in the united states while the normal retirement age for social security or old age survivors insurance oasi historically has been age 65 to receive unreduced benefits it is gradually increasing to age 67 for those turning 65 in 2008 full benefits will be payable beginning at age 66n the united states while the normal retirement age for social security or old age survivors insurance oasi historically has been age 65 to receive unreduced benefits it is gradually increasing to age 67 for those turning 65 in 2008 full benefits will be payable beginning at age 66