The vig — also called juice — is the sportsbook's built-in commission, and at the standard price of -110 on both sides of an NFL spread or total, it means you must win roughly 52.4% of your bets just to break even. That's not a rounding quirk; it's the mathematical core of how sportsbooks profit from balanced action.
What exactly is the vig?
When you see a spread listed as Chiefs -3 (-110) / Raiders +3 (-110), neither side is paying even money. To win $100, you must risk $110. The extra $10 is the vig. If the book takes $110 from each side, it collects $220 total and pays out $210 to the winner — keeping $10 regardless of the result.
Before you even study a matchup, start by learning how to read NFL bet lines step by step so the numbers on the board make intuitive sense.
Why does -110 require a 52.4% win rate?
The math is straightforward once you see it. At -110, each winning bet returns your $110 stake plus $100 profit — $210 total. Each losing bet costs $110. Over 100 bets at $110 each you risk $11,000. To finish even, you need enough wins so that (wins × $210) = $11,000. Solving: wins ≈ 52.38, or just over 52.4%.
Most beginners assume 50-50 is the hurdle. It isn't. That gap — 50% vs 52.4% — is the house edge, and it compounds quietly across a full NFL season.
How does the vig show up across different bet types?
Spread and total bets carry -110 as their standard price on both sides, but the vig can vary. Some books shade a line — pricing one side at -115 and the other at -105 — when sharp action has forced them to move the number without fully moving the market. Moneylines build vig differently: the gap between the favorite's negative price and the underdog's positive price represents the book's margin rather than a flat -110 charge.
Understanding how those prices differ across bet types connects directly to reading American vs decimal vs fractional odds in NFL betting, since the same vig looks different depending on the format your book displays.
What does the vig actually cost over a season?
Say you place 100 bets at $110 each on NFL spreads — a modest season for a regular bettor. At exactly 50% wins (50 wins, 50 losses):
- Wins: 50 × $100 profit = +$5,000
- Losses: 50 × $110 staked = −$5,500
- Net: −$500
You've picked winners half the time and still lost $500 purely because of -110 pricing. That's the vig at work. The honest way to think about it: every bet you place at -110 has an implied break-even of 52.4%, so each individual wager carries a small negative expected value before any handicapping skill enters the picture.
Can you reduce the vig's impact?
Yes, and the most direct method is line shopping — comparing the price on the same bet at multiple sportsbooks. A book offering -105 instead of -110 on the same spread meaningfully lowers your break-even to around 51.2%. Over a full season that difference adds up faster than most casual bettors expect. The practical guide to shopping NFL bet lines across DraftKings, FanDuel, and BetMGM covers exactly where those price differences appear most often.
Line movement also affects what price you get relative to the opening number. If you want to understand why the price shifts between Sunday night and kickoff, how NFL line movement drives spreads from open to kickoff explains the mechanics in detail.
Another angle is avoiding unnecessarily high-vig bets — same-game parlays and some props carry far steeper juice than standard spreads. When I map my own entertainment budget for a season, I treat the vig as a known, fixed cost per bet rather than a surprise, the same way I'd account for a service fee on a concert ticket.
The vig and responsible betting
Because the vig guarantees a small negative edge on every standard wager, NFL betting is best approached as paid entertainment rather than a reliable income source. Must be 21+ (18+ in select states). Gambling problem? Call 1-800-GAMBLER.
For a broader look at how these numbers fit into the full picture of NFL wagering — spreads, moneylines, totals, and futures — the NFL bet lines hub ties every concept together. And if you're still building your foundation, the NFL bet lines FAQ covers the most common questions about spreads, pushes, and legal wagering in plain language.
According to Responsible Gambling's NFL betting lines guide, understanding the built-in margin before you wager is one of the core habits that separates informed bettors from those who burn through their entertainment budget faster than expected.