Working during retirement could be a great decision for both your finances and your general well-being. A part-time job can provide extra income to cover rising expenses and make it easier to keep up with inflation. But beyond the financial benefits, working can also help you stay socially connected, add structure to your days, and relieve the boredom that may come with leaving the workforce. But if you're collecting Social Security, it's important to know about the program's earnings test.