Definition
The weight of the revenue-producing or mission-related load carried by an aircraft. In light general aviation use, payload is the combined weight of passengers, baggage, and cargo — that is, useful load minus usable fuel.
Plain English
The weight of the people and stuff you’re actually carrying — passengers, bags, and cargo — once fuel is set aside.
Context Anchor
Used during preflight weight and balance calculations when deciding how many people, bags, or cargo the airplane can safely carry.
Derivation
From 'pay' (the part of the load you’re paid to carry, or that justifies the flight) plus 'load.' Originally a shipping and trucking term, it carried over into aviation to distinguish the productive load from the fuel and the airplane itself.
Why Pilots Care
Directly affects whether the aircraft remains within its maximum gross weight and can meet required takeoff and climb performance.
Intuition Check
Payload does not mean every weight in the airplane. In this context, it means the people, baggage, and cargo being carried; fuel and the airplane’s own empty weight are counted separately.
Example Sentence 1
With full tanks, the airplane’s remaining payload was only 380 pounds, so one passenger had to stay behind.
Example Sentence 2
Reducing the payload by leaving behind nonessential cargo allowed the aircraft to meet the required takeoff distance on the short runway.