Line shopping in sports betting means checking the same bet at more than one sportsbook and taking the best number or price available, because books set and move their lines separately. Between -110 and -105, that difference is $4.33 on every winning $100 bet. In the NFL, 46 of the 2025 season’s 286 games were decided by exactly 3 points, which is where half a point matters most.
Why the same bet carries different prices
Each book sets its own number and its own price. It moves them on its own action and its own view of the game, and it does not wait for the others. So at any given moment the same side can sit at -110 at one book and -105 at another, or at -3 at one and -2.5 at another. Those are examples, not prices read from any book.
A book has two levers: the number and the price. When money piles onto one side, it can move the number off -3, or it can keep -3 and charge more for it. As an example, a favourite at -3 (-120) needs a 54.55% win rate to break even, against 52.38% at -110. Our line movement guide covers why lines move. This page covers what the gap costs us.
What 10 cents is worth
The standard betting line is -110, and on a $100 stake a win there pays $90.91 in profit. At -105 the same win pays $95.24. That is $4.33 more per win, for the same pick and the same result. Run any price through the odds calculator and the pattern holds.
Does 10 cents move the break-even? It does. At -110 we need to win 52.38% of our bets. At -105 we need 51.22%, a gap of 1.16 points. That gap is paid for by nothing except where we placed the bet.
Here is the same record of 100 bets of $100 each, priced three ways:
| Win rate | Record | Profit at -115 ($) | Profit at -110 ($) | Profit at -105 ($) |
|---|---|---|---|---|
| 52% | 52-48 | -278.26 | -72.73 | 152.38 |
| 53% | 53-47 | -91.3 | 118.18 | 347.62 |
| 55% | 55-45 | 282.61 | 500 | 738.1 |
Look at the 52% row. The same 52 winners lose $72.73 at -110 and make $152.38 at -105. The picks did not change. The price turned a losing season into a winning one.
At 53% the gap is wider: $118.18 at -110 against $347.62 at -105, a difference of $229.44 over 100 bets. At -115 that same 53-47 record finishes in the red. A bettor who picks well and pays too much can still finish behind.
What half a point is worth
Half a point is worth only as much as the games that land on it. A spread of -2.5 against -3 matters when the favourite wins by exactly 3, and almost never otherwise. Our guide to what the spread means in betting has the basics. The question here is how often each number came up.
In the 2025 NFL season (286 games with a final score: 272 regular season and 14 playoff, from ESPN), 46 games were decided by exactly 3 points. That is 16.1%. Another 26 games, or 9.1%, were decided by exactly 7. The next most common margins were 4 (19 games), then 1 and 17 (16 games each).
| Final margin | Games (2025 NFL season, 286 games) | Share of games |
|---|---|---|
| 1 | 16 | 5.6% |
| 2 | 15 | 5.2% |
| 3 | 46 | 16.1% |
| 4 | 19 | 6.6% |
| 6 | 11 | 3.8% |
| 7 | 26 | 9.1% |
| 10 | 10 | 3.5% |
| 14 | 12 | 4.2% |
| 17 | 16 | 5.6% |
Of the 282 games of the 2025 season that had a pre-game line, the favourite won by exactly 3 in 17. That is 6.0%. In those games a bet on the favourite at -2.5 won, and at -3 it was a push. A bet on the underdog at +3.5 won them too, and at +3 it pushed.
So half a point across 3 or 7 is worth far more than half a point across 10. A margin of exactly 10 came up in 10 games of the 2025 season, 3.5%. Spend the attention at 3 and 7.
Totals spread out more. In the 2025 NFL season (286 games), the most common combined score was 44, in 13 games (4.5%). Then came 47 and 51, with 12 games each. Even the busiest total landed in 4.5% of games, against 16.1% for a margin of 3, so on totals we chase the price harder than the number.
How to do line shopping in sports betting
Decide the bet first. Then compare the number and the price across books, and take whichever combination is better. Shopping is for the price of a bet we already want. It is never a reason to want one. A side that does not win 52.38% of the time at -110 does not become a bet because somebody else has it at -105.
Which matters more, the number or the price? Near 3 and 7 in the NFL, the number usually does: those margins covered 46 and 26 of the 2025 season’s 286 games. Away from them, the price does. And the price matters on every bet, whatever the sport: $4.33 per $100 winner between -110 and -105, every time it comes in.
The same arithmetic runs through moneyline bets. An even-money price (+100) needs a 50.0% win rate to break even. At +105 it needs 48.78%. If how betting odds work is still new, start there.
On totals, compare the main line at each book, not one book’s main line against another’s alternate. Alternate total points are a book’s own menu of numbers at different prices, and each alternate number carries its own price. Moving a total off 44 was worth more than most in the 2025 season, when 13 of 286 games finished there.
Then write down the price taken. Not the price seen, the price taken. Over a season, -105 instead of -110 is $4.33 per $100 winner, and nobody remembers that unless it is on paper.
Why we record the price on every pick
The gain only shows up over many bets. The $229.44 between -110 and -105 at a 53% win rate took 100 bets of $100 to appear. Over a weekend, the price will look like noise. That is exactly why we track it. Our guide to EV betting explains how price and win rate combine, and staking in units keeps the comparison honest from bet to bet.
Our predictions state the book and the read time of every price we quote, so the number a pick was made at is always on the page. Find them for the NFL and the NBA. Bet within limits you set before the first game, and our responsible gambling guide covers deposit, loss and time limits, and self-exclusion.
Sources: our calculations on American odds; final scores and pre-game lines of the 2025 NFL season (286 games) from ESPN, read 7 October 2026.