Nippon Professional Baseball offers a distinct betting environment compared to its MLB counterpart. NPB games tend to be lower-scoring affairs, with tighter pitching duels and a more disciplined, small-ball approach that emphasizes manufacturing runs over raw power. The regular season runs from late March through October, followed by the Climax Series playoffs and the Japan Series. For bettors, this translates to a sport where run lines behave differently than in MLB — the 1.5-run line carries more weight in a league where 2-1 and 3-2 finals are common. Market depth is notably thinner than major North American sports, with most books offering moneylines, run lines, and totals but limited prop or in-game options.
Vig on NPB lines tends to run wider than what bettors encounter on MLB or other high-volume markets. The primary reason is lower global betting volume and less sharp-money activity, which gives sportsbooks less incentive to sharpen their lines. Books that do offer NPB often price in extra margin to manage their exposure on a league where their modeling may be less refined. This makes comparing odds across books particularly valuable — the spread between the best and worst available price on the same NPB game can be significant, sometimes exceeding the margin difference you'd see on a Premier League or NFL contest.
Seasonal patterns matter when evaluating NPB vig. Early in the season, lines tend to be softer as books calibrate to roster changes, new foreign player signings, and spring form. Midseason, once performance samples grow and betting volume stabilizes, margins can tighten modestly at sharper books. Key factors driving NPB odds include starting pitcher matchups — which dominate line movement even more than in MLB — along with stadium-specific dimensions, Japan's humid summer weather affecting ball flight, and pronounced home/away splits. Several NPB clubs, particularly the Hanshin Tigers and Fukuoka SoftBank Hawks, play in venues with strong home-field advantages that books don't always fully account for.
↓ 7-day trend: NPB average vig has improved by 0.15 percentage points over the past week (from 6.28% to 6.13%). Sportsbooks are tightening their lines — a good sign for bettors.
Cross-Sport Vig Comparison
NPB averages 6.13% vig across 18 sportsbooks. Here's how that compares to other active sports:
| Sport | Avg Vig | vs NPB |
|---|---|---|
| NPB | 6.13% | — |
| CFL | 4.61% | 1.52% higher |
| NCAAF | 4.68% | 1.45% higher |
| NFL | 4.73% | 1.40% higher |
| NFL Preseason | 4.39% | 1.74% higher |
Vig Rankings
| # | Sportsbook | Avg Vig | Grade | ML | Spreads | Totals | Events |
|---|---|---|---|---|---|---|---|
| 1 | Pinnacle | 3.49% | B+ | 2.99% | 3.62% | 3.87% | 6 |
| 2 | BetOnline.ag | 3.90% | B+ | 3.85% | 3.19% | 4.65% | 6 |
| 3 | LowVig.ag | 3.90% | B+ | 3.85% | 3.19% | 4.65% | 6 |
| 4 | DraftKings | 5.15% | C+ | 5.00% | 5.17% | 5.27% | 6 |
| 5 | FanDuel | 5.29% | C+ | 4.87% | 5.50% | 5.50% | 6 |
| 6 | Fanatics | 5.49% | C+ | 3.88% | 6.23% | 6.37% | 6 |
| 7 | BetUS | 5.52% | C+ | 5.71% | 4.32% | 6.52% | 6 |
| 8 | BetMGM | 5.69% | C+ | 5.49% | 5.57% | 6.01% | 6 |
| 9 | MyBookie.ag | 5.99% | C+ | 5.98% | 6.01% | 5.96% | 6 |
| 10 | Caesars | 6.39% | C | 6.31% | 6.55% | 6.32% | 6 |
| 11 | Hard Rock Bet | 6.54% | C | 6.64% | 6.61% | 6.37% | 6 |
| 12 | Bovada | 6.60% | C | 6.56% | 6.44% | 6.79% | 6 |
| 13 | theScore Bet (ESPN Bet) | 6.68% | C | 6.76% | 6.91% | 6.37% | 6 |
| 14 | Bally Bet | 7.15% | D | 6.10% | 7.77% | 7.69% | 5 |
| 15 | BetRivers | 7.15% | D | 6.10% | 7.77% | 7.69% | 5 |
| 16 | 888sport | 7.67% | D | 7.91% | 7.25% | 7.85% | 6 |
| 17 | Fliff | 7.68% | D | 7.20% | 7.33% | 8.50% | 2 |
| 18 | ReBet | 10.05% | F | 10.15% | 9.99% | 10.01% | 6 |
Frequently Asked Questions
Which sportsbook has the lowest NPB vig?
Pinnacle currently has the lowest vig at 3.49%, earning a grade of B+.
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.
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.