Understanding your full retirement age is like decoding the key to your retirement plan. If you were born between 1943 and 1954, full retirement benefits start at age 66. For those born from 1955 to 1960, it gradually moves up to 67. If you were born in 1960 or later, full retirement benefits start at age 67. Find your specific full retirement age by checking out the full retirement age chart provided by The United States Social Security Administration | SSA.