What is the basis for calculating the length of time served for eligibility in parole?

The basis for calculating the length of time served for eligibility in parole is primarily focused on the amount of calendar time that an inmate has served, excluding any good conduct credit. This means that parole eligibility is determined based on the total time physically served in confinement, rather than any adjustments made for good behavior or other types of credit.

In many jurisdictions, the law grants parole eligibility after a specific portion of the sentence has been served, calculated strictly from the time spent in custody. This practice ensures clarity and consistency in determining when an inmate can be considered for parole, as it provides a straightforward method of accounting for time served without factoring in variables that could affect the calculation, like good conduct time.

Alternative options, such as good conduct time only or based on a calendrical month basis, do not reflect the accurate metrics used for determining the actual time served, and while every day served counts towards the overall sentence, the eligibility calculation specifically requires a more straightforward method focused solely on time physically spent in prison.