TDCJ are required to do 85% of their sentence. The only possibility for parole is determined by the sentencing judge in the Judgement and Commitment Order. Ask your inmate's counselor f there is a provision for a parole hearing, usually commencing at the one-third mark in the sentence.
https://www.inmateaid.com/ask-the-inmate/i-have-a-friend-who-recently-signed-for-4-years-tdcj-for-evading-arrest-what-is-the-percentage-of-time-most-inmates-have-to-do-before-they-are-eligible-and-or-released-for-parole.amp#answer
Accepted Answer Date Created: March 29,2015