How long will my investments last? Data from the U.S. Census Bureau claims that the U.S. life expectancy is about 75 for males and 80 for females. Medical advances and longer life expectancies are causing more and more individuals to stress about longer years in retirement, thus needing more planning and saving. The biggest worry for those looking at their retirement planning is not knowing whether or not they’ll have enough money and if they’ll ever outlive their savings. And while no individual can determine what age they’ll pass, it’s safe to say that in order to save for retirement you’ll want to set aside enough money to provide you with a suitable income for several decades. Think 25 years, maybe even 30.