March 27, 2019 00:57 Updated Follow The fund’s actuary determines the gross annual payroll percentage amount. Related articles Can someone walk me through the PERF Hybrid and My Choice: Retirement Savings Plan options? What is the employer contribution rate for political subdivisions? What PERF plans can I offer my employees as a political subdivision employer? Does the gross annual payroll percentage remain the same or does it change? What is ERM?