September 01, 2020 15:50 Updated Follow Your retirement date with PERF or TRF is the official date that we calculate your benefits and is always the first day of the month following your last day of work. It does not refer to your last day of work or the day you mail your application. Related articles At what age should I retire? If my last day of work is January 1, when is my retirement date? How do I retire from the Public Employees' Retirement Fund? Will my pension money run out? When do I get my retirement benefit?