January 02, 2018 17:00 Updated Follow Members of many of our funds can buy prior military service credit. Please call us at (844) GO-INPRS for details. Related articles What is military service credit? How do I buy service credit? (1977 Fund) What is Hero’s Honor? When do I get a COLA if I'm in PERF? How many years of creditable service must I have in order for my spouse or child to receive a survivor benefit from PERF?