What is service credit? Service credit is one of the factors used to calculate a retirement benefit. The other factors are the member’s benefit tier, age at retirement, and final average compensation. For each biweekly payroll period a member works and pays contributions, service credit is granted. Purchasing service credit can increase a member’s retirement benefit and, in some cases, allow them to retire earlier. Purchasing eligible service credit does not change a member’s seniority date with the County of Kern, any Special District, or the date of membership in KCERA. Nor does it enhance any health insurance benefits. For more information on purchasing prior service credit, please click here: KCERA Forms Page and open the Purchase of Service FAQ in the Member Forms.