Answer: voluntary

AnswerCrossword Clue
voluntarySupported by contributions rather than taxes or fees
voluntaryDone, given, or acting of one's own free will
voluntarynot compulsory / music added to a piece at the will of the performer
voluntary(of a conveyance or disposition) Made without return in money or other consideration
voluntaryUnder the conscious control of the brain
voluntaryWorking, done, or maintained without payment