Retirement benefits are paid at the end of the month. The Department of Aging administers all aging programs and services for older Pennsylvanians across the commonwealth.Check eligibility if you're not sure what to apply for. Learn about retirement in Pennsylvania, from taxes and income to lifestyle choices. Pennsylvania is becoming a hot place to retire. To apply for SSI, fill out the online application, call (800) 772-1772 or visit your local. Social Security office. A member's normal retirement date is age 60 regardless of the length of service, or age 55 or older after completing twenty years of credited service. Despite a low cost of living, Pennsylvania offers a good quality of life for retirees. Is Pennsylvania retirement tax-friendly?