The limits that Social Security retirees can earn and still receive benefits varies by year and is subject to change each year. For example, in 2015, earnings in excess of $15,720 result in benefits being withheld by the Social Security Administration. For every $2 in earnings over the exempt amount, the SSA withholds $1 in benefits.
These amounts are only applicable to recipients drawing benefits at normal retirement age. The limit is higher in the year that the normal retirement age is reached. The higher amount for applicants who attain normal retirement age in 2015 is $41,880. For that year only, the SSA takes $1 for every $3 excess over that amount.