You can apply up to 4 months before you want your retirement benefits to start. Q: How do I begin the retirement application process?The special rule lets us pay a full Social Security check for any whole month we consider you retired, regardless of your yearly earnings. Apply for your monthly retirement benefit any time between age 62 and 70. You can apply for Social Security retirement benefits when you reach age 62. Your Social Security card or a record of your number. You can start your retirement benefit at any point from age 62 up until age 70. Your benefit will be higher the longer you delay your start date. This. You can start your retirement benefit at any point from age 62 up until age 70. Your benefit will be higher the longer you delay your start date. This.