16 septembre 2026
Spread Betting: What a -7 Spread Means and How It Pays
Spread betting explained: what -7 and +7 mean, why 3 and 7 matter in the NFL, how the half point stops a push, and the margin inside every price.
Forget who wins for a second. A spread bet is about by how much. The favourite has to win by more than a number the book sets, and the underdog can lose by less than that number and still pay you. That's the whole trick, and it's why a mismatch in the NFL can be priced near evens on both sides.
One thing to clear up first. In the UK, spread betting also means a financial product where you win or lose more with every point, and that's not what this page is about. We're talking about the sports version, which American books call the point spread and our board simply lists as a handicap.
What does a spread of -7 mean?
Minus is the favourite. Plus is the underdog. Picture Kansas City at -7 with Denver at +7. Kansas City backers need an eight-point win, at least. Denver backers? They're happy with a Denver win and fine with a narrow defeat too, anything up to six.
And if it finishes exactly seven apart? Nobody wins. It's a push, and your stake comes straight back.
Run three final scores through it and it clicks. Kansas City 27, Denver 17: ten points clear, and the -7 ticket gets paid. Knock three off that and it's 27-20, exactly seven, so everyone gets refunded and nobody's especially happy about it. Make it 24-20, though, and Denver's +7 wins even though Denver went home beaten.
That last one is why people like underdogs on the spread. You can call the winner wrong and still collect.
How a spread bet pays
The spread decides the margin. What you actually get paid comes from the small number printed next to it, and it's almost never a tidy even-money price. Most US books default to -110 on each side. Put up $110, win $100. Decimal readers will see something like 1.91.
Theory only goes so far. This is what our board had up on 16 September for Buffalo v Detroit (the game was the next night, and overtime counted):
Buffalo -5.5 paid 1.92 and Detroit +5.5 paid 1.84. In American terms that's near enough -109 and -119.
Then the flat five, with Buffalo -5 at 1.87 and Detroit +5 at 1.89, where a five-point Buffalo win just gets you your money back.
And Buffalo -4.5 at 1.83 (Detroit +4.5 at 1.93). Here a five-point win is plenty, so Buffalo got more expensive.
See the pattern? The easier the cover, the shorter the price. Needing five points is easier than needing six, so Buffalo -4.5 pays 1.83 while -5.5 pays 1.92.
Payouts are multiplication, nothing clever. $50 on Detroit +5.5 at 1.84 comes back as $92 if it wins. That's your fifty and $42 on top. American odds flip the logic around. Minus numbers tell you what to risk for $100 of profit, so -110 means $110. Plus numbers tell you the profit on a $100 bet, so +150 makes $150.
The margin inside every spread
Every price hides a probability, and getting it out takes one division: 100 over the decimal odds. For 1.92 you get 52.1%. For 1.84, 54.3%. Add them together and you're at 106.4%, which can't be right for two outcomes unless somebody is taking a cut.
Somebody is. Those extra 6.4 points are the book's margin, the price of having a market at all. Two -110 prices come to about 104.8%, so you need to hit around 52.4% of -110 bets just to stay level. If you'd like to strip the margin out and see the fair price underneath, our piece on what the vig is walks through it.
None of that makes spreads a mug's game. It just means a hunch that's really a coin flip bleeds slowly, so have an actual reason before you bet a line.
Why the half point matters
Whole-number spreads can push. Spreads ending in .5 can't, because nobody scores half a point, and that half point has a name: the hook.
It's small but it changes the bet. Take Buffalo -5, where a five-point win hands your money back. At -5.5 the same result is a loser. On our board, going from -5.5 down to -4.5 knocked the price from 1.92 to 1.83, so moving the line your way isn't free.
Key numbers: why 3 and 7 move NFL spreads
Football points come in threes and sevens, so final margins pile up on those numbers. Over long stretches of NFL results, something like 15% of games end with a gap of exactly three and roughly 9% with exactly seven. Field goals and converted touchdowns see to that.
So a line that shifts from -2.5 to -3.5 has crossed the most common result in the sport, while a move from -8.5 to -9.5 crosses hardly anything. Same half point, very different bet.
Two habits come out of this:
Don't treat -3 like -3.5. The favourite at -3.5 needs a four-point win, and an awful lot of games stop at three.
On the underdog, care about the hook. +3.5 cashes on every three-point loss that +2.5 doesn't, and those come round most weeks.
Basketball's different. Points arrive so often that no one margin dominates, so an NBA half point still matters, just not as much at any single number.
Spread or moneyline?
The moneyline only asks who wins. That same Buffalo v Detroit game had Buffalo at 1.42 and Detroit at 2.80 on our board. Back Buffalo there and $100 makes you $42, which isn't much for a side that still has to go out and win.
The spread evens things up. You take a view on the margin, and both sides pay somewhere near evens.
The moneyline makes more sense when you fancy the underdog to win outright. Detroit +5.5 would pay on a Detroit win too, but 2.80 pays a lot more.
The spread suits you if you rate the favourite but think 1.42 is too short, or you expect the underdog to stay close and lose anyway.
Neither one is better value by default. Both markets on that game carried roughly the same 6% margin.
Spreads in other sports
You'll bump into spreads everywhere once you know the shape. Hockey calls it the puck line and nearly always sets it at 1.5 goals; baseball's run line sits at 1.5 runs as well. Outside the US, football uses handicaps, with Asian lines going down to quarter goals. Esports books offer map and round handicaps.
On Jacks Club every version sits under Handicap in the market list. The basketball board has NBA point handicaps that behave just like the NFL examples here, and our NBA betting guide gets into totals and props for when the season tips off.
How to bet a spread at Jacks Club
Start on the American football board, or pick any sport from the sportsbook. NFL games show "Handicap (incl. overtime)" on the main tab, and there's a Handicaps tab with every line, first-half and quarter handicaps included.
Read the market name first. "Incl. overtime" means the score after overtime is the one that counts.
Choose a line, not just a team. Buffalo -4.5, -5 and -5.5 were three separate bets at three separate prices.
Prefer American odds? Switch Odds Format at the bottom of the sportsbook from decimal to American.
One game is a Single. Add a second game and the betslip gives you a Combo, and our parlay guide shows what that does to the price.
Stakes show in dollars on the betslip, funded from whatever you've deposited: Bitcoin, USDT or one of the other coins we accept. If a bet won't settle for a few days, holding a stablecoin keeps its dollar value where it was. For season-long markets, the NFL betting guide goes further.