The lifespan of a bathtub can vary greatly depending on the material it is made from. Generally speaking, bathtubs can last anywhere from 10 to 30 years. The exact lifespan will depend on factors such as the quality of the material, the level of care and maintenance given to the tub, and the amount of use it receives. Factors like scratches, cracks, or discoloration can also impact the longevity of a bathtub. Regardless of the material used, regular maintenance and care can help extend the lifespan of a bathtub.