This depends on the care that is given to the cover from year-to-year. If it is well cared for, then it should last many years. Some customers complained that theirs only last one or two years, but they did not say how the covers were stored or cared for during the months of storage. the first problem would be leaks, cracks, or holes in the cover. Some people experienced tearing and rips probably from trying to stretch the cover over the pool.