It completely depends on the usage. However, there is an average life of earphones that we must be aware of too. An earphone is bound to function well for 3 years while it may start malfunctioning after that or also tear apart. If there is any physical damage during the period, life may deteriorate. It is all about how you use it. If the wires and the earbuds are taken care of without any rough usage, it must come for a longer period. Further, for many people, the earphones are like a one-time investment.