Door locks have mechanical parts such as pints, springs, tailpieces, and latches. Each of the components is moving and will have a breaking point. The main question here is when it might happen. We will try to give you some ideas based on lock type, use cycles, weather environment, and many more reasons.
Based on our locksmith fieldwork stats and other professional sources, house locks should last 5-7 years. Since no single main reason decides door lock lifespan, some factors such as lock type, use cycles, weather environment, proper installation, and on-time lubricating will bring a verdict more precisely.