Unused Sick Leave Since January of 2014, FERS employees receive 100% credit for their unused sick leave to their retirement. This means that you could use the sick leave to get more in retirement. Where to Now... Door #1: Back to FERS Minutes Pick a New Subject to Watch. View more Door #2: In Person or Remote Consultation Great for getting personalized information unique to your situation. Schedule Now Door #3: Personalized FERS Analysis Great for those who want to know more details about their specific retirement situation. Learn more Have a Question Name Email Address Phone Question Thank you! Oops!