MMA stands apart from most sports betting markets due to the sheer volatility of each contest. A single punch, kick, or submission attempt can end a fight in seconds, making outcomes inherently less predictable than in sports where scoring accumulates over extended periods. This binary nature — where a heavy favorite can be finished at any moment — creates unique value opportunities for bettors who understand fighter tendencies, stylistic matchups, and how odds reflect (or misprice) finishing ability versus decision likelihood. The market also offers meaningful depth beyond moneylines, including method of victory, round betting, and over/under on total rounds, each carrying its own margin structure.
Vig in MMA tends to run wider than in mainstream sports like NFL or NBA, particularly on fights involving heavy favorites. When a moneyline sits at -400 or beyond, sportsbooks often build in substantial margins because the perceived certainty invites lopsided action. Conversely, competitive matchups on main cards — especially at UFC pay-per-view events — tend to see tighter lines as books compete for volume and sharp action forces prices closer to true probability. Prop markets like method of victory and round betting consistently carry higher juice, making line shopping across books especially valuable in those spaces.
The UFC operates nearly year-round, with events most weekends, but vig compression is most noticeable around marquee pay-per-view cards and during stretches where multiple sportsbooks are actively competing for new customers, such as early in the calendar year or around tentpole events like UFC 300-series milestones. Key factors driving line movement include late injury news, weight-cut issues that surface during fight week, changes in training camps or coaching staff, and short-notice opponent replacements — which frequently create significant mispricings. Altitude and climate rarely matter, but cage size (smaller cages at UFC Apex versus full-size arenas) meaningfully shifts dynamics, favoring pressure fighters and grapplers in ways the market sometimes underweights.
Analysis updated October 11, 2026. Odds data above refreshes hourly.
↑ 7-day trend: MMA average vig has worsened by 0.12 percentage points over the past week (from 5.26% to 5.38%). Odds margins are widening, meaning bettors are getting less value per wager.
Cross-Sport Vig Comparison
MMA averages 5.38% vig across 15 sportsbooks. Here's how that compares to other active sports:
Vig Rankings
| # | Sportsbook | Avg Vig | Grade | ML | Spreads | Totals | Events |
|---|---|---|---|---|---|---|---|
| 1 | BetOnline.ag | 3.88% | B+ | 3.90% | — | 3.76% | 67 |
| 2 | BetUS | 4.28% | B | 4.25% | — | 4.31% | 12 |
| 3 | Pinnacle | 4.29% | B | 3.87% | — | 4.78% | 14 |
| 4 | Hard Rock Bet | 5.23% | C+ | 5.23% | — | — | 18 |
| 5 | FanDuel | 5.39% | C+ | 5.39% | — | — | 16 |
| 6 | betPARX | 5.45% | C+ | 5.45% | — | — | 27 |
| 7 | BetRivers | 5.45% | C+ | 5.45% | — | — | 27 |
| 8 | Bally Bet | 5.45% | C+ | 5.45% | — | — | 27 |
| 9 | Caesars | 5.46% | C+ | 4.90% | — | 6.25% | 17 |
| 10 | BetAnything | 5.53% | C+ | 5.66% | — | 5.41% | 12 |
| 11 | DraftKings | 5.68% | C+ | 4.29% | 7.19% | 6.26% | 18 |
| 12 | Bovada | 5.72% | C+ | 4.00% | 6.54% | 6.63% | 11 |
| 13 | 888sport | 5.87% | C+ | 5.87% | — | — | 8 |
| 14 | Fliff | 6.46% | C | 6.46% | — | — | 3 |
| 15 | ReBet | 6.53% | C | 6.53% | — | — | 24 |
Frequently Asked Questions
Which sportsbook has the lowest MMA vig?
BetOnline.ag currently has the lowest vig at 3.88%, earning a grade of B+.
Why does MMA have higher vig than team sports?
MMA is an individual sport with unpredictable outcomes — one punch can end a fight. Sportsbooks compensate for this uncertainty with wider margins. Additionally, MMA events happen weekly rather than daily, so there's less consistent volume to drive competition.
When are MMA odds available?
UFC events run nearly year-round, with numbered PPV events roughly monthly and Fight Night cards filling the gaps. Lines typically open 1–2 weeks before each event. There's no traditional off-season, though the schedule is lighter in December.
Which sportsbooks offer the best MMA odds?
Pinnacle and BetOnline are generally the sharpest for MMA due to higher limits and tighter pricing. Recreational books like BetUS and MyBookie tend to have higher vig on UFC fights. However, MMA vig across all books is typically higher than team sports.
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 every hour, on the hour (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 average vig: A+ (under 2%) is exchange-level pricing, A (2–3%) very competitive, B+ (3–4%) above average, B (4–5%) the industry standard, C+ (5–6%) slightly below average, C (6–7%) below average, D (7–8%) high vig, D− (8–10%) very high, F (10%+) predatory.
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, BetAnything). 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 every hour, on the hour (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.