When to apply for Social Security benefits is an important decision for retirees. There are three main options - apply at age 62 and receive reduced lifetime benefits, apply at full retirement age of 66 and receive full lifetime benefits, or apply at age 70 and receive additional credits for lifetime. Delaying benefits provides higher lifetime income the longer the retiree lives. For married couples, maximizing benefits requires considering spousal and survivor benefits which provide protection if one spouse dies. Overall, delaying benefits for at least one spouse and using retirement savings in the interim is often the most efficient strategy to maximize income in retirement.