Between ages 65 and 67, individuals become eligible to receive 100% of their Social Security benefit. The age varies, depending on birth year. Individuals born in 1955, for example, become eligible to receive 100% of their benefits when they reach age 66 years and 2 months. Those born in 1960 or later need to reach age 67 before they’ll become eligible to receive full benefits.
http://www.mundofs.com/resource-center/retirement/important-birthdays-over-50
