What Do Plus Minus Odds Mean in Betting?
You see Chiefs -150 and Bills +130 on the screen five minutes before kickoff, and if you’re new to betting, that plus-minus format can look like code. The short answer to what do plus minus odds mean is this: the minus sign shows the favorite, the plus sign shows the underdog, and the number tells you how much you need to risk or how much you can win.
Once that clicks, NFL betting gets a whole lot easier. Moneylines, point spreads, and even some futures all use this format at online sportsbooks, so understanding it helps you read the board faster and avoid guessing with your bankroll.
What do plus minus odds mean?
American odds use plus and minus numbers to show two things at once: who is expected to win and what your payout will be. A team with minus odds is the favorite. A team with plus odds is the underdog.
If a team is listed at -150, you need to bet $150 to win $100 in profit. If a team is listed at +150, a $100 bet wins $150 in profit. Your original stake also comes back if the bet wins.
That is the part most beginners need to keep straight. Minus odds tell you how much you must risk to win $100. Plus odds tell you how much you win if you risk $100.
This is why favorites pay less and underdogs pay more. Sportsbooks are pricing in probability. The team expected to win more often gives you a smaller return. The team expected to lose gives you a bigger payout because the risk is higher.
How minus odds work on NFL bets
Let’s keep it simple. If the Eagles are -200 on the moneyline, they’re favored to win. That number means you must risk $200 to profit $100.
If you only want to bet $20, that’s fine. You do not have to bet the full number shown. At -200, a $20 wager would win $10 in profit. At -150, a $20 wager would win about $13.33. The number is just a pricing formula, not a minimum bet amount.
Minus odds usually show up when one team is stronger, healthier, at home, or facing a backup quarterback. In the NFL, favorites are common, but because football has so much week-to-week volatility, even strong teams often sit in a fairly reasonable range compared with other sports.
A heavy favorite might be -300 or lower. A slight favorite might be -120. That difference matters. At -120, you’re laying a modest price. At -300, you’re risking a lot to make a little, so you need to be more selective.
How plus odds work on NFL bets
Now flip it around. If the Bears are +170, they’re the underdog. A $100 wager would return $170 in profit if they win outright.
If you bet $25 at +170, you’d profit $42.50. Bigger plus numbers mean bigger payouts, but also a lower implied chance of winning.
This is where casual bettors sometimes get pulled in too easily. A juicy underdog payout looks great on paper, especially on a Sunday packed with games. But a nice return does not automatically mean good value. Some dogs are live. Others are just priced high because they’re legitimately overmatched.
The smart move is to separate payout from probability. A line of +110 and a line of +300 are both underdogs, but they tell very different stories about the game.
A quick NFL example of plus and minus odds
Say the market looks like this:
49ers -180 Seahawks +155
The 49ers are favored. If you bet $180 on San Francisco and they win, your profit is $100. If you bet $100 on Seattle and the Seahawks win, your profit is $155.
You can also scale those numbers down to whatever fits your bankroll. A $10 bet on the 49ers at -180 wins about $5.56. A $10 bet on the Seahawks at +155 wins $15.50.
This is why many new bettors like underdogs at first. You risk less to win more. The trade-off, of course, is that underdogs lose more often.
What do plus minus odds mean for probability?
Odds are not just payouts. They also hint at how likely a result is. This is called implied probability.
You do not need to be a math major to use it, but it helps to understand the basic idea. Lower minus numbers and bigger plus numbers suggest a less likely outcome. Stronger minus numbers suggest a more likely one.
For example, -200 implies a better chance of winning than -120. Likewise, +200 implies a lower chance of winning than +110.
Sportsbooks build in a margin, so these percentages are not perfect predictions. Still, they are useful for line shopping and value betting. If you think an underdog has a better chance than the odds suggest, that may be a good betting opportunity. If the favorite looks overpriced, it might be a pass even if you expect them to win.
That distinction matters. Picking winners is not the same thing as picking profitable bets.
Where you’ll see plus minus odds most often
The most common place is the moneyline, where you’re simply betting on which team wins the game. But plus and minus odds also show up in other NFL markets.
Point spread bets are often priced at something like -110 on both sides. In that case, the number next to the spread is not telling you which team is favored on the field. The spread itself does that. The -110 is the price to place the wager.
For example, Cowboys -3 (-110) vs. Giants +3 (-110) means Dallas is favored by 3 points, and either spread bet costs $110 to win $100.
You’ll also see plus-minus pricing on totals, player props, same-game parlays, division futures, and Super Bowl odds. Once you understand the format, it carries across the whole board.
Why odds move before kickoff
A team might open at -140 and move to -170 by Sunday morning. That does not mean the sportsbook changed its mind for fun. Odds move because of betting action, injury news, weather, matchup information, and market reactions across multiple books.
If a star quarterback is ruled out, the line can swing fast. If public money floods in on a popular favorite, the price may rise. This is another reason learning plus and minus odds matters. You are not just reading a number. You are reading the market.
For NFL bettors, timing can make a real difference. Taking +3.5 instead of +3, or grabbing a moneyline at +145 before it drops to +120, can improve long-term results without changing which teams you like.
Common beginner mistakes with plus minus odds
The biggest mistake is thinking minus odds are bad because the payout is smaller. Favorites can still be strong bets if the price is fair. The second mistake is assuming all plus-money bets are worth taking because they pay more.
Another common issue is confusing profit with total payout. If you bet $100 at +150, your profit is $150, but your total return is $250 because you also get your $100 stake back.
New bettors also sometimes ignore bankroll discipline when betting favorites. Laying -250 over and over can get expensive if you chase losses or stack too many heavy favorites into parlays. A team can be the better side and still be a poor price.
How to use plus minus odds more confidently
Start by asking two simple questions every time you look at a line. First, who is the favorite or underdog? Second, what does the price mean for my actual payout?
Then go one step further and ask whether the number feels fair. If you like a favorite, are you comfortable paying that price? If you like an underdog, do you believe they win often enough to justify the risk?
This is where a good sportsbook experience matters. Clear betting boards, fast updates, and competitive NFL lines make it easier to compare prices and avoid bad numbers. That is one reason sites like NFL-Online-Betting.com focus so much on trusted sportsbook options and odds education for newer players.
The more you read lines, the more natural they become. After a while, +135, -110, and -180 stop looking like random symbols and start looking like information you can use.
If you remember nothing else, remember this: minus odds mean you’re backing the favorite and risking more to win less, while plus odds mean you’re backing the underdog and risking less to win more. Once you can read that at a glance, you’re no longer betting blind on Sunday.