Understanding the NBA Shot Clock
The shot clock is one of the most important rules in professional basketball. It limits the amount of time a team can possess the basketball before attempting a field goal, preventing teams from holding the ball indefinitely and encouraging continuous offensive play.
In the NBA, a team normally receives 24 seconds to attempt a shot after gaining possession. Certain situations, including an offensive rebound after a missed shot that touches the rim, result in a 14-second shot clock rather than a new 24-second possession.
The 24-second clock was introduced for the 1954-55 NBA season and fundamentally changed how the game was played. Before its introduction, teams could stall for long periods, resulting in unusually low-scoring games and slower offensive possessions.
This page explains NBA Rule No. 7 using the current official rulebook as its primary reference. It replaces older NBAHoopsOnline wording that described shot-clock reset procedures no longer in effect.
Section I — Definition
The shot clock is the timing device that displays how much time a team has remaining to attempt a field goal.
The standard NBA shot clock begins at 24 seconds unless a specific rule requires a different amount of time.
When the shot clock reaches 4.9 seconds, the display also shows tenths of a second to help players and officials determine how much time remains.
A shot must leave the shooter's hand before the shot clock expires and subsequently touch the basket rim, unless the attempt is successful. Merely releasing the ball before the buzzer is not enough if the shot misses the rim.
Section II — Starting and Stopping the Shot Clock
1. Beginning a Possession
The shot clock starts when a team gains possession of a live ball. Following a jump ball or missed free throw, it starts when a team obtains possession.
2. Throw-Ins
On a throw-in, the shot clock starts when a player legally touches the ball on the playing court. The clock does not begin simply because the inbounding player releases the ball.
3. Legal Field Goal Attempts
To satisfy the shot-clock requirement, a field goal attempt must meet both conditions:
- The basketball leaves the shooter's hand before the shot clock expires.
- The ball subsequently touches the basket rim or enters the basket.
4. Team Possession
A team is considered to possess the basketball while a player is holding, passing or dribbling it. If a defensive player deflects the ball without gaining possession, the offensive team's shot clock continues to run.
5. When Possession Ends
For shot-clock purposes, team possession ends when the ball hits the offensive team's basket rim or an opposing player gains possession.
6. Defensive Deflections and Out-of-Bounds
If a defender knocks the ball out of bounds without gaining possession, the offensive team generally retains only the time remaining on its shot clock. The deflection does not automatically create a new possession.
7. Final Seconds of a Period
When 24 seconds or less remain in a period, the shot clock normally does not operate following a change of possession. However, qualifying situations requiring a 14-second reset can reactivate the shot clock.
8. Shot-Clock Decisions
Officials determine whether a legal shot was attempted before the clock expired. When permitted under NBA replay rules, video review can be used to help resolve timing and rim-contact questions.
Section III — Putting the Ball in Play After a Violation
A shot-clock violation occurs when the offensive team fails to attempt a legal field goal within the time allowed.
A common example occurs when a player releases the basketball just before the shot-clock buzzer but the shot misses the rim. Because the attempt did not contact the rim, the offense has not satisfied the shot-clock requirement.
When a shot-clock violation is called, possession is awarded to the opposing team for a sideline throw-in near the location where play was stopped, but no nearer to the baseline than the free throw line extended.
A defensive deflection alone does not prevent a shot-clock violation. The defensive team must actually gain possession or another applicable rule must interrupt the count.
Section IV — Resetting the NBA Shot Clock
Not every stoppage results in a new 24-second clock. Depending on the circumstances, the clock may reset to 24 seconds, reset to 14 seconds, remain unchanged, or be increased to 14 seconds if less time remains.
| Game Situation |
Shot-Clock Ruling |
Explanation |
| Opponent gains possession |
24 seconds |
A change of possession creates a new standard possession. |
| Offensive rebound after a missed shot that hits the rim |
14 seconds |
The original offensive team receives a shorter possession. |
| Offense gains possession after a missed live free throw |
14 seconds |
The offensive team receives a 14-second clock after gaining the rebound. |
| Defensive personal foul; offense inbounds in backcourt |
24 seconds |
A backcourt inbound after the applicable defensive personal foul resets the clock. |
| Defensive personal foul; offense inbounds in frontcourt |
14 seconds or time remaining, whichever is greater |
Subject to the special offensive-rebound sequence exception. |
| Defensive three-second violation |
14 seconds or time remaining, whichever is greater |
The offense does not automatically receive 24 seconds. |
| Defensive kicked or punched ball; frontcourt inbound |
14 seconds or time remaining, whichever is greater |
The offense retains at least 14 seconds. |
| Defender deflects ball out of bounds |
Time remaining |
A simple deflection does not automatically reset the clock. |
| Shot misses the rim and offense retrieves ball |
Time remaining |
The missed attempt does not reset the clock. |
| Offensive technical foul or delay-of-game warning |
No automatic reset |
The clock is not reset merely because of this event. |
| Flagrant or punching foul |
24 seconds |
These fouls have a specific reset provision. |
| Offense retains possession after ball goes out of bounds immediately following a rim-contacting miss |
14 seconds |
A special reset applies to this offensive-rebound sequence. |
When the Clock Resets to 24 Seconds
The NBA's standard 24-second reset applies to a change of possession, qualifying backcourt fouls and violations, certain jump-ball situations, and flagrant or punching fouls.
