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.

NBA Summer League Totals Odds Today

Q: Can I still compare sportsbooks for NBA Summer League?

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

NBA Summer League Odds Not Currently Available

NBA Summer League 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 NBA Summer League 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 NBA Summer League operates within a compressed window from early to mid-July, with the Las Vegas Summer League serving as the premier showcase running approximately two weeks. California Classic and Salt Lake City Summer League typically precede the Vegas action in late June and early July respectively. Unlike traditional NBA seasons, Summer League futures markets emerge in late May through early June, with championship winner, MVP, and individual player performance props becoming available as rosters are announced. Books also offer unique betting opportunities like "team to score most points in tournament" and rookie-specific props tied to draft position performance expectations.

Vig patterns in Summer League betting differ significantly from regular NBA action due to the experimental nature and limited sample sizes. Sportsbooks typically maintain wider margins on game spreads, often 15-20 cents wider than regular season lines, reflecting uncertainty around roster compositions and player effort levels. The best value windows emerge immediately after roster announcements but before public perception solidifies around specific teams. Books struggle to accurately price teams featuring multiple lottery picks versus veteran-heavy squads, creating opportunities for sharp bettors who track developmental priorities versus winning incentives.

Odds movements in Summer League are primarily driven by late roster additions, particularly when top draft picks confirm participation or veteran players join for rehabilitation purposes. Coaching staff announcements also create significant line movement, as certain assistant coaches are known for treating Summer League more competitively. Injury reports during the brief tournament window can shift championship odds dramatically, while strong opening game performances often lead to overreactions in MVP markets. Sharp money typically targets teams with clear developmental goals rather than those simply fulfilling league requirements, as motivation levels vary considerably across franchises.

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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.