Buying Points & Key Numbers
In football, some final margins show up way more than others. Knowing those key numbers, and when it's worth paying to move across them, is one of the sharpest little edges around.
Not all margins are equal
Football scores in 3s and 7s, so games land on certain margins way more than others. 3 is the single most common margin of victory, then 7. 6, 10, and 14 matter too. These are the key numbers, and a spread sitting right on one is worth a lot more than the half-point on either side would suggest.
What "buying points" means
Most books let you buy points, meaning you pay extra juice to move a spread in your favor. Slide a favorite from -3 to -2.5, or a dog from +3 to +3.5, and you take worse odds for a better number. You can also sell points for a better price and a worse number. The question is always whether the better number is worth the cost.
Moving a dog from +2.5 to +3.5 means that when a game lands on a field goal, which happens a ton, you flip from a loss (or a push) to a win. That one point spans the most common margin in the sport, so it's worth way more than buying from +8 to +9. Smart point-buying goes after the moves that cross 3 (and 7). Buying half-points in the dead zones between key numbers mostly just donates juice to the book.
Is it worth the price?
Books usually charge about 10 cents of juice per half-point, but they charge more to buy on and off the 3, exactly because it's so valuable. Rule of thumb: buying onto or off of 3 (and often 7) can be worth it. Buying points anywhere else is usually a slightly losing convenience. And the other way to get a better number costs nothing at all. It's line shopping, where a different book might already be posting the number you were about to pay for.
Beyond football
Key numbers are strongest in football. Basketball margins spread out more, so no single number rules, though 2, 4, 5, and 7 carry a little weight. In low-scoring sports the whole thing shifts to the moneyline. But wherever a common margin exists, knowing it, and refusing to pay across the dead zones, is a small repeatable edge.
Key takeaways
- Football margins cluster on key numbers, especially 3 and 7, so spreads on those numbers are worth extra.
- Buying points means paying more juice to move a spread. The value is in crossing key numbers, not the dead zones.
- Buying onto or off 3 (and often 7) can be worth it. Buying elsewhere usually just donates juice.
- Line shopping can hand you the better number for free, so check it before you pay to buy points.