What Is a Point Spread? Reading the Line Before Kick-off
Most games are not even contests on paper. One team is usually stronger, and a bet on that team simply to win would offer very little reward. The point spread fixes this by handing the weaker side an imaginary head start. Once that handicap is applied, the question is no longer "who wins?" but "who wins once the margin is taken into account?"
Spreads are the standard way to bet on American football and basketball, and you will also see them in rugby, ice hockey (as the puck line) and some football markets, where a similar idea appears as the handicap.
Reading the numbers
A spread is shown as a number with a minus or plus sign next to each team. Here is a hypothetical listing with invented teams:
| Team | Spread | Price |
|---|---|---|
| Lakeshore Pilots | -6.5 | -110 |
| Eastfield Rovers | +6.5 | -110 |
- The minus sign marks the favourite. A bet on Lakeshore at -6.5 wins only if they win by seven points or more.
- The plus sign marks the underdog. A bet on Eastfield at +6.5 wins if they win outright or lose by six or fewer.
- The price is separate from the spread. The -110 beside each side is the cost of the bet: stake 110 to win 100 in profit. It is a different number from the line itself, and newcomers often mix the two up.
Why the price is rarely even money
If the spread were set perfectly and both sides paid even money, the operator would earn nothing over time. Instead, both sides are typically priced a little below a fair coin flip. At -110 on each side, a bettor has to win 110 out of every 210 staked just to break even, which works out to about 52.4 per cent of bets. The gap between that figure and 50 per cent is the operator's margin, sometimes called the vig or juice.
That arithmetic is worth keeping in mind. Picking winners slightly more than half the time is not enough; over many bets the margin keeps chipping away at anyone who cannot clear it, which is most people.
Half points and the push
When a spread is a whole number, say -7, and the favourite wins by exactly seven, neither side has won. The bet is a push, and stakes are normally returned. Many lines use half points, known as the hook, precisely to rule this out: a team cannot win by six and a half, so one side must win.
The hook matters more than it looks. A line of -3 and a line of -3.5 can produce very different outcomes in a sport where three-point margins are common, which is why some operators charge a little extra to move a line across that half point.
Why the line moves
The spread you see on Monday may not be the spread on game day. Operators adjust it for several reasons:
- News. An injured starter, a weather forecast or a late change to the lineup can shift expectations about the margin.
- Money. If far more is staked on one side, the operator may nudge the line to attract bets on the other and limit its own exposure.
- Market correction. Opening lines are an estimate; as information arrives, they tend to settle.
A bet is usually settled at the line you took, not the closing one. If you backed the favourite at -6.5 and the line later moved to -8, your ticket still needs a win by seven.
Spread or moneyline?
A moneyline bet only asks who wins, with the stronger side paying less. A spread bet asks who covers the handicap, with both sides usually priced close together. Neither is better in itself. A spread is useful for understanding how the market rates the gap between two teams; a moneyline shows how likely it thinks each side is to win at all. For more on the other common market types, see our broad overview of sports betting.
Where spreads lead next
Once the basic line makes sense, several related bets become easier to follow. Alternate spreads let you choose a bigger or smaller handicap at a different price. Totals, or over/under bets, apply the same logic to combined points. And a teaser moves several spreads at once in exchange for a lower payout, which we cover in our piece on what a teaser bet is.
A few habits worth keeping
- Read the line and the price as two separate pieces of information.
- Note whether there is a hook and what a push would mean for your bet.
- Remember that a spread is the market's estimate of the margin, not a forecast that will come true.
- Decide what you are willing to spend before looking at any line, and keep to it whatever the result.
Betting on sports is an adult pastime, and it is legal in some places and not in others; check the rules that apply where you are before placing anything, and step away the moment it stops being fun.
