When should a pilot call ground control after landing?

A pilot should call ground control after landing when the aircraft is completely clear of the runway because this ensures that the aircraft is safely off the runway where landing and takeoff operations are conducted. Calling at this point allows ground control to manage the traffic flow on the airfield more effectively and reduces the risk of runway incursions or conflicts with other aircraft that may be preparing to land or take off.

Additionally, the clearance from the runway before contacting ground control means that the pilot can focus on the necessary communication without distraction, ensuring safety and efficiency. This standard procedure is vital in busy airport operations where multiple aircraft are interacting with ground control simultaneously.