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Prison release date calculator
Estimate when someone serving a standard determinate sentence in England and Wales will be released, under the rules in force from 1 October 2026.
Tagged curfew means electronically monitored bail of at least nine hours a day, as credited by the court. Additional days are those awarded in prison for breaking the rules. Nothing you enter is sent to us or stored.
How this is calculated
The calculator applies the release rules in force from 1 October 2026 to standard determinate sentences.
- Count the total number of days in the sentence.
- Take one third for most sentences, or one half where the sentence previously carried release at two thirds. Round up to a whole day.
- Subtract days spent on remand for the offence, and half the days spent on a qualifying electronically monitored curfew of at least nine hours a day, as credited by the court.
- Add any additional days awarded for breaking prison rules.
The result is an estimate. It gives no figure for excluded offences, which keep their previous release point, or for life, extended, indeterminate and other special sentences. People sentenced before 1 October 2026 move to the new release points in stages, so the prison’s date may be later. The prison calculates the official release date.
Read the full guide: How much of a prison sentence is served?
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