economic life
noun[C]
ACCOUNTINGukus(alsouseful life);(effective life)thelengthoftimethat anassetisexpectedtocontinueto beuseful, or howlongtheassetcan be used beforerepairingitbecomesmoreexpensivethanreplacingit:
Technologicalassetsbecomeobsoletesofastthattheireconomiclifeis oftenshortened.