Good Time Credit; Calculating a Prison Out Date - revoked license
The Illinois Department of Corrections calculates prison sentences on a basic formula of divide the total time in half. Limitations to that formula are sentences that require 85% time be served or sentences where the legislature establishes a fixed minimum sentence. An example of a fixed minimum sentence would be the 180 consecutive day requirement for a 4th offender of 625 ILCS 5/6-303 commonly known as driving on a revoked or suspended license.
The Illinois Legislature has proposed the return of additional time credits that are discussed here:
Once upon a time the above calculation was slightly different in that the sentence was calculated as divide the total time in half and subtract six months. The new legislation may be a return to that sentencing structure. However, one should note that the IDOC first looks at the statutory minimum before giving any good time credit. Therefore, an individual who receives a one year sentence under the above referenced 180 day minimum 6-303 charge will still have to spend the 180 days in before getting the credit. In other words, 180 days really means 180 days.