The Seattle Seahawks opened as 3.5-point favorites over the New England Patriots for the 2026 NFL opener on September 9. That little number, the 3.5, is a point spread, and it decides whether a bet on Seattle pays even when the Seahawks win the game. Point spread betting is the most common way Americans wager on football and basketball, and it trips up more new bettors than any other market. The math behind it is simpler than the jargon makes it look, and one worked example is enough to get it.
What a point spread actually is
A point spread is a handicap the sportsbook attaches to the favorite. It sets a margin the favorite has to beat for a bet on them to win. The favorite carries a minus sign and gives points away. The underdog carries a plus sign and gets a head start.
Take the opener. Seattle is listed at -3.5 and New England at +3.5. Back Seattle and they need to win by 4 or more. Back New England and you win if the Patriots lose by 3 or fewer, or win the game outright. The half-point means the game cannot land exactly on the number, so one side of the bet wins and the other loses.
The spread exists to make a lopsided game worth betting on both sides. Without it, almost nobody would take the weaker team at even money.
How to read the spread
Sportsbooks post the spread next to each team with the price in parentheses. A Week 1 board might look like this:
- Los Angeles Chargers -11.5 (-110) vs Arizona Cardinals +11.5 (-110)
- Buffalo Bills -1.5 (-110) vs Houston Texans +1.5 (-110)
- Kansas City Chiefs -2.5 (-110) vs Denver Broncos +2.5 (-110)
The Chargers at -11.5 are heavy favorites, so they have to win by 12 to cover. The Bills at -1.5 are barely favored, so almost any win covers. The number itself tells you how much better the market thinks one team is. If reading the -110 price is new to you, our guide to reading sports betting odds breaks down what those numbers mean.
Covering, the hook, and pushes
Winning the game and covering the spread are two different results. A favorite can win and still lose your bet. An underdog can lose the game and still win it for you.
Say the Lions are -7 against the Saints and win 27-20. That margin is exactly 7. The bet is a push, and the sportsbook refunds your stake. Now move the line to -7.5. The same 27-20 result means Detroit failed to cover by half a point, and Lions bettors lose. That half-point is called the hook, and it is why sharp bettors fight so hard to get -7 instead of -7.5.
Pushes only happen on whole numbers. Any spread with a .5 in it produces one winner and one loser, never a tie.
The vig: why the spread is priced at -110
Both sides of a spread are usually listed at -110. That price is the vig, the sportsbook's cut. At -110 you lay $11 to win $10, so a $110 bet on the Bills -1.5 returns $100 in profit if they cover.
The vig is why you cannot simply bet both sides and break even. You need to win about 52.4% of your -110 spread bets to come out ahead, not 50%. That 2.4-point gap is the house edge baked into every spread. We pull the juice apart in the vig and juice guide, and it is the reason the number on the board is only half the bet. The price matters just as much.
Why point spread betting isn't the same at every book
The spread moves from book to book. One sportsbook might hang the Titans at -3 while another sits at -2.5, and a third prices -3 at -105 instead of -110. Those gaps are small, and they are exactly what experienced bettors hunt.
Getting -2.5 instead of -3 on a favorite can turn a push into a win. Getting +3 instead of +2.5 on an underdog does the same in reverse. Across a full season, always taking the better side of a key number is worth more than most people's best handicapping. This is line shopping, and it is the highest-return habit in betting. Our line shopping guide lays out the full method, and how sportsbooks set lines explains why the numbers drift apart in the first place.
When two books disagree far enough on both the spread and the price, the two sides can lock in a small edge whoever wins. That is the arbitrage BetSuite is built to catch. BetSuite scans sportsbooks across the US and Canada, flags where the spread and price line up in your favor, and lines up both bets for you to review. You place every bet yourself.
Point spread vs the moneyline
A moneyline bet only asks who wins, at odds that reflect how likely that is. A spread bet asks by how much. Favorites are cheaper to back on the spread because they have to do more work to cover. Underdogs are safer on the spread because the points give them a cushion.
Two spread cousins are worth knowing. A teaser lets you move the spread in your favor across several games for a smaller payout, which we cover in the NFL teaser strategy guide. Middling means betting both sides at different numbers and hoping the final result lands in between, walked through in the middling guide.
See the spread at every book at once
BetSuite compares the same point spread across sportsbooks in the US and Canada and flags the numbers worth betting. You review every bet before it's placed. No card needed to start.
Download FreePoint spread betting FAQ
What does -3.5 mean in betting?
The team at -3.5 is a 3.5-point favorite. A bet on them wins only if they win the game by 4 or more. A bet on the +3.5 underdog wins if that team loses by 3 or fewer, or wins outright. The half-point removes any chance of a tie on the bet.
Is it better to bet the spread or the moneyline?
It depends on the game. The spread gives a favorite a better price but adds the risk they win without covering. The moneyline pays less on a favorite but only asks them to win. On close games the two are nearly the same bet; on lopsided ones the spread is usually the more efficient way to back the favorite.
What happens if the game lands exactly on the spread?
That is a push, and both sides get their stake back. It can only happen on whole-number spreads like -3 or -7. Any spread ending in .5 always produces a winner and a loser.
Why is the spread -110 on both sides?
The -110 is the sportsbook's vig. It means you risk $11 to win $10, which forces bettors to hit about 52.4% to break even and gives the book its edge. Some books shade key spreads to -105 or -115, which is one more reason to compare prices before you bet.
Disclaimer: Betting involves risk and you can lose money. BetSuite is a data tool, not a sportsbook. It holds no funds and places no bets, and you give the final say on every wager. Odds and spreads move constantly, and legality varies by state and province. Bet within your means.