Inmates receive good time at the beginning of the sentence. As the time is served, the inmate can only lose the good time they are given by receiving incidence reports. Normally, good time is 15% of the sentence.
https://www.inmateaid.com/ask-the-inmate/how-long-does-it-normally-take-it-to-find-out-if-a-inmate-has-received-their-good-time#answer
Accepted Answer Date Created: March 28,2015