The minimum retirement age for U.S. Post Office employees ranges from 55 to 57 and varies depending on the birth year of the employee. The minimum age of retirement for employees born in 1948 or earlier is 55.
The minimum retirement age increases by two-month increments each year after 1948 until the period of 1953 to 1964. Individuals born during these years can retire early at age 56. The age then increases again by two months each year until 1970. Employees born in or after 1970 can retire starting at age 57, as of 2015.
Employees must have worked at least 10 years to retire early, but the amount they receive is 5 percent less for each year they retire under the age of 62. This penalty does not apply if the employee has 30 years of service or is 60 or older with 20 years of service.