If you work while you collect SS you have to “payback” SS if you make somewhere around $11,500 per year in earnings from employment.
Until you reach full retirement age, Social Security will subtract money from your retirement check if you exceed a certain amount of earned income for the year. For the year 2018, this limit on earned income is $17,040 ($1,420 per month). The amount goes up each year. If you are collecting Social Security retirement benefits before full retirement age, your benefits are reduced by $1 for every $2 you earn over the limit. Once you reach full retirement age, there is no limit on the amount of money you may earn and still receive your full Social Security retirement benefit.
Not after full retirement age.