Here's Why You Should Claim Social Security at Full Retirement Age -- and Not Beyond
When it comes to signing up for Social Security, you have choices. You could claim benefits as early as age 62, or you could delay your filing all the way to your 70th birthday. In fact, technically, you don't have to sign up by age 70, though delaying your filing past that point won't benefit you financially.
In the middle of that age range is full retirement age (FRA) for Social Security purposes, and it's when you're entitled to collect your complete monthly benefit based on your wage history. Even though you have the option to claim Social Security before or after FRA, filing at your precise FRA could really work to your advantage.
Source Fool.com