Picking up a part-time job in retirement can provide extra spending money, structure, and even a chance to boost future Social Security benefits, but it can also create confusion about how much you are allowed to earn. The Social Security earnings rules do not simply say that retirees can earn only a certain amount, despite how the rules are sometimes described. Whether your benefits are affected depends heavily on your age, how much you earn from work, and whether you reach full retirement age during the year. In 2026, someone collecting Social Security retirement benefits who remains under full retirement age for the entire year can earn up to $24,480 before the retirement earnings test begins reducing current benefit payments. Research from the Center for Retirement Research indicates that roughly 40% to 43% of older Americans work at some point after they start claiming benefits. So, if you are one of the many retirees who are still working after you start collecting Social Security, here are six things you need to know.