Start with a date-by-date custody timeline and compare it with the credits the sentencing court recorded. Use booking and release records, jail transfer logs, the probation report, minute orders, sentencing transcript, and abstract of judgment. A mismatch may reveal a missing or duplicated period, but whether a period qualifies for credit depends on the statute and the facts of the case.

Keep actual custody days separate from conduct or work credits. Penal Code § 2900.5 addresses qualifying presentence custody attributable to the conduct for which sentence is imposed and generally allows a single credit for a period of custody even when sentences are consecutive. It directs the sentencing court to determine the admission and release dates and record the total credit in the abstract. (Penal Code § 2900.5) Conduct-credit rules are separate and can depend on the offense, dates, and other statutory limits. Do not apply a single formula to every case.

Reconcile each custody period

For each booking, transfer, or release, record the facility, date, case number, and why the custody occurred. Check for time attributed to another case or already credited against another sentence. Compare the resulting timeline with the probation report’s proposed days and the court’s calculation. Rule 4.411.5 addresses the report’s custody-period information and proposed credits; Rule 4.472 directs the court to record credits at sentencing and provides that challenges to a presentence report’s credit calculation are heard then. (California Rules of Court, rule 4.411.5; rule 4.472)

The sentencing court—not a spreadsheet alone—decides the qualifying admission and release dates. A hospital stay, treatment placement, or home detention does not automatically count as custody; the governing conditions and actual order must be reviewed. (Penal Code § 2900.5)

If the calculation error is found before sentencing, bring the records and a clear date list to counsel so the issue can be raised at sentencing. If a presentence credit error is discovered later, Penal Code § 1237.1 generally requires the issue to be presented to the trial court for correction before a credit-only appeal. (Penal Code § 1237.1)

The firm’s sentencing advocacy page provides general sentencing information. A credit review requires the custody records and sentencing documents. Contact the Law Offices of David S. Chesley at (800) 755-5174.