Sportsbook vig, measured and ranked
Every sportsbook hides its cost inside the odds. We compute the actual overround of 20 US books from the lines our scanner ingests — every game, every market, every 15 minutes — and rank them here over the trailing 30 days. The field average is 5.05%; the cheapest book is LowVig at 3.61% and the most expensive is ReBet at 6.80%.
Overround by book, last 30 days
| # | Sportsbook | Overall | Moneyline | Spreads | Totals | Cheapest sport | Arb games (30d) | Lines |
|---|---|---|---|---|---|---|---|---|
| 1 | LowVig | 3.61% | 3.01% | 3.48% | 4.06% | MLB 2.99% | 120 | 332,436 |
| 2 | BetAnySports | 4.21% | 3.69% | 4.20% | 4.54% | MLB 4.05% | 24 | 162,610 |
| 3 | BetOnline | 4.29% | 3.01% | 4.61% | 4.76% | NHL 3.35% | 46 | 332,571 |
| 4 | Hard Rock Bet | 4.40% | 3.94% | 4.81% | 4.43% | MLB 3.16% | 253 | 323,989 |
| 5 | Hard Rock Bet (OH) | 4.45% | 4.51% | 4.39% | 4.46% | MLB 2.43% | 2 | 189,444 |
| 6 | Bovada | 4.46% | 4.21% | 4.47% | 4.64% | NHL 4.19% | 490 | 515,272 |
| 7 | Hard Rock Bet (FL) | 4.52% | 4.14% | 4.71% | 4.73% | NFL 4.52% | 0 | 108,711 |
| 8 | DraftKings | 4.54% | 4.26% | 4.67% | 4.70% | NHL 4.32% | 346 | 2,445,123 |
| 9 | ESPN BET | 4.54% | 4.11% | 4.86% | 4.65% | MLB 4.42% | 240 | 535,839 |
| 10 | FanDuel | 4.54% | 3.89% | 4.84% | 4.89% | MLB 4.43% | 409 | 428,696 |
| 11 | BetUS | 4.68% | 3.23% | 4.73% | 4.85% | MLB 3.64% | 53 | 839,565 |
| 12 | Fanatics Sportsbook | 4.76% | 4.56% | 4.91% | 4.82% | NBA 4.63% | 298 | 205,323 |
| 13 | BetMGM | 5.08% | 4.47% | 4.68% | 5.80% | NFL 4.46% | 447 | 424,401 |
| 14 | betPARX | 5.28% | 4.76% | 5.10% | 5.70% | NBA 4.85% | 429 | 376,807 |
| 15 | Bally Bet | 5.33% | 4.81% | 5.17% | 5.74% | NBA 4.85% | 134 | 376,699 |
| 16 | BetRivers | 5.51% | 5.03% | 5.42% | 5.86% | NFL 5.19% | 90 | 376,149 |
| 17 | Caesars | 5.87% | 5.16% | 6.21% | 6.26% | MLB 3.91% | 463 | 2,079,854 |
| 18 | MyBookie | 6.07% | 5.19% | 6.19% | 6.42% | MLB 4.66% | 509 | 317,918 |
| 19 | Fliff | 6.40% | 5.51% | 6.78% | 6.78% | MLB 6.14% | 224 | 149,986 |
| 20 | ReBet | 6.80% | 5.95% | 7.42% | 7.04% | NBA 6.31% | 318 | 584,331 |
Overround = sum of implied probabilities − 100%, weighted by lines observed. “Arb games” counts distinct game-markets where this book was one side of a cross-book opportunity our engine recorded (edges above 15% are excluded as line mismatches). Last refreshed Sep 9, 2026.
Which books disagree with each other
Cross-book arbitrage needs two books quoting the same line at different prices. These pairs produced the most opportunities over the last 30 days — click through for the sport breakdown, edge distribution and recent examples.
