What Is a Moneyline Bet?
The simplest bet in sports: pick who wins. The only thing that changes is the price — how much you risk to win, or how much you win on what you risk.
Favorite vs. underdog
A moneyline bet is a wager on which team or player wins outright. The margin doesn't matter — a one-point win pays the same as a blowout.
American odds tell you the price. A negative number is the favorite: it's the amount you must risk to win $100. A positive number is the underdog: it's the amount you win on a $100 risk. The bigger the number, the bigger the gap the market sees between the two sides.
Chiefs -150 vs. Broncos +130. Backing the Chiefs, you risk $150 to win $100 (total return $250). Backing the Broncos, you risk $100 to win $130 (total return $230). The Chiefs are favored, so they cost more.
Turning odds into probability
Every price implies a win probability. Convert it and you can judge whether the number is fair. A -150 favorite implies about a 60% chance to win; a +130 underdog implies about 43.5%.
Notice those add up to more than 100%. That overround is the sportsbook's vig — the built-in margin you're paying on top of the true odds.
Favorite (−): |odds| / (|odds| + 100) · Underdog (+): 100 / (odds + 100)
-150 → 150/250 = 60%. +130 → 100/230 ≈ 43.5%.
When a moneyline is the right bet
Moneylines shine when the spread doesn't matter to you — heavy favorites, or sports without spreads like tennis and fights — or when you simply disagree with the market's price on a winner.
Because all you need is the outright result, line-shopping pays off directly: the same team can be -150 at one book and -135 at another. Always take the better number.
Key takeaways
- A moneyline is a bet on the outright winner — margin is irrelevant.
- Negative odds = favorite (risk more to win $100); positive odds = underdog (win more on $100).
- Every price implies a win probability; the two sides summing over 100% is the vig.
- Shop books — a better moneyline number is free value.
Common mistakes
- Reading +250 as 'likely to win.' Plus-money means less likely, with a bigger payout to compensate.
- Ignoring the vig and assuming the implied probability is the true probability.
- Taking the first price you see instead of checking another book.
FAQ
What does a -200 moneyline mean?
Risk $200 to win $100. The implied win probability is about 66.7%.
What's the difference between a moneyline and a spread?
Moneyline: pick the straight-up winner. Spread: pick whether the favorite wins by more than the posted number of points.
Can a moneyline push?
Rarely — only in sports with a draw or a three-way line (soccer, NHL regulation). In most US markets there's always a winner, so there's no push.
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