First-Grade Prison Classification in Spain: How to Appeal (2026)

Classification in first grade is the most restrictive situation in serving a sentence. It means the closed regime, with strong limitations on movement and communal life. As criminal defence lawyers, we explain how to challenge it.

What First Grade Is

First grade corresponds to the closed regime, designed for inmates classified as showing extreme dangerousness or a manifest inability to adapt to the ordinary and open regimes. It is the most severe grade of the prison system.

When It Applies

The application of first grade is exceptional. The nature of the offence is not enough: it must be grounded in the inmate's specific conduct within the facility. The rules require reinforced reasoning.

Periodic Reviews

Continued first-grade classification must be reviewed periodically, at least every three months. At each review the administration must assess whether the causes persist or whether progression to second grade is appropriate.

How to Appeal First Grade

Classification or regression to first grade can be appealed before the Prison Supervision Judge and then before the Provincial Court. The defence works to rebut the reasoning, prove the inmate's progress and seek grade progression.