According to a Bloomberg report, a record number Americans who are retired (or are collecting Social Security) worked part-time last month.
In December, a record 2.6 million workers had either reached full retirement or restricted themselves to work-weeks of 34 hours or less due to Social Security income limitations. Individuals can collect Social Security and work with no limit on earnings once they reach full retirement age. However, if they receive Social Security before full retirement age they will lose some of their benefit if they exceed the annual earnings limit. For 2016, this cap is $15,720. The penalty is a $1 deduction in Social Security for every $2 earned above the limit.