| Pair | Game-markets with an arb | Avg net edge | Max net edge | Sports | Last seen |
|---|---|---|---|---|---|
| FanDuel vs MyBookie | 120 | 4.02% | 14.62% | MLB | Sep 9, 2026 |
| Bovada vs MyBookie | 109 | 4.04% | 14.95% | MLB | Sep 9, 2026 |
| betPARX vs MyBookie | 97 | 4.75% | 14.62% | MLB, MLS | Sep 9, 2026 |
| MyBookie vs Caesars | 83 | 4.58% | 14.96% | MLB | Sep 9, 2026 |
| BetMGM vs MyBookie | 77 | 5.02% | 14.79% | MLB | Sep 9, 2026 |
| BetMGM vs Bovada | 75 | 4.53% | 14.23% | MLB | Sep 9, 2026 |
| FanDuel vs Caesars | 65 | 1.67% | 13.05% | NFL, MLB | Sep 9, 2026 |
| BetMGM vs betPARX | 63 | 3.69% | 14.52% | MLB | Sep 9, 2026 |
| DraftKings vs MyBookie | 63 | 5.28% | 14.21% | MLB | Sep 9, 2026 |
| betPARX vs Caesars | 61 | 3.89% | 13.63% | MLB | Sep 9, 2026 |
| betPARX vs Bovada | 58 | 3.49% | 12.09% | MLB, MLS | Sep 9, 2026 |
| DraftKings vs Caesars | 55 | 1.64% | 13.00% | NFL, MLB | Sep 9, 2026 |
By sport
Margins differ by sport as much as by book. See the per-sport rankings and which books pair up most: MLB · NFL · NBA · NHL · MLS.
| Sportsbook | MLB | NFL | NBA | NHL | MLS |
|---|---|---|---|---|---|
| LowVig | 2.99% | 3.18% | 3.33% | 3.35% | 5.27% |
| BetAnySports | 4.05% | 4.44% | 4.71% | 4.48% | 4.26% |
| BetOnline | 3.55% | 4.40% | 4.72% | 3.35% | 5.27% |
| Hard Rock Bet | 3.16% | 4.52% | — | 5.34% | — |
| Hard Rock Bet (OH) | 2.43% | 4.82% | 4.70% | — | — |
| Bovada | 4.57% | 4.51% | 4.53% | 4.19% | 4.62% |
| Hard Rock Bet (FL) | — | 4.52% | — | — | — |
| DraftKings | 4.49% | 4.57% | 4.57% | 4.32% | — |
| ESPN BET | 4.42% | 4.53% | 4.52% | 4.69% | — |
| FanDuel | 4.43% | 4.57% | 4.49% | 4.84% | — |
| BetUS | 3.64% | 4.66% | — | 4.23% | 6.54% |
| Fanatics Sportsbook | 4.89% | 4.64% | 4.63% | 4.72% | — |
| BetMGM | 4.81% | 4.46% | 4.60% | 4.55% | 8.74% |
| betPARX | 5.23% | 4.88% | 4.85% | 5.13% | 6.47% |
| Bally Bet | 5.42% | 4.88% | 4.85% | 5.13% | 6.49% |
| BetRivers | 5.20% | 5.19% | 5.56% | 5.52% | 6.45% |
| Caesars | 3.91% | 6.15% | 4.58% | 4.68% | — |
| MyBookie | 4.66% | 5.15% | — | — | 7.92% |
| Fliff | 6.14% | 6.47% | — | — | 9.89% |
| ReBet | 6.39% | 6.70% | 6.31% | 7.94% | — |
The US Sportsbook Vig Index
One number for the whole market: the line-weighted average overround across every book we scan over the trailing 30 days — currently 5.05%. It updates hourly and you are welcome to embed it (it links back here):
<a href="https://arbmonster.com/sportsbooks"><img src="https://arbmonster.com/badge/vig-index.svg" alt="US sportsbook vig index" width="360" height="72"></a>
Frequently asked questions
Which sportsbook has the lowest vig?
It changes by sport and market, which is why this page is ranked from live measurements rather than a fixed list. Over the last 30 days the lowest overall margin among the books we scan is shown at the top of the table; reduced-juice books such as LowVig and BetOnline typically sit near the bottom of the vig scale, while recreational books and pick'em-style apps sit near the top.
How is the vig measured?
For every game and market the scanner ingests, we convert each side's odds to an implied probability and sum them. The amount over 100% is the overround; we weight each book's figure by the number of lines observed and average over 30 days. Nothing is estimated from marketing claims — every number traces to lines we recorded.
Why does vig matter for arbitrage?
Two books each holding 4.5% need to disagree by more than roughly 4.5% combined before backing both sides costs less than the payout. Low-vig books make cross-book arbitrage possible; the pairs that generate the most opportunities are usually one soft book against one sharp one.
Is a lower vig always better for me?
For straight bets, yes: a lower margin means a better price on average. For arbitrage the relevant question is which books disagree with each other, and that is a separate table below. Book availability also varies by state.
Related: what vig is · vig calculator · prediction-market fee schedules · how we measure. Market names use the odds feed's labels (Moneyline, Spreads, Totals).