The core rule

Goaltending is called when a defender touches the ball while it is on its way down toward the basket, while it is above the rim level and could still enter the basket, or after it has touched the backboard during a shot attempt. When any of these happen, the basket counts automatically as if it had gone in.

Violation: Blocking a shot while the ball is still rising, even if it's close to the rim, is not enough on its own. If the ball hasn't started its downward arc, it's a legal block.

The three conditions, broken down

A shot attempt is goaltending if any of the following is true at the moment of contact:

Basket interference vs. goaltending

Goaltending applies to shot attempts. A related violation, basket interference, covers other situations, like touching the ball while it’s within the cylinder directly above the rim, grabbing the rim to affect the ball’s position, or touching a ball that is sitting on the rim. Both result in the same penalty: the basket is awarded automatically.

Why the rule exists

Without a goaltending rule, extremely tall or high-jumping defenders could simply swat away any shot near the rim regardless of trajectory, which would make finishing at the basket nearly impossible against elite shot blockers. The rule preserves the value of a well-placed shot that’s already destined to go in. Updated