You may be wondering how working at 70 might affect your Social Security checks. Working at 70 won't reduce your benefitsThere's no reason not to work while collecting Social Security at age 70. Working at 70 could raise your benefitsNot only is working at 70 not a problem from a Social Security standpoint, but it could actually lead to bigger checks. That's because your monthly Social Security benefit is based on your 35 highest-paid years of earnings. But either way, you should know that working at 70 while collecting Social Security isn't a problem.