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Social Security: SSA benefits reduced if started before reaching full retirement age
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Q: By what percentage would my SSA retirement be reduced if started at age 63?

A: Retirement benefits are reduced by the number of months started before a person’s full retirement age (FRA), also called normal retirement age.


Determined by year of birth, FRA is scheduled to reach age 67 for people born in 1960 or later. 

Social Security retirement benefits can be started anytime during the year if you are at least age 62.

There is no need to wait for your birthday.  As a percentage, retirement benefits are reduced 5/9 of one percent for each month before FRA, up to 36 months. 

If the number of months exceeds 36, then the benefit is further reduced 5/12 of one percent per month. 

For example, if the number of reduction months is 60, the maximum number for retirement at 62 when FRA is 67, then the benefit is reduced by 30 percent. 

This maximum reduction is calculated as 36 months times 5/9 of 1 percent plus 24 months times 5/12 of 1 percent. 

Total percentages of reduction vary with full retirement age because the numbers of reduction months are different from full retirement age to age 62. 

For comparison, FRA is age 66 for people born between 1943 and 1954. For them, starting benefits at age 62 will provide 75 percent (25 percent reduction) of the full retirement age amount because an additional 48 months are involved.

However, FRA is age 66 and 6 months for people born in 1957.

For them, starting benefits at age 62 will provide 72.5 percent (27.5 percent reduction) of the full retirement age amount because an additional 54 months are involved.

Monthly retirement percentages are readily available on the Social Security website.

Go to “find your retirement age” in the retirement planner section at Click on your year of birth for monthly percentages. 

Note that Social Security survivor benefits, when based on age, are also reduced by the number of months before full retirement age involved but FRA for survivors benefits is different from FRA for retirement.


Based in Grand Forks, Howard I. Kossover is the Social Security Public Affairs Specialist for North Dakota and western Minnesota. Send general interest questions to him at Read his online articles at