Definition
As defined by the General Aviation Manufacturers Association (GAMA), payload is the weight of occupants, cargo, and baggage carried by the airplane. It is calculated as the useful load minus the weight of usable fuel.
Plain English
Payload is the weight of everything you're carrying that isn't fuel — people, bags, and cargo.
Context Anchor
Seen in airplane weight-and-balance, loading, and performance planning.
Derivation
From 'pay' (what earns revenue) and 'load' (what is carried). Originally a commercial shipping term referring to the portion of the load that actually generated income, as opposed to fuel or crew. The aviation meaning kept the same idea: the part of what's carried that the flight exists to transport.
Why Pilots Care
Directly determines takeoff distance, climb performance, and whether the aircraft stays within its certified maximum gross weight.
Intuition Check
Payload does not mean everything on board. In this context, it means the people and carried items, not the airplane itself and not the fuel.
Example Sentence 1
After fueling for the cross-country, the pilot calculated the remaining payload and confirmed both passengers and their bags would fit within limits.
Example Sentence 2
With a full payload the airplane required a longer takeoff roll on the hot day.