The Restricted Area Arc, commonly known as the charge line is the small semi-circle drawn on the basketball key directly under the basket. Whether you are a point guard driving into the key or a defender protecting the basket, understanding this line is one of the most effective ways to elevate your decision-making on the court.
Here is a complete guide to what the charge line means, how the rule works, and how players can use it strategically on both offense and defense.
1. The Official Rule
Under standard FIBA rules, the Restricted Area Arc is a semi-circle with a radius of 1.25 meters measured from the center of the basket directly below the rim.
- The Core Rule: A defensive player cannot draw an offensive charging foul while standing inside or touching this arc when an offensive player is driving to the basket, airborne, or attempting a shot or pass.
- Foot Position: If any part of the defender’s feet is touching the line or resting inside the semi-circle, they cannot draw a charge. Contact caused by a driving offensive player under control will almost always be ruled a defensive blocking foul.
- The Exception: A defender inside the arc can still draw an offensive foul if the offensive player uses illegal contact, such as clearing out with an elbow, hooking the defender, or pushing off with their hands or shoulders.
2. A Simple Way to Remember It
Think of the charge line as a No-Charge Zone for Defenders.
If a defender has any part of their feet inside or touching that curved line, they cannot take a charge. Even if the defender is standing completely still, stepping onto or inside that semi-circle means any straight-on contact during a drive will be called a blocking foul on the defense. To draw a legal charge, the defender’s feet must be established completely outside the line before the offensive player starts their upward jumping motion.
3. Offensive Strategy: How to Use the Line
For point guards and perimeter players attacking the paint, the charge line is a tool to create high-percentage scoring opportunities and draw fouls on interior defenders.
- Attack Defenders Set Inside the Arc: When driving to the rim, look at the feet of the help defender. If their heel is touching or inside the semicircle, drive straight toward your finishing angle. Because they are inside the restricted area, their static position does not protect them, resulting in a defensive foul if contact occurs on a controlled shot attempt.
- Use Change of Direction to Force Backwards Steps: Changing direction or using euro-steps can force a rim protector to retreat. If their footwork forces them onto or behind the charge line, they lose their ability to take a charge against your forward momentum.
- Challenge Tall Defenders Standing Under the Rim: Defenders who camp near the basket to block shots often rest on or inside the arc. Attacking directly into this space forces them to make a decision: jump straight up to contest the shot cleanly, or risk committing a blocking foul. This also creates dump-off passing lanes to trailing post players.
4. Defensive Strategy: Staying Safe and Legal Inside the Line
Defenders positioned inside or near the charge line must adjust their technique to guard drivers without committing unnecessary fouls.
Establish Position Early
To draw a legal charge, a defender must set their position with both feet completely outside the arc and their torso facing the ball-handler before the attacker starts their gathering motion to jump. If there is not enough time to set feet outside the line, attempting to absorb a charge inside the arc will result in a foul.
Legal Ways to Defend Inside the Arc
When caught inside the semi-circle against an airborne driver:
- Apply the Rule of Verticality: Defenders have the right to the vertical space directly above their established position. Keep both arms extended completely straight up overhead and jump straight up in the air. Avoid leaning forward, reaching toward the shooter, or bringing arms down. If a defender jumps straight up vertically inside the arc, mid-air contact is legal play.
- Step Aside and Contest from the Angle: If a driver is moving at high speed directly toward the rim and the defender is inside the arc, stepping sideways out of the direct path allows the defender to contest or block the ball from the side without absorbing direct body contact.
- Keep Hands Clear and High: Officials look for hand and arm movement when contact occurs near the rim. Keeping hands high and visible avoids giving the appearance of reaching or holding, which often leads to immediate whistles.
Quick Reference Guide
| Game Situation | Defender Position | Official Call / Outcome |
| Drive to Basket | Feet touching or inside the arc, standing still | Blocking Foul on defense |
| Drive to Basket | Feet completely outside the arc, position set early | Offensive Charge |
| Mid-Air Contest | Inside the arc, jumping straight up vertically | Legal Contest (Play On) |
| Mid-Air Contest | Inside the arc, leaning or reaching into the shooter | Defensive Foul |
| Offensive Push/Elbow | Inside the arc, offensive player pushes off | Offensive Foul |