Calculating Your SBCERA Benefit. SBCERA offers several resources to assist you in calculating your future benefit.On the home page under Service Credit, select Make a Service. Benefits calculator for San Bernardino County employees. You may be eligible to increase your CalPERS service credit through a service credit purchase. You can find your membership category and retirement formula on your Annual Member. The Purchasing Department is dedicated to assisting County departments provide these services through innovative and streamlined procurement services. San Bernardino City Unified School District (SBCUSD) has moved to online enrollment for all new students attending a SBCUSD elementary, middle, and high school. We encourage you to submit your service credit request at least one year prior to your retirement date. In order for us to include your purchased service credit.