August 18, 2018 17:35 Updated Follow If you buy service credit, that added service will increase your monthly pension benefit amount. Read more here. Related articles How do I decide if I want to buy extra service credit? I’m retiring from my PERF-covered position at the end of the month. My employer has agreed to re-hire me in the same job after 30 days. Is this legal? What is military service credit? I am a member of the Judges system. How do I get an estimate of my pension benefit? How much does service credit cost?