When the Clock Resets to 14 Seconds
A 14-second reset applies when the offensive team first gains possession following an unsuccessful field goal attempt that touches the rim or a missed live free throw. Certain immediately related loose-ball fouls and out-of-bounds situations also receive 14 seconds.
When the Clock Remains the Same or Increases to 14
For specified defensive infractions, such as a frontcourt defensive personal foul or defensive three-second violation, the shot clock remains at its existing time if 14 seconds or more are left. If fewer than 14 seconds remain, it is reset to 14.
When the Clock Does Not Reset
The clock generally does not reset because of a simple defensive deflection out of bounds, an offensive technical foul, a shot that fails to hit the rim, or a held-ball jump ball caused by the defense.
This is a practical summary of NBA Rule No. 7. Certain special circumstances and exceptions are addressed in the complete official rulebook.
Examples of NBA Shot-Clock Situations
| Example |
Result |
| A team misses a shot that hits the rim and grabs its own rebound. |
The shot clock resets to 14 seconds. |
| A team has 8 seconds left when a defender commits an ordinary personal foul that results in a frontcourt throw-in. |
The clock normally resets to 14 seconds. |
| A team has 19 seconds left when a defender commits an ordinary personal foul that results in a frontcourt throw-in. |
The clock normally stays at 19 seconds. |
| A defender tips the ball out of bounds with 6 seconds left. |
The offense retains the ball with 6 seconds left. |
| A shot leaves the shooter's hand before the buzzer but misses the rim. |
A shot-clock violation occurs unless another applicable event changes the ruling. |
| A team steals the ball and establishes possession. |
A new 24-second clock begins. |
History of the NBA's 24-Second Shot Clock
The NBA introduced the 24-second shot clock in the 1954-55 season, a change closely associated with Syracuse Nationals owner Danny Biasone and general manager Leo Ferris.
Before the shot clock existed, teams could hold the basketball for extended periods, particularly when protecting a lead. This allowed stalling tactics that sometimes produced extremely low-scoring games and frustrated spectators.
The most famous example occurred on November 22, 1950, when the Fort Wayne Pistons defeated the Minneapolis Lakers 19-18. The 37 combined points remain the lowest-scoring game in NBA history and are frequently cited as an example of the problems created by unlimited possessions.
The 24-second limit was developed using the approximate number of field goal attempts in a typical game. Dividing the 2,880 seconds in a 48-minute game by roughly 120 combined shot attempts produced a target of 24 seconds per attempt.
The change dramatically increased the pace of professional basketball. Teams could no longer protect a lead simply by holding the ball, and offenses had to organize their possessions more efficiently.
The shot clock became one of the defining features of modern NBA basketball and influenced the adoption of possession limits in other basketball leagues around the world.
Important Shot-Clock Rule Changes
| Season |
Change |
| 1954-55 |
The NBA introduced the 24-second shot clock. |
| 2018-19 |
The NBA adopted the 14-second reset following qualifying offensive rebounds, replacing the former full 24-second reset. |
Frequently Asked Questions
How long is the NBA shot clock?
The standard NBA shot clock is 24 seconds. Certain situations, particularly offensive rebounds, result in a 14-second reset.
When was the 24-second shot clock introduced?
The NBA introduced the shot clock for the 1954-55 season.
Does hitting the backboard reset the shot clock?
No. A shot must touch the basket rim to satisfy the shot-clock requirement. Hitting only the backboard is not sufficient.
Does an offensive rebound reset the shot clock to 24 seconds?
No. Under the modern NBA rules, a qualifying offensive rebound results in a 14-second reset.
Does a defensive foul always reset the shot clock?
No. The result depends on the foul and where play resumes. Some defensive fouls reset the clock to 24 seconds, while others leave the existing time or increase it to 14 seconds.
Does the shot clock stop when the ball goes out of bounds?
Yes, but stopping the clock does not necessarily mean it resets. If the offense retains possession after a defensive deflection, the time remaining generally carries over.
Official NBA Shot-Clock Rules and Sources
Explore More NBA Rules
Submit a Record or Correction
If you know of an important rule change that would make a good addition to this page, or notice an error in one of the existing explanations, please send the information.
When suggesting an addition, please include the rule, date or season involved and a reliable source when available.
Send corrections, additions and updates to:
Rednecksbasketball@yahoo.com
Submissions will be reviewed before changes are made to NBAHoopsOnline historical records.
