The primary insurance amount (PIA) is equal to which of the following?

The primary insurance amount (PIA) is the benefit amount that an individual is entitled to receive from Social Security upon reaching retirement age, and it serves as the basis for calculating disability benefits as well. The PIA is determined by the person's average indexed monthly earnings (AIME) and is designed so that it reflects the benefits a worker would get if they retired at their full retirement age, which is traditionally set at 66 or 67, depending on the birth year.

While the maximum benefit may adjust with the age at which a person retires, the PIA specifically represents what a worker would receive if they retire at full retirement age. Choice B correctly identifies this as the full worker’s retirement benefit at age 65, encompassing the notion that individuals who have earned sufficient work credits are entitled to this benefit thereby reflecting their earnings history.

The other options represent variations that either do not reflect the conditions for calculating the primary insurance amount or pertain to different retirement ages that do not align with the established baseline used by the Social Security Administration for PIA calculations.