A side job, also informally called a side hustle or side gig, is an additional job that a person takes in addition to their primary job in order to supplement their income. Side jobs may be done out of necessity, when one's income from their main job is insufficient to support them, or simply out of a desire to earn more income. Working a side job can also, informally, be called moonlighting, usually when it is performed after normal working time. A side job can be a full-time job, part-time contract, or freelance work, and a person can hold more than one side job.