Your retirement allowance is determined by your age, years of creditable service, three year-average annual rate of compensation, and your group classification. The maximum retirement allowance is 80% of the high three-year average annual rate of compensation. Your age factor times the number of years of service determines this percentage. For Members who join the system after 4/2/12, a five-year average annual rate of compensation will be used to calculate their retirement. In addition, the age factor table for member who join the system after 4/2/12 will require you to work longer for the same or similar benefit.