March 27, 2019 00:57 Updated Follow The fund’s actuary determines the gross annual payroll percentage amount. Related articles What is the employer contribution rate for political subdivisions? Can someone walk me through the PERF Hybrid and My Choice: Retirement Savings Plan options? 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?