How to bet on the NBA
The NBA line is one of the sharpest numbers a book deals, and it gets sharper as tip-off gets near. Nobody beats it by knowing the teams better than the market does. The people who beat it know when the number is weak, and the playoffs are a different sum altogether.
A sharp number with a weak hour
The bets are the usual ones: a spread and a total at -110, a moneyline, halves and quarters, player props. If those are new, how to bet on sports starts at the beginning.
What matters more is how the number lives through the day. Most books open NBA lines the night before or in the morning, with low limits, built from a rating and an assumption about who will play. Through the day the injury news comes in, the sharp money hits the number, and the limits go up. By tip-off the line has had every piece of information the market could find, and that closing number is very hard to beat. Bettors who make money on the NBA mostly do it by betting before that, and getting a better number than the close more often than not. That is what closing line value measures, and over a season it is the best test I know of whether you're any good.
The flip side: if you bet the NBA an hour before tip with the crowd, you are betting the best number the book will deal all day. I wouldn't expect to beat it.
Who plays, and how tired
One player can be worth several points on an NBA line, which is why the injury report runs the market. The by-sport page on NBA betting sites covers how books handle the news. The part people miss is the schedule behind it.
Teams play on back-to-back nights, finish long road trips, cross time zones. Coaches rest players on those nights, and late in the season a team that has its playoff seed settled has less reason to play its stars at all. A team at the bottom of the table has less reason still to chase a win. The book prices all of this, but the rest decisions come late and the motivation is hard to put a number on. I'd read the schedule before I read the matchup.
Pace and the total
An NBA total is possessions times points per possession, for both teams. Two fast teams meeting give you more possessions; a fast team against a slow one is a fight over who sets the pace. The public bets overs, because points are fun to watch, and the book shades totals up a little for it. When I liked a total, it was usually an under.
The playoffs are a series
In the playoffs you can bet each game, or the series. The series price is the one people misread, because a best-of-seven magnifies a small edge.
Say a team wins any single game against this opponent 60 percent of the time (ignoring home court, which changes by game). Here is how often it wins the series:
| Wins a game | Wins the series | Fair series price |
|---|---|---|
| 50% | 50.0% | +100 |
| 55% | 60.8% | -155 |
| 60% | 71.0% | -245 |
| 65% | 80.0% | -400 |
| 70% | 87.4% | -693 |
A team that is only a modest favorite in each game is a big favorite to win four of seven. Better teams win series far more often than they win games, which is why backing playoff underdogs to win the series is an expensive habit.
Now say that 60-percent team loses game 1. It now needs four of the next six, and if it is still a 60-percent team, its chance is 54.4 percent, a fair price of about -119. The series price can fall from around -245 to around -119 on one game. The question to ask is whether game 1 told you something real (a matchup problem, an injury) or was just one of the 40 percent. If it was the second, the favorite's series price after a loss is the best number you'll get on it.
Rotations shorten in the playoffs, so the stars play more minutes and the bench matters less. Regular-season numbers built on bench play count for less. So does the regular-season record against this opponent, which was played with different rest, different rosters and less at stake.
The finals and the story
By the finals, everyone has a story: momentum, experience, the team that swept its way through. The public bets the story. I'd bet the number, and a team that went through a soft bracket is not better because its record looks clean.
Nothing in a long season changes the bankroll sum. An NBA game every night is a reason to be choosy, not busy: 1 or 2 percent of the bankroll on a bet, and a loss limit you set before the season starts.