working life

noun2

1. •
   Of a person, the period of their life spent in employment, between leaving school and retirement.
2. •
   Of an object, its lifespan, especially a durable good; its expected duration or its actual duration.

   • Cheaper tires typically have a shorter working life than the pricier alternatives, which means that the total cost of ownership (per mile) is closer to equal although the upfront cost is more affordable.