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.

888sport NBL Odds

Q: Can I still compare sportsbooks for NBL?

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

NBL Odds Not Currently Available

NBL 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 NBL 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 NBL regular season typically runs from late September or early October through to February, with the best-of-five semifinal and grand final series stretching into March and occasionally into early April. Preseason games usually take place in September, and futures markets for the upcoming season begin appearing as early as July and August, once the roster picture starts to crystallize. This makes the June-to-August window the core off-season period, and it's precisely when sharp bettors begin forming their assessments before the broader market catches up.

Off-season betting opportunities in the NBL revolve heavily around championship winner futures, MVP markets, and season win totals. The league's unique position as a pathway for NBA-bound talent — through its Next Stars program — means roster turnover can be dramatic. When a club like the New Zealand Breakers or Melbourne United signs a high-profile Next Stars prospect or lures an established import, championship futures can shift significantly overnight. Free agency moves involving key local players, such as a proven combo guard switching clubs, also reshape win total lines. Coaching changes carry outsized weight in a ten-team league where margins are thin; a new head coach at a middling franchise can move that team's title odds by several tiers. Draft and development signings don't generate the same prop market depth as the NBA, but astute bettors track NBL1 standouts and NCAA Australians returning home as early indicators of roster quality.

Vig patterns in NBL markets tend to follow a predictable arc. Preseason and early-season lines from offshore and Australian-licensed books often carry wider margins — sometimes 7-8% overround on match lines — reflecting lower liquidity and greater uncertainty around new rosters. As the season progresses into December and January, increased betting volume and clearer form lines typically compress the vig closer to 5-6%. Playoff markets tighten further as bookmakers sharpen their models for fewer, higher-profile games. The best value window historically falls in the first four to six weeks of the regular season, when bookmakers are still calibrating to new imports, lineup combinations, and coaching systems — creating exploitable gaps for bettors who've done their homework during the off-season.

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.