BetMGM vig, measured: 4.96%
BetMGM ranks #14 of 21 US sportsbooks by overround over the last 30 days (lower is cheaper). Its margin is below the field average of 5.11%. In that window it was one side of a cross-book arbitrage on 838 game-markets.
BetMGM vig by sport
| Sport | Overround | Rank in sport | Field average | Lines |
|---|---|---|---|---|
| NFL | 4.38% | #3 of 21 | 4.75% | 118,915 |
| NHL | 4.56% | #7 of 16 | 4.78% | 127,605 |
| NBA | 4.61% | #7 of 15 | 4.73% | 148,599 |
| MLB | 4.81% | #13 of 19 | 4.64% | 112,302 |
| MLS | 8.72% | #10 of 11 | 6.65% | 49,750 |
Daily margin, last 30 days
Overround per day by market type. Books adjust their margin around big slates and sharp action; the trend is more telling than any single day.
| Date | Moneyline | Spreads | Totals |
|---|---|---|---|
| Sep 20, 2026 | 4.44% | 4.66% | 5.49% |
| Sep 19, 2026 | 4.45% | 4.70% | 5.82% |
| Sep 18, 2026 | 4.45% | 4.65% | 5.82% |
| Sep 17, 2026 | 4.40% | 4.61% | 5.64% |
| Sep 16, 2026 | 4.43% | 4.67% | 5.33% |
| Sep 15, 2026 | 4.41% | 4.61% | 5.31% |
| Sep 14, 2026 | 4.42% | 4.56% | 5.29% |
| Sep 13, 2026 | 4.48% | 4.70% | 5.44% |
| Sep 12, 2026 | 4.47% | 4.65% | 5.36% |
| Sep 11, 2026 | 4.45% | 4.66% | 5.30% |
| Sep 10, 2026 | 4.42% | 4.60% | 5.45% |
| Sep 9, 2026 | 4.49% | 4.63% | 5.81% |
| Sep 8, 2026 | 4.49% | 4.61% | 5.76% |
| Sep 7, 2026 | 4.48% | 4.58% | 5.83% |
Which books disagree with BetMGM
An arbitrage needs two books on the same line at prices summing under 100%. These are the books that produced one with BetMGM most often over 30 days.
| Counterparty | Game-markets | Avg net edge | Max net edge | Last seen | |
|---|---|---|---|---|---|
| MyBookie | 157 | 4.66% | 14.95% | Sep 20, 2026 | pair page → |
| betPARX | 121 | 3.37% | 14.52% | Sep 20, 2026 | pair page → |
| Bovada | 109 | 4.35% | 14.96% | Sep 20, 2026 | pair page → |
| Caesars | 108 | 4.09% | 14.88% | Sep 20, 2026 | pair page → |
| FanDuel | 79 | 3.39% | 14.43% | Sep 20, 2026 | pair page → |
| Fanatics Sportsbook | 70 | 4.12% | 12.05% | Sep 19, 2026 | pair page → |
| ReBet | 64 | 4.21% | 14.44% | Sep 20, 2026 | pair page → |
| Hard Rock Bet | 61 | 3.83% | 13.49% | Sep 20, 2026 | pair page → |
| DraftKings | 53 | 3.97% | 13.33% | Sep 20, 2026 | pair page → |
| ESPN BET | 44 | 3.52% | 14.95% | Sep 19, 2026 | pair page → |
| Fliff | 43 | 4.94% | 14.89% | Sep 19, 2026 | pair page → |
| Bally Bet | 30 | 2.28% | 11.11% | Sep 20, 2026 | pair page → |
Recent BetMGM arbitrage examples
Measured at detection, net of fees, at the reference stake shown. These windows have closed; they are a record of what the market did, not a recommendation.
| Game | Market | Net edge | Profit at stake | Detected |
|---|---|---|---|---|
| Miami Marlins @ San Diego Padres · MLB | total 13.5 | 0.59% | $14.71 / $2,500 | Sep 20, 12:08 AM ET |
| Miami Marlins @ San Diego Padres · MLB | total 11.5 | 1.23% | $30.86 / $2,500 | Sep 19, 11:38 PM ET |
| New York Yankees @ Arizona Diamondbacks · MLB | total 7.5 | 0.72% | $17.99 / $2,500 | Sep 19, 11:38 PM ET |
| Minnesota Twins @ Los Angeles Angels · MLB | spread 2.5 | 1.93% | $48.19 / $2,500 | Sep 19, 11:22 PM ET |
| Seattle Mariners @ Colorado Rockies · MLB | spread 1.5 | 0.84% | $21.08 / $2,500 | Sep 19, 11:07 PM ET |
| San Francisco Giants @ Los Angeles Dodgers · MLB | total 12.5 | 3.89% | $97.19 / $2,500 | Sep 19, 10:52 PM ET |
| Washington Nationals @ St. Louis Cardinals · MLB | moneyline | 14.38% | $359.48 / $2,500 | Sep 19, 10:52 PM ET |
| Minnesota Twins @ Los Angeles Angels · MLB | moneyline | 13.19% | $329.79 / $2,500 | Sep 19, 10:21 PM ET |
| New York Yankees @ Arizona Diamondbacks · MLB | moneyline | 14.95% | $373.68 / $2,500 | Sep 19, 10:21 PM ET |
| San Francisco Giants @ Los Angeles Dodgers · MLB | total 7.5 | 0.25% | $6.23 / $2,500 | Sep 19, 9:51 PM ET |
| Miami Marlins @ San Diego Padres · MLB | total 12.5 | 3.22% | $80.51 / $2,500 | Sep 19, 9:51 PM ET |
| Miami Marlins @ San Diego Padres · MLB | moneyline | 3.36% | $84.11 / $2,500 | Sep 19, 9:51 PM ET |
Frequently asked questions
What is BetMGM's vig?
Over the last 30 days BetMGM's measured overround is 4.96% across all lines we recorded — 4.45% on moneylines, 4.65% on spreads and 5.58% on totals. That ranks #14 of 21 US books we scan (lower is cheaper).
Is BetMGM a low-vig sportsbook?
Relative to the 21 books we measure, yes: its 4.96% overall margin is below the field average of 5.11%.
Which books disagree with BetMGM most often?
MyBookie — 157 game-markets in 30 days where the two books quoted the same line at prices that summed to less than 100%, averaging a 4.66% net edge. Next: betPARX (121).
How is this measured?
For every line BetMGM posted that our scanner ingested, both sides' odds are converted to implied probabilities and summed; the excess over 100% is the overround. Figures are weighted by lines observed and averaged over 30 days. Nothing here is estimated — every number traces to recorded lines.
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