What Is a Prop Bet? A Bet on Something Inside the Game
A prop bet is a wager on something that happens inside a game rather than on who wins it: a quarterback’s passing yards, the first team to score, whether there is a safety. You can win a prop on a team that loses by 30, because the only thing graded is the event you picked.
Props come in four kinds, game, team, player and exotic, and they are priced with the same odds as any other bet. This guide covers each kind, how to read the price, and the habits that separate a considered prop from a guess.
The four kinds of prop
- Game props: an event in the game itself. Will there be a safety? Will the game go to overtime?
- Team props: one team’s numbers, such as its first-half points or whether it scores first.
- Player props: one player’s line, such as over or under 245.5 passing yards or two or more made threes.
- Exotic props: things around the game rather than in it, most often at the Super Bowl: the coin toss, the length of the national anthem, the color of the drink poured on the winning coach.
Here is how a small player-prop board might look for one NFL game. The lines are an example, not prices from a book.
| Prop | Line | Price |
|---|---|---|
| Quarterback passing yards | Over 245.5 | -115 |
| Quarterback passing yards | Under 245.5 | -105 |
| Running back rushing yards | Over 68.5 | -110 |
| Anytime touchdown, wide receiver | Yes | +140 |
The passing-yards pair adds up to more than a fair coin flip: -115 implies 53.5% and -105 implies 51.2%, 104.7% between them. The 4.7 points over 100 is the book’s margin, and it is what you pay on every bet at that price.
Reading prop odds
Prop prices work the same as any other price. A plus number is the profit on a $100 bet, so +140 pays $140 profit and returns $240. A minus number is what you stake to win $100, so -115 means $115 to win $100.
Decimal odds show the total return on a $1 stake, stake included: 2.40 is the same price as +140, and $50 at 2.40 returns $120. Fractional odds show profit against stake, so 7/5 is also +140. Our guide to how betting odds work goes through the conversions.
To turn a price into a chance: for a plus price, divide 100 by the price plus 100, so +140 is 100/240, or 41.7%. For a minus price, divide the price by the price plus 100, so -115 is 115/215, or 53.5%. A prop is worth betting only when you rate the chance higher than that.
Habits that make props bettable
Shop the line, not just the price. One book may have a receiver at 58.5 yards and another at 55.5, and three yards matter more than a few cents of juice when the player’s median is close to the number.
Read the injury report and the forecast before you bet. A starting tackle out, or 20-mile-an-hour wind, changes what a quarterback’s yardage line should be, and the line you bet was set before either was known.
Look at how the player is used, not only what he produced. Snaps, targets, carries and minutes tell you whether a big game last week was a role or a fluke. A receiver who caught 9 of 9 targets had a good day; one who saw 14 targets has a role.
Treat the exotic props as entertainment. A coin toss is a 50% event, so any price below +100 on your side leaves no edge, only the margin to pay. Our Super Bowl coin toss page covers that market.
Where props are deepest
Football has the widest prop boards, and the biggest single slate of them comes on Super Bowl Sunday. Super Bowl LXI is on February 14, 2027, at SoFi Stadium, and our Super Bowl prop betting guide covers that board. For the weekly NFL markets, see the NFL player props guide.
Basketball props follow minutes, so check who is resting before you bet a starter’s points. Baseball props follow the pitcher and the lineup card, and the lineup is posted only a few hours before first pitch. Some books also post props on award shows and elections; our political betting guide covers those markets.
Our NFL predictions and NBA predictions hubs list the games we are calling. To compare books before you shop a line, start with our sportsbook reviews, and read our handicapper reviews before paying anyone for picks.