:00 PM UTC. Each snapshot captures the latest lines from every sportsbook that has posted odds for a given event. The timestamp at the top of each page tells you exactly when the data was last refreshed.
Vig Calculation: Vig (short for vigorish, also called juice or overround) measures the margin a sportsbook builds into its odds. We calculate it by converting the odds on each side of a market to implied probabilities, summing those probabilities, and subtracting 100%. For example, a market priced at -110/-110 implies 52.38% on each side — a total of 104.76%, meaning a vig of 4.76%. Lower vig means better value for bettors because you keep more of your winnings.
Per-Market Breakdown: We compute vig separately for each market type: moneyline (h2h), point spreads, and totals (over/under). The "average vig" shown for each sportsbook is the mean across all market types weighted by the number of events sampled in each market.
Grading Scale: Every sportsbook receives a letter grade based on its average vig: A+ (under 2%) is exchange-level pricing. A (2–3%) is very competitive. B+ (3–4%) is above average. B (4–5%) is the industry standard — a -110/-110 line is 4.76%. C+ (5–6%) is slightly below average. C (6–7%) is below average. D (7–8%) is high vig. D− (8–10%) is very high vig. F (10%+) is predatory pricing. See the full Vig Index Methodology for formulas, worked examples, and known limitations.
Trend Tracking: We store daily snapshots for 30 days, allowing us to show 24-hour and 7-day vig trends. A downward trend (improving) means sportsbooks are tightening their lines — often in response to increased competition or higher betting volume as a season heats up.