[header] How to get early release from prison [title] Calculate your maximum release date. [step] Any release prior to your maximum release date will be an early release. To calculate your maximum release date, start with the length of your sentence. 
Then subtract any day for which the judge already gave you credit. For example, you might have received credit for days served in jail prior to sentencing, any days after sentencing before you were transferred to prison, and credit for good behavior during your jail term.